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PNMTORLE(1)                 General Commands Manual                PNMTORLE(1)

       pnmtorle - convert a Netpbm image file into an RLE image file.

       pnmtorle [ -h ] [ -v ] [ -a ] [ -o outfile ] [ pnmfile ]

       This  program converts Netpbm image files into Utah RLE(5) image files.
       You can include an alpha mask.  If the input is a multiple image  file,
       the output consists of several concatenated RLE images.

       The  RLE file will contain either a three channel color image (24 bits)
       or a single channel grayscale image (8 bits)  depending  upon  the  pnm
       file  depth.   If a converted ppm is displayed on an 8 bit display, the
       image must be dithered.  In order to produce a better looking image (on
       8  bit  displays), it is recommended that the image be quantizing (to 8
       bit mapped color) prior to its display.  This may be done by piping the
       output  of this program into the Utah mcut(1) or rlequant(1) utilities.
       An example of this is shown later.

       -v     This option will cause pnmtorle to operate in verbose mode.  The
              header  information  is written to "stderr".  Actually, there is
              not much header information stored in a  Netpbm  file,  so  this
              information is minimal.

       -h     This  option  allows the header of the Netpbm 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  causes pnmtorle to include an alpha channel in the
              output image.  The alpha channel is based on the  image:   Wher-
              ever  a  pixel is black, the corresponding alpha value is trans-
              parent.  Everywhere else, the alpha value is fully opaque.

       -o outfile
              If specified, the output will be written to this file.  If  out-
              file is "-", or if it is not specified, the output will be writ-
              ten to the standard output stream.

              The name of the Netpbm image data file to be converted.  If  not
              specified, standard input is assumed.

       pnmtorle -v file.ppm -o file.rle
              While  running  in  verbose mode, convert file.ppm to RLE format
              and store resulting data in file.rle.

       pnmtorle -h file.pgm
              Dump the header information of the Netpbm file called file.pgm.

       rletopnm(1), urt(1), RLE(5).

       Wes Barris
       Army High Performance Computing Research Center (AHPCRC)
       Minnesota Supercomputer Center, Inc.

1                               March 31, 1994                     PNMTORLE(1)

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