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August 2005
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2005.08.17 14:37 "Re: TIFFWriteScanline and G4 compressed block concatenation", by Joris Van Damme
Philip Watkinson wrote: > You can extract a CCITT Group 4 image from a TIFF file with > TIFFReadRawStrip() and create a valid CCITT Group 4 image file > provided the image only uses one strip. Indeed. I hadn't noticed there was ever any doubt about that. > > 2.I want to extract a CCITT Group 4 image from a TIFF file. If I > > obtain the strip offsets using TIFFGetField(), can I concatenate the > > strips together to create a valid CCITT Group 4 image file? > > A good way to find out is to try. I'm not enterily sure and would have > to double-check, but I don't think you can do that. Two CCITT group 4 > compressed blocks, concatenated, is not one valid block I think.... Have you double-checked my suspicion? If so, it would be interesting to read your findings. 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