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ppmcolormask

NAME

ppmcolormask - produce mask of areas of a certain color in a PPM file

SYNOPSIS

ppmcolormask

color

[ppmfile]

DESCRIPTION

This program is part of Netpbm(1).

ppmcolormask reads a PPM file as input and produces a PBM (bitmap) file as output. The output file is the same dimensions as the input file and is black in all places where the input file is the color color, and white everywhere else.

The output of ppmcolormask is useful as an alpha mask input to pamcomp. Note that you can generate such an alpha mask automatically as you convert to PNG format with pnmtopng(1).Useits-transparent option.

ppmfile is the input file. If you don't specify ppmfile, the input is from Standard Input.

The output goes to Standard Output.

Specify the color (color) as described for the argument of the ppm_parsecolor() library routine .

SEE ALSO

pgmtoppm(1), pamcomp(1), pbmmask(1), ppm(1)