VC CXP series
Version
Date
Description
1.0
2014-10-31
Initial Release
1.1
2015-05-14
Corrected errors on the mechanical dimension
1.2
2015-12-11
Added VC-4MX-144
1.3
2016-05-31
Revised typical power requirements
Added the Binning feature (VC-25MX)
Added the DSNU and PRNU features (VC-25MX)
1.4
2017-03-24
Updated the EMC Directive
1.5
2018-01-26
Removed VC-4MX-144
Revision History
Page 2 of 76 RA14-14A-022
VC CXP series
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 Components ...................................................................................................... 8
5 Product Specifications ..................................................................................................... 9
5.1 Overview ......................................................................................................................... 9
5.2 Specifications ................................................................................................................ 10
5.3 Camera Block Diagram .................................................................................................. 11
5.4 Sensor Information ........................................................................................................ 12
5.5 Mechanical Specification ............................................................................................... 14
6 Installation ................................ ................................ ....................................................... 16
6.1 Precaution to Center the Image Sensor ......................................................................... 17
6.2 Precaution about Blurring Compared to Center ............................................................. 17
6.3 Installing Vieworks Imaging Solution .............................................................................. 17
7 Camera Interface ............................................................................................................. 18
7.1 General Description ....................................................................................................... 18
7.2 CoaXPress Connector ................................................................................................... 19
7.2.1 CoaXPress BNC Connector (75 Ω BNC Receptacle) .................................................................... 19
7.2.2 CoaXPress DIN Connector (75 Ω 1.0/2.3 DIN Receptacle) ........................................................... 19
7.3 Power Input Receptacle................................................................................................. 21
7.4 Control I/O Receptacle .................................................................................................. 22
7.5 Trigger Input Circuit ....................................................................................................... 23
7.6 Strobe Output Circuit ..................................................................................................... 24
8 Acquisition Control ......................................................................................................... 25
8.1 Overview ....................................................................................................................... 25
8.2 Acquisition Start/Stop Commands and Acquisition Mode ............................................... 28
8.3 Exposure Start Trigger ................................................................................................... 29
8.3.1 Trigger Mode .................................................................................................................................. 29
8.3.2 Using a CoaXPress Trigger Signal ................................................................................................. 31
8.3.3 Using an External Trigger Signal .................................................................................................... 32
8.4 Setting the Exposure Time ............................................................................................. 35
8.5 Overlapping Exposure with Sensor Readout ................................................................. 36
Page 3 of 76 RA14-14A-022
VC CXP series
8.6 Real Exposure (VC-12MX Only) .................................................................................... 38
8.6.1 Timed Exposure Mode .................................................................................................................... 38
8.6.2 Trigger Width Exposure Mode ........................................................................................................ 39
8.7 Electronic Shutter Operation .......................................................................................... 40
8.7.1 Global Shutter ................................................................................................................................. 40
8.8 Maximum Allowed Frame Rate ...................................................................................... 41
8.8.1 Increasing the Maximum Allowed Frame Rate ............................................................................... 41
9 Camera Features ............................................................................................................. 42
9.1 Image Region of Interest ............................................................................................... 42
9.2 Binning (VC-25MX Only) ............................................................................................... 45
9.3 CXP Link Configuration ................................................................................................ . 47
9.4 Pixel Format .................................................................................................................. 48
9.5 Data ROI (Color Camera) .............................................................................................. 49
9.6 White Balance (Color Camera) ................................................................ ...................... 50
9.6.1 Balance White Auto ........................................................................................................................ 50
9.7 Gain and Black Level ..................................................................................................... 51
9.8 Defective Pixel Correction ............................................................................................. 52
9.8.1 Correction Method .......................................................................................................................... 52
9.9 Flat Field Correction ...................................................................................................... 53
9.10 Dark Signal Non-Uniformity Correction (VC-25MX Only) ............................................... 56
9.10.1 Generating and Saving User DSNU Correction Values ................................................................. 57
9.11 Photo Response Non-Uniformity Correction (VC-25MX Only) ....................................... 58
9.11.1 Generating and Saving User PRNU Correction Values ................................................................. 59
9.12 High Dynamic Range (VC-12MX Monochrome Only) .................................................... 60
9.13 Temperature Monitor ..................................................................................................... 61
9.14 Status LED .................................................................................................................... 61
9.15 Test Pattern ................................ ................................................................ ................... 62
9.16 Digital IO Control ........................................................................................................... 65
9.17 Fan Control.................................................................................................................... 67
9.18 Device User ID .............................................................................................................. 67
9.19 Device Reset ................................................................................................................. 67
9.20 User Set Control ............................................................................................................ 68
9.21 Field Upgrade ................................................................................................................ 68
10 Troubleshooting .............................................................................................................. 69
Page 4 of 76 RA14-14A-022
VC CXP series
Appendix A Defect Pixel Map Download ........................................................................ 70
Appendix B Field Upgrade ............................................................................................... 72
B.1 MCU .............................................................................................................................. 72
B.2 FPGA ............................................................................................................................ 74
B.3 XML ............................................................................................................................... 75
Page 5 of 76 RA14-14A-022
VC CXP series
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.
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.
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 devices.
Make sure the power is turned off before connecting the power cord to the camera.
Otherwise, damage to the camera may result.
1 Precautions
General
Installation and Maintenance
Power Supply
Page 6 of 76 RA14-14A-022
VC CXP series
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.
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
Page 7 of 76 RA14-14A-022
VC CXP series
Package Components
M5 Set Screws for Tilt Adjustment (Provided only with F-mount camera)
You can adjust the tilt using the M5 set screws, however it is not recommended since 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.
4 Package Components
Page 8 of 76 RA14-14A-022
VC CXP series
5 Product Specifications
5.1 Overview
VC CXP series is a high speed industrial area scan camera equipped with the latest CMOS image sensor. With
new CoaXPress interface, customers in the industrial market can take advantage of common coax cabling to
transmit full resolution images at up to 25 Gbps. Supplying power to the camera over the coax cable is also
available via Power over CoaXPress (PoCXP). With its high reliability and durability, these cameras are best
suitable for applications requiring high speed continuous shooting.
Main Features
High Speed 12/25 Megapixel CMOS Image Sensor
Electronic Exposure Time Control (Global Shutter)
Output Pixel Format
VC-12MX: 8 bit
VC-25MX: 8 / 10 bit
Strobe Output
Output Channel
VC-12MX: CXP6 1ch, CXP6 2ch, CXP6 4ch
VC-25MX: CXP6 2ch, CXP6 4ch
Gain/Black Level Control
Test Pattern
Temperature Monitor
Field Upgrade
Image Correction
Flat Field Correction
Defective Pixel Correction
Fan Control
VC CXP Series Feature Bar
VC-12MX/VC-25MX:
Page 9 of 76 RA14-14A-022
VC CXP series
VC CXP Series
VC-12MX-180
VC-25MX-72
Active Image (H × V)
4096 × 3072
5120 × 5120
Sensor Type
CMOSIS CMV 12000
On Semiconductor VITA-25K
Pixel Size
5.5 ㎛ × 5.5 ㎛
4.5 ㎛ × 4.5 ㎛
Optical Size (Diagonal)
APS-like (28.14 ㎜)
35 ㎜ (32.58 ㎜)
Output
Format
Mono
Mono 8
Mono 8, Mono 10
Color
Bayer 8
Bayer 8, Bayer 10
Camera Interface
CoaXPress
Electronic Shutter
Global Shutter
Max. Frame Rate at Full
Resolution
181 fps at 6.25 Gbps with 4 CH
72 fps at 6.25 Gbps with 4 CH
Dynamic Range
54 ㏈
Shutter Speed (1 ㎲ step)
43 ㎲ ~ 60 s
1 ㎲ ~ 60 s
Partial Scan (Max. Speed)
11494 fps at 4 Lines
7692 fps at 4 Lines (H: 256)
Black Level (1 LSB step)
0 ~ 16 LSB at 8 bit, 0 ~ 64 LSB at 10 bit
Video Gain
×1 ~ ×4 (0~ 12 ㏈)
Exposure Mode
Free Run, Timed, Trigger Width
External Trigger
3.3 V ~ 24.0 V, 10 ㎃, Logical Level Input
optically isolated, CoaXPress Control Port
Software Trigger
Asynchronous, Programmable via Camera API
API SDK
Vieworks Imaging Solution 7.X
Lens Mount
F-mount
Power
Adapter
10 ~ 38V DC, Typ. 12 W
10 ~ 38V DC, Typ. 10.5W
PoCXP
24 V DC, Minimum of two PoCXP cables required
Environmental
Operating: -5℃ ~ 40℃, Storage : -40℃ ~ 70℃
Mechanical
80×80×101 ㎜ 620g (with F-mount)
80×80×101 ㎜ 630g (with F-mount)
5.2 Specifications
Technical specifications for VC CXP series are as follows:
Table 5.1 Specifications of VC CXP Series (VC-12MX-180/VC-25MX-72)
Page 10 of 76 RA14-14A-022
VC CXP series
5.3 Camera Block Diagram
Figure 5.1 VC-12MX/25MX Camera Block Diagram
All controls and data processing of the camera 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 sensor and then transmits data through the CoaXPress interface. And
also, the Processing & Control Logic controls the trigger input and strobe output signals which are sensitive to
time. Furthermore, a DDR3 for the frame buffer to process images and a Flash for operating Micro-Controller are
installed outside FPGA.
Page 11 of 76 RA14-14A-022
VC CXP series
5.4 Sensor Information
The following graph shows the spectral response for VC-12MX monochrome and color camera.
Figure 5.2 Mono and Color Spectral Response for VC-12MX
Page 12 of 76 RA14-14A-022
VC CXP series
The following graph shows the spectral response for VC-25MX monochrome and color camera.
Figure 5.3 Mono and Color Spectral Response for VC-25MX
Page 13 of 76 RA14-14A-022
VC CXP series
5.5 Mechanical Specification
The camera dimensions in millimeters are as shown in the following figure.
Figure 5.4 Mechanical Dimensions for VC-12MX/25MX F-mount with BNC-type Connectors
Page 14 of 76 RA14-14A-022
VC CXP series
Figure 5.5 Mechanical Dimensions for VC-12MX/25MX F-mount with DIN 1.0/2.3-type Connectors
Page 15 of 76 RA14-14A-022
VC CXP series
To configure a link between a camera and CXP Frame Grabber by using a single coax
cable, you must connect the CH1 of the CXP connector on the camera to the CH1 of the
CXP Frame Grabber. At this time, you must use a power supply to power the camera.
To power a camera via PoCXP Frame Grabber, you must connect both CH1 and CH2
channels of the camera to their respective connectors on the CXP Frame Grabber.
6 Installation
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.
Go on to step 2 if you are using a power supply.
Go on to step 3 if you are using a Power over CoaXPress (PoCXP) Frame Grabber.
2. If you are using a power supply:
a. 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 one 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.
b. Connect the plug of the power adapter to the 6-pin power input receptacle on the camera.
c. Plug the power adapter into a working electrical outlet.
3. If you are using PoCXP Frame Grabber:
a. 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 one 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.
b. You must connect both CH1 and CH2 channels to power the camera via PoCXP.
4. Verify all the cable connections are secure.
Precautions for using Power over CoaXPress
Page 16 of 76 RA14-14A-022
VC CXP series
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 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.
Page 17 of 76 RA14-14A-022
VC CXP series
①
②
③
④
④
7 Camera Interface
7.1 General Description
As shown in the figure below, 3 types of connectors and a status indicator LED are located on the back of
VC-12MX/25MX 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 (if PoCXP is not used).
③ 4 pin control receptacle: provides access to the camera’s I/O lines.
④ CoaXPress connector: controls video data and the camera.
Figure 7.1 VC-12MX/25MX with BNC-type Connectors
Figure 7.2 VC-12MX/25MX with DIN 1.0/2.3-type Connectors
Page 18 of 76 RA14-14A-022
VC CXP series
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. VC CXP cameras
can be powered over the cable if you are using a PoCXP enabled Frame Grabber.
7.2.1 CoaXPress BNC Connector (75 Ω BNC Receptacle)
Figure 7.3 CoaXPress BNC-type Connectors
7.2.2 CoaXPress DIN Connector (75 Ω 1.0/2.3 DIN Receptacle)
Figure 7.4 CoaXPress DIN 1.0/2.3-type Connectors
Page 19 of 76 RA14-14A-022
VC CXP series
Channel
Max. Bit Rate per Coax
Type
PoCXP Compliant
CH1
6.25 Gbps
Master Connection
Yes
CH2
6.25 Gbps
Extension Connection
Yes
CH3
6.25 Gbps
Extension Connection
No
CH4
6.25 Gbps
Extension Connection
No
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.
The CoaXPress connector on the VC CXP camera complies with the CoaXPress standard and the following
table shows the channel assignments.
Table 7.1 Channel Assignments for CoaXPress Connector
Page 20 of 76 RA14-14A-022
VC CXP series
Pin Number
Signal
Type
Description
1, 2, 3
+12V DC
Input
DC Power Input
4, 5, 6
DC Ground
Input
DC Ground
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.
1
2
3 4
5
6
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:
Figure 7.5 Pin Assignments for 6-pin Power Input Receptacle
Table 7.2 Pin Arrangements for Power Input Receptacle
The mating connector is a Hirose 6-pin plug (part # HR10A-7P-6S) or the equivalent connectors. The power
adapter is recommended to have at least 2 A current output at 12 V DC ±10% voltage output (Users need to
purchase a power adapter separately).
Precaution for Power Input
Page 21 of 76 RA14-14A-022
VC CXP series
1
2
4
3
Pin Number
Signal
Type
Description
1
Trigger Input +
Input - 2
Trigger Input -
Input - 3
DC Ground
-
DC Ground
4
Strobe Out
Output
3.3 V TTL Output
Output Resistance: 47Ω
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:
Figure 7.6 Pin Assignments for 4-pin Control I/O Receptacle
The mating connector is a Hirose 4-pin plug (part # HR10A-7P-4P) or the equivalent connectors.
Page 22 of 76 RA14-14A-022
Table 7.3 Pin Arrangements for Control I/O Receptacle
VC CXP series
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
7.5 Trigger Input Circuit
The following figures show the trigger signal input circuit of the 4-pin connector. Transmitted trigger signal is
applied to the internal circuit through a photo coupler. The minimum trigger width that can be recognized by the
camera is 1 ㎲. If transmitted trigger signal is less than 1 ㎲, the camera will ignore the trigger signal. An
external trigger circuit example is shown below.
Figure 7.7 Trigger Input Schematic
Page 23 of 76 RA14-14A-022
VC CXP series
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 -
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 the signal is
synchronized with an exposure (shutter) signal of the camera (refer to 9.16 Digital IO Control).
Figure 7.8 Strobe Output Schematic
Page 24 of 76 RA14-14A-022
VC CXP series
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.
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 the Acquisition Mode parameter
Exposure Start trigger
Exposure time control
Acquisition Start and Stop Commands and the 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. VC CXP 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.
Page 25 of 76 RA14-14A-022
VC CXP series
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
Page 26 of 76 RA14-14A-022
VC CXP series
Applying Trigger Signals
The paragraphs above mention "applying a trigger signal". There are two ways to apply an exposure start trigger
signal to the camera: via CXPin or via LineIn0 (commonly referred to as hardware).
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 LineIn0. 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. VC CXP cameras provide two exposure modes, 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 CoaXPress or 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.
Page 27 of 76 RA14-14A-022
VC CXP series
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.
VC CXP cameras only provide 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.
Page 28 of 76 RA14-14A-022
VC CXP series
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 is commonly referred as “free run”.
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 VC CXP camera. 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 CXPin or LineIn0. 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.
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.
Page 29 of 76 RA14-14A-022
VC CXP series
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:
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.
LineIn0: 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.
If the Trigger Source parameter is set to CXPin or LineIn0, you must also set the Trigger Activation
parameter. The available settings for the Trigger Activation parameter are:
Rising Edge: Specifies that a rising edge of the electrical signal will act as the exposure start trigger.
Falling Edge: Specifies that a falling edge of the electrical signal will act as the exposure start trigger.
Exposure Time Control with Trigger Mode = On
When the Trigger Mode parameter is set to On, the exposure time for each frame acquisition can be controlled
with the Exposure Time parameter or it can be controlled by manipulating the external trigger signal.
Page 30 of 76 RA14-14A-022
VC CXP series
8.3.2 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 50 ㎳ (0.05 s):
So in this case, the frame rate is 20 fps.
Page 31 of 76 RA14-14A-022
VC CXP series
8.3.3 Using an External Trigger Signal
If the Trigger Mode parameter is set to On and the Trigger Source parameter is set to LineIn0, an externally
generated electrical signal injected into the Control I/O Receptacle pin 1 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 50 ㎳ (0.05 s):
So in this case, the frame rate is 20 fps.
Page 32 of 76 RA14-14A-022
VC CXP series
8.3.3.1 Exposure Modes
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. Figure 8.2 illustrates timed exposure with the camera set for rising edge
triggering.
Figure 8.2 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 8.3 Trigger Overlapped with Timed Exposure Mode
Page 33 of 76 RA14-14A-022
VC CXP series
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. Figure 8.4 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 8.4 Trigger Width Exposure Mode
Page 34 of 76 RA14-14A-022
VC CXP series
Camera Model
Number of Channels
Minimum Exposure Time
Maximum Exposure Time†
VC-12MX
1 Channel
48 ㎲
60,000,000 ㎲
2 Channels
48 ㎲
60,000,000 ㎲
4 Channels
43 ㎲
60,000,000 ㎲
VC-25MX
2 Channels
1 ㎲
60,000,000 ㎲
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.
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 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
each camera model are shown in the following table.
Table 8.1 Minimum and Maximum Exposure Time Setting
Page 35 of 76 RA14-14A-022
VC CXP series
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 imaging 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, VC CXP cameras basically
operate with ‘overlapped’ exposure so that the exposure for a new frame can be overlapped with the sensor
readout for the previous frame.
When the Trigger Mode parameter is set to On, the exposure of a new frame begins while the camera is still
reading out the sensor data for the previously acquired frame. This situation is illustrated in Figure 8.5 with the
Trigger Source parameter set to LineIn0 and the Exposure Mode parameter set to Trigger Width.
Figure 8.5 Overlapped Exposure and Readout
Determining whether your camera is operating with overlapped exposure and readout is not a matter of issuing a
command or changing a setting. Rather a way that you operate the camera will determine whether the
exposures and readouts are overlapped or not. If we define the “Frame Period” as the time from the start of
exposure for one frame acquisition to the start of exposure for the next frame acquisition, then:
Overlapped: Frame Period ≤ Exposure Time + Readout Time
Page 36 of 76 RA14-14A-022
VC CXP series
Guidelines for Overlapped Exposure
Since VC CXP cameras operate with overlapped exposure, there are two important guidelines to keep in mind:
You must not begin the exposure time for a new image acquisition while the exposure time of the previous
acquisition is in progress.
You must not end the exposure time of the current image acquisition until readout of the previously acquired
image is complete.
When you are operating a camera with overlapped exposure and using an external trigger signal to trigger
image acquisition, you could use the camera’s Exposure Time parameter settings and timing formulas to
calculate when it is safe to begin each new acquisition.
Page 37 of 76 RA14-14A-022
VC CXP series
Camera Model
CXP Link Configuration
Offset Value
Minimum Exposure Time
VC-12MX
CXP6_X1
47 ㎲
48 ㎲
CXP6_X2
47 ㎲
48 ㎲
CXP6_X4
42 ㎲
43 ㎲
8.6 Real Exposure (VC-12MX Only)
8.6.1 Timed Exposure Mode
When you set the Trigger Mode parameter to Off or set the Exposure Mode parameter to Timed, the exposure
time for each frame acquisition is determined by the value of the camera’s Exposure Time parameter.
As soon as the camera detects an exposure start trigger signal, the camera will begin a frame exposure. When
the exposure time ends, the pixels are being sampled and prepared for readout. This sequence is called the
frame overhead time (FOT). Immediately after the FOT, the frame is read out automatically. During the FOT, an
additional exposure time will be applied as an offset value shown in the figure below. This offset value varies
depending on the camera’s CXP Link Configuration parameter setting value. With the Timed exposure mode,
the actual exposure time is equal to the camera’s Exposure Time parameter setting value. This is true because
the offset value is compensated on the actual exposure time automatically. The offset values and minimum
allowed exposure time depending on the CXP Link Configuration setting are shown in the table below.
Page 38 of 76 RA14-14A-022
Figure 8.6 Real Exposure with Timed Exposure Mode
Table 8.2 Offset Value and Minimum Exposure Time
VC CXP series
8.6.2 Trigger Width Exposure Mode
When you set the Exposure Mode to Trigger Width, the exposure time is determined by the way that you
manipulate the rise and fall (trigger width) of the external trigger signal. As soon as the camera detects an
external trigger signal, the camera will begin a frame exposure and an additional exposure time will be applied
as the offset value (Table 8.2) shown in the figure below.
Figure 8.7 Real Exposure with Trigger Width Exposure Mode
Page 39 of 76 RA14-14A-022
VC CXP series
8.7 Electronic Shutter Operation
VC CXP cameras are equipped with imaging sensors that have an electronic shutter. There are two types of
electronic sensors, i.e. global and rolling. VC CX cameras use sensors with global shutters.
8.7.1 Global Shutter
When an exposure start trigger signal is applied to the cameras equipped with a global shutter, exposure begins
for all lines in the sensor as shown in Figure 8.8. Exposure continues for all lines in the sensor until the
programmed exposure time ends or when the exposure start trigger signal ends the exposure time if the camera
is using the trigger width exposure mode. At the end of the exposure time, exposure ends for all lines in the
sensor. Immediately after the end of exposure, pixel data readout begins and proceeds line by line until all pixel
data is read out of the sensor. A main characteristic of a global shutter is that for each frame acquisition, all of
the pixels in the sensor start exposing at the same time and all end exposing at the same time. This means that
image brightness tends to be more uniform over the entire area of each acquired image, and it helps to minimize
problems with acquiring images of object in motion.
The cameras can provide a Strobe Out output signal that will go high when the exposure time for a frame
acquisition begins and will go low when the exposure time ends.
Figure 8.8 Global Shutter
Page 40 of 76 RA14-14A-022
VC CXP series
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.
8.8 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 imaging 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 (Image Format Control).
On the VC-25MX camera, frames with a smaller width also take less time to read out of the sensor. For
more information, refer to Table 9.4.
The exposure time for acquired frames. If you use very long exposure times, you can acquire fewer frames
per second.
8.8.1 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.
Use a smaller ROI. Decreasing the ROI means that the camera has less data to transmit and therefore
the transmission time will decrease.
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 times or
small region of interest, it is possible that your exposure time is limiting the maximum allowed frame rate. If
you are using a long exposure time or a small ROI, 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.)
Page 41 of 76 RA14-14A-022
VC CXP series
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 achieve increased frame rates by
decreasing the height of the ROI; however, decreasing the width of the ROI does not affect the frame rate.
On the VC-25MX camera, you can also achieve increased frame rates by decreasing the width of the ROI.
The ROI is referenced to the top left corner [origin (0, 0)] of the sensor array as follows.
Figure 9.1 Image Region of Interest
Page 42 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
ImageFormatControl
SensorWidtha
-
Effective width of the sensor
SensorHeighta
-
Effective height of the sensor
WidthMax
-
Maximum allowed width of the image with the current
camera settings
HeightMax
-
Maximum allowed height of the image with the current
camera settings
Widthb
-
Current width of the image
Heightb
-
Current height of the image
OffsetX c
-
Horizontal offset from the origin to the Image ROI
OffsetY c
-
Vertical offset from the origin to the Image ROI
The unit for 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
Camera Model
Minimum Width Settings
Minimum Height Settings
VC-12MX
256
4
VC-25MX
256
4
The XML parameters related to ROI settings are as follows.
You can change the size of ROI by setting the Width and Height parameters. And also, you can 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 VC-12MX camera, the Width parameter must be set to a multiple of 16, and the Height parameter
must be set to a multiple of 4.
On the VC-25MX camera, the Width parameter must be set to a multiple of 64, and the Height parameter
must be set to a multiple of 2 only on the color model.
The minimum allowed setting values for the ROI Width and Height are shown below.
Table 9.1 XML parameters related to ROI
Table 9.2 Minimum ROI Width and Height Settings
Page 43 of 76 RA14-14A-022
VC CXP series
ROI Size (H × V)
1 Channel
2 Channels
4 Channels
4096 × 500
276 fps
540 fps
928 fps
4096 × 1000
140 fps
277 fps
540 fps
4096 × 1500
94 fps
187 fps
365 fps
4096 × 2000
70 fps
140 fps
275 fps
4096 × 2500
56 fps
113 fps
221 fps
4096 × 3072
46 fps
92 fps
181 fps
ROI Size (H × V)
2 Channels
4 Channels
5120 × 1000
228 fps
360 fps
5120 × 2000
116 fps
184 fps
5120 × 3000
78 fps
124 fps
5120 × 4000
59 fps
92 fps
5120 × 5120
46 fps
72 fps
256 ~ 3776 × 5120
62 fps
98 fps
4032 × 5120
58 fps
92 fps
4544 × 5120
52 fps
82 fps
5120 × 5120
46 fps
72 fps
On the VC-12MX camera, the maximum frame rates depending on Vertical ROI changes are shown below.
Table 9.3 Maximum Frame Rates by VC-12MX ROI Changes
On the VC-25MX camera, the maximum frame rates depending on Vertical and Horizontal ROI changes are
shown below.
Table 9.4 Maximum Frame Rates by VC-25MX ROI Changes
Page 44 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
ImageFormatControl
BinningHorizontalMode
Sum
Updated automatically according to the
Binning Vertical Mode
Average
BinningHorizontal
1, 2, 4
Updated automatically according to the
Binning Vertical
BinningVerticalMode
Sum
Sum the adjacent pixels as many as specified
by the Binning Vertical setting value, and then
send them as one pixel.
Average
Sum the adjacent pixels as many as specified
by the Binning Vertical setting value and
divide them by the number of summed pixels,
and then send them as one pixel.
BinningVertical
1, 2, 4
Number of vertical pixels to combine together
9.2 Binning (VC-25MX Only)
The Binning has the effects of increasing the level value and decreasing resolution by summing the values of the
adjacent pixels and sending them as one pixel. The XML parameters related to Binning are as follows.
For example, if you set 2 2 binning as shown in the figure below, the camera’s resolution is reduced to 1/2. If
you set the Binning Mode to Sum, the maximum allowed resolution of the image is reduced 1/2 and the
responsivity of the camera is doubled. If you set the Binning Mode to Average, the maximum allowed resolution
of the image is reduced to 1/2, but there is no difference in responsivity between a binned image and an original
image. The Width Max and Height Max parameters, indicating the maximum allowed resolution of the image
with the current camera settings, will be updated depending on the binning settings. And also, the Width,
Height, Offset X and Offset Y parameters will be updated depending on the binning settings. You can verify the
current resolution through the Width and Height parameters.
Table 9.5 XML parameters related to Binning
Page 45 of 76 RA14-14A-022
Figure 9.2 Binning
VC CXP series
To apply the binning feature on the VC-25MX camera, you need to set the Binning Vertical Mode and Binning
Vertical parameters. According to these values, the Binning Horizontal Mode and Binning Horizontal
parameters will be updated automatically. The available settings for the binning feature are as follows.
Figure 9.3 2 2 and 4 4 Binning
Page 46 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
CoaXPress
CxpLinkConfigurationPreferredSwitch
CXP6_X1
Sets the A parameter value to CXP6_X1.
CXP6_X2
Sets the A parameter value to CXP6_X2.
CXP6_X4
Sets the A parameter value to CXP6_X4.
CxpLinkConfigurationPreferredA
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
CXP6_X1
CXP6_X2
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)
9.3 CXP Link Configuration
VC CXP 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. VC CXP cameras support one master connection and
up to three extension connections to configure a link. In compliance with the CoaXPress standard, VC CXP
cameras include an automatic link detection mechanism to correctly detect the camera to CXP Frame Grabber
connections.
Figure 9.4 CXP Link Configuration
The XML parameters related to the link configuration between the camera and CXP Frame Grabber are located
in the CoaXPress category under the Transport Layer Control as shown below.
Page 47 of 76 RA14-14A-022
Table 9.6 XML Parameter related to CXP Link Configuration
VC CXP series
MSB
LSB
10Bit Output
8Bit Output
D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
Original
Data
D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
XML Parameters
Description
ImageFormatControl
PixelFormat
Sets the pixel format supported by the device.
Mono Sensor
Color Sensor
Mono 8
Mono 10
Bayer GB 8
Bayer GB 10
Bayer RG 8
Bayer RG 10
VC-12MX cameras support only 8 bit pixel format.
9.4 Pixel Format
The camera processes image data in the unit of 10 bit internally. You can determine the format (8 bits or 10 bits)
of these image data transmitted from the camera by selecting a pixel format. When the camera is set for 8 bit
pixel format, the 2 least significant bits will be dropped from overall 10 bits.
Figure 9.5 Pixel Format
The XML parameter related to the Pixel Format is as follows.
Table 9.7 XML Parameter related to Pixel Format
The available pixel formats on the monochrome and color cameras are as follows.
Table 9.8 Pixel Format Values
Page 48 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
DataRoiControl
RoiSelector
WhiteBalanceAuto
Selects a Data ROI used for Balance White Auto.
Only available on color cameras
RoiOffsetX
-
X coordinate of start point ROI
RoiOffsetY
-
Y coordinate of start point ROI
RoiWidth
-
Width of ROI
RoiHeight
-
Height of ROI
9.5 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.
Table 9.9 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.
Page 49 of 76 RA14-14A-022
Figure 9.6 Effective Data ROI
VC CXP series
XML Parameters
Value
Description
AnalogControl
BalanceRatioSelector
Red
A Balance Ratio value will be applied to red pixels.
Blue
A Balance Ratio value will be applied to blue pixels.
BalanceRatio
×1.0 ~ ×4.0
Controls ratio of the selected color by referring to
Green.
XML Parameters
Value
Description
AnalogControl
BalanceWhiteAuto
Off
Balance White Auto Off
Once
White Balance is adjusted once and then Off.
9.6 White Balance (Color Camera)
The color cameras include the white balance capability to adjust the color balance of the images transmitted
from the cameras. With the white balancing scheme used on VC CXP cameras, the Red intensity and Blue
intensity 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 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.
Table 9.10 XML Parameters related to White Balance
9.6.1 Balance White Auto
The Balance White Auto feature is implemented on color cameras. It will control the white balance of the image
acquired from the color camera according to the GeryWorld 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.
Table 9.11 XML Parameters related to Balance White Auto
Page 50 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
AnalogControl
GainSelector
DigitalAll
Applies gain to all digital channels.
Gain
×1.0~×4.0
Sets an absolute physical gain value (0 ㏈ ~ 12 ㏈).
BlackLevelSelector
DigitalAll
Applies black level to all digital channels.
BlackLevel
0~16
0~64
Sets an absolute physical black level value.
0 ~ 16 LSB @ 8 bit
0 ~ 64 LSB @ 10 bit (VC-25MX Only)
9.7 Gain and Black Level
Increasing the Gain parameter increases the slop of the camera’s response curve as shown in the figure below.
This results in a higher grey value output from the camera for a given amount of output from the imaging sensor.
Adjusting the Black Level parameter will result in an offset to the pixel values output from the camera.
The XML parameters related to Gain and Black Level are as follows.
Figure 9.7 Setting the Gain
Table 9.12 XML Parameters related to Gain and Black Level
Page 51 of 76 RA14-14A-022
VC CXP series
L3 L2 L1 R1 R2 R3
<Current Pixel>
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
You must download a Defect Pixel Map to the camera before using the Defective Pixel
Correction feature. For more information about how to download a Defect Pixel Map to the
camera, refer to Appendix A.
9.8 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.
9.8.1 Correction Method
Correction value for Defect Pixel is calculated based on valid pixel value adjacent in the same line.
Figure 9.8 Location of Defect Pixel to be corrected
If Current Pixel is a Defect Pixel as shown in the above figure, correction value of this pixel is obtained as shown
in the following table depending on whether surrounding pixel is Defect Pixel or not.
Table 9.13 Calculation of Defect Pixel Correction Value
Page 52 of 76 RA14-14A-022
VC CXP series
It is recommended that you enable the Defective Pixel Correction feature before
executing the Ffc Generate parameter.
Before executing the Ffc Generate parameter, you must set the camera as follows:
OffsetX, Y: 0
Width, Height: Maximum values
Binning: 1
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.
9.9 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 can be summarized by the following equation:
IC = IR / IF
Where,
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 data (IF) and apply the Flat Field Correction feature according to
the following procedures.
1. Execute the Ffc Generate parameter.
After executing the Ffc Generate parameter, you must acquire one image to generate the scaled-down Flat
Filed data.
2. VC-25MX Only. Before saving the generated Flat Field data, you can choose a location to store the data by
using the Ffc Selector parameter.
3. Execute the Ffc Save parameter to save the generated Flat Field data into the non-volatile memory.
When the scaled-down Flat Field data are used for corrections, they are expanded and applied with a
Bilinear Interpolation as shown in the Figure 9.10.
4. Set the Ffc Mode parameter to On to apply the Flat Field data to the camera.
Page 53 of 76 RA14-14A-022
VC CXP series
Figure 9.9 Generation and Application of Flat Field Data
Figure 9.10 Bilinear Interpolated Magnification
Page 54 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
FlatFieldCorrection
FfcMode
Off
Flat Field Correction Off
On
Enables the Flat Field Correction feature.
FfcGenerate
-
Generates the Flat Field data.
FfcSave
-
Saves the generated Flat Field data in the nonvolatile memory.
The generated data by executing the
FfcGenerate command 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.
FfcLoad
-
Loads the Flat Field data from the non-volatile
memory into volatile memory.
FfcSelector
Space0 ~ Space3
Selects a location to save Flat Field data to or load
Flat Field data from.
The XML parameters related to Flat Field Correction are as follows.
Table 9.14 XML Parameters related to Flat Field Correction
Page 55 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
DSNU
DSNUGenerate
-
Generates the DSNU data for the current CXP Link Configuration
setting value (CXP6_X2, CXP6_X4).
DSNUSave
-
Saves the generated DSNU data in the non-volatile memory.
The generated data by executing the DSNUGenerate command
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 nonvolatile memory.
DSNULoad
-
Loads the DSNU data from the non-volatile memory into the volatile
memory.
9.10 Dark Signal Non-Uniformity Correction (VC-25MX Only)
In theory, when a digital camera acquires images in complete darkness, all of the pixel values in the image
should be near zero and they should be equal. In practice, however, slight variations in the performance of the
pixels in the sensor will cause some variations in the pixel values output from the camera when the camera is
acquiring in darkness. This variation is known as Dark Signal Non-Uniformity (DSNU). The VC-25MX camera
provides the DSNU Correction feature.
The XML parameters related to DSNU are as follows.
Table 9.15 XML parameters related to DSNU
Page 56 of 76 RA14-14A-022
VC CXP series
For optimum DSNU correction results, we recommend that you generate DSNU data after
the temperature of the camera housing has been stabilized.
Before generating DSNU data, set the PRNU and FFC features to Off.
9.10.1 Generating and Saving User DSNU Correction Values
To generate and save user-defined DSNU correction values, use the following procedures.
1. To obtain the optimum DSNU correction values, set the ROI to the actual settings you will be using during
normal operation.
2. Ensure that the camera will be acquiring images in complete darkness by covering the camera lens, closing
the iris in the lens, or darkening the room.
3. Begin acquiring images by setting the camera for the Free-Run mode.
4. Execute the DSNU Generate command to generate DSNU data for the current CXP Link Configuration
setting value.
5. The generated DSNU correction values will be activated and saved in the camera’s volatile memory.
6. To save the generated DSNU correction values in the camera’s Flash (non-volatile) memory, execute the
DSNU Save command. The previous DSNU values saved in the memory will be overwritten.
To disregard the generated DSNU correction values and load the existing values in the Flash memory,
execute the DSNU Load command.
Page 57 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
PRNU
PRNUMode
Off
Disables the PRNU Correction feature.
On
Enables the PRNU Correction feature.
PRNU Selector
Factory
Selects Factory as a non-volatile memory location to load PRNU
data from.
User
Selects User as a non-volatile memory location to save PRNU
data to or load PRNU data from.
PRNU Generate
-
Generates the PRNU data for the current CXP Link Configuration
setting value (CXP6_X2, CXP6_X4).
PRNUSave
-
Saves the generated PRNU data in the non-volatile memory.
The generated data by executing the PRNUGenerate
command 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.
PRNULoad
-
Loads the PRNU data from the non-volatile memory into the
volatile memory.
9.11 Photo Response Non-Uniformity Correction (VC-25MX Only)
In theory, when a digital camera acquires images with the camera viewing a uniform light-colored target in bright
light, all of the pixel values in the image should be near the maximum grey value and they should be equal.
In practice, however, slight variations in the performance of the pixels in the sensor, variations in the optics, and
variations in the lighting will cause some variations in the pixel values output from the camera. This variation is
known as Photo Response Non-Uniformity (PRNU). The VC-25MX camera provides the PRNU correction
feature and two PRNU data storage locations for each CXP Link Configuration.
The XML parameters related to PRNU are as follows.
Table 9.16 XML parameters related to PRNU
Page 58 of 76 RA14-14A-022
VC CXP series
To generate the optimum PRNU data,
we recommend that you generate DSNU correction values first before generating
PRNU correction values.
set the FFC feature to Off before generating PRNU correction values.
The grey reference image must be acquired at uniform illumination. We strongly
recommend that you use a high quality light source to deliver uniform illumination.
Standard illumination may not be appropriate.
The PRNU correction data stored in Factory are optimized for use in typical situations and
will provide good camera performance in most cases. Use of the values stored in Factory is
recommend.
9.11.1 Generating and Saving User PRNU Correction Values
To generate and save user-defined PRNU correction values, use the following procedures.
1. To generate the PRNU correction values suitable for your environment, set the ROI to the actual settings
you will be using during normal operation. We strongly recommend that you use the PRNU correction
values stored in Factory, if you cannot set up the uniform illumination.
2. Without mounting a lens on the camera, place a uniform illumination (e.g. backlight) in the field of view of
the camera. Set up the camera as you would for normal operation. We recommend that you make
adjustments to achieve the digital output level in a range from 150 to 200 (Gain: 1.00 at 8 bit).
3. Set the PRNU Mode parameter to On.
4. Begin acquiring images by setting the camera for the Free-Run mode.
5. Execute the PRNU Generate command to generate PRNU correction values for the current CXP Link
Configuration setting value.
6. The generated PRNU correction values will be activated and saved in the camera’s volatile memory.
7. To save the generated PRNU correction values in the camera’s Flash (non-volatile) memory, set the PRNU
Selector parameter to User, and then execute the PRNU Save command. The previous PRNU values
saved in the memory will be overwritten.
To disregard the generated PRNU correction values and load the existing values in the Flash memory,
specify a location to load from by using the PRNU Selector parameter and execute the PRNU Load
command.
Page 59 of 76 RA14-14A-022
VC CXP series
9.12 High Dynamic Range (VC-12MX Monochrome Only)
When you acquire images in some situations where a bright light source or shiny materials are located within the
field of view, the light areas appear overexposed in the acquired images. And if you use a short exposure time to
avoid overexposure in the light areas of the acquired images, all details will be lost in the darker areas.
The Multiple Slop capability is implemented on VC-12MX camera to acquire high dynamic range (HDR) images
which have higher variations between the brightest and darkest portions of the images. As shown in the figure
below, when the bright pixel reaches a certain output level, it will be maintained at the level for a programmable
time from overall exposure time. This happens two times to make sure that the pixel is not saturated at the end
of exposure time.
Figure 9.11 High Dynamic Range Concept Drawing
Page 60 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
HDRControl
HDRMode
Off
High Dynamic Range Off
On
Enables the HDR feature.
HDRDB
0 ~ 40 ㏈
Sets the dynamic range to increase in ㏈.
The exposure time for both Knee Point 1 and Knee
Point 2 will be automatically optimized by setting a
HDRDB value.
XML Parameters
Description
DeviceControl
DeviceTemperature
Displays device temperature in Celsius.
To use the HDR feature, set the Exposure Mode parameter to Timed and then set the parameters related to the
HDR feature. The XML parameters related to HDR are as follows.
Table 9.17 XML Parameters related to HDR Control
9.13 Temperature Monitor
The camera has an embedded sensor chip to monitor the internal temperature.
The XML parameter related to Device Temperature is as follows.
Table 9.18 XML Parameter related to Device Temperature
9.14 Status LED
A LED is installed on the back panel of the camera to inform the operation status of the camera. LED status and
corresponding camera status are as follows:
Steady Red: Camera is not initialized.
Slow Flashing Red: A CXP link is not configured.
Fast Flashing Orange: Camera is checking a CXP link configuration.
Steady Green: A CXP link is configured.
Fast Flashing Green: Camera is transmitting image data.
Page 61 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
ImageFormatControl
TestPattern
Off
Test Pattern Off
GreyHorizontalRamp
Sets to Grey Horizontal Ramp.
GreyDiagonalRamp
Sets to Grey Diagonal Ramp.
GreyDiagonalRampMoving
Sets to Grey Diagonal Ramp Moving.
GreyHorizontalRamp_2
Sets to Grey Horizontal Ramp_2.
9.15 Test Pattern
To check normal operation of the camera, it can be set to output test patterns created inside, instead of image
data from the imaging sensor. There are four types of test pattern; image with different value in horizontal
direction (Grey Horizontal Ramp), image with different value in diagonal direction (Grey Diagonal Ramp), moving
image with different value in diagonal direction (Grey Diagonal Ramp Moving), and image with different value in
horizontal direction output from the imaging sensor (Grey Diagonal Ramp_2, VC-12MX Only).
The XML parameters related to Test Pattern are as follows.
Table 9.19 XML Parameter related to Test Pattern
Figure 9.12 Grey Horizontal Ramp
Page 62 of 76 RA14-14A-022
VC CXP series
Figure 9.13 Grey Diagonal Ramp
Figure 9.14 Grey Diagonal Ramp Moving
Page 63 of 76 RA14-14A-022
VC CXP series
The test pattern may look different because the region of the test pattern may vary depending
on the camera’s resolution.
Figure 9.15 Grey Horizontal Ramp_2
Page 64 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
DigitalIOControl
LineSelector
LineIn0
Selects the number 1 pin of the camera’s control I/O
receptacle as an input line.
LineOut0
Selects the number 4 pin of the camera’s control I/O
receptacle as an output line.
LineInverter
On
Enables inversion on the output signal of the line.
Off
Disables inversion on the output signal of the line.
Line Source
Off
Disables the line output.
Frame Active
Outputs pulse signals indicating a frame readout time
Strobe Out
Outputs pulse signal indicating the current exposure
time with Strobe Out Delay
User Output
Outputs User Output signal set by User Output Value.
UserOutputValue
On
Set the bit state of the line to High
Off
Set the bit state of the line to Low
StrobeOutDelay
0 ~ 65535
Set a delay in microseconds when the Line Source is
set to Strobe Out
9.16 Digital IO Control
The control I/O receptacle of the camera is designated as programmable output and can be operated in various
modes.
The XML parameters related to Digital IO Control are as follows.
Table 9.20 Digital IO Control
Page 65 of 76 RA14-14A-022
VC CXP series
When you use the Strobe Out signal, be aware that there is a Strobe Out Start Delay as shown
in the Table 9.21.
Camera Model
Strobe Out Start Delay
VC-12MX
≤ 0.8 ㎲
VC-25MX
≤ 0.8 ㎲
The camera can provide a Strobe Out 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 Strobe Out signal to know when exposure is taking place and thus know when to avoid moving the
camera.
Figure 9.16 Strobe Out Signal
Table 9.21 Strobe Out Start Delay
Page 66 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
FanControl
FanOperationMode
Off
Turns off the fan.
On
Turns on the fan.
Temperature
Turns on the fan when the internal temperature
exceeds the value set in the Fan Operation
Temperature parameter.
FanOperationTemperature
-10℃~80℃
Set the temperature to operate the fan when the
Fan Operation Mode parameter is set to
Temperature.
FanSpeed
-
Verifies the current Fan RPM.
XML Parameters
Description
DeviceControl
DeviceUserID
Inputs user defined information (16 bytes).
XML Parameters
Description
DeviceControl
DeviceReset
Resets the camera physically.
9.17 Fan 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 Fan
Control are as follows.
Table 9.22 XML Parameters related to Fan Control
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.
Table 9.23 XML Parameter related to Device User ID
9.19 Device Reset
Reset 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.
Table 9.24 XML Parameter related to Device Reset
Page 67 of 76 RA14-14A-022
VC CXP series
XML Parameters
Value
Description
UserSetControl
UserSetSelector
Default
Selects the Factory Default settings.
UserSet1
Selects the User Set1 settings.
UserSet2
Selects the User Set2 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 User Set1 settings when reset.
UserSet2
Applies the User Set1 settings when reset.
9.20 User Set Control
You can save the current camera settings to the camera’s internal ROM. You can also load the camera settings
from the camera’s internal ROM. The camera provides two setups to save and three setups to load settings.
The XML parameters related to User Set Control are as follows.
Table 9.25 XML Parameters related to User Set Control
9.21 Field Upgrade
The camera provides a feature to upgrade Firmware and FGPA logic through CoaXPress interface rather than
disassemble the camera in the field. Refer to Appendix B for more details on how to upgrade.
Page 68 of 76 RA14-14A-022
VC CXP series
10 Troubleshooting
When you have a problem with a Vieworks camera, please check the following items.
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 too small.
If you identify abnormal operation or overheating sign,
Ensure the 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 trigger related parameters on your 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 LineIn0.
If there is a 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.
Page 69 of 76 RA14-14A-022
VC CXP series
Appendix A Defect Pixel Map Download
1. Create the Defect 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.
Each row is produced in the order of the horizontal and vertical coordinate values.
The input sequence of pixel is irrelevant.
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 defect pixel map file (*.csv), and then
click the Download button.
Page 70 of 76 RA14-14A-022
VC CXP series
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.
Page 71 of 76 RA14-14A-022
VC CXP series
Appendix B Field Upgrade
B.1 MCU
1. Run Vieworks Imaging Solution 7.X and click the Configure button to display the window as shown below.
2. Select the MCU tab, click the File Path button, search and select the MCU upgrade file (*.srec), and then
click the Download button.
3. MCU upgrade file download starts and the downloading status is displayed at the bottom of the window.
Page 72 of 76 RA14-14A-022
VC CXP series
4. Once all the processes have been completed, turn the camera power off and turn it back on again.
Check the Device Version parameter value to confirm the version.
Page 73 of 76 RA14-14A-022
VC CXP series
B.2 FPGA
1. Run Vieworks Imaging Solution 7.X and click the Configure button to display the window as shown below.
2. Select the FPGA tab, click the File Path button, search and select the FPGA upgrade file (*.fpga), and then
click the Download button.
3. The subsequent processes are identical to those of MCU upgrade.
Page 74 of 76 RA14-14A-022
VC CXP series
B.3 XML
1. Run Vieworks Imaging Solution 7.X and click the Configure button to display the window as shown below.
2. Select the XML tab, click the File Path button, search and select the XML upgrade file (*.zip), and then click
the Download button.
3. The subsequent processes are identical to those of MCU upgrade.
Page 75 of 76 RA14-14A-022
http://www.vieworks.com
vieworks@vieworks.com
Loading...