[VHFp2] Physiological and Psychophysical Factors

[VHFp2-1] The Subjective Evaluation Experiment for the Estimation of Helmholtz-Kohlrausch Effect under the Ambient Lighting Conditions

*Kota Nakagawa¹, Hisakazu Aoyanagi², Hiroaki Takamatsu², Yoshifumi Shimodaira¹, Gosuke Ohashi¹ (1. University of Shizuoka (Japan), 2. NEC Display Solutions,Ltd (Japan))

Keywords:Helmholtz-Kohlrausch effect, Natural Images, Perceived brightness, Ambient Light

The purpose of this study is to carry out the subjective evaluation experiment for natural images to measure the magnitude of Helmholtz-Kohlrausch effect under ambient lighting conditions. We found that the magnitude of the H-K effect and the saturation tends to decrease as the brigntness of the environment increases.