BasicToneMapCalFormat - aleslab/Psychtoolbox-3-aleslab-fork GitHub Wiki
outputXYZCalFormat = BasicToneMapCalFormat(inputXYZCalFormat, maxLum)
Simple tone mapping.  Leaves any pixel with luminance below maxLum alone.
For pixels whose luminance exceeds maxLum, scale XYZ down multiplicatively so
that luminance is maxLum.
10/1/09 bjh, dhb     Created it.
10/4/09 dhb          Debug and make it work right.
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Psychtoolbox/PsychCal/BasicToneMapCalFormat.m