AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2013.02.13 22:03 "[Tiff] 32 bit to 16bit conversion", by james wells
2013.02.14 01:16 "Re: [Tiff] 32 bit to 16bit conversion", by Chris Cox
2013.02.14 14:02 "Re: [Tiff] 32 bit to 16bit conversion", by james wells
2013.02.14 15:08 "Re: [Tiff] 32 bit to 16bit conversion", by Bob Friesenhahn
2013.02.14 19:26 "[Tiff] TIFF support for 16 bit floats", by Richard Nolde
2013.02.15 14:09 "Re: [Tiff] TIFF support for 16 bit floats", by Charles Auer

2013.02.14 01:16 "Re: [Tiff] 32 bit to 16bit conversion", by Chris Cox

32 bit float or integer? And converting to 16 bit float or integer?

Those choices make a big difference in how you do the conversion.

integer -> integer is normally done with linear scaling.

float -> float is done with simple float mapping tools (like the half library from ILM).

integer -> float is straightforward

float -> integer usually requires HDR (High Dynamic Range) tone mapping algorithms

Chris

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From: tiff-bounces@lists.maptools.org [tiff-bounces@lists.maptools.org] On Behalf Of james wells [jwneuror@gmail.com]

I'm new to dealing with tiffs and images in general, but I need to do a bit depth change of an incoming tiff and am not too sure where to start.

The tif will always be a 32bit grayscale tif, and is in a controlled

I understand this is a little vague, and I hope not to offend with a obvious lack of knowledge on this.

I'd really appreciate any light you could shed on my problem, and If you could point me in the right direction I'd be very grateful.

Thanks for your time guys :)

Cheers,
Jw.