Hello. I am trying to calculate luminance values from Radiance RGBE
values. Somehow, I am not getting good results.
For example, at a certain pixel, the RGBE values are:
R = 128; G = 137; B = 165; E = 129
which is (1.00 1.07 1.29) in RGB values.
The luminance value computation is given by the formula:
luminance = 179 * (0.265*R + 0.670*G + 0.065*B)
With the above RGB values, I calculate luminance as 190.77 (which is
too low) and luminance inquiry in ximage gives 3181 cd/m2 (which makes
lots of sense) for the same pixel. Obviously, I am missing something here.
I would appreciate any help in calculating luminance values from RGBE
data. Thank you.
Mehlika Inanici
University of Michigan o
Taubman College of Architecture + Urban Planning o
Office: 2224 B |\ o
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Ann Arbor, Michigan |\ / .\ o
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