User manual AVISION AV220C2

[. . . ] Sheet-fed Duplex Scanner User's Manual Regulatory model: 300500003 Avision Inc. Trademarks Microsoft is a U. S. IBM, PC, AT, XT are registered trademarks of International Business Machines Corp. Other brands and product names herein are trademarks or registered trademarks of their respective holders. No part of this publication may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or computer language, in any form or by any means, electronic, mechanical, magnetic, optical, chemical, manual, or otherwise, without the prior written permission of Avision Inc. [. . . ] Be aware that greater resolution takes more time to scan, and more disk space for the scanning image. For your information, an A4 size color image scanned at 300 dpi at True Color mode consumes approximately 25 MB of disk space. A higher resolution (usually means over 600 dpi) is only recommended when you need to scan a small area at True Color mode. Or you may choose your desired value by clicking the box in the right side of the drop down list and press the arrow key to select your desired value and then click the Add button to include it in the drop down list. Resolution: 75 dpi Resolution: 150 dpi 4-10 User's Manual Invert Reverses the brightness and the colors in the image. For color images, each pixel will be changed into its complementary color at the command of Invert. Black on White White on Black 4-11 Scan Source Choice: Auto Document Feeder: Used to scan multiple pages. For example, pages from newspaper clipping, paper with wrinkles or curls. If Automatic is selected and there is document in both the auto document feeder (ADF) and the flatbed, then the scan source will be automatically set to ADF. If Automatic is selected and there is document only in flatbed, then the scan source will be set to flatbed. Note the options vary based on type of scanner. 4. 2. 3 Scanning color images The following options are available for scanning color images. Brightness Contrast Resolution Invert 4. 2. 4 Scanning grayscale images The following options are available for scanning gray images. Brightness Contrast Resolution Invert 4-12 User's Manual 4. 2. 5 Scanning B&W images The following options are available for scanning B&W images. Binarization (Dynamic Threshold) Resolution Invert Or Binarization (Fix Processing) Threshold Brightness Resolution Invert 4-13 4. 3 The Compression Tab The Compression tab allows you to compress your scanned image and choose the level of compression. Bi-tonal images are normally compressed using CCITT standard called Group 4 (G4). Color and grayscale images are often compressed using JPEG technology. Move the JPEG Quality slider to the right or left to increase or decrease the level of compression. If your image editing application does not support the type of compression format, then either a warning message will appear or the image quality of the compressed file will not be acceptable. This group developed and lent their name to a file compression standard for color and grayscale images that is widely used by scanners, and software applications. On Microsoft Windows-based systems, a file with the extension . jpg has normally been compressed using this standard. For scanning color or gray images, the following compressions are available: None JPEG For scanning B&W images, the following compressions are available: None G4 4-14 User's Manual The Compression tab dialog box 4-15 4. 4 The Color Dropout Tab 4. 4. 1 Color Dropout Selection Color Dropout tab allows you to drop either of the red, blue, or green color in your scanned image. If your image contains red color watermark or background, choose the R (Red) channel then any red watermark or background will be removed. This feature is used to sharpen your text when using OCR (Optical Character Recognition) software. Note that this function supports only black & white and gray images. [. . . ] If this occurs please follow the cleaning procedures to return your machine to its original state. The Cleaning Procedures 1) 2) Soak a cotton swab with some isopropyl alcohol. Rotate the roller forward with your finger and repeat the cleaning steps above until the entire roller is cleaned. Wipe the pad in one direction from top to bottom or the other way around. [. . . ]