Vieworks CoaxPress VP Series, CoaxPress VP-101MX-M/C 9 H, CoaxPress VP-151MX-M/C 6 H User Manual
VP-101MX / VP-151MX
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Revision History
Revision
Date
Description
1.0
2019-05-24
Initial Release
VP-101MX / VP-151MX
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Contents
1 Precautions ..................................................................................................................... 6
2 Warranty .......................................................................................................................... 7
3 Compliance & Certifications .......................................................................................... 7
3.1 FCC Compliance ..................................................................................................................... 7
3.2 CE: DoC .................................................................................................................................. 7
3.3 KC ........................................................................................................................................... 7
4 Package Component ...................................................................................................... 8
5 Product Specifications................................................................................................... 9
5.1 Overview ................................................................................................................................. 9
5.2 Specifications ........................................................................................................................ 10
5.3 Camera Block Diagram .......................................................................................................... 11
5.4 Spectral Response ................................................................................................................ 12
5.4.1 Monochrome Spectral Response .................................................................................................. 12
5.4.2 Color Spectral Response .............................................................................................................. 14
5.5 Mechanical Specification ....................................................................................................... 16
6 Connecting the Camera ............................................................................................... 18
6.1 Precaution to Center the Image Sensor ................................................................ ................ 19
6.2 Precaution about Blurring Compared to the Center ............................................................... 19
6.3 Installing Vieworks Imaging Solution ..................................................................................... 19
7 Camera Interface .......................................................................................................... 20
7.1 General Description .............................................................................................................. 20
7.2 CoaXPress Connector .......................................................................................................... 21
7.2.1 CoaXPress Connector (75 Ω DIN 1.0/2.3 Receptacle) ................................................................. 21
7.3 Power Input Receptacle ........................................................................................................ 22
7.4 Control I/O Receptacle .......................................................................................................... 23
7.5 Trigger Input Circuit ............................................................................................................... 24
7.6 Strobe Output Circuit ............................................................................................................. 24
8 Acquisition Control ...................................................................................................... 25
8.1 Overview ............................................................................................................................... 25
8.2 Acquisition Start/Stop Commands and Acquisition Mode ...................................................... 28
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8.3 Exposure Start Trigger .......................................................................................................... 29
8.3.1 Trigger Mode ................................................................................................................................. 29
8.3.2 Using a Software Trigger Signal .................................................................................................... 32
8.3.3 Using a CoaXPress Trigger Signal ................................................................................................ 33
8.3.4 Using an External Trigger Signal ................................................................................................... 34
8.3.5 Exposure Mode ............................................................................................................................. 36
8.4 Setting the Exposure Time .................................................................................................... 38
8.5 Overlapping Exposure with Sensor Readout ......................................................................... 39
8.5.1 Overlapped .................................................................................................................................... 39
8.5.2 Non-overlapped ............................................................................................................................. 40
8.6 Rolling Shutter ...................................................................................................................... 41
8.7 Maximum Allowed Frame Rate .............................................................................................. 43
8.7.1 Increasing the Maximum Allowed Frame Rate .............................................................................. 43
9 Camera Features .......................................................................................................... 44
9.1 Image Region of Interest ....................................................................................................... 44
9.2 CXP Link Configuration ......................................................................................................... 47
9.3 Pixel Format .......................................................................................................................... 48
9.4 Data ROI (Color Camera) ...................................................................................................... 49
9.5 White Balance (Color Camera) .............................................................................................. 50
9.5.1 Balance White Auto ....................................................................................................................... 50
9.6 Gain and Black Level ............................................................................................................ 51
9.7 Hot Pixel Correction .............................................................................................................. 51
9.8 Dynamic Defective Pixel Correction ...................................................................................... 52
9.9 Defective Pixel Correction ..................................................................................................... 53
9.9.1 Correction Method ......................................................................................................................... 53
9.10 Flat Field Correction .............................................................................................................. 54
9.10.1 Flat Field Data Selector ................................................................................................................. 57
9.11 Digital I/O Control .................................................................................................................. 58
9.11.1 Strobe ............................................................................................................................................ 60
9.11.2 Debounce ...................................................................................................................................... 61
9.12 Timer Control ........................................................................................................................ 62
9.13 Cooling Control ..................................................................................................................... 64
9.14 Temperature Monitor ............................................................................................................. 65
9.15 Status LED ............................................................................................................................ 65
9.16 Test Pattern ........................................................................................................................... 66
9.17 Reverse X ............................................................................................................................. 68
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9.18 Device User ID ...................................................................................................................... 69
9.19 Device Reset ......................................................................................................................... 69
9.20 Field Upgrade ................................................................................................ ....................... 69
9.21 User Set Control ................................................................................................................... 70
9.22 Sequencer Control ................................................................................................................ 72
10 Troubleshooting ........................................................................................................... 75
Appendix A Defective Pixel Map Download .................................................................... 76
Appendix B Field Upgrade ................................................................................................ 78
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1 Precautions
General
Do not drop, disassemble, repair or alter the device. Doing so may damage the camera
electronics and cause an electric shock.
Do not let children touch the device without supervision.
Stop using the device and contact the nearest dealer or manufacturer for technical
assistance if liquid such as water, drinks or chemicals gets into the device.
Do not touch the device with wet hands. Doing so may cause an electric shock.
Make sure that the temperature of the camera does not exceed the temperature range
specified in 5.2 Specifications. Otherwise the device may be damaged by extreme
temperatures.
Installation and Maintenance
Do not install in dusty or dirty areas - or near an air conditioner or heater to reduce the
risk of damage to the device.
Avoid installing and operating in an extreme environment where vibration, heat, humidity,
dust, strong magnetic fields, explosive/corrosive mists or gases are present.
Do not apply excessive vibration and shock to the device. This may damage the device.
Avoid direct exposure to a high intensity light source. This may damage the image
sensor.
Do not install the device under unstable lighting conditions. Severe lighting change will
affect the quality of the image produced by the device.
Do not use solvents or thinners to clean the surface of the device. This can damage the
surface finish.
Power Supply
Applying incorrect power can damage the camera. If the voltage applied to the camera is
greater or less than the camera’s nominal voltage, the camera may be damaged or
operate erratically. Please refer to 5.2 Specifications for the camera’s nominal voltage.
※ Vieworks Co., Ltd. does NOT provide power supplies with the device.
Make sure the power is turned off before connecting the power cord to the camera.
Otherwise damage to the camera may result.
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2 Warranty
Do not open the housing of the camera. The warranty becomes void if the housing is opened.
For information about the warranty, please contact your local dealer or factory representative.
3 Compliance & Certifications
3.1 FCC Compliance
This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part
15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate
radio frequency energy and, if not installed and used in accordance with the instruction manual, may cause
harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause
harmful interference in which case the user will be required to correct the interference at his own expenses.
3.2 CE: DoC
EMC Directive 2014/30/EU
EN 55032:2012 (Class A), EN 55024:2010
Class A
3.3 KC
KCC Statement
Type
Description
Class A
(Broadcasting Communication
Device for Office Use)
This device obtained EMC registration for office use (Class A), and may be
used in places other than home. Sellers and/or users need to take note of
this.
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4 Package Component
Package Component
VP-101MX <M72-mount>
VP-151MX <M72-mount>
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5 Product Specifications
5.1 Overview
The VP-101MX and VP-151MX, the latest models of the industrial proven VP series, are new 101 and 151
megapixel resolution CMOS cameras available with the CoaXPress interface. The VP-101MX and VP-151MX
cameras are based on the latest CMOS image sensor technology (IMX461 and IMX411) from Sony
Semiconductor Solutions Corporation, and offer up to 8.7 frames per second at 11648 × 8742 and up to 6.2
frames per second at 14192 × 10640 resolution respectively. These cameras use thermo-electric Peltier (TEC)
cooling technology developed for and used by many demanding medical market customers. The TEC maintains
the operating temperature of the CMOS image sensor at up to 15 degrees below ambient temperature. These
cameras provide a stable operating condition and the ability to expose for a long period of time to increase
camera sensitivity. Featured with the stable operating capability and high resolution, these cameras are ideal for
demanding applications such as FPD, PCB and semiconductor inspections.
Main Features
High Speed 101 / 151 Megapixel CMOS Image Sensor
Thermoelectric Peltier Cooling – about 15 degrees below ambient temperature
Minimizing the number of hot pixels with TEC
Electronic Exposure Time Control (Rolling Shutter)
Output Pixel Format: 8 / 10 / 12 bit
Strobe Output
Dynamic Defective Pixel Correction
Output Channel: CXP × 4ch
CoaXPress Interface up to 25 Gbps using 4 coax cables
Gain / Black Level Control
Test Pattern
Temperature Monitor
Field Upgrade
DSNU and PRNU Correction
Flat Field Correction with Sequencer Control
Hot Pixel Correction
GenICam Compatible – XML based Control
VP-101MX / VP-151MX Feature Bar
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5.2 Specifications
The technical specifications of the VP-101MX and VP-151MX cameras are as follows.
Specifications
VP-101MX-M/C 9 H
VP-151MX-M/C 6 H
Active Image (H × V)
11648 × 8742
14192 × 10640
Sensor
Sony IMX461
Sony IMX411
Sensor Type
Back-Illuminated CMOS Image Sensor
Sensor Size (Diagonal)
43.80 ㎜ × 32.87 ㎜ (55 ㎜)
53.36 ㎜ × 40.01 ㎜ (66.7 ㎜)
Pixel size
3.76 ㎛ × 3.76 ㎛
Interface
CoaXPress
Electronic Shutter
Rolling Shutter
Max. Frame Rate
Overlapped: 8.7 fps
Overlapped: 6.2 fps
Pixel Data Format
8 bit / 10 bit / 12 bit
Exposure Time
1 ㎲ ~ 60 s (1 ㎲ step)
Partial Scan (Max. Speed)
679.1 fps at 2 Lines
546.4 fps at 2 Lines
Black Level Control
0 ~ 255 LSB at 12 bit
Gain Control
1× ~ 32×
Trigger
Synchronization
Overlapped
Free-Run
Non-overlapped
Hardware Trigger, Software Trigger or CXP
External Trigger
3.3 V ~ 24.0 V Logical level input, Optically isolated
Software Trigger
Asynchronous, Programmable via Camera API
Dynamic Range
78 ㏈
Lens Mount
M72-mount
Cooling Method
Thermoelectric Peltier Cooling
Cooling Performance
15 below ambient temperature / Standard cooling with a fan
Power
External
11 ~ 24 V DC
Dissipation
Typ. 26.0 W
Environmental
Operating: 0 ~ 40℃, Storage: -40℃ ~ 70℃
Dimension / Weight
100 ㎜ × 100 ㎜ × 88 ㎜, 1.1 ㎏
(with M72-mount)
110 ㎜ × 110 ㎜ × 85 ㎜, 1.4 ㎏
(with M72-mount)
API SDK
Vieworks Imaging Solution 7.X
Table 5.1 Specifications of VP-101MX / VP-151MX
VP-101MX / VP-151MX
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5.3 Camera Block Diagram
Figure 5.1 Camera Block Diagram
All controls and data processing of the VP-101MX and VP-151MX cameras are carried out in one FPGA chip.
The FPGA generally consists of a 32-bit RISC Micro-Controller and Processing & Control logic. The Micro-
Controller receives commands from the user through the CoaXPress interface and then processes them. The
Processing & Control logic processes the image data received from the CMOS image sensor and then transmits
data through the CoaXPress interface. The Processing & Control logic also controls the trigger inputs and strobe
outputs, which are sensitive to time. Furthermore, Flash and DDR3 are installed outside FPGA. The DDR3 is
used for the frame buffer to process images and the Flash stores the firmware to operate the Micro-Controller. A
Peltier Driver is applied to control a Thermoelectric Peltier Cooling unit.
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5.4 Spectral Response
5.4.1 Monochrome Spectral Response
The following graph shows the spectral response of the VP-101MX monochrome camera.
Figure 5.2 VP-101MX-M9 Spectral Response
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The following graph shows the spectral response of the VP-151MX monochrome camera.
Figure 5.3 VP-151MX-M6 Spectral Response
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5.4.2 Color Spectral Response
The following graph shows the spectral response of the VP-101MX color camera.
Figure 5.4 VP-101MX-C9 Spectral Response
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The following graph shows the spectral response of the VP-151MX color camera.
Figure 5.5 VP-151MX-C6 Spectral Response
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5.5 Mechanical Specification
The camera dimensions in millimeters are shown in the following figures.
Figure 5.6 Mechanical Dimension for VP-101MX-9 M72-mount
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Figure 5.7 Mechanical Dimension for VP-151MX-6 M72-mount
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6 Connecting the Camera
The following instructions assume that you have installed a CoaXPress Frame Grabber (hereinafter ‘CXP Frame
Grabber’) in your computer including related software. Procedures below also assume that you may attempt to
configure a link between a camera and CXP Frame Grabber by using four coax cables. For more detailed
information, refer to your CXP Frame Grabber User Manual.
To connect the camera to your computer, follow the steps below:
1. Make sure that the power supply is not connected to the camera and your computer is turned off.
2. Plug one end of a coax cable into the CH1 of the CXP connector on the camera and the other end of the
coax cable into the CH1 of the CXP Frame Grabber in your computer. Then, plug ends of the other three
coax cables into CH2, CH3 and CH4 of the CXP connector on the camera and the other ends of the coax
cables into the CH2, CH3 and CH4 of the CXP Frame Grabber respectively.
3. Connect the plug of the power adapter to the 6-pin power input receptacle on the camera.
4. Plug the power adapter into a working electrical outlet.
5. Verify all the cable connections are secure.
You must connect the CH1, CH2, CH3 and CH4 of the CXP connectors on the camera to
their respective connectors on the CXP Frame Grabber using four coax cables.
The VP-101MX and VP-151MX cameras do not support Power over CoaXPress
(PoCXP).
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6.1 Precaution to Center the Image Sensor
Users do not need to center the image sensor as it is adjusted as factory default settings.
When you need to adjust the center of the image sensor, please contact your local dealer or the
manufacturer for technical assistance.
6.2 Precaution about Blurring Compared to the Center
Users do not need to adjust the tilt as it is adjusted as factory default settings.
If the tilt settings need to be adjusted inevitably, please contact your local dealer or factory representative for
technical support.
6.3 Installing Vieworks Imaging Solution
You can download the Vieworks Imaging Solution at http://www.vieworks.com. You should perform the software
installation first and then the hardware installation.
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7 Camera Interface
7.1 General Description
As shown in the following figure, four types of connectors and an LED indicator are located on the back of the
camera and have the functions as follows:
① Status LED: displays power status and operation mode.
② 6 pin Power Input Receptacle: supplies power to the camera.
③ 4 pin Control I/O Receptacle: inputs external trigger signals and outputs strobe signals.
④ CoaXPress Connector: transmits video data and controls the camera.
Figure 7.1 VP-101MX with DIN 1.0/2.3-type Connectors
Figure 7.2 VP-151MX with DIN 1.0/2.3-type Connectors
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7.2 CoaXPress Connector
CoaXPress protocol includes an automatic link detection mechanism (Plug and Play) to correctly detect the
camera to the CXP Frame Grabber connection. The connection between the camera and CXP Frame Grabber
uses a coax (also known as ‘coaxial’) cable and provides up to 6.25 Gbps bit rate per cable.
7.2.1 CoaXPress Connector (75 Ω DIN 1.0/2.3 Receptacle)
Figure 7.3 CoaXPress DIN 1.0/2.3-type Connectors
The CoaXPress connectors on the VP-101MX and VP-151MX cameras comply with the CoaXPress standard
and the following table shows the channel assignments.
Channel
Max. Bit Rate per Coax
Type
CH1
6.25 Gbps
Master Connection
CH2
6.25 Gbps
Extension Connection
CH3
6.25 Gbps
Extension Connection
CH4
6.25 Gbps
Extension Connection
Table 7.1 Channel Assignments for CoaXPress Connectors
When you connect a camera to a CXP Frame Grabber using coax cables, make sure to
connect the cables to their correct channels. If you connect the CH1 of the CXP connector on
the camera to a channel other than CH1 of the CXP Frame Grabber, the camera may not
transmit images properly or the communication between the computer and camera may fail.
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7.3 Power Input Receptacle
The power input receptacle is a Hirose 6 pin connector (part # HR10A-7R-6PB). The pin assignments and
configurations are as follows:
1
2
3 4
5
6
Figure 7.4 Pin Assignments for Power Input Receptacle
Pin Number
Signal
Type
Description
1, 2, 3
+12V DC
Input
DC Power Input
4, 5, 6
DC Ground
Input
DC Ground
Table 7.2 Pin Configurations for Power Input Receptacle
A recommended mating connector for the Hirose 6 pin connector is the Hirose 6 pin plug
(part # HR10A-7P-6S) or the equivalent.
It is recommended that you use the power adapter, which has at least 4 A current output
at 11 ~ 24 V voltage output (You need to purchase a power adapter separately.).
Precaution for Power Input
Make sure the power is turned off before connecting the power cord to the camera.
Otherwise, damage to the camera may result.
If the voltage applied to the camera is greater than specified in the specifications,
damage to the camera may result.
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7.4 Control I/O Receptacle
The Control I/O Receptacle is a Hirose 4 pin connector (part # HR10A-7R-4S) and consists of an external trigger
signal input and strobe output ports. The pin assignments and configurations are as follows:
1
2
4
3
Figure 7.5 Pin Assignments for Control I/O Receptacle
Pin Number
Signal
Type
Description
1
Trigger Input +
Input
3.3 V ~ 5.0 V TTL input
2
Trigger Input -
Input - 3
DC Ground
-
DC Ground
4
Line1 Output
Output
3.3 V TTL Output
Output resistance: 47 Ω
Table 7.3 Pin Configurations for Control I/O Receptacle
A recommended mating connector for the Hirose 4 pin connector is the Hirose 4 pin plug (part
# HR10A-7P-4P) or the equivalent.
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7.5 Trigger Input Circuit
The following figure shows trigger signal input circuit of the 4 pin connector. Transmitted trigger signal is applied
to the internal circuit through a photo coupler. With the Debounce feature, you can specify the width of input
signal to be considered as a valid input signal. An external trigger circuit example is shown below.
Figure 7.6 Trigger Input Schematic
7.6 Strobe Output Circuit
The strobe output signal comes out through a 3.3 V output level of TTL Driver IC. A pulse width of signal is
synchronized with an exposure (shutter) signal of the camera.
Figure 7.7 Strobe Output Schematic
1
2
4
3
HR10A-7R-4SB
Trigger_In-
HCPL-0601
1K
+3.3V
TRIGGER_INPUT
Your GND
+3.3V ~ +24V
IR38 180/1608
Trigger_In+
SD
MMBF4393LT1G
2
3
1
Camera SideUser Side
3.3 V
STROBE_SIGNAL
TTL Driver
47 Ω
0 V
+3.3V
3.3 V
1
2
4
3
HR10A-7R-4SB
STROBE_OUT
TRIGGER_IN +
TRIGGER_IN -
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8 Acquisition Control
This chapter provides detailed information about controlling image acquisition.
Triggering image acquisition.
Setting the exposure time
Controlling the camera’s image acquisition rate
Variation of the camera’s maximum allowed image acquisition rate according to the camera settings
8.1 Overview
This section presents an overview of the elements involved with controlling the acquisition of images.
Three major elements are involved in controlling the acquisition of images:
Acquisition Start and Acquisition Stop commands and Acquisition Mode parameter
Exposure start trigger
Exposure time control
When reading the explanations in the overview and in this entire chapter, keep in mind that the
term frame is typically used to mean a single acquired image.
Acquisition Start and Stop Commands and Acquisition Mode
The Acquisition Start command prepares the camera to acquire frames. The camera cannot acquire frames
unless an Acquisition Start command has first been executed.
A parameter called the Acquisition Mode has a direct bearing on how the Acquisition Start command
operates. The VP-101MX and VP-151MX cameras only support Continuous for the Acquisition Mode
parameter. If the Acquisition Mode parameter is set to Continuous, an Acquisition Start command does not
expire after a single frame is acquired. Once an Acquisition Start command has been executed, you can
acquire as many frames as you like. The Acquisition Start command will remain in effect until you execute an
Acquisition Stop command. Once an Acquisition Stop command has been executed, the camera will not be
able to acquire frames until a new Acquisition Start command is executed.
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Exposure Start Trigger
Applying an exposure start trigger signal to the camera will exit the camera from the waiting for exposure start
trigger acquisition status and will begin the process of exposing and reading out a frame (see Figure 8.1).
As soon as the camera is ready to accept another exposure start trigger signal, it will return to the waiting for
exposure start trigger acquisition status. A new exposure start trigger signal can then be applied to the camera to
begin another frame exposure. The exposure start trigger has two modes: off and on.
If the Trigger Mode parameter is set to Off, the camera will generate all required exposure start trigger signals
internally, and you do not need to apply exposure start trigger signals to the camera. The rate at which the
camera will generate the signals and acquire frames will be determined by the way that you set several frame
rate related parameters.
If the Trigger Mode parameter is set to On, you must trigger exposure start by applying exposure start trigger
signals to the camera. Each time a trigger signal is applied, the camera will begin a frame exposure. When
exposure start is being triggered in this manner, it is important that you do not attempt to trigger frames at a rate
that is greater than the maximum allowed (There is a detailed explanation about the maximum allowed frame
rate at the end of this chapter.). Exposure start trigger signals applied to the camera when it is not in a waiting for
exposure start trigger acquisition status will be ignored.
Figure 8.1 Exposure Start Triggering
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Applying Trigger Signals
The paragraphs above mention “applying a trigger signal”. There are four ways to apply an exposure start trigger
signal to the camera: via Software, via User Output0, via CXPin or via Line0 (commonly referred to a
hardware).
To apply trigger signals via Software, you must set the Trigger Source parameter to Software. At that point,
each time a Trigger Software command is executed, the exposure start trigger signal will be applied to the
camera.
To apply trigger signals via User Output0, you must set the Trigger Source parameter to User Output0. At that
point, you can apply an exposure start trigger signal to the camera by switching the User Output Value
parameter between On (rise) and Off (fall).
To apply trigger signals via CH1 of the CXP Frame Grabber, you must set the Trigger Source parameter to
CXPin. At that point, each time a proper CoaXPress trigger signal is applied to the camera by using the APIs
provided by a CXP Frame Grabber manufacturer, the exposure start trigger signal will be applied to the camera.
For more information, refer to your CXP Frame Grabber User Manual.
To apply trigger signals via hardware (external), you must set the Trigger Source parameter to Line0. At that
point, each time a proper electrical signal is applied to the camera, an occurrence of the exposure start trigger
signal will be recognized by the camera.
Exposure Time Control
When an exposure start trigger signal is applied to the camera, the camera will begin to acquire a frame.
A critical aspect of frame acquisition is how long the pixels in the camera’s sensor will be exposed to light during
the frame acquisition.
If the Trigger Source parameter is set to Software, the Exposure Time parameter will determine the exposure
time for each frame.
If the Trigger Source parameter is set to User Output0, CXPin or Line0, there are two modes of operation:
Timed and Trigger Width.
With the Timed mode, the Exposure Time parameter will determine the exposure time for each frame.
With the Trigger Width mode, the way that you manipulate the rise and fall of the User Output, CoaXPress or
hardware (external) signal will determine the exposure time. The Trigger Width mode is especially useful if you
want to change the exposure time from frame to frame.
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8.2 Acquisition Start/Stop Commands and Acquisition Mode
Executing an Acquisition Start command prepares the camera to acquire frames. You must execute an
Acquisition Start command before you can begin acquiring frames.
Executing an Acquisition Stop command terminates the camera’s ability to acquire frames.
When the camera receives an Acquisition Stop command:
If the camera is not in the process of acquiring a frame, its ability to acquire frames will be terminated
immediately.
If the camera is in the process of acquiring a frame, the frame acquisition process will be allowed to finish
and the camera’s ability to acquire new frames will be terminated.
When you execute the Acquisition Start command while the previous frame acquisition
process is still in progress, the command will be ignored. To avoid this, you must wait a
minimum readout time (refer to Table 8.2 Readout Time) after the execution of the Acquisition
Stop command. Then, you can safely execute the Acquisition Start command again.
The VP-101MX and VP-151MX cameras only provides the Continuous mode of operation for the Acquisition
Mode.
After an Acquisition Start command has been executed, exposure start can be triggered as desired. Each time
an exposure start trigger is applied while the camera is in a waiting for exposure start trigger acquisition status,
the camera will acquire and transmit a frame. The camera will retain the ability to acquire frames until an
Acquisition Stop command is executed. Once the Acquisition Stop command is received, the camera will no
longer be able to acquire frames.
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8.3 Exposure Start Trigger
The Trigger Selector parameter is used to select a type of trigger and only the Exposure Start trigger is
available on the VP-101MX and VP-151MX cameras. The Exposure Start trigger is used to begin frame
acquisition. Exposure start trigger signals can be generated within the camera or may be applied externally by
setting the Trigger Source parameter to Software, User Output0, CXPin or Line0. If an exposure start trigger
signal is applied to the camera, the camera will begin to expose a frame.
8.3.1 Trigger Mode
The main parameter associated with the exposure start trigger is the Trigger Mode parameter.
The Trigger Mode parameter for the exposure start trigger has two available settings: Off and On.
8.3.1.1 Trigger Mode = Off
When the Trigger Mode parameter is set to Off, the camera will generate all required exposure start trigger
signals internally, and you do not need to apply exposure start trigger signals to the camera.
If the Trigger Mode parameter is set to Off, the camera will automatically begin generating exposure start trigger
signals when it receives an Acquisition Start command. The camera will continue to generate exposure start
trigger signals until it receives an Acquisition Stop command.
Free Run
When you set the Trigger Mode parameter to Off, the camera will generate all required trigger
signals internally. When the camera is set this way, it will constantly acquire images without
any need for triggering by the user. This use case commonly referred as “free run”.
The rate at which the exposure start trigger signals are generated may be determined by the camera’s
Acquisition Frame Rate parameter.
If the parameter is set to a value less than the maximum allowed frame rate with the current camera
settings, the camera will generate exposure start trigger signals at the rate specified by the parameter
setting.
If the parameter is set to a value greater than the maximum allowed frame rate with the current camera
settings, the camera will generate exposure start trigger signals at the maximum allowed frame rate.
Exposure Time Control with Trigger Mode = Off
When the Trigger Mode parameter is set to Off, the exposure time for each frame acquisition is determined by
the value of the camera’s Exposure Time parameter. For more information about the Exposure Time parameter,
see 8.4 Setting the Exposure Time.
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8.3.1.2 Trigger Mode = On
When the Trigger Mode parameter is set to On, you must apply an exposure start trigger signal to the camera
each time you want to begin a frame acquisition. The Trigger Source parameter specifies the source signal that
will act as the exposure start trigger signal.
The available settings for the Trigger Source parameter are:
Software: You can apply an exposure start trigger signal to the camera by executing a Trigger
Software command for the exposure start trigger on your computer.
User Output0: You can apply an exposure start trigger signal to the camera by switching the User Output
Value parameter between On and Off on your computer.
CXPin: You can apply an exposure start trigger signal via CH1 of the CXP Frame Grabber.
For more information, refer to your CXP Frame Grabber User Manual.
Line0: You can apply an exposure start trigger signal to the camera by injecting an externally
generated electrical signal (commonly referred to as a hardware or external trigger signal)
into the Control I/O receptacle on the camera. Refer to 7.5 Trigger Input Circuit for more
information.
Timer0Active: You can apply an exposure start trigger signal to the camera using a user defined Timer
signal. When you set the Timer Trigger Source parameter to Line0 in the Counter And
Timer Control category, you can specify a delay for the Line0 signal by using the Timer
Delay parameter. For more information, refer to 9.12 Timer Control.
You must also set the Trigger Activation parameter after setting the Trigger Source parameter.
The available settings for the Trigger Activation parameter are:
Falling Edge: Specifies that a falling edge of the electrical signal will act as the exposure start trigger.
Rising Edge: Specifies that a rising edge of the electrical signal will act as the exposure start trigger.
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Exposure Time Control with Trigger Mode = On
When the Trigger Mode parameter is set to On and the Trigger Source parameter is set to Software, the
exposure time for each frame acquisition is determined by the value of the camera’s Exposure Time parameter.
When the Trigger Mode parameter is set to On and the Trigger Source parameter is set to CXPin or Line0,
the exposure time for each frame acquisition will be determined by the Exposure Mode parameter settings as
follows:
Exposure Mode = Timed: Exposure time can be controlled with the Exposure Time parameter.
Exposure Mode = Trigger Width: Exposure time can be controlled by manipulating the external trigger
signal.
When the Trigger Mode parameter is set to On and the Trigger Source parameter is set to User Output0, the
exposure time for each frame acquisition will be determined by the Exposure Mode parameter settings as
follows:
Exposure Mode = Timed: Exposure time can be controlled with the Exposure Time parameter.
Exposure Mode = Trigger Width: Exposure time can be controlled by switching the User Output Value
parameter between On and Off.
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8.3.2 Using a Software Trigger Signal
If the Trigger Mode parameter is set to On and the Trigger Source parameter is set to Software, you must
apply a software trigger signal (exposure start) to the camera to begin each frame acquisition. Assuming that the
camera is in a waiting for exposure start trigger acquisition status, frame exposure will start when the software
trigger signal is received by the camera. Figure 8.2 illustrates frame acquisition with a software trigger signal.
When the camera receives a software trigger signal and begins exposure, it will exit the waiting for exposure
start trigger acquisition status because at that point, it cannot react to a new exposure start trigger signal.
As soon as the camera is capable of reacting to a new exposure start trigger signal, it will automatically return to
the waiting for exposure start trigger acquisition status.
The exposure time for each acquired frame will be determined by the value of the camera’s Exposure Time
parameter.
Figure 8.2 Frame Acquisition with Software Trigger Signal
When you are using a software trigger signal to start each frame acquisition, the frame rate will be determined by
how often you apply a software trigger signal to the camera, and you should not attempt to trigger frame
acquisition at a rate that exceeds the maximum allowed for the current camera settings (There is a detailed
explanation about the maximum allowed frame rate at the end of this chapter.). Software trigger signals that are
applied to the camera when it is not ready to receive them will be ignored.
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8.3.3 Using a CoaXPress Trigger Signal
If the Trigger Mode parameter is set to On and the Trigger Source parameter is set to CXPin, you must apply a
CoaXPress trigger signal to the camera to begin each frame acquisition. A CoaXPress trigger signal will acts as
the exposure start trigger signal for the camera. For more information, refer to your CXP Frame Grabber User
Manual.
A rising edge or a falling edge of the CoaXPress signal can be used to trigger frame acquisition. The Trigger
Activation parameter is used to select rising edge or falling edge triggering.
Assuming that the camera is in a waiting for exposure start trigger acquisition status, frame acquisition will start
whenever the appropriate edge transition is received by the camera.
When the camera receives a CoaXPress trigger signal and begins exposure, it will exit the waiting for exposure
start trigger acquisition status because at that point, it cannot react to a new exposure start trigger signal.
As soon as the camera is capable of reacting to a new exposure start trigger signal, it will automatically return to
the waiting for exposure start trigger acquisition status.
When the camera is operating under control of a CoaXPress signal, the period of the CoaXPress trigger signal
will determine the rate at which the camera is acquiring frames:
For example, if you are operating a camera with a CoaXPress trigger signal period of 500 ㎳ (0.5 s):
So in this case, the frame rate is 2 fps.
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8.3.4 Using an External Trigger Signal
If the Trigger Mode parameter is set to On and the Trigger Source parameter is set to Line0, an externally
generated electrical signal injected into the Control I/O Receptacle will act as the exposure start trigger signal for
the camera. This type of trigger signal is generally referred to as a hardware trigger signal.
A rising edge or a falling edge of the external signal can be used to trigger frame acquisition. The Trigger
Activation parameter is used to select rising edge or falling edge triggering.
Assuming that the camera is in a waiting for exposure start trigger acquisition status, frame acquisition will start
whenever the appropriate edge transition is received by the camera.
When the camera receives an external trigger signal and begins exposure, it will exit the waiting for exposure
start trigger acquisition status because at that point, it cannot react to a new exposure start trigger signal.
As soon as the camera is capable of reacting to a new exposure start trigger signal, it will automatically return to
the waiting for exposure start trigger acquisition status.
When the camera is operating under control of an external signal, the period of the external trigger signal will
determine the rate at which the camera is acquiring frames:
For example, if you are operating a camera with an External trigger signal period of 500 ㎳ (0.5 s):
So in this case, the frame rate is 2 fps.
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8.3.4.1 External Trigger Delay
When you set the Trigger Source parameter to Timer0Active, you can specify a delay between the receipt of a
hardware trigger signal and when the trigger becomes effective.
1. Set the Timer Tigger Source parameter in the Counter And Timer Control category to Line0.
2. Set the Timer Delay parameter to the desired Timer delay in microseconds.
3. Set the Trigger Source parameter in the Acquisition Control category to Timer0Active.
4. Execute the Acquisition Start command and inject an externally generated electrical signal into the Control
I/O Receptacle. Then, the delay set by the Timer Delay parameter expires and the exposure for image
acquisition begins.
Figure 8.3 External Trigger Delay
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8.3.5 Exposure Mode
If you are triggering the start of frame acquisition with an externally (CoaXPress or External) generated trigger
signal, two exposure modes are available: Timed and Trigger Width.
Timed Exposure Mode
When the Timed mode is selected, the exposure time for each frame acquisition is determined by the value of
the camera’s Exposure Time parameter. If the camera is set for rising edge triggering, the exposure time starts
when the external trigger signal rises. If the camera is set for falling edge triggering, the exposure time starts
when the external trigger signal falls. The following figure illustrates Timed exposure with the camera set for
rising edge triggering.
Figure 8.4 Timed Exposure Mode
Note that if you attempt to trigger a new exposure start while the previous exposure is still in progress, the trigger
signal will be ignored.
Figure 8.5 Trigger Overlapped with Timed Exposure Mode
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Trigger Width Exposure Mode
When the Trigger Width exposure mode is selected, the length of the exposure for each frame acquisition will
be directly controlled by the external trigger signal (CoaXPress or External). If the camera is set for rising edge
triggering, the exposure time begins when the external trigger signal rises and continues until the external trigger
signal falls. If the camera is set for falling edge triggering, the exposure time begins when the external trigger
signal falls and continues until the external trigger signal rises. The following figure illustrates Trigger Width
exposure with the camera set for rising edge triggering.
Trigger Width exposure is especially useful if you intend to vary the length of the exposure time for each frame.
Figure 8.6 Trigger Width Exposure Mode
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8.4 Setting the Exposure Time
This section describes how the exposure time can be adjusted manually by setting the value of the Exposure
Time parameter. If you are operating the camera in any one of the following ways, you must specify an exposure
time by setting the camera’s Exposure Time parameter.
the Trigger Mode is set to Off.
the Trigger Mode is set to On and the Trigger Source is set to Software.
the Trigger Mode is set to On, the Trigger Source is set to CXPin or Line0, and the Exposure Mode is
set to Timed.
The Exposure Time parameter must not be set below a minimum specified value. The Exposure Time
parameter sets the exposure time in microseconds (㎲). The minimum and maximum exposure time settings for
the VP-101MX and VP-151MX cameras are shown in the following table.
Camera Model
Number of Channels
Minimum Exposure Time
Maximum Exposure Time
†
VP-101MX
VP-151MX
4 Channels
1 ㎲
60,000,000 ㎲
†: When the Exposure Mode is set to Trigger Width, the exposure time is controlled by the external trigger
signal and has no maximum limit.
Table 8.1 Minimum and Maximum Exposure Time Setting
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8.5 Overlapping Exposure with Sensor Readout
The frame acquisition process on the camera includes two distinct parts. The first part is the exposure of the
pixels in the image sensor. Once exposure is complete, the second part of the process – readout of the pixel
values from the sensor – takes place. In regard to this frame acquisition process, the VP-101MX and VP-151MX
cameras can be operated in the Overlapped acquisition mode or the Non-overlapped acquisition mode.
8.5.1 Overlapped
When the Trigger Mode parameter is set to Off (Free-run mode), the camera operates with ‘overlapped’
acquisition so that the exposure for a new frame can be overlapped with the sensor readout for the previous
frame. The exposure of a new frame begins while the camera is still reading out the sensor data for the
previously acquired frame.
Figure 8.7 Overlapped Exposure and Readout
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8.5.2 Non-overlapped
When the Trigger Mode parameter is set to On, each time a frame is acquired the camera completes the entire
exposure/readout process before acquisition of the next frame is started. The exposure for a new frame does not
overlap the sensor readout for the previous frame. The following figure illustrates the Trigger Mode parameter
set to On, the Trigger Source parameter set to Line0, and the Exposure Mode parameter set to Trigger
Width.
Figure 8.8 Non-overlapped Exposure and Sensor Readout
Guidelines for Non-overlapped Operation
If the Trigger Mode parameter is set to On and you are operating the camera in the non-overlapped mode, you
must keep in mind the following:
You must not begin the exposure for the current frame until the readout for the previous frame is complete.
When you are operating the camera with non-overlapped exposure and using an external trigger signal to trigger
image acquisition, you could use the camera’s Exposure Time parameter settings and readout time to calculate
when it is safe to begin each new acquisition.
Camera Model
Readout Time
VP-101MX
12.91 ㎲ [1 horizontal line time] × 8854 [1 Vertical Period]
VP-151MX
15.0 ㎲ [1 horizontal line time] × 10760 [1 Vertical Period]
Table 8.2 Readout Time
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8.6 Rolling Shutter
The VP-101MX and VP-151MX cameras are equipped with an image sensor that has an electronic rolling
shutter. The camera exposes and reads out the pixel line with a temporal offset (tRow) from one line to the next.
When a trigger signal is applied to the camera, the camera resets the top line of pixels (Line 1) and begins
exposing that line. The camera resets line two tRow later and begins exposing the line. And so on until the
bottom line of pixels (Line N) is reached. The pixel values for each line are read out at the end of exposure for
the line. The readout time for each line is identical to the tRow value.
Figure 8.9 Rolling Shutter Operation
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The tRow value for the VP-101MX camera depending on the camera’s CoaXPress setting is as follows:
Number of Channels
tRow
4 Channels
12.91 ㎲
Table 8.3 Temporal Offset Value for the VP-101MX
The tRow value for the VP-151MX camera depending on the camera’s CoaXPress setting is as follows:
Number of Channels
tRow
4 Channels
15.0 ㎲
Table 8.4 Temporal Offset Value for the VP-151MX
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8.7 Maximum Allowed Frame Rate
In general, the maximum allowed acquisition frame rate on the camera may be limited by several factors:
The amount of time that it takes to transmit an acquired frame from the camera to your computer.
The amount of time needed to transmit a frame depends on the bandwidth assigned to the camera.
The amount of time it takes to read an acquired frame out of the image sensor and into the camera’s frame
buffer. This time varies depending on the setting for the Height parameter. Frames with a smaller height take
less time to read out of the sensor. The frame height is determined by the camera’s Height settings in the
Image Format Control category.
The exposure time for acquired frames. If you use very long exposure time, you can acquire fewer frames
per second.
8.7.1 Increasing the Maximum Allowed Frame Rate
You may find that you would like to acquire frames at a rate higher than the maximum allowed with the camera’s
current settings. In this case, you must adjust one or more of the factors that can influence the maximum allowed
frame rate and then check to see if the maximum allowed frame rate has increased.
The time that it takes to transmit a frame out of the camera is the main limiting factor on the frame rate. You
can decrease the frame transmission time (and thus increase the maximum allowed frame rate) by using
the ROI feature.
Decreasing the size of the Image ROI may increase the maximum allowed frame rate. If possible,
decrease the height of the Image ROI.
If you are using normal exposure times and you are using the camera at its maximum resolution, your
exposure time will not normally restrict the frame rate. However, if you are using long exposure time, it is
possible that your exposure time is limiting the maximum allowed frame rate. If you are using a long
exposure time, try using a shorter exposure time and see if the maximum allowed frame rate increases (You
may need to compensate for a lower exposure time by using a brighter light source or increasing the
opening of your lens aperture.).
A very long exposure time severely limits the camera’s maximum allowed frame rate. As an
example, assume that your camera is set to use a 1 second exposure time. In this case,
because each frame acquisition will take at least 1 second to be completed, the camera will
only be able to acquire a maximum of one frame per second.
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9 Camera Features
9.1 Image Region of Interest
The Image Region of Interest (ROI) feature allows you to specify a portion of the sensor array. You can acquire
only the frame data from the specified portion of the sensor array while preserving the same quality as you
acquire a frame from the entire sensor array.
With the ROI feature, you can increase the maximum allowed frame rate by decreasing the Height parameter;
however, decreasing the Width parameter does not affect the frame rate. The ROI is referenced to the top left
corner [origin (0, 0)] of the sensor array as shown below.
Figure 9.1 Region of Interest
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The XML parameters related to ROI settings are as follows.
XML Parameters
Value
Description
ImageFormatControl
SensorWidth
a
-
Effective width of the sensor
SensorHeight
a
-
Effective height of the sensor
WidthMax
-
Maximum allowed width of the image width the current
camera settings
HeightMax
-
Maximum allowed height of the image with the current
camera settings
Width
b
-
Sets the Width of the Image ROI.
Height
b
-
Sets the Height of the Image ROI.
OffsetX
c
-
Sets the horizontal offset from the origin to the Image ROI.
OffsetY
c
-
Sets the vertical offset from the origin to the Image ROI.
The unit of all parameters in this table is pixel.
a: Read only. User cannot change the value.
b: User configurable parameters for setting ROI
c: User configurable parameters for setting the origin of the ROI.
Table 9.1 XML Parameters related to ROI
You can change the size of ROI by setting the Width and Height parameters in the Image Format Control
category. You can also change the position of the ROI origin by setting the Offset X and Offset Y parameters.
Make sure that the Width + Offset X value is less than the Width Max value, and the Height + Offset Y value is
less than the Height Max value. You must set the size of the ROI first, and then set the Offset values since the
Width and Height parameters are set to its maximum value by default.
On the VP-101MX and VP-151MX cameras, the Width parameter must be set to a multiple of 16, and the
Height parameter must be set to a multiple of 2.
The minimum allowed setting values for the ROI Width and Height are shown below.
Camera Model
Minimum Width Settings
Minimum Height Settings
VP-101MX
VP-151MX
64
2
Table 9.2 Minimum ROI Width and Height Settings
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On the VP-101MX camera, the maximum allowed frame rates depending on Vertical ROI changes are shown
below.
ROI Size (H × V)
Max. Frame Rate
11648 × 2
679.1 fps
11648 × 2000
36.6 fps
11648 × 4000
18.8 fps
11648 × 6000
12.6 fps
11648 × 8000
9.5 fps
11648 × 8742
8.7 fps
Table 9.3 Maximum Frame Rates by VP-101MX Vertical ROI Changes
On the VP-151MX camera, the maximum allowed frame rates depending on Vertical ROI changes are shown
below.
ROI Size (H × V)
Max. Frame Rate
14192 × 2
546.4 fps
14192 × 2000
31.4 fps
14192 × 4000
16.2 fps
14192 × 6000
10.9 fps
14192 × 8000
8.2 fps
14192 × 10640
6.2 fps
Table 9.4 Maximum Frame Rates by VP-151MX Vertical ROI Changes
Your CXP Frame Grabber may place additional restrictions on how the ROI location and size
must be set. Refer to your CXP Frame Grabber user manual for more information.
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9.2 CXP Link Configuration
The VP-101MX and VP-151MX cameras must be connected to a CXP Frame Grabber installed in your computer
via CoaXPress interface. CoaXPress interface allows you to connect a camera to a CXP Frame Grabber by
using simple coax cabling and allows up to 6.25 Gbps data rate per cable. The VP-101MX and VP-151MX
cameras support one master connection and up to three extension connections to configure a link. In compliance
with the CoaXPress standard, the VP-101MX and VP-151MX cameras include an automatic link detection
mechanism (Plug and Play) to correctly detect the camera to CXP Frame Grabber connections.
Figure 9.2 CXP Link Configuration
The XML parameters related to the link configuration between the camera and CXP Frame Grabber are as
follows.
XML Parameters
Value
Description
CoaXPress
CxpLinkConfigurationPreferredSwitch
CXP3_X4
Sets the A parameter value to CXP3_X4.
CXP6_X4
Sets the A parameter value to CXP6_X4.
CxpLinkConfigurationPreferred
A
Read Only
Displays bit rate and the number of
connections to be set for the link
configuration between the camera and Host
(Frame Grabber) while discovering devices.
CXPLinkConfiguration
CXP3_X4
CXP6_X4
Forcefully sets bit rate and the number of
connections for the link configuration.
ex) CXP6_X4: Four connections running at
a maximum of CXP6 speed (6.25 Gbps).
Table 9.5 XML Parameters related to CXP Link Configuration
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9.3 Pixel Format
The camera processes image data in the unit of 12 bit. You can determine the pixel format (8 bits, 10 bits or 12
bits) of these image data transmitted from the camera by selecting the Pixel Format parameter. When the
camera is set for 8 bit or 10 bit pixel format, the four or two least significant bits will be dropped from overall 12
bits.
Figure 9.3 Pixel Format
The XML parameter related to Pixel Format is as follows.
XML Parameter
Description
ImageFormatControl
PixelFormat
Sets the pixel format supported by the device.
Table 9.6 XML Parameter related to Pixel Format
The available pixel formats on the monochrome and color cameras are as follows.
Mono Sensor
Color Sensor
Mono 8
Mono 10
Mono 12
Mono 8
Mono 10
Mono 12
Bayer RG 8
Bayer RG 10
Bayer RG 12
Table 9.7 Pixel Format Values
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9.4 Data ROI (Color Camera)
The Balance White Auto feature provided by the color camera uses the pixel data from a Data Region of
Interest (ROI) to adjust the related parameters. The XML parameters related to Data ROI are as follows.
XML Parameters
Value
Description
DataRoiControl
RoiSelector
WhiteBalanceAuto
Selects a Data ROI used for Balance White Auto.
Only available on the color camera
RoiOffsetX
-
X coordinate of start point ROI
RoiOffsetY
-
Y coordinate of start point ROI
RoiWidth
-
Width of ROI
RoiHeight
-
Height of ROI
Table 9.8 XML Parameters related to Data ROI
Only the pixel data from the area of overlap between the data ROI by your settings and the Image ROI will be
effective if you use Image ROI and Data ROI at the same time. The effective ROI is determined as shown in the
figure below.
Figure 9.4 Effective Data ROI
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9.5 White Balance (Color Camera)
The color camera includes the white balance capability to adjust the color balance of the images transmitted
from the camera. With the white balancing scheme used on the VP-101MX and VP-151MX cameras, the Red,
Green and Blue intensities can be adjusted individually. You can set the intensity of each color by using the
Balance Ratio parameter. The Balance Ratio value can range from 1.0 to 4.0. If the Balance Ratio parameter is
set to 1.0 for a color, the intensity of the color will be unaffected by the white balance mechanism. If the Balance
Ratio parameter is set to greater than 1.0, the intensity of the color will be proportionally increased to the ratio.
For example, if the Balance Ratio is set to 1.5, the intensity of that color will be increased by 50%.
The XML parameters related to White Balance are as follows.
XML Parameters
Value
Description
AnalogControl
BalanceRatioSelector
Red
A Balance Ratio value will be applied to red pixels.
Green
A Balance Ratio value will be applied to green
pixels.
Blue
A Balance Ratio value will be applied to blue pixels.
BalanceRatio
×1.0 ~ ×4.0
Adjusts the ratio of the selected color.
Table 9.9 XML Parameters related to White Balance
9.5.1 Balance White Auto
The Balance White Auto feature is implemented on the color camera. It will control the white balance of the
image acquired from the color camera according to the GreyWorld algorithm. Before using the Balance White
Auto feature, you need to set the Data ROI for Balance White Auto. If you do not set the related Data ROI, the
pixel data from the Image ROI will be used to control the white balance. As soon as the Balance White Auto
parameter is set to Once, the Balance Ratio values for Red and Blue will be automatically adjusted to adjust the
white balance by referring to Green. The XML parameters related to Balance White Auto are as follows.
XML Parameter
Value
Description
AnalogControl
BalanceWhiteAuto
Off
Balance White Auto Off
Once
White Balance is adjusted once and then Off.
Table 9.10 XML Parameter related to Balance White Auto
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9.6 Gain and Black Level
Increasing the Gain parameter increases all pixel values of the image. This results in a higher grey value output
from the camera for a given amount of output from the image sensor.
1. Selects the Gain Control (Digital All is only available) to adjust by using the Gain Selector parameter.
2. Sets the Gain parameter to the desired value.
Adjusting the Black Level parameter will result in an offset to the pixel values output from the camera.
1. Selects the Black Level Control (Digital All is only available) to adjust by using the Black Level Selector
parameter.
2. Sets the Black Level parameter to the desired value. The available setting range varies depending on the
Pixel Format settings.
The XML parameters related to Gain and Black Level are as follows.
XML Parameters
Value
Description
AnalogControl
GainSelector
DigitalAll
Applies the Gain value to all digital channels.
Gain
1.0× ~ 32.0×
Sets a digital gain value.
BlackLevelSelector
DigitalAll
Applies the Black Level value to all digital channels.
BlackLevel
0 ~ 255
Sets a black level value.
Table 9.11 XML Parameters related to Gain and Black Level
9.7 Hot Pixel Correction
When you acquire images with long exposure times or operate the camera under the condition of high ambient
temperature, hot pixels may be appeared on the images due to the characteristics of the high resolution CMOS
image sensor. The VP-101MX and VP-151MX cameras provide the Hot Pixel Correction feature to remove hot
pixels.
The XML parameter related to Hot Pixel Correction is as follows.
XML Parameters
Value
Description
DSNUControl
HotPixelCorrection
Off
Disables the Hot Pixel Correction feature.
On
Enables the Hot Pixel Correction feature.
Table 9.12 XML Parameter related to Hot Pixel Correction
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9.8 Dynamic Defective Pixel Correction
When you acquire images with the Defective Pixel Correction feature (refer to 9.9 Defective Pixel Correction)
enabled, some pixels may appear brighter or darker than the other pixels due to long exposure times, high gain
settings or high operating temperatures. The VP-101MX and VP-151MX cameras provide the Dynamic
Defective Pixel Correction feature to remove these defect pixels. If you set the Dynamic Defective Pixel
Correction parameter to TRUE, pixels considerably brighter or darker than adjacent pixels will be replaced with
the Median value of adjacent 3 × 3 pixels. You can adjust the range of defect pixel values to be replaced with
the Median value by setting the Defective Pixel Offset Threshold parameter.
The XML parameters related to Dynamic Defective Pixel Correction are as follows.
XML Parameters
Value
Description
ImageFormatControl
DynamicDefectivePixel
Correction
FALSE
Disables the Dynamic DPC feature.
TRUE
Enables the Dynamic DPC feature.
DefectivePixel
OffsetThreshold
0 ~ 2048
(at 12 bit)
Sets the Threshold Offset value of the Median
filter. You can adjust the range of defect pixel
values by setting this value.
Table 9.13 XML Parameters related to Dynamic Defective Pixel Correction
The range of defect pixel values can be determined by ±20% of adjacent 3 × 3 pixels’ average and ±Offset
Threshold values.
Figure 9.5 Dynamic Defective Pixel Correction
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9.9 Defective Pixel Correction
The CMOS sensor may have defect pixels which cannot properly react to the light. Correction is required since it
may deteriorate the quality of output image. Defect pixel information of CMOS used for each camera is entered
into the camera during the manufacturing process. If you want to add defect pixel information, it is required to
enter coordinate of new defect pixel into the camera. For more information, refer to Appendix A.
9.9.1 Correction Method
A correction value for a defect pixel is calculated based on the valid pixel value adjacent in the same line.
Figure 9.6 Location of Defect Pixel to be corrected
If the Current Pixel is a defect pixel as shown in the figure above, the correction value for this pixel is obtained as
shown in the following table depending on whether surrounding pixels are defect pixels or not.
Adjacent Defect Pixel (s)
Correction Value of Current Pixel
None
(L1 + R1) / 2
L1
R1
R1
L1
L1, R1
(L2 + R2) / 2
L1, R1, R2
L2
L2, L1, R1
R2
L2, L1, R1, R2
(L3 + R3) / 2
L2, L1, R1, R2, R3
L3
L3, L2, L1, R1, R2
R3
Table 9.14 Calculation of Defect Pixel Correction Value
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9.10 Flat Field Correction
The Flat Field Correction feature improves the image uniformity when you acquire a non-uniformity image due to
external conditions. The Flat Field Correction feature of the VP-101MX and VP-151MX cameras can be
summarized by the following equation:
IC = IR / IF
IC: Level value of corrected image
IR: Level value of original image
IF: Level value of Flat Field data
In actual use conditions, generate a Flat Field correction data and then save the data into the non-volatile
memory of the camera by following the procedures below.
1. Choose an active Flat Field data location by using the Flat Field Data Selector parameter.
2. Execute the Flat Field Data Generate parameter.
After executing the Flat Field Data Generate parameter, you must acquire one image to generate the
scaled down Flat Field correction data.
3. Execute the Flat Field Data Save parameter to save the generated Flat Field data into the non-volatile
memory. When the scaled down Flat Field data are used for correction, they are expanded and applied with
a Bilinear Interpolation as shown in the Figure 9.8.
To ignore the generated Flat Field correction data and use the previous Flat Field correction data,
execute the Flat Field Data Load parameter before executing the Flat Field Data Save parameter.
4. Set the Flat Field Correction parameter to On to apply the Flat Field data to the camera.
It is recommended that you enable the Defective Pixel Correction feature before
executing the Flat Field Data Generate parameter.
Before executing the Flat Field Data Generate parameter, you must set the camera as
follows:
OffsetX, Y: 0
Width, Height: Maximum values
After executing an Acquisition Start command, you need to operate the camera with
free-run mode or apply a trigger signal to acquire an image.
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Figure 9.7 Generation and Application of Flat Field Data
Figure 9.8 Bilinear Interpolated Magnification
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The XML parameters related to Flat Field Correction are as follows.
XML Parameters
Value
Description
FlatFieldControl
FlatFieldCorrection
Off
Disables the Flat Field Correction feature.
On
Enables the Flat Field Correction feature.
FlatFieldDataSelector
Space0 ~ Space15
Selects a location to save Flat Field data
to or load Flat Field data from.
Space0~Space15: User defined
location
FlatFieldDataGenerate
-
Generates the Flat Field data.
FlatFieldDataSave
-
Saves the generated Flat Field correction
data in the non-volatile memory.
The generated data by executing the
Flat Field Data Generate parameter
are saved in the volatile memory so
that the data are lost if the camera is
reset or if power is turned off. To use
the data after the camera is powered
on or reset, save them in the non-
volatile memory.
FlatFieldDataLoad
-
Loads the Flat Field data from the non-
volatile memory into volatile memory.
Table 9.15 XML Parameters related to Flat Field Correction
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9.10.1 Flat Field Data Selector
As mentioned above, the generated Flat Field correction data is stored in the camera’s volatile memory and the
data is lost if the camera is reset or powered off. To use the generated Flat Field correction data after the camera
is powered on or reset, you need to save them in the camera’s non-volatile memory. The VP-101MX and VP-
151MX cameras provide sixteen reserved locations in the camera’s non-volatile memory available for saving and
loading the Flat Field correction data. You can use the Flat Field Data Selector parameter to select a location
as desired.
Figure 9.9 Flat Field Data Selector
Saving Flat Field Data
There is a one-to-one correspondence between active Flat Field data locations in the volatile memory and Flat
Field data storage locations in the non-volatile memory. In order to save the generated Flat Field data into a
reserved location in the camera’s flash memory, you must choose a Flat Field data location before generating
Flat Field data by using the Flat Field Data Selector parameter.
1. Use the Flat Field Data Selector parameter to specify a Flat Field data location, and then generate Flat
Field data.
2. Execute the Flat Field Data Save parameter to save the generated Flat Field data to the selected location.
Loading Flat Field Data
If you saved Flat Field data into the camera’s non-volatile memory, you can load the saved Flat Field data from
the camera’s non-volatile memory into the camera’s active Flat Field correction data location.
1. Use the Flat Field Data Selector parameter to specify the desired Flat Field data storage location. The Flat
Field correction data will be applied when the Flat Field Correction feature is enabled on the camera.
2. To ignore newly generated Flat Field correction data and load the previous Flat Field correction data,
execute the Flat Field Data Load parameter.
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9.11 Digital I/O Control
The control I/O receptacle of the camera can be operated in various modes.
The XML parameters related to Digital I/O Control are as follows.
XML Parameters
Value
Description
DigitalIOControl
LineSelector
Line1
Selects the number 4 pin of the camera’s control I/O
receptacle as an output line.
LineInverter
FALSE
Disables inversion on the output signal of the line.
TRUE
Enables inversion on the output signal of the line.
LineSource
Off
Disables the line output.
ExposureActive
Outputs pulse signals indicating the current
exposure time.
FrameActive
Outputs pulse signals indicating a frame readout
time.
UserOutput0
Outputs pulse signals set by User Output Value.
Timer0Active
Outputs user-defined Timer signals as pulse signals.
Strobe
Outputs strobe signals (goes high when the
exposure time for the bottom line of pixels begins
and goes low when the exposure time for the top
line of pixels ends) as pulse signals.
UserOutputValue
FALSE
Sets the bit state of the line to Low.
TRUE
Sets the bit state of the line to High.
DebounceTime
0 ~ 1,000,000
Sets a Debounce time value in microseconds
(Default: 0.5 ㎲).
Table 9.16 XML Parameters related to Digital I/O Control
When you set the Line Source to User Output0, you can use the user setting values as output signals.
Figure 9.10 User Output
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The camera can provide an Exposure Active output signal. The signal goes high when the exposure time for
each frame acquisition begins and goes low when the exposure time ends as shown in the figure below. This
signal can be used as a flash trigger and is also useful when you are operating a system where either the
camera or the object being imaged is movable. Typically, you do not want the camera to move during exposure.
You can monitor the Exposure Active signal to know when exposure is taking place and thus know when to avoid
moving the camera.
Figure 9.11 Exposure Active Signal
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9.11.1 Strobe
When the Line Source parameter is set to Strobe, the camera can output Strobe signals. Typically, the strobe
signal goes high when the exposure time begins and goes low when the exposure time ends. This signal can be
used as a flash trigger and is also useful when you are operating a system where either the camera or the object
being imaged is movable. Typically, you do not want the camera to move during exposure. You can monitor the
Strobe signal to know when exposure is taking place and thus know when to avoid moving the camera.
The VP-101MX and VP-151MX cameras provide the Strobe signal as shown in the figure below. The Strobe
signal goes high when the exposure time for the bottom line of pixels begins and goes low when the exposure
time for the top line of pixels ends. The Strobe signal is only available when the exposure time is longer than the
readout time and is useful when you are operating the camera under the flash lighting conditions.
Figure 9.12 Strobe Signal
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9.11.2 Debounce
The Debounce feature of the VP-101MX and VP-151MX cameras allows to supply only valid signals to the
camera by discriminating between valid and invalid input signals. The Debounce Time parameter specifies the
minimum time that an input signal must remain High or Low in order to be considered as a valid input signal.
When you use the Debounce feature, be aware that there is a delay between the point where the valid input
signal arrives and the point where the signal becomes effective. The duration of the delay is determined by the
Debounce Time parameter setting value. When you set the Debounce Time parameter, High and Low signals
shorter than the setting value are considered invalid and ignored as shown in the figure below.
Figure 9.13 Debounce
The XML parameter related to Debounce Time is as follows.
XML Parameters
Value
Description
DigitalIOControl
Debounce Time
0 – 1,000,000 ㎲
Sets a Debounce Time value in microseconds
(Default: 0.5 ㎲).
Table 9.17 XML Parameter related to Debounce Time
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9.12 Timer Control
When the Line Source parameter is set to Timer0Active, the camera can provide output signals by using the
Timer. On the VP-101MX and VP-151MX cameras, the Frame Active, Exposure Active event, Strobe or external
trigger signal is available as Timer source signal.
The XML parameters related to Timer are as follows.
XML Parameters
Value
Description
CounterAnd
TimerControl
TimerDuration
0 ~ 60,000,000 ㎲
Sets the duration of the Timer output signal to
be used when Timer Trigger Activation is set
to Rising/Falling Edge.
TimerDelay
0 ~ 60,000,000 ㎲
Sets the delay time to be applied before
starting the Timer.
TimerReset
-
Resets the Timer and starts it again.
TimerTriggerSource
Off
Disables the Timer trigger.
ExposureActive
Sets the Timer to use the current exposure
time as the source signal.
FrameActive
Sets the Timer to use a frame readout time as
the source signal.
Line0
Sets the Timer to use the external trigger
signal as the source signal.
Strobe
Sets the Timer to use the Strobe signal as the
source signal.
TimerTriggerActivation
RisingEdge
Specifies that a rising edge of the selected
trigger signal will act as the Timer trigger.
FallingEdge
Specifies that a falling edge of the selected
trigger signal will act as the Timer trigger.
LevelHigh
Specifies that the Timer output signal will be
valid as long as the selected trigger signal is
High.
LevelLow
Specifies that the Timer output signal will be
valid as long as the selected trigger signal is
Low.
Table 9.18 XML Parameters related to Timer Control
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For example, when the Timer Trigger Source is set to Exposure Active and the Timer Trigger Activation is set to
Level High, the Timer will act as follows:
1. When the source signals set by the Timer Trigger Source parameter are applied, the Timer will start
operations.
2. The delay set by the Timer Delay parameter begins to expire.
3. When the delay expires, the Timer signal goes high as long as the source signal is high.
Figure 9.14 Timer Signal
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9.13 Cooling Control
A fan is installed on the rear panel of the camera to radiate heat. You can set the fan to turn on or off. You can
also set the fan to turn on when a specified internal temperature is reached.
The XML parameters related to Cooling Control are as follows.
XML Parameters
Value
Description
CoolingControl
TargetTemperature
-10℃ ~ 80℃
Sets the temperature to operate the
Thermoelectric Peltier when the Peltier Operation
Mode parameter is set to On.
FanOperationMode
Off
Turns off the fan.
On
Turns on the fan.
FanSpeed
-
Displays the current Fan RPM.
PeltierOperationMode
Off
Turns off the Thermoelectric Peltier.
On
Turns on the Thermoelectric Peltier when the
internal temperature exceeds the value set in the
Target Temperature parameter.
Table 9.19 XML Parameters related to Cooling Control
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9.14 Temperature Monitor
The camera has an embedded sensor chip to monitor the internal temperature.
The XML parameters related to Device Temperature are as follows.
XML Parameters
Value
Description
DeviceControl
DeviceTemperatureSelector
Sensor
Sets a temperature measuring spot to the image
sensor.
Mainboard
Sets a temperature measuring spot to the
mainboard.
DeviceTemperature
-
Displays device temperature in Celsius.
Table 9.20 XML Parameters related to Device Temperature
9.15 Status LED
A LED is installed on the rear panel of the camera to inform the operation status of the camera. LED status and
corresponding camera status are as follows:
Steady Red: The camera is not initialized.
Slow Flashing Red: A CXP Link is not configured.
Fast Flashing Orange: The camera is checking a CXP Link configuration.
Steady Green: A CXP Link is configured.
Fast Flashing Green: The camera is transmitting image data.
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9.16 Test Pattern
To check whether the camera operates normally or not, it can be set to output test patterns generated in the
camera, instead of image data from the image sensor. Three types of test patterns are available; image with
different value in horizontal direction (Grey Horizontal Ramp), image with different value in diagonal direction
(Grey Diagonal Ramp) and moving image with different value in diagonal direction (Grey Diagonal Ramp
Moving).
The XML parameter related to Test Pattern is as follows.
XML Parameters
Value
Description
ImageFormatControl
TestPattern
Off
Disables the Test Pattern feature.
GreyHorizontalRamp
Sets to Grey Horizontal Ramp.
GreyDiagonalRamp
Sets to Grey Diagonal Ramp.
GreyDiagonalRampMoving
Sets to Grey Diagonal Ramp Moving.
SensorSpecific
Sets to the Test Pattern provided by the
image sensor.
Table 9.21 XML Parameters related to Test Pattern
Figure 9.15 Grey Horizontal Ramp
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Figure 9.16 Grey Diagonal Ramp
Figure 9.17 Grey Diagonal Ramp Moving
The test pattern may look different because the region of the test pattern may vary depending
on the camera’s resolution.
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9.17 Reverse X
The Reverse X feature lets you flip images horizontally. This feature is available in all operation modes of the
camera. The XML parameter related to Reverse X is as follows.
XML Parameters
Value
Description
ImageFormatControl
ReverseX
FALSE
Disables the Reverse X feature.
TRUE
Flips images horizontally.
Table 9.22 XML Parameter related to Reverse X
Figure 9.18 Original Image
Figure 9.19 Reverse X Image
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9.18 Device User ID
You can input user defined information up to 16 bytes.
The XML parameter related to Device User ID is as follows.
XML Parameters
Description
DeviceControl
DeviceUserID
Input user defined information (16 bytes).
Table 9.23 XML Parameter related to Device User ID
9.19 Device Reset
Resets the camera physically to power off and on. You must configure a link again because the camera will be
released from the link between the camera and CXP Frame Grabber after reset.
The XML parameter related to Device Reset is as follows.
XML Parameters
Description
DeviceControl
DeviceReset
Resets the camera physically.
Table 9.24 XML Parameter related to Device Reset
9.20 Field Upgrade
The camera provides a feature to upgrade the Firmware and FPGA logic through the CoaXPress interface rather
than disassemble the camera in the field. Refer to Appendix B for more details about how to upgrade.
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9.21 User Set Control
You can save the current camera settings to the camera’s internal Flash memory. You can also load the camera
settings from the camera’s internal Flash memory. The camera provides two setups to save and three setups to
load settings. The XML parameters related to User Set Control are as follows.
XML Parameters
Value
Description
UserSetControl
UserSetSelector
Default
Selects the Factory Default settings.
UserSet1
Selects the UserSet1 settings.
UserSet2
Selects the UserSet2 settings.
UserSetLoad
-
Loads the User Set specified by User Set Selector
to the camera.
UserSetSave
-
Saves the current settings to the User Set
specified by User Set Selector.
The Default is a Factory Default Settings and
allowed to load only.
UserSetDefault
Default
Applies the Factory Default settings when reset.
UserSet1
Applies the UserSet1 settings when reset.
UserSet2
Applies the UserSet2 settings when reset.
Table 9.25 XML Parameters related to User Set Control
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The camera settings stored in the Default can be loaded into the camera’s workspace, but cannot be changed.
The settings set in the workspace will be lost if the camera is reset or powered off. To use the current setting
values in the workspace after a reset, you must save the settings to one of the user spaces.
Figure 9.20 User Set Control
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9.22 Sequencer Control
The Sequencer Control provided by the VP-101MX and VP-151MX cameras allows you to apply different sets of
parameter settings, called ‘Sequencer Set’, to a sequence of image acquisitions. As the camera acquires
images, it applies one Sequencer Set after the other. This allows the camera to respond quickly to changing
imaging requirements. For example, changes in illumination conditions influence the imaging requirements.
With the User Set Control feature, you can save user defined Sequencer Sets in the camera’s non-volatile
memory. Then after the camera is powered on or reset, the Sequencer Sets are available according to the User
Set Default parameter. Each Sequencer Set is identified by an index number ranging from 0 to 31. Accordingly,
you can define up to 32 different Sequencer Sets.
On the VP-101MX and VP-151MX cameras, only the Flat Field correction data can be configured for Sequencer
Sets. The XML parameters related to Sequencer Sets are as follows.
XML Parameters
Value
Description
SequencerControl
SequencerMode
Off
Disables the Sequencer.
On
Enables the Sequencer.
SequencerConfigurationMode
Off
Disables the Sequencer Configuration Mode.
On
Enables the Sequencer Configuration Mode.
SequencerSetSelector
0 ~ 31
Selects an index number of a Sequencer Set
to be configured.
SequencerSetActive
-
Displays the index number (0 ~ 31) of the
Sequencer Set that is currently active.
SequencerSetCount
1 ~ 32
Sets the number of Sequencer Sets to be
applied.
SequencerReset
-
Returns to Sequencer Set 0.
Table 9.26 XML Parameters related to Sequencer Control
To apply Sequencer Sets, you must set the Trigger Mode parameter to On.
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Use Case – Applying Four Different Flat Field Correction Data to Sequencer Sets
For example, assume that four different Flat Field correction data optimized for White, Green, Red and Blue
pixels are applied to four different Sequencer Sets to inspect LCD panels.
1. Set the Sequencer Mode parameter to Off.
2. Set the Sequencer Configuration Mode parameter to On.
3. Set the Sequencer Set Selector parameter to 0 and set the Flat Field Data Selector parameter to 0.
Then, set the Sequencer Set Selector parameter to 1, 2 and 3, and then set the Flat Field Data Selector
parameter to 1, 2 and 3 respectively.
4. Set the Sequencer Set Count parameter to 4.
5. Set the Sequencer Configuration Mode parameter to Off, and then set the Sequencer Mode parameter
to On.
Figure 9.21 Sequencer Diagram (Use Case)
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You can save the user defined Sequencer Sets in the camera’s non-volatile memory by
using the User Set Control feature. For more information, refer to 9.21 User Set Control.
Executing the Sequencer Reset parameter allows to return to the Sequencer Set 0
status at any time while cycling through the Sequencer.
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10 Troubleshooting
When you have a problem with a Vieworks camera, please check the following:
If no image is displayed on your computer,
Ensure that all the cable connections are secure.
Ensure that the power supply is properly connected.
Ensure that trigger signal is applied correctly when you set the Trigger Mode parameter to On.
If images are not clear,
Ensure the camera lens or glass is clean.
Check the lens aperture is adjusted properly.
If images are dark,
Ensure your camera lens is not blocked.
Check the exposure time is set properly.
Check the aperture is opened properly.
Check the Gain value is not set to small.
If you identify abnormal operation or overheating sign,
Ensure that power supply is properly connected.
Stop using the camera when you notice smoke or abnormal overheating.
If you have a problem using the Trigger Mode,
Ensure that the Software trigger related parameters are configured correctly.
Ensure that the trigger related parameters on you CXP Frame Grabber are configured correctly when
you set the Trigger Source parameter to CXPin.
Ensure that cable connections are secure when you set the Trigger Source parameter to Line0.
If there is communication failure between the camera and computer,
Ensure coax cables are connected properly.
Ensure that you have configured a CXP Frame Grabber in your computer correctly and the camera is
connected properly to the CXP Frame Grabber.
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Appendix A Defective Pixel Map Download
1. Create the Defective Pixel Map data in Microsoft Excel format as shown in the left picture below and save
as a CSV file (*.csv). The picture in the right shows the created Excel file opened in Notepad. The following
rules need to be applied when creating the file.
Lines beginning with ‘:’ or ‘—’ are treated as notes.
You must enter the horizontal value first and then vertical value for coordinates of each defect pixel.
Coordinate values for each pixel can be placed in any order.
2. Run Vieworks Imaging Solution 7.X and click the Configure button to display the window as shown below.
Select the Defect tab, click the File Path button, search and select the defective pixel map (*.csv), and then
click the Download button.
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3. Once the download is complete, the saving process will begin. During the saving process, make sure not to
disconnect the power cord.
4. After completing the download, click the OK button to close the confirmation.
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Appendix B Field Upgrade
You can upgrade the MCU, FPGA and XML file of the camera by following the procedures below.
1. Run Vieworks Imaging Solution 7.X and click the Configure button to display the window as shown below.
2. Select the PKG tab, click the File Path button, search and select the MCU, FPGA or XML upgrade file, and
then click the Download button.
3. The camera begins downloading the upgrade file and the downloading status is displayed at the bottom of
the window.
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