sgitopnm(1) General Commands Manual sgitopnm(1)NAME
sgitopnm - convert a SGI image file to a portable anymap
SYNOPSIS
sgitopnm [-verbose] [-channel c] [SGIfile]
DESCRIPTION
Reads an SGI image file as input. Produces a PGM image for a 2-dimensional (1 channel) input file, and a PPM image for a 3-dimensional (3
or more channels) input file.
Alternatively, produces a PGM image of any one of the channels in the input file.
OPTIONS -verbose
Give some information about the SGI image file.
-channel c
Extract channel c of the image as a PGM image. Without this option, sgitopnm extracts the first 3 channels as a PPM image or, if
the input has only 1 channel, extracts that as a PGM image, and if the input has 2 channels, fails.
REFERENCES
SGI Image File Format documentation (draft v0.95) by Paul Haeberli (paul@sgi.com). Available via ftp at sgi.com:graphics/SGIIMAGESPEC.
SEE ALSO pnm(5), pnmtosgi(1)AUTHOR
Copyright (C) 1994 by Ingo Wilken (Ingo.Wilken@informatik.uni-oldenburg.de)
29 Jul 2000 sgitopnm(1)
Check Out this Related Man Page
ximtoppm(1) General Commands Manual ximtoppm(1)NAME
ximtoppm - convert an Xim file into a portable pixmap
SYNOPSIS
ximtoppm [--alphaout={alpha-filename,-}] [ximfile]
DESCRIPTION
Reads an Xim file as input. Produces a portable pixmap as output. The Xim toolkit is included in the contrib tree of the X.V11R4 release.
OPTIONS --alphaout=alpha-filename
ximtoppm 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,
ximtoppm does not generate an alpha file, and if the input image has an alpha channel, ximtoppm simply discards it.
If you specify - as the filename, ximtoppm writes the alpha output to Standard Output and discards the image.
Actually, an Xim image can contain an arbitrary fourth channel -- it need not be an Alpha channel. ximtoppm extracts any fourth
channel it finds as described above; it doesn't matter if it is an alpha channel or not.
See pnmcomp(1) for one way to use the alpha output file.
All options can be abbreviated to their shortest unique prefix.
SEE ALSO pnmcomp(1), ppm(5)AUTHOR
Copyright (C) 1991 by Jef Poskanzer.
April 2, 2000 ximtoppm(1)
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