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2008.12.19 03:59 "Re: Project on .bmp to .gif", by Bob Friesenhahn
On Fri, 19 Dec 2008, navneet rastogi wrote: > I think to convert this 24 bits data,for this we uses color table > but how we make it ,how many enteries it contains.is 8 bits enteries > is sufficient for this? How is the approximation done in case when > the color table is full and there are still more colors left in the > image? This is how it is done in GraphicsMagick and ImageMagick: http://www.graphicsmagick.org/quantize.html The algorithm is not specific to TIFF. The 'tiffmedian' utility comes with libtiff and provides a fast way to reduce colors using a different algorithm. Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/