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)