LJPGTOPNM
Section: User Commands (1)
Updated: 14 June 1994
Index
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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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