��Dr E D F Williams�� <[EMAIL PROTECTED]> wrote�: > Processing 'jpeg' files with Photoshop, or any other program, is > inadvisable. Each time you save a file in this compressed format it changes > for the worse. After initial scanning the file should be saved in > Photoshop's own '.psd' format.
JPEG is a destructive compression algorithm. Each compression strips some data from the file. If you save the same file in JPEG format a few times, you will end up with a blurred image with very little data. There are also some non-destructive compression algorythms like LZW compression for TIFF Files. I always save my scanned files in TIFF format with LZW compression. Usually a 50 Meg Photoshop files results in a 25-30 Meg TIFF compressed file. TIFF files are also pretty very well handled by other graphics and dtp software and usually most people tend to import TIFF files in Xpress before print-outs. The only reason you really *have* to save in Photoshop format is for all the photoshop specific dtata stored in the file, like layers and text, and for images with duotones, tritones and such.
