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SGI Developer Toolbox 6.1
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SGI Developer Toolbox 6.1 - Disc 4.iso
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jpeg
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README.sgi
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README for jpeg
software to implement JPEG image compression and decompression
This directory contains an sgi inst-able image for jpeg version 4,
and includes the complete source for jpeg, preconfigured to compile
under 5.1 Irix, as well as pre-built 5.1 binaries and man page.
Along with all the files included in the inst image (see README.inst)
the following files also exist in this directory:
README.jpeg : intro, general usage, details, hints
README.jpegv4src: release 4 jpeg src README
README.inst : giving the low-down on the sgi inst-able image
README.sgi : this file
jpeg.manPage: ascii version of the man page, all 55 pages of it.
The inclusion of this inst-able image of jpeg would not have been
possible without the generous help of Robert Keller.
follows are the beginnings of cjpeg and djpeg man pages:
_____________________________________________________________________________
CJPEG(1) UNIX System V (4 November 1992) CJPEG(1)
NAME
cjpeg - compress an image file to a JPEG file
SYNOPSIS
cjpeg [ -quality N ] [ -grayscale ] [ -optimize ] [ -targa ]
[ -maxmemory N ] [ -restart N ] [ -smooth N ] [ -verbose ] [
-debug ] [ -arithmetic ] [ -nointerleave ] [ -qtables file ]
[ -sample HxV[,...] ] [ filename ]
DESCRIPTION
cjpeg compresses the named image file, or the standard input
if no file is named, and produces a JPEG/JFIF file on the
standard output. The currently supported input file formats
are: PPM (PBMPLUS color format), PGM (PBMPLUS gray-scale
format), GIF, Targa, and RLE (Utah Raster Toolkit format).
(RLE is supported only if the URT library is available.)
_____________________________________________
DJPEG(1) UNIX System V (2 August 1992) DJPEG(1)
NAME
djpeg - decompress a JPEG file to an image file
SYNOPSIS
djpeg [ -colors N ] [ -gif ] [ -pnm ] [ -rle ] [ -targa ] [
-blocksmooth ] [ -grayscale ] [ -maxmemory N ] [ -nodither ]
[ -onepass ] [ -verbose ] [ -debug ] [ filename ]
DESCRIPTION
djpeg decompresses the named JPEG file, or the standard
input if no file is named, and produces an image file on the
standard output. PBMPLUS (PPM/PGM), GIF, Targa, or RLE
(Utah Raster Toolkit) output format can be selected. (RLE
is supported only if the URT library is available.)