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要旨:
A tone mapping algorithm for displaying high contrast scenes
was designed on the basis of the results of experimental
tests using human subjects.
Systematic
perceptual evaluation of several existing tone mapping
techniques revealed that the most ``natural'' appearance was
determined by the presence in the output image of detailed
scenery features often made visible by limiting contrast
and by properly reproducing brightness. Taking these results
into account, we developed a system to produce images close to
the ideal preference point for high dynamic range input image data.
Of the algorithms that we tested, only the Retinex algorithm was
capable of retrieving detailed scene features hidden in high luminance areas
while still preserving a good contrast level.
This paper presents changes made to Retinex algorithm for processing
high dynamic range images, and a further integration of the Retinex
with specialized tone mapping algorithms that enables the production
of images that appear as similar as possible to the viewer's
perception of actual scenes.
