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[Openexr-devel] loosing massive amount of information using openexr
From: |
Morten Mikkelsen |
Subject: |
[Openexr-devel] loosing massive amount of information using openexr |
Date: |
Thu, 27 Dec 2012 12:55:37 -0800 |
I am trying to use open exr for export/import of height maps.
I am exporting maps which have hundreds of thousands of unique height values.
I have tried exporting to openexr in several different existing applications such as:
xnormal, photoshop, blender and using DevIl (image library).
In all cases I end up with no more than a small handful of unique height values. Roughly 8000.
If on the other hand I export to 16 bit png then I get roughly 65000.
If I export as .raw I of course get all my hundreds of thousands of values.
I have tried all the compression options for openexr. Lossy ones as well as non lossy ones.
None of them are giving me more than roughly 8k unique heights.
I don't know which version of openexr these tools would be using though it clearly wouldn't be the most recent version.
That being said the fact that all 4 are showing me same behavior is leading me to suspect it's a problem with openexr lib or perhaps a former versions of openexr.
Is this a known problem with openexr?
Thanks,
Morten.
- [Openexr-devel] loosing massive amount of information using openexr,
Morten Mikkelsen <=