1999.09.24 12:24 "Tiff 12 bits/pixels!!!", by Mauricio Cunha
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1999.09.24 22:45 "Re: Tiff 12 bits/pixels!!!", by Niles Ritter
To implement this transformation (12-bit image into data matrix) I must know HOW Adobe software saves this TIFF format, I mean I need to know the structure used by Adobe on saving the TIFF format when using 12-bit grayscale images. For this reason, I?d like to ask you if you have this kind of information or where I can get it.
If you have the libtiff utilities (www.libtiff.org) you can run "tiffinfo" and/or "tiffdump" on the files to see how they are structured.
The TIFF spec usually recommends packing data into the next larger power-of-2, so I would be they are actually 16-bit data.
Count yourself lucky; I once had to deal with a totally goofy TIFF file (I think it was from a government agency) that was 11-bit TIFF, packed. Just imagine the fun bit-masking that stuff out....