LJPGTOPNM

Section: User Commands (1)
Updated: 14 June 1994
Index Return to Main Contents
 

NAME

ljpgtopnm - decode a lossless JPEG file to a Portable Pixmap or Portable Graymap image file  

SYNOPSIS

ljpgtopnm [ -v ] [ filename ... ]

 

DESCRIPTION

ljpgtopnm decode a lossless JPEG file to a PPM (Portable Pixmap) or PGM (Portable Graymap) image file. If no files are specified, the standard input is decoded to the standard output.  

OPTIONS

-v verbose
Display data about image format, image size and sample precision.
 

EXAMPLES

This example decodes a ljpg file foo.ljpg and outputs to foo.ppm.

ljpgtopnm foo.ljpg foo.ppm

Next example decodes the foo.ljpg with verbose option. The output is saved as foo.ppm.

ljpgtopnm -v < foo.ljpg > foo.ppm
 

SEE ALSO

pnmtoljpg(1), ppm(5), pgm(5)
Wallace, Gregory K. "The JPEG Still Picture Compression Standard", Communications of the ACM, April 1991 (vol. 34, no. 4), pp. 30-44.  

AUTHOR

Kongji Huang and Brian Smith  

BUGS

Arithmetic coding and multiple scans are not supported.


 

Index

NAME
SYNOPSIS
DESCRIPTION
OPTIONS
EXAMPLES
SEE ALSO
AUTHOR
BUGS

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