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GIFHISTO(1)		     GIFLIB Documentation		   GIFHISTO(1)

       gifhisto	- make a color histogram from GIF colr frequencies

       gifhisto	[-v] [-t] [-s width height] [-n	image-number] [-b] [-h]

       A program to create histogram of	number of pixels using each color. The
       output can be formatted into a GIF histogram file, or as	text file -
       both go to stdout.

       If no GIF file is given,	gifhisto will try to read a GIF	file from

	   Verbose mode	(show progress). Enables printout of running scan

	   Force output	to be text file	of the following form: (colormap size)
	   lines each containing two integers: number of times color appeared,
	   and color index. Lines are in increasing color index	order. This
	   output can be fed directly to a sort	program	if ordering by color
	   frequency is	desired.

	   The colormap	picked is the one to be	used for the image to generate
	   histogram for, as defined in	GIF format.

       -s width	height
	   Size	of GIF histogram file. The height of the histogram should be
	   power of 2 dividable	by number of colors in colormap.

	   Width sets the resolution (accuracy if you like) of the histogram
	   as the maximum histogram bar	is scaled to fit it.

       -n image-number
	   Image number	to test. Default is one.

	   Zeros the background	color count. As	only linear scale bars are
	   supported and usually the background	appears	much more often	then
	   other colors, deleting the background count will improve the
	   scaling of other colors.

	   Print one line of command line help,	similar	to Usage above.

       Gershon Elber

GIFLIB				  2 May	2012			   GIFHISTO(1)


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