Xerox XDM5205DWU User Guide - Page 126

Scanning with the ISIS Interface To adjust the Custom Document settings: 1. Click the Custom Document button and click the Define button. The dialog box for Custom settings opens. Mode-Click the arrow and choose a scan mode. Black and White-The scanning pixels are all the same size and are either black or white. Use this setting for letters, memos, pen and ink drawings, and other black and white material. This setting produces the smallest file size for scanned items. 256-Level Gray-Scans the image using up to 256 true shades of gray. Use this setting to scan black and white photographs and other higher quality black and white images. You can also scan a color photo with this setting to turn its colors into gray shades. The file size is about one third the size of a color scan. 24-Bit Color-Scans the image in full color. Use this setting to scan color photographs and other color images. The file size is the largest of the scan mode options. Dither-Only available if the Mode is Black and White. Click the menu arrow and choose a Halftone option or Diffusion from the list. Halftone-Converts the image so it appears to consist of gray tones. Halftones produce simulated gray tones by using black and white pixels of different sizes and is often used to produce newspaper and magazine images. Use this setting for lower resolution black and white images. The halftone settings also produce small file sizes. Diffusion-Also converts the image to gray tones, but diffuses the grays to nearby pixels to give the image a grainy, film-like texture. Diffusion is useful for viewing images on a black-and-white screen.The preview image shows the effect of your Dither selection so you can see which one is best for scanning. DocuMate 520 Scanner User's Guide 121