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TIFF and LibTiff Mail List Archive

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2008.02.07 15:27 "[Tiff] 32-bit floating point RGB images (and gamma)", by Edward Lam
2008.02.08 20:44 "Re: [Tiff] 32-bit floating point RGB images (and gamma)", by Chris Cox
2008.02.12 03:28 "Re: [Tiff] 32-bit floating point RGB images (and gamma)", by Edward Lam

2008.02.07 15:27 "[Tiff] 32-bit floating point RGB images (and gamma)", by Edward Lam

Hi Folks,

What's the best way to express a TIFF file that has 32-bit floating point, *linear* RGB data? If I do the dumb thing, then Photoshop CS3 Extended interprets the data with a 2.2 gamma. However, ImageMagick seems to display the image without the gamma correction.

Looking at the TIFF 6 spec, the default TransferFunction seems to be 2.2 gamma correction if unspecified for RGB PhotometricInterpretation? However, one can't easily provide a linear TransferFunction for 32 bits per sample data.

Thanks,

-Edward