EPSON GT-30000 User Manual
Color Image Scanner
®
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contained herein. Neither is any liability assumed for damages resulting from the use of the
information contain e d herein.
Neither SEIKO EPSON CO RPORATION nor its affiliates sh all be liable to the purchaser of
this product or third parties for damages, losses, costs, or expenses incurred by the purchaser
or third parti e s as a result of: ac cident, misuse, or abuse of this product or unau t horized
modifications, repairs, or alterations to this product.
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problems arising from the use of any options or any consumable products other than those
designated as Original EPSON Products or EPSON Approved Products by SEIKO EPSON
CORPORATION.
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General Notice: Other product names used herein are for identification purposes only and may be
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Copyright © 2000 by SEIKO EPSON CORPORATION, Nagano, Japan.
Reference Guide
Contents
Introduction
Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Chapter 1 Scanning Basics
Main Window and Preview Window. . . . . . . . . . . . . . . . . . . . . . .1-1
Main window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-2
Preview window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Optimizing Image Scanning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-4
Manually optimizing images . . . . . . . . . . . . . . . . . . . . . . . . .1-5
Displaying a preview image. . . . . . . . . . . . . . . . . . . . . . . . . .1-6
Adjusting the Highlight Setting . . . . . . . . . . . . . . . . . . . . . . . . . . .1-7
Adjusting the Shadow Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-8
Adjusting the Gamma Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-9
Applying a Preset Tone Curve . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-10
Adjusting the Gray Balance Intensity Setting . . . . . . . . . . . . . . . .1-14
Adjusting the Saturation Setting. . . . . . . . . . . . . . . . . . . . . . . . . . .1-15
Using the Tone Curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-16
Saving your own tone curve. . . . . . . . . . . . . . . . . . . . . . . . . .1-19
Deleting a customized tone curve . . . . . . . . . . . . . . . . . . . . .1-19
Closing the Tone Correction dialog box . . . . . . . . . . . . . . . .1-19
Optimizing OCR Scanning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20
Scanning text. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-20
Improving character recognition . . . . . . . . . . . . . . . . . . . . . .1-20
If you still have problems.... . . . . . . . . . . . . . . . . . . . . . . . . . .1-21
Potential text recognition problems. . . . . . . . . . . . . . . . . . . .1-22
Contents 1
Chapter 2 Understanding EPSON TWAIN HS Features
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
EPSON TWAIN HS Main Window. . . . . . . . . . . . . . . . . . . . . . . . 2-2
Document Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Image Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Changing Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Unsharp Mask. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Size . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Preview Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Preview Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Zoom Preview button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Return to Full Preview button. . . . . . . . . . . . . . . . . . . . . . . . 2-10
Return to Zoom Preview button. . . . . . . . . . . . . . . . . . . . . . 2-11
Marquee and Marquee Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Making and modifying marquees . . . . . . . . . . . . . . . . . . . . 2-12
Delete Marquee button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Duplicate Marquee button. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Auto Locate button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Marquee number indicator . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Adjust Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Auto Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Image Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Tone Correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Color Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Reset button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Configuration Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Scan Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Chapter 3 Calibrating Your System
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Calibrating Your Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
For Windows 98, 2000, and Millennium Edition users . . . 3-1
For Windows 95 and NT 4.0 users . . . . . . . . . . . . . . . . . . . . 3-4
Using ICM, ICM/sRGB (For Windows 95, 98, 2000,
and Millennium Edition Users). . . . . . . . . . . . . . . . . . . . . . . . . 3-6
2 Contents
Chapter 4 Maintenance and Troubleshooting
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Cleaning the scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-1
Replacing the fluorescent lamp . . . . . . . . . . . . . . . . . . . . . . .4-2
Transporting the Scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Problems and Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-4
Error Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Operating Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
The OPERATE light does not come on. . . . . . . . . . . . . . . . .4-7
The scanner does not scan. . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
The scanner software does not work properly. . . . . . . . . . .4-7
Quality Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
The entire image is distorted or blurred. . . . . . . . . . . . . . . .4-8
Part of the image is distorted or blurred. . . . . . . . . . . . . . . .4-8
Edges of the document are not scanned.. . . . . . . . . . . . . . . .4-9
Colors are patchy or distorted at the edges of the
image.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-9
The image is faint or out of focus. . . . . . . . . . . . . . . . . . . . . .4-9
The image is too dark. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10
Straight lines in the image come out jagged. . . . . . . . . . . . .4-10
The image does not look the same as the original. . . . . . . .4-10
A line of dots is always missing from the scanned
image.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-10
Colors on your monitor are different from those in the
original image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11
Printed co lors are different from those in the original
image.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11
The printed image is larger o r smaller than the
original. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-11
Scanned images cannot be printed or come out
garbled when printed.. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12
Software Setup Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12
You cannot install EPSON TWAIN HS. . . . . . . . . . . . . . . . .4-12
Contents 3
The scanner does not appear in the Port list of the
EPSON TWAIN HS dialog box in Control Panel when
you connect the SCSI model to your PC running
Windows 95 and NT 4.0. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
The Scanner Status does not indicate “Device Ready”
after you click Test in the EPSON TWAIN HS
dialog box (Windows 95 and NT4.0) or in the
Scanner’s Properties dialog box (Windows 98, 2000,
and Millennium Edition) in Control Panel. . . . . . . . . . . 4-13
Software Operation Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
You cannot start EPSON TWAIN HS. . . . . . . . . . . . . . . . . . 4-14
You cannot select Automatic Document Feeder. . . . . . . . . 4-15
Scanning Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Image is dark, with little or no detail. . . . . . . . . . . . . . . . . . 4-15
You cannot scan an image or you only get a few dots
for the scanned image. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Moiré (cross hatch) patterns appear in the scanned
image during halftone scanning. . . . . . . . . . . . . . . . . . . . 4-15
Colors differ from the original or look strange. . . . . . . . . . 4-16
Scanned image is too large. . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Poor character recognition during OCR scanning. . . . . . . 4-16
You cannot scan from the Automatic Document Feeder. . 4-16
Scanning does not start by pressing the Start button. . . . . 4-17
Scanned image by using the Start button is missing.. . . . . 4-17
Paper Jams. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Network Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
You cannot install EPSON TWAIN HS Network
and/or EPSON Scan Server. . . . . . . . . . . . . . . . . . . . . . . . 4-18
The scanner does not appear in the Scanner Selection
box in the EPSON Scan Server setup dialog box.
(For Windows 95 and NT 4.0 users). . . . . . . . . . . . . . . . . 4-18
Status: unavailable appears under the General tab of
the EPSON GT-30000 Properties dialog box.
(For Windows 98, 2000, and Millennium Edition
users). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
You cannot start up EPSON Scan Server. . . . . . . . . . . . . . . 4-19
EPSON TWAIN HS Network dialog box does not
appear on the client PC when you try to start
EPSON TWAIN HS Network from a
4 Contents
TWAIN-compliant application.. . . . . . . . . . . . . . . . . . . . .4-20
Network connection is terminated before the scanned
image is transferred to the client PC. . . . . . . . . . . . . . . . .4-21
Changing the SCSI ID number or SCSI board. . . . . . . . . . . . . . . .4-21
Upgrading the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-23
Upgrading from Windows 98 or 95 to
Windows Millennium Edition . . . . . . . . . . . . . . . . . . . . . .4-23
Upgrading from Windows 98, 95, or NT 4.0 to
Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-24
Upgrading from Windows 95 to Windows 98. . . . . . . . . . .4-25
Recovering from Scanner Software Installation Problems on
Windows 98, 2000, and Millennium Edition. . . . . . . . . . . . . . .4-26
Sizing up Your System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-31
RAM and hard disk size . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-31
Video cards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-31
Monitors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-31
File compression software. . . . . . . . . . . . . . . . . . . . . . . . . . . .4-32
Contacting Customer Support. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-32
Appendix A Setting up the Scanner Server PC
Setting up the Scanner Server PC . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Installing the TCP/IP Protocol . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-1
Installing the TCP/IP protocol
(Windows Millennium Edition, 98, and 95) . . . . . . . . . . . A-1
Installing the TCP/IP protocol (Windows 2000) . . . . . . . . . A-5
Installing the TCP/IP protocol (Windows NT 4.0) . . . . . . .A-8
Setting the Scanner Server PC’s IP Address . . . . . . . . . . . . . . . . .A-10
Assigning an IP address to a scanner server PC on
Windows Millennium Edition/98/95. . . . . . . . . . . . . . . .A-11
Assigning an IP address to a scanner server PC on
Windows 2000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-12
Assigning an IP address to a scanner server PC on
Windows NT 4.0. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A-15
Connecting the Scanner to the Scanner Server PC . . . . . . . . . . . .A-16
Contents 5
Appendix B Technical Specifications
Scanning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Standards and Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
SCSI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-4
Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
Initialization Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6
Automatic Document Feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6
IEEE 1394 Interface Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-7
Glossary
Index
6 Contents
Introduction
Features
The CD-ROM that comes with your scanner contai ns the EPSON
scanner software suite, including EPSON TWAIN HS and EPSON
TWAIN HS Network (The network version of EPSON TWAIN
HS). The software suite is the perfect companion for your EPSON
scanner. Using your scanner and the software from the CD-ROM,
you can scan images in color, grayscale, or black and white, and
save them as files or print them out. EPSON Scan Server allows
your scanner to be used over a network.
❏ The software supports the following EPSON scanner:
EPSON GT-30000
❏ EPSON TWAIN HS and EPSON TWAIN HS Network
directly control all of the features of your EPSON scanner.
This program is the standard cross-platform interface for
other applications.
The CD-ROM also contains other applications that let you use
your scanner in exciting new ways. For detailed information , refer
to the supporting documentation.
❏ EPSON Screen Calibration utili ty allows you to calibrate your
scanner and monitor to reproduce images identical to the
originals.
❏ ISIS (Image and Scanner Interface Specification) driver is an
industry standard interface for high performance document
scanning.
Introduction 1
About This Guide
The information in this guide is divi ded into si x chapters, wi th a
glossary and index provided for your reference.
❏ Chapter 1 describes the basic steps of scanning.
❏ Chapter 2 provides a comp lete description of EPSON TWAIN
HS and EPSON TWAIN HS Network features. Refer to this
chapter when modifying scanning settings.
❏ Chapter 3 covers how to calibrate your monit or to match your
EPSON scanner. If you notice t hat colors on you r screen or in
your printout do not match the original image, see this
chapter.
❏ Chapter 4 contains maintenance and troubleshooting
information.It also conta ins customer support information. If
your application does not opera te properly or scanned images
are not what you expect, see this chapter.
❏ Appendix A describes the procedure for initially setting up a
PC to be a scanner server PC.
❏ Appendix B contains technical specifications information.
Notes contain important information and useful tips about your
scanner and software.
To set up and use the scanner, see your scanner’s online Setup
Guide. EPSON TWAIN HS and EPSON TWAIN HS Network
online help can also prov ide you with i nformation on modifying
EPSON TWAIN HS or EPSON TWAIN HS Network settings.
2 Introduction
Chapter 1
Scanning Basics
Main Window and Preview Windo w
EPSON TWAIN HS and EPSON TWAIN HS Net work have two
main windows. The EPSON TWAIN HS window or the EPSON
TWAIN HS Network window (main window) and the Preview
window.
Note:
All settings and functions available from the two main windows are the
same for both EPSON TWAIN HS and EPSON TWAIN HS Network.
Although most of the illustrations and explanations in this gu ide are for
the EPSON TWAIN HS, they also apply to EPSON TWAIN HS
Network.
Scanning Basics 1-1
Main window
The main window gives yo u access to the control s where you can
make basic settings, such as Document Source, the type of
material to scan, scanning resolution, scanned image size, and so
on. If you want to specify the areas of the images to scan or you
want to see the effects of your settings before scanning, click
Preview to open the Preview window to display the preview
images.
1-2 Scanning Basics
Preview window
In the Preview window, there are more options ava ilable to give
you greater control over your scanning i mage. Powerful tool s are
available to help you adjust tones, colors, and other elements to
optimize your images.
Scanning Basics 1-3
Optimizing Image Scanning
EPSON TWAIN HS can automatically adjust and optimize the
exposures and colors of scanned images during scanning. You can
also make adjustments manually with the image quality
adjustment tools in the Preview window. This section provides
general information on optimizing images with these tools.
1-4 Scanning Basics
Preview window
Manually optimizing images
To optimize images manua lly, adjust the following EPSON
TWAIN HS settings in the order specified below:
Adjust the brightness and contrast
1. Adjust the Highlight and Shadow settings in the Image
Controls dialog box. See “Adjusting the Hi ghlight Setting” on
page 1-7 and “Adjusting the Shadow Setting” on page 1-8.
2. Adjust the Gamma setting in the Image Controls dialog box.
See “Adjusting the Gamma Setting” on page 1-9.
3. Adjust the tone curve with a predefined tone correction
setting in the Tone Correction dialog box. See “Applying a
Preset Tone Curve” on page 1-10.
Make color adjustme n ts
4. Adjust the Gray Balance Intensity setting in the Color
Adjustment dialog box. See “Adjusting the Gray Balance
Intensity Setting” on page 1-14.
5. Adjust the Saturation setting in the Color Adjustment dialog
box. See “Adjusting the Saturation Setting” on page 1-15.
6. Manually adjust the tone curve for individual colors in the
Tone Correction dialog box. See “Using the Tone Curve” on
page 1-16.
To make the following adjustments in EPSON TWAIN HS, you
need to display a preview image in the Pr eview window. See the
following section for details.
Scanning Basics 1-5
Displaying a preview image
The Preview window shows you how your adjustments will
affect the image as you make them. Th e Previ e w window i s al so
the starting point for accessing the Image Controls, Color
Adjustment, and Tone Correction dialog boxes that con tain tools
for optimizing your image.
Note:
See “Preview Window” on page 2-8 for Preview window options, and
“Configuration Button” on page 2-24 for information about how to
control preview image quality.
1. After selecting the Document Source, Image Type, and
Resolution in the main window, click Preview to start
prescanning. If the Preview window is not open, it opens and
begins prescanning. A preview image of the document
appears on your screen.
2. Click one of the buttons below to open the d ialog box with the
image optimization tools you need.
Image Controls button
1-6 Scanning Basics
Tone Correction button
Color Adjustment button
Adjusting the Highlight Setting
Highlights are the brightest areas of an image.
1. In the Image Controls dialo g box, click the eyedropper button
under Highlight.
The pointer changes to an eyedropper, with movement
restricted to within the Preview window.
2. Move the eyedropper t o the location you want to select as the
highlight point and clic k it.
The brightness of the pixel at the point you click is set as the
highlight level, and the other p arts of the i mage are ad justed
accordingly.
3. To change the highlight level (brightness) of the point you
selected, move the Highlight slider left or right, or enter a
value in the text box. You can enter a value between 61 and
490 for the highlight.
Scanning Basics 1-7
Note:
See “Image Controls” on page 2-18 for further information on adjusting
the highlight level.
Adjusting the Shadow Setting
Shadows, the darkest areas of an image, are the opposite of
highlights.
1. In the Image Controls dial og box, click the eyedropper butt on
under Shadow.
The pointer changes to an eyedropper, with movement
restricted to within the Preview window.
2. Move the eyedropper to the l ocation you want to sel ect as the
shadow point and click it.
1-8 Scanning Basics
The brightness of the pixel at the point you click is set as the
shadow level, and the other parts of the image are adjusted
accordingly.
3. To change the shadow level (darkness) of the point you
selected, move the Shadow slider left or right, or enter a value
in the text box. You c an enter a value betwe en 0 and 60 for the
shadow.
Note:
See “Image Controls” on page 2-18 for further information on adjusting
the shadow level.
Adjusting the Gamma Setting
Gamma is the difference in contrast between the light tones and
dark tones of an image. Any change you make i n the gamma level
only affects the mid-tones of the image.
Scanning Basics 1-9
To change the gamma level of the image, move the Gam ma slider
left or right, or enter a value in the text box.
You can enter a value between 50 and 500 for the gamma.
Note:
See “Image Controls” on page 2-18 for further information on adjusting
the gamma level.
Applying a Preset Tone Curve
You can finely adjust the contrast within an image by applying
one of the preset tone curves. This allows more control over the
image when used in conjunction wit h the Auto Exposure settings
in the Preview window. The Tone Curve Name list in the Tone
Correction dialog box provides the six most common tone
correction curves, described below.
Linear
A linear tone curve has no tone cor rection. Use this sett ing if you
are satisfied with the tone of the preview image.
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Lighten
Adjusts dark er images (like underexposed film) to make them
slightly brighter.
Darken
Adjusts brighter images (like overexposed film) to make them
slightly darker.
Scanning Basics 1-11
Flat Contrast
Flattens high contrast images to make them look more natural.
High Contrast
Increases the contrast of dull images.
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Open Shadow
Improves details in the dark areas of images.
Note:
See “Using the Tone Curve” on page 1-16 and “Tone Correction” on
page 2-20 for more information on tone correction.
Scanning Basics 1-13
Adjusting the Gray Balance Intensity Setting
Gray balance makes it possible to remove a cast (tint) from a
specific color.
1. In the Color Adjustment dialog box, click the eyedropper
button under Gray Balance Intensity.
The pointer changes to an eyedropper, with movement
restricted to within the Preview window.
2. Move the eyedropper to t he location where you want to adjust
its gray balance intensity, and then click the color.
The color you selected appears in the two boxes below the
Gray Balance Inten si ty slider.
3. To change the gray balance intensi ty level of the colo r, move
the slider left or right, or enter a value in the text box.
You can enter a value between 0 and 100. Chang ing the value
causes the color in the r ight hand box t o change accord ingly.
The changes are also reflected in the image in the Preview
window.
1-14 Scanning Basics
Note:
See “Color Adjustment” on page 2-22 for more information on adjusting
the gray balance intensity level.
Adjusting the Saturation Setting
Saturation is the density of a color. Higher saturation makes the
color appear richer, whil e lower saturation makes it appear pa ler.
To change the saturation lev el of the image, move the Saturation
slider left or right, or input a value in the text box.
You can enter a value between -100 (lowest color density) and 100
(highest color density).
Note:
See “Color Adjustment” on page 2-22 for more information on adjusting
the saturation level.
Scanning Basics 1-15
Using the Tone Curve
The tone curve provides you with a versatile means for adjusting
the intensity of colors of t he image being scanned. You can adjust
the shadow, mid-tone, and highlight values, which helps to
ensure well-balanced coloring of the image.
Note:
❏ Use of the tone curve is recommended for fine adjustments after you
have previewed the image and adjusted the highlights and the
shadows using the Auto Exposure and the Image Controls dialog
box. Use of the tone curve to make initial settings is not
recommended.
❏ The Tone Correction button becomes unavailable if Black & White
is selected from the Image Type dialog box list.
The tone curve is loca ted in the Tone Correction d ialog box, which
appears when you click the Tone Correction button in the
Preview window. The following section descr ibes how to use each
of the controls in the Tone Correction dialog box.
Tone Correction button
1-16 Scanning Basics
Tone Correction dialog box
Tone Curve Name list
Use this list box to select a preset tone curve. The following six
preset tone curves are available, and you can add your own curves
to the list using the procedure described in the next section,
“Saving your own tone curve” on page 1-19.
Curve
Name
Linear 245 192 128 64 8 Default curve
Lighten 245 193 133 74 4 Lightens dark
Darken 245 152 82 38 11 Darkens bright
Flat
Contrast
High
Contrast
Open
Shadow
Highlight 1/4
Tone
245 182 129 72 2 Reduces
245 204 129 51 2 Increases
245 193 129 80 5 Lightens dark
Midtone 3/4
Tone
Shadow Description
image
image
contrast
contrast
shadows
Scanning Basics 1-17
When you select a curve from the Tone Curve Name list, the
settings in the Tone Correction dialog box change accordingly.
Channels
Click an option button under Channel s to select the color whose
tone curve you want to adjust. When the master channel at the
top is selected, your adjustments affect all three colors. Select ing
one of the other channels allows you to adj ust red, green, or blue
only.
Tone curve editor
Moving the pointer into the tone curve editor causes it to cha nge
to a finger. Use this pointer to drag any of the five points on the
curve and change its shape. The x-axis of the curve is the
brightness of the original (input values) while the y-axis is the
brightness of the scanned image (output values).
To change the tone curve back to its default, select Linear from
the Tone Curve Name list.
Output valu es
These are the current values for output data according to the
current locations of the points inside the tone curve edit or. These
values change when you drag points in the t one cur ve edit or , or
you can enter values here to change the shape of the tone curve.
Each value can be adjusted within the range of 0 to 255.
Note:
❏ Each output value name has a check box to the left of it. Highlight
and Shadow are always selected, but you can select or clear 1/4 Tone,
Midtone, and 3/4 Tone by clicking their check boxes.
❏ When a value’s check box is clear, its point on the tone curve editor
automatically shifts to smooth out the tone curve when one of the
other points is moved.
❏ When a value’s check box is selected, it means that its point is fixed
and it will not shift when other points are moved.
1-18 Scanning Basics
Saving your own tone curve
Use the following procedur e to assign a name t o a tone curve you
have customized and want to save for later use.
1. Modify the tone curve settings as desired. The name shown
in the Tone Curve Name list changes to User Defined.
2. After customizing the tone curve, enter a name for the new
curve (up to 32 characters) in the list box.
3. Click Save to save your new tone curve settings.
Deleting a customized tone curve
Use the following procedure to delete a custom tone curve. You
cannot, however, delete the six preset tone patterns.
1. Select a custom tone curve from the Tone Curve Name list.
2. Click Delete.
3. When a dialog box appears, click Yes to delete the curve.
Closing the Tone Correction dialog box
You can close the Tone Correction dialog box by clicking either
OK or Cancel.
❏ Clicking OK applies the current Tone Correction dialog box
settings and closes the dialog box. Clicking the close button
has the same effect as clicking OK.
❏ Clicking Cancel closes the dialog box without applying the
current dialog box settings.
Scanning Basics 1-19
Optimizing OCR Scanning
This section gives you suggestions a nd recommended settings in
order to improve OCR (Optical Character Recognition) sca nning
results.
Scanning text
Make sure you select Black & White for Image Type in the main
window.
If the recognition rate is not satisfactory with the def ault settings,
use the following steps to change the settings.
Improving character recognition
1. In the main window, make sure Black & White is selected in
the Image Type list box.
2. Click Preview. Then click the Image Controls button in the
Preview window to display the Image Controls dialog box.
1-20 Scanning Basics
Image Controls button
Image Controls dialog box
3. Use the Threshold slider to change the threshold value,
monitoring the results of your changes in the Preview
window. Adjusting the thre shold value can make it easier for
OCR to recognize characters.
If you still have problems...
1. In the main window, increase the Resolution value to 400.
Remember that scanning at a higher resolution takes more
time and may not greatly increase the recognition rate.
2. If you still have problems, try us ing the enhancement tools in
your OCR software to make adjustments.
Scanning Basics 1-21
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