Returns in the integers pointed to by 'pr, 'pg', 'pb' the R-G-B values of the image's colormap entry 'i'
Returns in the integers pointed to by 'pr, 'pg', 'pb' the R-G-B values of the image's colormap entry 'i'. Works only with colormap based images (nplanes: 2,4,8).
Copyright 1996-1998 Vincenzo Morello
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