Gast
#829963
Hallo zusammen, ich bin auf der Suche nach einer FAX4 Implementierung. Diese ist auch als CCIT T.6 oder CCITT Group 4 2D oder TIFF G4 oder IBM MMR bekannt. Hat jemand vielleicht den Code dafür oder weiss woher man den bekommt (muss nicht unbedingt kostenfrei sein) Gruss Beschreibung FAX4 FAX4 is the interMedia designation for CCITT Group 4 2D compression, which was developed by the CCITT (International Telegraph and Telephone Consultative Committee) as a protocol for transmitting monochrome images over telephone lines by facsimile and similar machines. The more official designation for this compression scheme is CCITT T.6. Because this compression format supports only monochrome data, it cannot be used for color or grayscale images. This compression scheme uses a fixed dictionary that was developed using handwritten and typewritten documents and simple line graphics that were meant to be representative of documents being transmitted by facsimile. For this reason, although the compression can be used on images that have been dithered to monochrome, it may not produce as high a compression ratio as more adaptive schemes such as LZW or DEFLATE in those cases. FAX4 is most appropriate for scanned documents.