ljpgtopnm.1

很好的JPEG图象解码器,基于VC环境开发。

.TH LJPGTOPNM 1 "14 June 1994"
.SH NAME
ljpgtopnm \- decode a lossless JPEG file to a Portable Pixmap or \
Portable Graymap image file
.SH SYNOPSIS
.B ljpgtopnm
[
.BI \-v
]
[
.I filename ...
]
.LP
.SH DESCRIPTION
.LP
.B 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.
.SH OPTIONS
.TP
.B \-v "verbose"
Display data about image format, image size and sample precision.
.SH EXAMPLES
.LP
This example decodes a ljpg file foo.ljpg and outputs to foo.ppm.
.IP
.B ljpgtopnm
.I foo.ljpg foo.ppm
.LP
Next example decodes the foo.ljpg with verbose option. 
The output is saved as foo.ppm.
.IP
.B ljpgtopnm
.I -v
.B <
.I foo.ljpg
.B >
.I foo.ppm
.SH SEE ALSO
.BR pnmtoljpg (1),
.BR ppm (5),
.BR pgm (5)
.br
Wallace, Gregory K.  "The JPEG Still Picture Compression Standard",
Communications of the ACM, April 1991 (vol. 34, no. 4), pp. 30-44.
.SH AUTHOR
Kongji Huang and Brian Smith
.SH BUGS
Arithmetic coding and multiple scans are not supported.