14 February 2008 Effect of blackness level on visual impression of color images
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Abstract
In this study, two experiments were conducted to clarify the relation between RGB values and perceived blackness. In the first experiment, the average RGB values of black surface areas in the test stimuli where observers begin to perceive the areas 'black', and further another average RGB values where observers perceive the areas 'really black' were determined. Results indicate that to realize a 'really black' surface, RGB values should be lower than those of the original image in some pictures. In the second experiment, how and to what degree the RGB values of black area affect the visual impression of artistic picture was investigated. Three dimensions, "high-quality axis", "mysterious axis", and "feeling of material axis", were extracted by factor analysis. Results indicate that the Art students seem to be more sensitive in the evaluations along the "high-quality axis" and "mysterious axis" than the Engineering students, while the opposite tendency is shown in the evaluation along the "feeling of material axis".
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Tetsuya Eda, Yoshiki Koike, Sakurako Matsushima, Miyoshi Ayama, "Effect of blackness level on visual impression of color images", Proc. SPIE 6806, Human Vision and Electronic Imaging XIII, 68061B (14 February 2008); doi: 10.1117/12.765873; https://doi.org/10.1117/12.765873
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