2007.09.25 09:05 "[Tiff] TIFFClientOpen() fails for fiels with incorrect "ExtraSamples" field.", by Krishna Singh Karki

2007.09.26 01:52 "Re: [Tiff] TIFFClientOpen() fails for fiels with incorrect "ExtraSamples" field.", by Frank Warmerdam

On 9/25/07, Krishna Singh Karki <kskarki@hotmail.com> wrote:

I am using TIFF library version 3.8.2 and I am facing problem opening certain scanned tiff files.

I am using TIFFClientOpen() function to read tiff files. For a test tiff file, I get a warning message

incorrect count for field "ExtraSamples" (0, expecting 1); tag ignored. and then the above call to TIFFClientOpen() returns NULL.

I looked at tiff sources and the warning is thrown from CheckDirCount() function in tif_dirread.c() function. Since the above message indicates a warning on debugging I saw that it will always fail in above case.

Is this a known issue? Is it due to the file being corrupt value for tag?


It sounds like libtiff reacts unnecessarily harshly to what I presume is an incorrectly setup TIFF file. If you can file a bug report on this with a moderately sized example file I hope we could do something about this.

Best regards,


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