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November 2003

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2003.11.26 14:17 "Bug in LogLuv", by Antonio Scuri

2003.11.26 16:31 "Re: Bug in LogLuv", by Greg Ward

2003.11.26 17:41 "Re: Bug in LogLuv", by Antonio Scuri

2003.11.26 17:54 "Re: Bug in LogLuv", by Greg Ward

2003.11.27 15:10 "Re: Bug in LogLuv", by Andrey Kiselev

2003.11.27 15:23 "Re: Bug in LogLuv", by Kai-uwe Behrmann

2003.11.27 15:48 "Re: Bug in LogLuv", by Antonio Scuri

2003.11.27 16:01 "Re: Bug in LogLuv", by Kai-uwe Behrmann

2003.11.27 19:10 "Re: Bug in LogLuv", by Greg Ward

2003.11.27 19:10 "Re: Bug in LogLuv", by Greg Ward

> Is there an option in libtiff to convert Your format to 32-bit floats 
> or 16-bit ints other than the 8-bit output I optain currently with 
> libtiffs fallback functionality ?
> This would help me supporting this format in cinepaint.

To talk to the library in 32-bit floats (CIE XYZ components or Y for 
grayscale), you need to set the tag:

        TIFFSetField(tif, TIFFTAG_SGILOGDATAFMT, SGILOGDATAFMT_FLOAT);

This and other tips are available on my web pages at:

	http://www.anyhere.com/gward/pixformat/tiffluv.html

If you need to convert to and from an RGB representation, you can 
follow the recommendations in my JGT paper:

	http://www.anyhere.com/gward/papers/jgtpap1.pdf

-Greg