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2006.03.13 16:19 "Re: CCITT Group 4 images", by Joris Van Damme
Philip, Philip Watkinson wrote: > I have CCITT Group 4 compressed images that are not contained > within TIFF files. Can I use Libtiff to decompress the images? It is possible, but it is not easy. You can redefine the LibTiff IO routines. Thus, you can make 'm such that they 'read' a fake valid TIFF file header, a fake valid TIFF IFD, and your real CCITT group 4 data, all combined into a valid TIFF. LibTiff's output then is the decompressed data. Similar techniques are used in the tiff2pdf contribution. Joris Van Damme info@awaresystems.be http://www.awaresystems.be/ Download your free TIFF tag viewer for windows here: http://www.awaresystems.be/imaging/tiff/astifftagviewer.html