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®
Color Image Scanner
All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SEIKO EPSON 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 contained herein.
Neither SEIKO EPSON CORPORATION nor its affiliates shall be liable to the purchaser of this product or third parties for damages, losses, costs, or expenses incurred by the purchaser or third parties as a result of: accident, misuse, or abuse of this product or unauthorized modifications, repairs, or alterations to this product.
SEIKO EPSON CORPORATION and its affiliates shall not be liable for 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 registered trademarks of International Business Machines Corporation. Apple, Macintosh, Mac, iMac, and Power Macintosh are registered trademarks of Apple Computer, Inc.
Microsoft and Windows are registered trademarks of Microsoft Corporation in the United States of America and other countries.
ISIS is a registered trademark of Pixel Translations, a Division of ActionPoint, Inc.
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. . . . . . . . . . . . . . . . . . . . . . . |
1-1 |
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 colors are different from those in the original
image.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 The printed image is larger or 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 contains 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 utility 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 divided into six chapters, with a glossary and index provided for your reference.
Chapter 1 describes the basic steps of scanning.
Chapter 2 provides a complete 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 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.It also contains customer support information. If your application does not operate 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 provide you with information on modifying EPSON TWAIN HS or EPSON TWAIN HS Network settings.
2 Introduction
Chapter 1
Scanning Basics
Main Window and Preview Window
EPSON TWAIN HS and EPSON TWAIN HS Network 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 guide are for the EPSON TWAIN HS, they also apply to EPSON TWAIN HS Network.
Scanning Basics |
1-1 |
Main window
The main window gives you access to the controls 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 available to give you greater control over your scanning image. Powerful tools 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.
Preview window
1-4 Scanning Basics
Manually optimizing images
To optimize images manually, 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 Highlight 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 adjustments
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 Preview 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. The Preview window is also the starting point for accessing the Image Controls, Color Adjustment, and Tone Correction dialog boxes that contain 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 dialog box with the image optimization tools you need.
Image Controls button
Tone Correction button
Color Adjustment button
1-6 Scanning Basics
Adjusting the Highlight Setting
Highlights are the brightest areas of an image.
1.In the Image Controls dialog 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 to the location you want to select as the highlight point and click it.
The brightness of the pixel at the point you click is set as the highlight level, and the other parts of the image are adjusted 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 dialog box, click the eyedropper button under Shadow.
The pointer changes to an eyedropper, with movement restricted to within the Preview window.
2.Move the eyedropper to the location you want to select 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 can enter a value between 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 in 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 Gamma 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 with 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 correction. Use this setting if you are satisfied with the tone of the preview image.
1-10 Scanning Basics
Lighten
Adjusts darker 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 1-16 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 the 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 Intensity slider.
3.To change the gray balance intensity level of the color, move the slider left or right, or enter a value in the text box.
You can enter a value between 0 and 100. Changing the value causes the color in the right hand box to change accordingly. The changes are also reflected in the image in the Preview window.
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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, while lower saturation makes it appear paler.
To change the saturation level 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.
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1-15 |
Using the Tone Curve
The tone curve provides you with a versatile means for adjusting the intensity of 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.
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 located in the Tone Correction dialog box, which appears when you click the Tone Correction button in the Preview window. The following section describes how to use each of the controls in the Tone Correction dialog box.
Tone Correction button
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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 |
Highlight |
1/4 |
Midtone |
3/4 |
Shadow |
Description |
Name |
|
Tone |
|
Tone |
|
|
|
|
|
|
|
|
|
Linear |
245 |
192 |
128 |
64 |
8 |
Default curve |
|
|
|
|
|
|
|
Lighten |
245 |
193 |
133 |
74 |
4 |
Lightens dark |
|
|
|
|
|
|
image |
|
|
|
|
|
|
|
Darken |
245 |
152 |
82 |
38 |
11 |
Darkens bright |
|
|
|
|
|
|
image |
|
|
|
|
|
|
|
Flat |
245 |
182 |
129 |
72 |
2 |
Reduces |
Contrast |
|
|
|
|
|
contrast |
|
|
|
|
|
|
|
High |
245 |
204 |
129 |
51 |
2 |
Increases |
Contrast |
|
|
|
|
|
contrast |
|
|
|
|
|
|
|
Open |
245 |
193 |
129 |
80 |
5 |
Lightens dark |
Shadow |
|
|
|
|
|
shadows |
|
|
|
|
|
|
|
Scanning Basics |
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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 adjustments affect all three colors. Selecting one of the other channels allows you to adjust red, green, or blue only.
Tone curve editor
Moving the pointer into the tone curve editor causes it to change 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 values
These are the current values for output data according to 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 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.
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Saving your own tone curve
Use the following procedure to assign a name to 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.
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1-19 |
Optimizing OCR Scanning
This section gives you suggestions and recommended settings in order to improve OCR (Optical Character Recognition) scanning 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 default 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.
Image Controls button
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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 threshold 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 using the enhancement tools in your OCR software to make adjustments.
Scanning Basics |
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