User manual EPSON GT-7000

[. . . ] 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 purchaser or third parties as a result of: accident, misuse, or abuse of this product or unauthorized modifications, repairs, or alterations to this product. [. . . ] Use the preview feature to check the results of your settings. preview button zoom preview button 4 t To preview the entire image, click the preview button. t To preview a part of the image that is already in the Preview window, click and drag the mouse over the area you want to see in detail, and click the zoom preview button. t You cannot preview an image that exceeds available memory or disk space. If you attempt to preview an image that is too large, an alert appears on the screen. t When the mouse pointer is placed within the marquee (the frame of the selected image area), the mouse pointer changes to a hand icon. You can click and drag the marquee anywhere in the Preview window. Understanding EPSON TWAIN Features 4-5 t When the mouse pointer is placed on the edge of the marquee, it changes to an arrow allowing you to resize the marquee. t To remove or delete a marquee, double-click the preview image. Modifying the preview image Preview window You can see the effects of the following settings in the preview image. t Pixel Depth, Halftone, and Dropout in the Image Type dialog box t Exposure, Gamma, Highlight, Shadow, and Threshold in the Image Controls dialog box t Tone Correction in the Tone Correction dialog box 4-6 Understanding EPSON TWAIN Features t Gray Balance Intensity, and Saturation in the Color Adjustment dialog box t Auto Exposure Although the image in the Preview window changes as you make settings, the settings do not affect the actual image until you scan, or rescan, the image. Document Source When using the document table of the scanner, leave the Document Source set to Flatbed. Other selections which may also be available are ADF (for the optional Automatic Document Feeder), and TPU for Neg. Film (for the Film Adapter optional for GT-7000 PHOTO), depending on whether you have installed these options. Uninstalled options are not displayed. 4 Flatbed: Select this setting to use the document table of the scanner. ADF: Select this setting to use the optional Automatic Document Feeder. Understanding EPSON TWAIN Features 4-7 TPU for Neg. Film, and if you are scanning positive film (or slides), select the TPU for Pos. Film setting. Image Type Use the Image Type list or button to select the type of image to be scanned. Image Type button Image Type list (predefined settings) Image Type list The Image Type list provides the following predefined settings. EPSON recommends you use the predefined settings first, then later improve the quality of the scanned image manually by making the detailed settings described in the next pages, if necessary. Color Photo: 24-bit Color, best quality, and 1-pass scanning sequence 256 Colors: 256 Colors and best quality 4-8 Understanding EPSON TWAIN Features Black & White Photo: 8-bit Gray and best quality Line Art: Black and white, and draft quality OCR: Black and white, best quality, and Text Enhancement Technology Copy/Fax: Black and white, hard halftone, draft quality, and Auto Area Segmentation 4 Image Type button The Image Type button allows you to customize the Image Type settings. If you want to make many detailed settings manually, use this feature. Click the Image Type button, and the following dialog box appears. Understanding EPSON TWAIN Features 4-9 Image Type Name: Names of predefined settings and custom settings you have saved appear in the Image Type Name list. Pixel Depth: Select scanning colors from: 24-bit Color, 256 Colors, 8-bit Gray, and Black & White. Halftone: Select a halftone or dither setting to reproduce images using special dot patterns: Mode A (Hard Tone), Mode B (Soft Tone), Mode C (Net Screen), Dither A (4 x 4 Bayer), Dither B (4 x 4 Spiral), Dither C (4 x 4 Net Screen), Dither D (8 x 4 Net Screen), or None. Halftone is available only when Pixel Depth is set to Black & White. Available dropout options are: None, Red, Green, and Blue. t Dropout is available only when Pixel Depth is set to 8-bit Gray or Black & White. t Depending on the image you scan, you may need to adjust the Threshold setting in the Image Controls dialog box to enable this feature. 4-10 Understanding EPSON TWAIN Features Quality & de-screening: Select a scanning quality: Draft & fast or Best & de-screening. When the Quality & de-screening option is selected, unwanted moiré patterns are automatically removed from scanned images. B/W Options: Select from : Text Enhancement Technology, Auto Area Segmentation, or None. [. . . ] A pixel is represented by a single bit of digital data that can express only 1 (light) or 0 (dark). A bit can represent two values, on and off, or 1 and 0. bit/pixel The unit that indicates the number of bits allocated for a pixel. The larger the value, the more detail a pixel can represent. browser A program which allows a person to read hypertext. The browser gives some means of viewing the contents of nodes (or "pages") and of navigating from one node to another. byte A unit of information consisting of eight bits. [. . . ]