[Openexr] Purpose of half floats

[Gernot Ziegler]

Hej !

To add to the "purpose of float" discussion:
You might want to take a look at
http://www.openexr.com/TechnicalIntroduction.pdf
it explains quite well in "What's in the numbers?" which tradeoffs there
are in using 16bit half floats .

Servus,
  Gernot

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