AWARE SYSTEMS
TIFF and LibTiff Mail List Archive

Thread

2005.02.22 03:08 "[Tiff] "half" samples in TIFF?", by Bob Friesenhahn
2005.02.22 04:22 "Re: [Tiff] "half" samples in TIFF?", by Chris Cox
2005.02.28 23:49 "RE: [Tiff] tiff 3.7.1 does not compile on AIX", by Bennett, Tony - CNF
2005.03.03 16:13 "Re: [Tiff] Tiff G4", by Beppe Costagliola
[...]

2005.02.22 03:08 "[Tiff] "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/