MERGECHAN(1)

NAME
mergechan - merge channels from several RLE files into a single output stream

SYNOPSIS
mergechan [ -a ] [ -o outfile ] infiles ...

DESCRIPTION
Mergechan takes input from several RLE files and combines them into a single output stream. Each channel in the output stream comes from the respective filename specified on the input (i.e., channel zero is taken from the first file, channel one from the next, etc). The same file can be specified more than once. If the -a flag is given, the channels are numbered from -1 (the alpha channel) instead of zero. All of the input channels must have exactly the same dimensions (use crop(1) to adjust files to fit each other). Mergechan is typically used to introduce an alpha mask from another source into an image, or combine color channels digitized independently. If -o is specified, the output will be written to outfile.

SEE ALSO
crop(1), rleswap(1), urt(1), RLE(5).

AUTHOR
John W. Peterson, University of Utah.

BUGS
Mergechan is totally ignorant of the color maps of the input files. The restriction that all input files must be the same size could probably be removed.