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Rletopnm User Manual(0)                                Rletopnm User Manual(0)



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


SYNOPSIS
       rletopnm

       [--alphaout={alpha-filename,-}] [--headerdump|-h]

       [--verbose|-v]

       [rlefile|-]

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


DESCRIPTION
       This program is part of Netpbm(1).

       rletopnm converts Utah Raster Toolkit RLE image files to 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  (trans-
              parent) 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 pamcomp(1)foronewaytouse 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.




EXAMPLES
       ?      While  running  in  verbose  mode,  convert  lenna.rle  to  PPM  format and store the resulting image as
              lenna.ppm:


                  rletopnm --verbose lenna.rle >lenna.ppm


       ?      Dump the header information of the RLE file called file.rle:


                  rletopnm --headerdump file.rle


       ?      Convert RLE file dart.rle to PPM format as dart.ppm.  Store the alpha channel  of  dart.rle  as  dartal-
              pha.pgm  (if  dart.rle  doesn't  have  an alpha channel, store a fully transparent alpha mask as dartal-
              pha.pgm):


                  rletopnm --alphaout=dartalpha.pgm dart.rle >dart.ppm




SEE ALSO
       pnmtorle(1), pnmconvol(1), pnm(1), ppm(1), pgm(1),


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.



netpbm documentation             13 April 2000         Rletopnm User Manual(0)