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T O P I C R E V I E W
swestner	Posted - Nov 07 2012 : 08:31:32 Hello, I have a tiff-file with multiple frames. I extract each frame with ExtractTiffImageFile . After extraction I combine the single frames again to one tiff file with InsertTiffImageFile . I change nothing in the tiff-files. I expect that the recombined file would be exact identical to the one I split but it isn't (I build a hash about both to verify it). If I do a picture-comparison it shows me that the image is the same but the difference lies somewhere in the header / metadata. Why? Greetings Stefan
3 L A T E S T R E P L I E S (Newest First)
fab	Posted - Nov 08 2012 : 01:29:13 quote: I expect that the recombined file would be exact identical to the one I split but it isn't (I build a hash about both to verify it). There is no guarantee that the headers will be identical. For example order of TIFF tags, byte alignments and other stuff may change.
swestner	Posted - Nov 08 2012 : 01:18:41 The picture contains no EXIF data. Optically the both TIFs are the same but binary they are not. Something changed when using ExtractTIFF and InsertTiff. Fabrizio: could you look at this? Thanks Stefan
xequte	Posted - Nov 07 2012 : 17:56:07 Hi Stefan Have you compared the header data using the EXIF demo at: http://www.imageen.com/demos/ Nigel Xequte Software www.xequte.com nigel@xequte.com