Ghostscript is a processor for PostScript and PDF files. It can rasterize these files to a wide variety of printers, devices for screen preview, and image file formats. Since applications tend to prepare pages for printing in a high-level format such as PostScript, most Unix users with low-level bitmap printers, such as inkjets, use GhostScript as part of the printing process. In addition, Ghostscript is capable of converting PostScript files, functionality comparable to Adobe Acrobat Distiller, but on the command line. In addition, Ghostscript is used for file import and viewing by a great many other applications, including xv, ImageMagick, gimp, and xdvi. Several GUI wrappers for viewing PostScript and PDF files exist, including GSview, ghostview, gv, ggv, and kghostview. This is far from a comprehensive list.
TAMOGEN is designed either to create a mosaic of one image out of another or to create a mosaic of one image out of itself. Instead of selecting images from a pool on a best-fit basis, the generator utilizes one user-identified image to create a mosaic of another user-identified image by altering the tone of the component image. TAMOGEN will create color or black-and-white mosaics of arbitrary size.