  High dynamic range (HDR) imaging has been attracting much attention as a
technology that can provide immersive experience. Its ultimate goal is to
provide better quality of experience (QoE) via enhanced contrast. In this
paper, we analyze perceptual experience of tone-mapped HDR videos both
explicitly by conducting a subjective questionnaire assessment and implicitly
by using EEG and peripheral physiological signals. From the results of the
subjective assessment, it is revealed that tone-mapped HDR videos are more
interesting and more natural, and give better quality than low dynamic range
(LDR) videos. Physiological signals were recorded during watching tone-mapped
HDR and LDR videos, and classification systems are constructed to explore
perceptual difference captured by the physiological signals. Significant
difference in the physiological signals is observed between tone-mapped HDR and
LDR videos in the classification under both a subject-dependent and a
subject-independent scenarios. Also, significant difference in the signals
between high versus low perceived contrast and overall quality is detected via
classification under the subject-dependent scenario. Moreover, it is shown that
features extracted from the gamma frequency band are effective for
classification.
