ppmchange

ppmchange - change all pixels of one color to another in a portable pixmap

ppmchange oldcolor newcolor [...] [ppmfile]

Reads a portable pixmap as input. Changes all pixels of oldcolor to newcolor, leaving all others unchanged. Up to 256 colors may be replaced by specifying couples of colors on the command line.

The colors can be specified in five ways:

o

A name, assuming that a pointer to an X11-style color names file was compiled in.

o

An X11-style hexadecimal specifier: rgb:r/g/b, where r g and b are each 1- to 4-digit hexadecimal numbers.

o

An X11-style decimal specifier: rgbi:r/g/b, where r g and b are floating point numbers between 0 and 1.

o

For backwards compatibility, an old-X11-style hexadecimal number: #rgb, #rrggbb, #rrrgggbbb, or #rrrrggggbbbb.

o

For backwards compatibility, a triplet of numbers separated by commas: r,g,b, where r g and b are floating point numbers between 0 and 1. (This style was added before MIT came up with the similar rgbi style.)

pgmtoppm(1), ppm(5)

Wilson H. Bent. Jr. (whb@usc.edu) with modifications by Alberto Accomazzi (alberto@cfa.harvard.edu)