hoi,

ik denk dat handigst is om pnmtopng over output heen te halen, 
die gaat automatisch van 16m naar color-mapped als nodig, 


[EMAIL PROTECTED] lilypond]$ pngtopnm < typography-demo.png  | pnmtopng 
-compression 9  > pbm.png
[EMAIL PROTECTED] lilypond]$ ls -l typography-demo.png pbm.png
-rw-rw-r-- 1 lilydev lilypond 32282 Dec 17 17:07 pbm.png
-rw-rw-r-- 1 lilydev lilypond 69774 Dec 17 16:40 typography-demo.png
[EMAIL PROTECTED] lilypond]$ file typography-demo.png pbm.png
typography-demo.png: PNG image data, 859 x 1111, 8-bit/color RGB, non-interlaced
pbm.png:             PNG image data, 859 x 1111, 8-bit colormap, non-interlaced
[EMAIL PROTECTED] lilypond]$ 



-- 
 Han-Wen Nienhuys - [EMAIL PROTECTED] - http://www.xs4all.nl/~hanwen



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