In this study, we focus on glossiness that changes when reproducing colorimetric images of real objects. We experimentally explore image reproduction that is perceptually equivalent to the real object in terms of glossiness, which is necessary to retain the glossiness that can change. In addition to direct comparison of perceptual glossiness of real objects and colorimetrically reproduced images, psychophysical experiments were conducted to directly compare edited images and real objects to reproduce perceptual glossiness. Because direct comparisons of real objects and colorimetric reproduction images showed that the perceptual gloss decreased due to imaging for most stimuli, psychophysical experiment was conducted using processed image to reproduce the perceptual glossiness. The results of both experiments were analyzed using GLCM features, a type of texture analysis, suggesting that contrast, dissimilarity, and entropy are more reproducible than colorimetric reproduced images, whereas homogeneity is less reproducible than colorimetric reproduced images. When homogeneity and ASM are smaller than the colorimetric reproduced image, the image tends to be reproduced with a glossy appearance more similar to the original image.

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Investigation of Image Features for Perceptually Equivalent Gloss Reproduction Through Comparison of Real Objects and Images

  • Midori Tanaka,
  • Hideyuki Ajiki,
  • Takahiko Horiuchi

摘要

In this study, we focus on glossiness that changes when reproducing colorimetric images of real objects. We experimentally explore image reproduction that is perceptually equivalent to the real object in terms of glossiness, which is necessary to retain the glossiness that can change. In addition to direct comparison of perceptual glossiness of real objects and colorimetrically reproduced images, psychophysical experiments were conducted to directly compare edited images and real objects to reproduce perceptual glossiness. Because direct comparisons of real objects and colorimetric reproduction images showed that the perceptual gloss decreased due to imaging for most stimuli, psychophysical experiment was conducted using processed image to reproduce the perceptual glossiness. The results of both experiments were analyzed using GLCM features, a type of texture analysis, suggesting that contrast, dissimilarity, and entropy are more reproducible than colorimetric reproduced images, whereas homogeneity is less reproducible than colorimetric reproduced images. When homogeneity and ASM are smaller than the colorimetric reproduced image, the image tends to be reproduced with a glossy appearance more similar to the original image.