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TIFF and LibTiff Mail List Archive

Thread

2000.10.03 20:44 "Varying BitsPerSample", by Rick LaMont
2000.10.05 04:37 "Re: Varying BitsPerSample", by Frank Warmerdam
2000.10.05 03:58 "Re: Varying BitsPerSample", by Sam Leffler
2000.10.05 04:26 "Re: Varying BitsPerSample", by Sam Leffler

2000.10.03 20:44 "Varying BitsPerSample", by Rick LaMont

There was a discussion on a newsgroup recently about having TIFF files with different data formats per channel. For example, 8-bit RGB with a 32-bit Z channel. Some thought that the TIFF format does not allow this but then Derek Kusiak wrote:

> Unless I'm misunderstanding what the TIFF 6.0 spec says, that's not > true:

>

> "Note that this field [BitsPerSample] allows a different number of bits > per component for each component corresponding to a pixel. For example,

> RGB color data could use a different number of bits per component for > each of the three color planes." (p.29)

Is there a limitation in libtiff that prevents exploitation of this section of the spec?

I'm interested in interpretations of the spec, pros/cons of this feature, limitations and workarounds.

Thanks,

Rick LaMont
Dot C Software, Inc.