phpman > man > rletopnm(1)

Che Dong

Convert a Utah Raster Tools RLE image file to a PNM file.

Convert an RLE image to a PNM file
rletopnm {{path/to/input.rle}} > {{path/to/output.pnm}}
Create a PGM image containing the RLE file's alpha channel
rletopnm {{--a|--alphaout}} {{path/to/alpha_file.pgm}} {{path/to/input.rle}} > {{path/to/output.pnm}}
Operate in verbose mode and print the contents of the RLE header to `stdout`
rletopnm {{--verb|--verbose}} {{path/to/input.rle}} > {{path/to/output.pnm}}

RLETOPNM(1)                            General Commands Manual                           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-file‐
              name  file  contains  all zero (transparent) alpha values.  If you don't specify --al‐‐
              phaout, 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 differ‐
              ence.


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.



1                                           13 April 2000                                RLETOPNM(1)

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phpMan > man > rletopnm(1)