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2000.03.21 17:25 "TIFFTAG_IMAGEDEPTH", by Cris Luengo
2000.03.22 10:55 "Re: TIFFTAG_IMAGEDEPTH", by Thad Humphries
2000.03.22 10:58 "Re: TIFFTAG_IMAGEDEPTH", by Cris Luengo

2000.03.22 10:58 "Re: TIFFTAG_IMAGEDEPTH", by Cris Luengo

Depth is the color depth,the number of bits used to represent colors (e.g., 1 for binary/B&W, 8-bit color for 256 colors).

That should be BitsPerSample * SamplesPerPixel.

According to 'tiff.h', TIFFTAG_IMAGEDEPTH is a private tag registered to SGI, and defines the z depth of an image.