For maximal color fidelity, bitmaps are produced in 24-bit color mode, with 16,777,216 possible colors.
For each file given on the command line, an output file is written with the same basename as the input file, but with extension jpeg, or the name specified by the -extension option.
With the -icon option, small companion files with the same name are also written in a subdirectory icons, which is created if necessary.
If no files are given on the command line, then stdin is read, and stdout is written, and no icon file can be produced.
pstojpeg is a convenient interface to cjpeg(1), gs(1), pnmcrop(1), pnmmargin(1), and pngtopnm(1), which do the real work.
To avoid confusion with options, if a filename begins with a hyphen, it must be disguised by a leading absolute or relative directory path, e.g. /tmp/-foo.eps or ./-foo.eps.
Options may begin with either UNIX-style single hyphens, or GNU/POSIX-style double hyphens, and may be abbreviated to any unique prefix.
In filter mode (no files on the command line), this option is ignored.
Use this option to trap the complex command pipelines for further private customization.
Unlike the lossless PNG and TIFF bitmap formats, the JPEG format is lossy, sacrificing quality to reduce data size. A quality value of 100 avoids quality loss, and smaller values produce smaller files of lower quality.
Warning: The JPEG format is suitable for continuous tone images, such as digital photographs, but introduces ghost artifacts in regions of a single color, such as a solid background in a line drawing. The artifacts are most evident at small quality values, and disappear as the quality value is increased to 100.
[Default: 100 dpi, suitable only for screen resolution].
This option, a POSIX convention, provides a general way for a user to pass options to programs invoked by another program. The value option is passed after any generated in response to options supplied to pstojpeg. For example, -Wpnmmargin,-black would cause any added margin to be colored black.
Nelson H. F. Beebe, Ph.D. Center for Scientific Computing University of Utah Department of Mathematics, 322 INSCC 155 S 1400 E RM 233 Salt Lake City, UT 84112-0090 Tel: +1 801 581 5254 FAX: +1 801 585 1640, +1 801 581 4148 Email: email@example.com, firstname.lastname@example.org, email@example.com, firstname.lastname@example.org WWW URL: http://www.math.utah.edu/~beebe