Processing behind makehdr and tone mapping algorithm?
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When using makehdr of jpeg colored images(5 no.s), we get an hdr image and after tone mapping we calculate the RGB values using impixel command. Luminance is calculated using equation L= K*(.2127*R)+0.7151*G+0.0722*B), where calibration factor K=1, reference. When comparing the luminance value given by photomatix software, the value given by matlab is about 2-3 times greater than the luminance given by photomatix. For example, at a point Lphotomatix is 67 and Lmatlab is 208. Why is this happening?
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