[comp.windows.x] Wanted Gray Scale Bitmaps

h4enajb0@wesim3.lcs.mit.EDU ("BALLARD,J") (11/30/90)

  I am looking for a good set of bitmaps I can use on a 
  monochrome X-server to emulate gray shades.  I already have 
  a good set of 10 different shades but I really need a larger set,
  perhaps 32 to 64 shades.

  Let me know if there is a place I can anonymous ftp these from or
  just mail me your best set.  Any kind of help is appreciated.

  Send mail to: ballard@mc1.wes.army.mil
                     or
                h4enajb0@larry.wes.army.mil

  Thanks,
    -Jerry

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etaylor@wilkins.iaims.bcm.tmc.edu (Eric Taylor) (12/01/90)

Well, you can only get so precise with your shades.
The more shades you get, the bigger the pixmaps have
to be and the farther you have to be from your screen.

You could use the Floyd-Steinberg algorithm to
generate your shades.  Look at xloadimage for details.

i.e.  Use a pixmap (say 64x64) and modify
the Floyd-Steinberg algorithm to try applying a single
gray level value to each pixel.  You will get very
pleasing results since the F&S algorithm will minimize
the contact between black values in your shade.
--
					Eric Taylor
					Baylor College of Medicine
					etaylor@wilkins.bcm.tmc.edu
					(713) 798-3776