> That's true generally. Anything other than actual photographs > (continuous tone images) should NOT be run through JPEG because JPEG > is not intended for, and unfit for, anything else. Printouts, line > drawings, and anything else with crisp edges between dark and light > will be messed up by JPEG. PNG and TIFF are examples of appropriate > compression schemes.
TIFF actually isn't a compression scheme, it's a tagged file format, and one _can_ specify jpeg compression of images in a TIFF file. Perhaps it would be better to say one should avoid _lossy_ compression schemes on scans with crisp edges or large areas of solid color. These are areas where jpeg will add visible noise. De
