Abstract
The purpose of this study is to examine the difference in perceptual brightness enhancement per image category through perceptual brightness measurement. Perceptual brightness is measured via psychophysical experiment and brightness enhancement is performed by TMF (Tone Mapping Function). The classification process is comprised of two steps. It is possible to classify histograms into six groups. The three different TMFs for each category selected using the criteria and TMF application strengths. A psychophysical experiment to measure perceptual brightness enhancement was carried out. The experiment was to determine the equal perceptual brightness point between an original image and the corresponding set of TMF images. The results showed that the mean luminance for each category is significantly different. The results from brightness matching indicate that perceptual brightness enhancement is dependent on image category. We can propose that image category should be considered for advanced brightness enhancement methods.
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