ps2tiffs extracts the sampled images from a PostScript document. It is not a PostScript renderer. ps2tiffs is a system where the grazer feeds on the output of a PostScript interpreter whose image operators have been replaced by special data-hijacking functions. This has the benefit of allowing the extraction of images regardless of how they have been encoded, formatted, scaled, or squished by the app which generated the PostScript document. It outputs greyscale, RGB, and CMYK TIFFs.
Image Alchemy has the ability to convert between over 90 different raster image formats (including all colorspace and compression variations of each format). Color management features include gamma correction, undercolour removal, seven high quality dithers, colorspace conversion, and palette manipulation. It also includes a Postscript interpreter.
fnumfilt helps you process sets of digital camera photos (filenames with numbers). You can select/deselect ranges of numbers and define the format of the output lines. The magic "-x" option executes the generated output lines as commands. An example of usage is to convert a range of digital camera images into another format.