24 Jan
2022
24 Jan
'22
5:10 p.m.
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