User manual AVISION AV8300

[. . . ] User's Manual Document Imaging Scanner Avision Inc. (D/N: 250-0505-E Rev. IBM, PC, AT, and XT are registered trademarks of International Business Machines Corp. Other brands and product names herein are trademarks or registered trademarks of their respective holders. Copyright All rights reserved. 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. [. . . ] Since Halftone is one type of black and white image, the disk space required to save a halftone image is 1/24 of that required to save a 24-bit true color image. Halftone Image 6-7 8-Bit Gray A single-channel image gray. An 8-bit scanner shades of gray between this option if you are consists of at least 256 shades of produces a grayscale image with 1024 pure black and pure white. Choose scanning black-and-white photographs. With 8 bits of color information per pixel, the file size of an image is eight times larger than a Black and White image and 1/3 the size of a 24-Bit Color image. Gray Image 6-8 8-Bit Color An 8-Bit Color image provides 256 color hues in the image. The file size of a 256 color image is 1/3 the size of a 24Bit Color image. 8-Bit Color Image 6-9 24-Bit Color A 24-Bit Color image consists of three 8-bit color channels. The red, green, and blue channels are mixed together to create a combination of one billion colors, which give a more true-to-life quality to the image. Choose 24-Bit Color if you are scanning color photos. 24-Bit Color Image 6-10 6. 4 ENHANCING YOUR IMAGE Brightness: Adjusts the lightness or darkness of an image. The higher the value, the brighter the image. 6-11 6. 5 CONTRAST Adjusts the range between the darkest and the lightest shades in the image. The higher the contrast, the bigger the different gray scales. 6-12 6. 6 INVERT IMAGE The invert command reverses the brightness and the color in the image. For color images, each pixel will be changed into its complementary color at the command of Invert. Original 6-13 6. 7 MIRROR Click on the Mirror button to reverse the image (create a mirror image). Mirror function is off Mirror function is on 6-14 6. 8 PREVIEW AUTO-AREA: Clicking on the Preview Auto-Area button automatically crops the preview scan area to the previewed document. This will then be the cropping area for all of the scanned documents. 6. 9 PAPER SIZE: Select a size on the Paper Size list of frequently used scan sizes, including business card, 5 x 3 in. , 6 x 4 in. , Letter, Legal, B5, A5, A4, A3, or your current scan area to perform an immediate selection of your scan size. 6. 10 UNITS The Units button indicates the measuring system that is in use (Inch, Cm, or Pixel). 6-15 6. 11 DESCREEN Click on the Descreen button to access a drop-down menu that allows you to specify the type of document you are scanning in order to eliminate the moiré pattern* commonly found in printed matter. You can specify Newspaper, Magazine, or Catalog. Before Descreen After Descreen 6-16 *Moiré pattern--an undesirable pattern resulting from the incorrect screen angle of the overprinting halftone. 6. 12 SHARPEN Click on the Sharpen button to access a drop-down menu that allows you to specify a level to sharpen the scanned image. You can specify a Sharpen setting of Light, More, Heavy, or Extra Heavy. 6. 13 COLOR ADJUSTMENT Click on the Color Adjustment button to enable the button for the Hue, Saturation, and Lightness feature. NOTE: The Advanced Settings button must be enabled in order to use the Hue Saturation, and Lightness feature. 6-17 6. 14 AUTO LEVEL Click on the Auto Level button to add shadow to reveal more details in an image. 6. 15 ADVANCED SETTINGS Click on the Advanced Settings button to view the advanced settings buttons for Highlight / Shadow, Curves, Color Balance, Hue / Saturation / Lightness, Color Drop-out, and Custom Settings (six buttons on the right side of the TWAIN dialog box). Highlight / Shadow This feature is available when 8-Bit Gray, 8-Bit Color, or 24-Bit Color is selected on the Image Type drop-down menu. Highlight refers the lightest point in a scanned image; shadow refers the darkest point. Click on the Highlight / Shadow button to access the Highlight / Shadow Levels dialog box. You can type values in the text boxes or you can place the mouse cursor over the line, click the right mouse button, and drag the line to specify the values you want. 6-18 Use the Highlight and Shadow settings together to extend the range of color and reveal more details in a color image. 6-2 6. 16 CURVES When you select the Curves button, a dialog box appears that allows you to adjust the midtone of the image without losing details in the lightest and darkest areas. Select the Curve or Line button, depending on if you want a curved or an angled setting. Place the mouse cursor over the line, click the right mouse button, and drag the line to set the curve you want. 6-3 6. 17 COLOR BALANCE When you select the Color Balance button, a dialog box appears that allows you to adjust the color of the image so that it comes close to that of the original. You can type values in the Color Levels text boxes or you can drag the sliding arrow under the color. 6-4 Hue /Saturation /Lightness Click on this button to adjust the hue, saturation, and lightness of an image. You can type values in the text boxes or you can drag the sliding arrow under the each item. Hue--specify a value in the Hue box to adjust the hue up to 360° by clicking on the desired color on the color wheel or selecting a setting on the dropdown menu. Note that the level of intensity for a color simultaneously changes when the hue adjustment is made. Saturation--specifies a value in the Saturation box to adjust the saturation level of the color. [. . . ] In this case, it is highly recommended to replace the pad module with a new one. For ordering the pad module, please consult your nearest dealer and follow the procedure in below to replace it. Remove the ADF detachable pad module by pulling out the upper part of the pad clamp as shown in the figure below. Remove the ADF pad in this direction. Remove the pad module 8-3 9. TROUBLESHOOTING The scanner will automatically perform a simple self-test each time it is turned on. If you have problems with the operation of your scanner, please check the following troubleshooting hints. 9. 1 FREQUENTLY ASKED QUESTIONS Question: The LED indicates that the scanner is ready, but the scanner does not respond to the scan command form the host computer. [. . . ]