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February 2005

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2005.02.22 03:08 ""half" samples in TIFF?", by Bob Friesenhahn

2005.02.22 04:22 "Re: "half" samples in TIFF?", by Chris Cox

2005.02.22 03:08 ""half" samples in TIFF?", by Bob Friesenhahn

Has anyone tried using TIFF files containing 16-bit floating point 
values in "half" format as used by OpenEXR (http://www.openexr.com/) 
and supported by the latest OpenGL and some Nvidia graphics adaptors? 
This is not supported by the TIFF specification, but it seems quite 
feasable to use anyway.

See 
http://oss.sgi.com/projects/ogl-sample/registry/ARB/half_float_pixel.txt
for a short description of "half".  Also see 
"http://www.openexr.com/details.html#halftype".

By transferring certain EXR parameters to TIFF tags, many of the EXR 
format benefits could be realized without needing an entirely new 
format and new library.

Bob
======================================
Bob Friesenhahn
bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/