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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
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.
- Quiet mode. Default off on MSDOS, on under UNIX. Controls printout
of running scan lines. Use -q- to invert.
- 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
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.
- 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
- Print one line of command line help, similar to Usage above.
Eric S. Raymond <firstname.lastname@example.org>