2005.10.18 17:06 "[Tiff] Change existingTiffTag", by Tobias Gurski

2005.10.18 17:45 "Re: [Tiff] Change existingTiffTag", by Frank Warmerdam

On 10/18/05, Tobias Gurski <tg@cromabase.de> wrote:

I try to change a tiff Tag in a existing tiff file. But I can't find a way to do this with the libtiff. Is there any way or not! I tried tiffsetField but it doesn't work. I searched 2 days without any result! Please help. Thanks


You might want to look at the tiffset program in libtiff/tools. It just opens the file in "r+" mode, and uses TIFFSetField() to set/reset selected fields. The thing to be aware of about this approach is that a new directory with the updated values gets written at the end of the file, orphaning the disk space used for the previous incarnation of the directory.

But if that isn't a problem for you, it should be practical.

Best regards,

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