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rletopnm(1)


NAME

   rletopnm  - convert a Utah Raster Tools RLE image file into a PNM image
   file.

SYNOPSIS

   rletopnm       [--alphaout={alpha-filename,-}]        [--headerdump|-h]
   [--verbose|-v] [--plain|-p] [rlefile|-]

   All options may be abbreviated to their minimum unique abbreviation and
   options and arguments may be in any order.

DESCRIPTION

   This program converts Utah Raster Toolkit  RLE  image  files  into  PNM
   image  files.   rletopnm  handles four types of RLE files: Grayscale (8
   bit data, no color map), Pseudocolor (8 bit data  with  a  color  map),
   Truecolor  (24  bit data with color map), and Directcolor (24 bit data,
   no color map).  rletopnm generates a  PPM  file  for  all  these  cases
   except for the Grayscale file, for which rletopnm generates a PGM file.

   rlefile  is  the RLE input file.  If it is absent or -, the input comes
   from Standard Input.

OPTIONS

   --alphaout=alpha-filename
          rletopnm creates a PGM (portable graymap)  file  containing  the
          alpha  channel  values  in  the input image.  If the input image
          doesn't  contain  an  alpha  channel,  the  alpha-filename  file
          contains  all  zero  (transparent)  alpha  values.  If you don't
          specify --alphaout, rletopnm does not generate  an  alpha  file,
          and  if  the  input  image has an alpha channel, rletopnm simply
          discards it.

          If you specify - as the  filename,  rletopnm  writes  the  alpha
          output to Standard Output and discards the image.

          See pnmcomp(1) for one way to use the alpha output file.

   --verbose
          This  option  causes  rletopnm  to  operate in verbose mode.  It
          prints messages about what it's doing, including the contents of
          the RLE image header, to Standard Error.

   --headerdump
          This  option causes rletopnm to operate in header dump mode.  It
          prints the contents of the RLE image header to  Standard  Error,
          but does not produce any other output.

   --plain
          This  option  causes  the  PNM  output file to be in the "plain"
          (text) format, instead of the  default  "raw"  (binary)  format.
          See ppm(5) and pgm(5) for details on the difference.

EXAMPLES

   rletopnm --verbose lenna.rle >lenna.ppm
          While  running  in verbose mode, convert lenna.rle to PPM format
          and store the resulting image as lenna.ppm.

   rletopnm --headerdump file.rle
          Dump the header information of the RLE file called file.rle.

   rletopnm --alphaout=dartalpha.pgm dart.rle >dart.ppm
          Convert RLE file dart.rle to PPM format as dart.ppm.  Store  the
          alpha  channel of dart.rle as dartalpha.pgm (if dart.rle doesn't
          have an alpha channel, store a fully transparent alpha  mask  as
          dartalpha.pgm).

SEE ALSO

   pnmtorle(1), pnmconvol(1), pnm(5), ppm(5), pgm(5), urt(1), RLE(5)

AUTHOR

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

   Modifications by Eric Haines to support raw and plain formats.

   Modifications by Bryan Henderson to create alpha files and use mnemonic
   options.



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