User manual VISIONEER ONETOUCH 8820 INSTALLATION GUIDE

[. . . ] Visioneer® OneTouch® 8820 Scanner FOR USB CONNECTION Installation Guide COPYRIGHT INFORMATION Copyright © 2001 Visioneer, Inc. , a wholly owned subsidiary of Primax Electronics LTD. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. The Visioneer brand name and logo are registered trademarks of Primax Electronics LTD. The PaperPort brand name and logo are registered trademarks of ScanSoft, Inc. [. . . ] For example, if you put a photo in the middle of the glass, the scanner will automatically determine the size of the photo. When AutoCrop is selected, the scanner makes two passes--the first pass senses the item's size, and the second pass scans the image. DeScreen--Select this option when scanning a picture from a newspaper or magazine article, or other item that contains images with patterns or dots. Scans of patterns or dots sometimes have a distorted or wavy appearance. The scanner scans the item to compensate for the patterns and dots, and produces a clearer image. Gamma--Drag the slider to improve how the colors in a scanned image look on your monitor. Because the computer cannot always transmit the exact color information to the hardware, you may have to make some color adjustments using the Gamma feature. The default Gamma setting works fine in most cases and normally does not need to be adjusted. CONFIGURING THE SCANNER 31 6. If a JPEG tab is available, click it to select image compression settings. Please see "About JPEG Compression" on page 32 for information about the JPEG settings. Enable hardware compression (JPEG) --Click to make the JPEG compression options active. Minimize Image Size (Maximum compression)--Select this option to produce the smallest file size for the image; image quality is lowest. Best Image Quality--Select this option to produce the best quality image; file size is larger. Custom Quality Factor--Set your own choice for file size and image quality. Enter a number in the Quality Factor box or drag the slider to set the Quality Factor. Restore Defaults--Click to return the slider and Custom Quality Factor to their original settings 7. Make sure the configuration you just defined is selected. 32 VISIONEER ONETOUCH 8820 SCANNER INSTALLATION GUIDE 8. The new configuration and its adjusted settings now apply to the button whose tab is selected at the top of the Configuration dialog box. Note: If you select the Copy/Print or Fax button, the dialog box for editing and adjusting the settings will have a Device tab for selecting options for a printer or copier. See the Help for more information. ABOUT JPEG COMPRESSION Scanned graphics, photos, and other images can sometimes produce large files. The JPEG options for scanning reduce the file size by compressing the image electronically. Therefore, compressing an image involves a trade-off between image quality and file size. In many cases, loss of quality due to compression is not readily apparent, but the amount of compression you select--if any--depends on the quality you want. [. . . ] If you want to remove the selected area and start over, click Remove on the Scan Info box. ADJUSTING THE SETTINGS ON THE SCAN MANAGER PRO 55 SAVING A CUSTOM SIZE If you have several items of the same size, such as a group of small photographs, you can create a custom size and reuse it whenever scanning those items. Select it in the list to automatically reuse the custom size. 56 VISIONEER ONETOUCH 8820 SCANNER INSTALLATION GUIDE THE SCAN INFO BOX The following figure shows the information on the Scan Info box: Physical size of the image to scan. Size of the file of the scanned image Amount of space on your computer's hard drive. ZOOMING IN AND OUT You enlarge or reduce the preview image by zooming in or out. To return the image to its full size, click the Pointer button directly above the Zoom button, put the pointer on the image and click the right mouse button. [. . . ]