Internal Program Version: jpeg2ps 1.9
jpeg2ps converts JPEG files to PostScript Level 2 or 3 EPS.
In fact, jpeg2ps is not really a converter but a "wrapper":
it reads the image parameters (width, height, number of color
components) in a JPEG file, writes the corresponding EPS header
and then copies the compressed JPEG data to the output file.
Decompression is done by the PostScript interpreter (only
PostScript Level 2 and 3 interpreters support JPEG compression
and decompression). If you have a slow communication channel
and a fast printer, sending compressed image data is a big win.
https://www.pdflib.com/download/free-software/jpeg2ps
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