jpeg2ps -- A utility for converting JPEG images to PostScript
http://www.pdflib.com/products/more/jpeg2ps.html
jpeg2ps is a utility for converting JPEG images to compressed PostScript
Level 2 or 3 files (without uncompressing the images). The JPEG data is
simply "wrapped" with PostScript which yields considerably smaller PS
files. jpeg2ps is a simple command line utility and can be used on DOS,
Windows and Unix machines.