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 doesnt
contain an alpha channel, the alpha-filename file contains all
zero (transparent) alpha values. If you dont 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) for one way to use the alpha output file.
| |
--verbose | |
This option causes rletopnm to operate in verbose mode.
It prints messages about what its 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
o |
While running in verbose mode, convert lenna.rle to PPM format and
store the resulting image as lenna.ppm:
|
o |
Dump the header information of the RLE file called file.rle:
|
o |
Convert RLE file dart.rle to PPM format as dart.ppm. Store the
alpha channel of dart.rle as dartalpha.pgm (if dart.rle doesnt have
an alpha channel, store a fully transparent alpha mask as
dartalpha.pgm):
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SEE ALSO
pnmtorle(1) , pnmconvol(1) , pnm(5) , ppm(5) , pgm(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.