[comp.sys.mac] Colors/greys to numbers? H E L P ! ! ! ! !

mjkobb@mit-amt.MEDIA.MIT.EDU (Michael J Kobb) (03/03/90)

Greetings,

  A friend of mine (former teacher, in fact) is contemplating doing a mural
project, and wants to achieve a "posterized mosaic" effect.  What he was
planning to do was use a scanner to scan in the original art, dither it down
to, say, 16 colors, maybe pull the resolution down some, and then print it to
overheads to project onto the panels.  The painting would be done by students
in his class.

  The question, however, is:  is it possible somehow to print, instead of
colors or greyscales, a simple numerical value, so that you get, effectively,
a paint-by-numbers drawing (outlines with the fill color indicated by #)?
This would make the painting job much, much easier for the students, and would
cut the production time a lot.

  Anybody got any ideas?  Can PostScript be convinced to print the number of
the color in the CLUT instead of a color/grey?  Is there an application around
that would be able to do that?

  While on the subject, does anybody know of any good software for doing
posterizing and mosaic effects on color images (or greyscaled if no color's
around)?  I'd assume that you could do the posterizing with the scanner by
just having it scan in 4-bit color, but how about the mosaic?

Many thanks for any help anyone can provide!

--Mike