PGMTORLE(1) 1 (July 20, 1990) PGMTORLE(1)
NAME
pgmtorle - convert a pbmplus/pgm image file into an RLE
image file.
SYNOPSIS
pgmtorle [ -h ] [ -v ] [ -a ] [ -o outfile ] [ filename ]
DESCRIPTION
This program converts PBMPLUS grayscale (pgm) image files
into Utah RLE(5) image files. PBMPLUS/pgm image files
contain the image dimensions and 8-bit pixels with no matte
or alpha data. When converting to an RLE file, the alpha
channel may optionally be computed. The RLE file will
contain a "grayscale" image (8 bits) with no colormap. The
origins of PBMPLUS and Utah RLE files are in the upper left
and lower left corners respectively, so this program
automatically "flips" the image. These RLE files may then
be viewed using any RLE image viewer.
OPTIONS
-v This option will cause pgmtorle to operate in verbose
mode. The header information is written to "stderr".
Actually, there is not much header information stored
in a PBMPLUS file so this information is minimal.
-h This option allows the header of the PBMPLUS image to
be dumped to "stderr" without converting the file. It
is equivalent to using the -v option except that no
file conversion takes place.
-a This option will cause pgmtorle to use the grayscale
data to compute an alpha channel in the resulting RLE
file. For any non-zero grayscale data, the alpha
channel will contain a value of 255. The resulting RLE
image file will contain one color channel and one alpha
channel.
-o outfile
If specified, the output will be written to this file.
If outfile is "-", or if it is not specified, the
output will be written to the standard output stream.
infile.pgm
The name of the PBMPLUS image data file to be
converted. This file must end in ".pgm". However, it
is not necessary to supply the ".pgm" extension as it
will be added to the supplied name if not already
there.
EXAMPLES
pgmtorle-v test.pgm -o test.rle
While running in verbose mode, convert test.pgm to RLE
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PGMTORLE(1) 1 (July 20, 1990) PGMTORLE(1)
format and store resulting data in test.rle.
pgmtorle-h test
Dump the header information of the PBMPLUS file called
test.pgm.
SEE ALSO
ppmtorle(1), rletoppm(1), urt(1), RLE(5).
AUTHOR
Wesley C. Barris
Army High Performance Computing Research Center (AHPCRC)
Minnesota Supercomputer Center, Inc.
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