EPSON 1640XL User Manual
Scanner Software
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CORPORATION. No patent liability is assumed with respect to the use of the information
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.
SEIKO EPSON CORPORATION and its affiliates shall not be liable against any damages or
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.
EPSON is a registered trademark of SEIKO EPSON CORPORATION.
IBM and PS/2 are regi stered trademarks of Internat ional Business Machines Corporation.
Macintosh is a registered trademark of Apple Computer, Inc.
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Presto! is a trademark of New S oft T e ch n ol og y Corporation.
General Notice: Other product names used herein are for identification purposes only and may be
trademarks of their respective companies.
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. . . . . . . . . . . . . . . . . . . . . . .1-2
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 . . . . . . . . . . . . . . . .1-13
Adjusting the Saturation Setting. . . . . . . . . . . . . . . . . . . . . . . . . . .1-15
Using the Tone Curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15
Saving your own tone curve. . . . . . . . . . . . . . . . . . . . . . . . . .1-18
Deleting a customized tone curve . . . . . . . . . . . . . . . . . . . . .1-19
Closing the Tone Correction dialog box . . . . . . . . . . . . . . . .1-19
Optimizing OCR Scanning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19
Scanning text. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19
Improving character recognition . . . . . . . . . . . . . . . . . . . . . .1-20
If you still have problems.... . . . . . . . . . . . . . . . . . . . . . . . . . .1-21
Text difficult to recognize . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22
Contents 1
Chapter 2 Understanding EPSON TWAIN Pro Features
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
EPSON TWAIN Pro Main Window . . . . . . . . . . . . . . . . . . . . . . . 2-4
Document Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Image Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Image Type list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Image Type button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Destinations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Destination list. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Destination button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Changing Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Source and Target image sizes. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Preview Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Preview Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Zoom preview button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Return to full preview button . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Return to zoom preview button . . . . . . . . . . . . . . . . . . . . . . 2-22
Marquees and Marquee Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Making and modifying marquees . . . . . . . . . . . . . . . . . . . . 2-23
Delete marquee button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Duplicate marquee button. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Auto locate button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Marquee number indicator . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Adjust Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-29
Auto Exposure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
Image Controls. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
Tone Correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Color Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
Reset Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
Auto Focus . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
Manual Focus. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
Settings Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
Configuration Button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42
Scan Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
Scan All Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
2 Contents
Chapter 3 Calibrating Your System
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-2
Calibrating Your Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-3
For Windows 2000 and 98 users. . . . . . . . . . . . . . . . . . . . . . .3-3
For Windows 95 and NT 4.0 users: . . . . . . . . . . . . . . . . . . . .3-5
For Macintosh users. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-7
Using ICM (For Windows 2000, 98, and 95 Users). . . . . . . . . . . .3-8
For Windows 2000 and 98 users. . . . . . . . . . . . . . . . . . . . . . .3-8
For Windows 95 users . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3-9
Using ColorSync (For Macintosh Users) . . . . . . . . . . . . . . . . . . . .3-10
Chapter 4 Maintenance and Troubleshooting
Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Cleaning the scanner . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-2
Replacing the fluorescent lamp . . . . . . . . . . . . . . . . . . . . . . .4-3
Transporting the Scanner and the Transparency Unit. . . . . . . . .4-4
Problems and Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-5
Error indicator. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-6
Operating problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-7
Quality problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-8
Software setup problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-12
Scanning problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-14
Software operation problems . . . . . . . . . . . . . . . . . . . . . . . . .4-15
Paper jams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-16
Changing the SCSI ID number or SCSI board . . . . . . . . . . .4-16
Changing USB connections ports. . . . . . . . . . . . . . . . . . . . . .4-18
Recovering from scanner software installation problems
on Windows 2000 and Windows 98 . . . . . . . . . . . . . . . . .4-19
Sizing up your system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-23
Contents 3
Appendix A Technical Specifications
Scanning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Electrical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Safety Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
CE marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5
SCSI Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6
USB Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
Option Interface Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Initialization Methods . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Transparency Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
Automatic Document Feeder . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-11
IEEE 1394 Scanner I/F Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-12
Appendix B Contacting Customer Support
Glossary
Index
4 Contents
Introduction
Features
The CD-ROM that comes with your scanner contai ns the EPSON
scanner software suite, including EPSON TWAIN Pro and
TWAIN Pro Network (The network version of EPSON TWAIN
Pro). The software suite is the perfect companion for your EPSON
scanner. Using your scanner and the software on the CD-ROM,
you can scan images in color, grayscale, or black and white, and
save them as files or print them out. Other software such as
EPSON Scanner Monitor and PageManager for EPSON support
the Start Button feature to make scanning much easier. EPSON
Scan Server allows your scanner to be used over a network.
❏ The software supports the following EPSON scanners:
EPSON EXPRESSION 1640XL
❏ EPSON TWAIN Pro and EPSON TWAIN Pro 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 Scanner Monitor allows your scanner to access
software that supports the Start Button feature.
❏ EPSON Screen Calibration utili ty allows you to calibrate your
scanner and monitor to reproduce images identical to the
originals.
Introduction 1
❏ PageManager for EPSON is TWAIN-compliant sof tware that
supports the Start Button feature. This feature allows you to
scan and send data to a target application with a single push
of the Start button. For more information on PageManager,
see your PageManager documentation.
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 explains the basic steps of scanning.
❏ Chapter 2 provides a comp lete description of EPSON TWAIN
Pro and TWAIN Pro Network features. Refer to Chapter 2
when making scanning settings.
❏ Chapter 3 explains how to calibrate your monitor to match
your EPSON scanner. If you notice that colors on your screen
or in your printout do not match the original image, see this
chapter.
❏ Chapter 4 contains maintenance and troubleshooting
information. If your software does not operate properly or
scanned images are not what you expect, see this chapter.
❏ Appendix A contains various specification information.
❏ Appendix B contains customer support information.
Notes contain important information and useful tips about your
scanner and software.
To set up and use the scanner, see your scanner’s User’s Guide.
EPSON TWAIN Pro and EPSON TWAIN Pro Network online
help can also provide you with information on making settings
in EPSON TWAIN Pro or EPSON TWAIN Pro Network.
2 Introduction
Chapter 1
Scanning Basics
Main Window and Preview Window. . . . . . . . . . . . . . . . . . . . . . .1-2
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 . . . . . . . . . . . . . . . .1-13
Adjusting the Saturation Setting. . . . . . . . . . . . . . . . . . . . . . . . . . .1-15
Using the Tone Curve. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-15
Saving your own tone curve. . . . . . . . . . . . . . . . . . . . . . . . . .1-18
Deleting a customized tone curve . . . . . . . . . . . . . . . . . . . . .1-19
Closing the Tone Correction dialog box . . . . . . . . . . . . . . . .1-19
Optimizing OCR Scanning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19
Scanning text. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-19
Improving character recognition . . . . . . . . . . . . . . . . . . . . . .1-20
If you still have problems.... . . . . . . . . . . . . . . . . . . . . . . . . . .1-21
Text difficult to recognize . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22
Scanning Basics 1-1
Main Window and Preview Wind ow
EPSON TWAIN Pro and EPSON TWAIN Pr o Network have two
main windows. The EPSON TWAIN Pr o windo w or the EPS ON
TWAIN Pro 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 Pro and EPSON TWAIN Pro Network.
Although most of the illustrations and explanations in this guide are for
the EPSON TWAIN Pro, they also apply to EPSON TWAIN Pro
Network.
Main window
1-2 Scanning Basics
The main window gives you a ccess to the controls, where you can
make basic settings, such as Document Source, the type of the
material you are scanning, how you are scanning, output
destination, 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 t he Preview
window and display the preview images in the window.
Preview window
In the Preview window, there are more options ava ilable to give
you greater controls ove r your scanning image. Powerful tools are
available to help you adjust tones, colors, focus and other
elements to optimize your images.
Scanning Basics 1-3
Optimizing Image Scanning
EPSON TWAIN Pro 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 EPSON TW AIN Pro’s Preview window. This
section provides general information on optimizi ng images with
these tools.
EPSON TWAIN Pro Preview window
Note for Macintosh users:
Most illustrations shown in this section are for Windows, so they may
vary in appearance from what actually appears on your screen. The
instructions are the same, except as noted.
1-4 Scanning Basics
Manually optimizing images
To optimize images manua lly, adjust the following EPSON
TWAIN Pro 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 1-13.
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 1-15.
To make the following adjustments in EPSON TWAIN Pro, 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 EPSON TWAIN Pro Preview window shows you how your
adjustments will affect the image as you make them. The Preview
window is also the starting p oint for accessing the Image Controls,
Tone Correction, and Color Adjustment dialog boxes that contai n
tools for optimizing your image.
Note:
See “Preview Window” on page 2-19 for Preview window options, and
“Configuration Button” on page 2-42 for information about how to
control preview image quality.
1. After selecting the Docum e nt Source, Image Ty pe, and
Destination 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.
Note:
Make sure the Fast Preview check box is clear in the Configuration
dialog box to ensure a high-quality preview.
2. Click one of the buttons below to open the d ialog box with the
image optimization tools you need.
1-6 Scanning Basics
Image Controls button
Color Adjustment button
Tone Correction 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 2-30 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 then click.
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 2-30 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.
To change the gamma level of the image, move the Gamm a slider
left or right, or enter a value in the text box.
Scanning Basics 1-9
You can enter a value between 50 and 500 for the gamma.
Note:
See “Image Controls” on page 2-30 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 with the Auto Exposure funct ion
or 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.
1-10 Scanning Basics
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.
1-12 Scanning Basics
Open Shadow
Improves details in the dark areas of images.
Note:
See “Using the Tone Curve” on page 1-15 and “Tone Correction” on
page 2-33 for more information on tone correction.
Adjusting the Gray Balance Intensity Setting
Gray balance makes it possible to remove a cast (tint) from a
specific color.
Scanning Basics 1-13
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 a location that contains the color
whose gray balance intensity you want to adjust, and then
click.
The color you selected appears in the two boxes below the
Gray Balance Inten si ty slider.
3. To change the gray balance intensity level of the color you
selected, 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.
Your changes are also reflected in the image in the Preview
window.
Note:
See “Color Adjustment” on page 2-35 for more information on
adjusting the gray bala nce intensity level.
1-14 Scanning Basics
Adjusting the Saturation Setting
Saturation is the density of a color. Higher saturation makes the
color appear richer, while lower saturation makes it appear paler.
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 2-35 for more information on adjusting
the saturation level.
Using the Tone Curv e
The tone curve provides you wit h a versatile means for adjus ting
the intensity of the colors of the image being scanned. You can
adjust the shadow, mid-tone, and highlight values, which helps
to ensure well-balanced coloring of the image.
Scanning Basics 1-15
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 Auto Exposure and the Image Controls dialog box.
Use of the tone curve to make initial settings is not recommended.
❏ The Tone Correction button is unavailable whenever Black &
White is selected as the Pixel Depth and None is selected for the
Halftone.
The tone curve is loca ted in the Tone Correction d ialog box, which
appears when you click the T one Correction button in the EPSON
TWAIN Pro’s Preview Window. How to use each of the c ontrol s
in the Tone Correction dialog box is described below.
Tone Correction button
1-16 Scanning Basics
Tone Correction dialog box
Tone Curve Name list
Use this list box to select a pre set tone curve. There ar e six preset
tone curves shown below, and you can add your own curves to
the list using the procedure in the next secti on, “Saving your own
tone curve.”
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
Flat
Contrast
High
Contrast
Open
Shadow
Highlight1/4
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
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 channels to select the color whose
tone curve you want to adjust. When the master channel at the
top is selected, your adjustment s affect a ll three colors. Selecting
one of the other channels allows you to adjust red, green, or blue
only.
image
bright image
contrast
contrast
shadows
Tone curve editor
Moving the mouse pointer into t he t one curve editor causes it to
change to a finger. Use this pointer to dra g any of the five poin ts
in 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).
Scanning Basics 1-17
To change the tone curve back to its default, select Linear in the
Tone Curve Name list.
Output valu es
These are the current values for output data in accordance with
the current locations of the points inside the tone curve editor.
These values change when you drag points in the tone curve
editor, or you can enter i n values here t o change t he shape of t he
tone curve. Each value can be ad justed within the range of 0 to 25 5.
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.
Saving your own tone curve
Use the following procedure to assign a name to a tone curve you
customized an d to save it for lat er use:
1. Make the tone curve settings you want. This c auses the name
shown in the Tone Curve Name list to change 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 under the
name you specified.
1-18 Scanning Basics
Deleting a customized tone curve
Use the following procedure to delete a custom tone curve. You
cannot delete the six preset tone patterns.
1. Use the Tone Curve Name list to sele ct the custom tone curve
you want to delete.
2. Click Delete.
3. In the confirmation dialog box that 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 Cancel closes the dialog box without applying the
current dialog box settings.
Optimizing OCR Scanning
This section gives you suggestions and r ecommended settings in
order to improve OCR (optical character recognition) scanning
results.
Scanning text
Make sure you select OCR for b oth Image Type and Destination
in the EPSON TWAIN Pro main window.
Scanning Basics 1-19
If the recognition rate is not satisfactory with the def ault settings,
follow these steps to change settings:
Improving character recognition
1. In the EPSON TWAIN Pro main window, mak e sure OCR is
selected in both the Image Type and Destination list boxes.
Then click the Image Type button. The Image Type dialog
box appears.
2. In the Image Type dialog box, select None for B/W Option,
and then click OK.
3. In the EPSON TWAIN Pro window, click Preview . Then click
the Image Controls button to display the Image Controls
dialog box.
Image Controls button
1-20 Scanning Basics
Image Controls dialog box
4. 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 EPSON TWAIN Pro window, increase the Resolution
value to 400. Remember that scanning at higher resolution
takes longer and may not great ly 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
Text difficult to recognize
The quality of the text in your original document greatly effects
OCR results.
The following types of origin als can make reco gnition difficult
and should be av oided if possible:
❏ Items that have been copied from other copies
❏ Faxes
❏ Text with tightly-spaced characters or line pitch
❏ Text that is in tables or underlined
❏ Cursive or italic fonts, and font sizes less than 8 points
Remember that OCR software cannot recognize handwritten
characters.
1-22 Scanning Basics
Chapter 2
Understanding EPSON TWAIN Pro Features
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3
EPSON TWAIN Pro Main Window . . . . . . . . . . . . . . . . . . . . . . . .2-4
Document Sources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-5
Image Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
Image Type list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-7
Image Type button. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-8
Destinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-12
Destination list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-13
Destination button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-14
Changing Resolution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16
Source and Target image sizes. . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-16
Preview Window. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-19
Preview Buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-21
Zoom preview button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-21
Return to full preview button. . . . . . . . . . . . . . . . . . . . . . . . .2-22
Return to zoom preview button. . . . . . . . . . . . . . . . . . . . . . .2-22
Marquees and Marquee Buttons. . . . . . . . . . . . . . . . . . . . . . . . . . .2-23
Making and modifying marquees . . . . . . . . . . . . . . . . . . . . .2-23
Delete marquee button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-25
Duplicate marquee button . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26
Auto locate button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-26
Marquee number indicator. . . . . . . . . . . . . . . . . . . . . . . . . . .2-28
Adjust Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-29
Auto Exposure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-30
Image Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-30
Tone Correction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-33
Understanding EPSON TWAIN Pro Features 2-1
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