AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2006.08.24 07:29 "[Tiff] IPTC tag", by Joris
2006.08.24 21:34 "Re: [Tiff] IPTC tag", by Chris Cox
2006.08.25 11:15 "Re: [Tiff] IPTC tag", by Joris
2006.08.25 15:36 "Re: [Tiff] IPTC tag", by Bob Friesenhahn
2006.08.25 15:56 "Re: [Tiff] IPTC tag", by Joris
2006.08.25 18:50 "RE: [Tiff] IPTC tag", by Chris Cox
2006.08.29 15:47 "Re: [Tiff] IPTC tag", by Joris
2006.09.07 05:15 "Re: [Tiff] Some tags with count zero", by Anurag Singh
2006.09.06 06:31 "[Tiff] Some tags with count zero", by Anurag Singh
2006.09.06 13:09 "Re: [Tiff] Some tags with count zero", by Joris
2006.09.07 10:10 "Re: [Tiff] Some tags with count zero", by Joris

2006.09.07 10:10 "Re: [Tiff] Some tags with count zero", by Joris

Anurag,

Act i want to make exact copy of tags in output file, and i dont think that it would create any problem problem. Because existing tif image already have that tag with same count and value (or offset). Actually i my case count is 0, i am expecting that tiff image interpreted as dummy tag..

i want to know that if any tag have count zero then is there any use of this tag?

If the tag is unknown to us, then that means we don't know. Try searching for the tag numbers over at the tag directory http://www.awaresystems.be/imaging/tiff/tifftags.html (just type number in search page). If that doesn't help, Google on it. If that doesn't help, then only the tag owner knows what meaning any value or any lack of value may have. So count of 0 is no special case in that regard.

It's good to see you think you won't create a problem by making exact copy of tags. Have you considered that LONG values may be IFDs, and that an exact copy of those is nobody's intention and will next get readers that do know the tag into trouble?

Best regards,

Joris Van Damme

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