gifhisto(1)						      General Commands Manual						       gifhisto(1)

NAME

       gifhisto  -  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.

USAGE

       gifhisto [-q] [-t] [-s Width Height] [-n ImageNumber] [-b] [-h] gif-file

       If no gif-file is given, GifHisto will try to read a GIF file from stdin.

MEMORY REQUIRED

       Line.

OPTIONS

       [-q]

	       Quiet mode.  Default off on MSDOS, on under UNIX. Controls printout of running scan lines.  Use -q- to invert.

       [-t]

	       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 colrmap 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 ImageNumber]

	       Image number to test.  Default is one.

       [-b]

	       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.

       [-h]

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

AUTHOR

       Gershon Elber

       Man page created by T.Gridel <tgridel@free.fr>, originally written by Eric S. Raymond <esr@thyrsus.com>

								   giflib-tools 						       gifhisto(1)