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MERGECHAN(1)							  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  indepen‐
       dently.

       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 proba‐
       bly be removed.

4th Berkeley Distribution	  Nov 8, 1987			  MERGECHAN(1)

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