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>