Relation between colorimetric colour-differences and perceived ones for saturated colour chips with constant value and chroma

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概要

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• Perceived colour-differences of colour chips are estimated subjectively by means of ratio estimation method under standard illuminant A and daylight D_<65>, and are compared with their colorimetric ones in the CIE 1976 L^*u^*v^*, the CIE 1976 L^*a^*b^*, a modified L^*u^*v^*, and a modified Cube-root colour spaces.The set of colour chips used in the experiment consists of one hundred and sixty hues with constant value and chroma of 6/8 in the Munsell renotation system. Colorimetric colour-differences of the pairs of colour chips are within the range of 0.89 to 17.56 under daylight illuminant D_<65> in the CIE 1976 L^*a^*b^* uniform colour space.Results obtained are summarized as follows : (1) Relative values of perceived colour-differences change little even when the illuminant changes from D_<65> to A, and the constancy of perceived colour-difference holds as well as in the case of colour chips of lower chroma.(2) Under the daylight D_<65>, the degrees of correlation between perceived colour-differences and colorimetric ones are little different among the colour spaces examined, but under the illuminant A the degree in the CIE L^*u^*v^* colour space is a little lower than the others.(3) The variation with hue angle of the ratio of colorimetric colour-differences under the illuminant A and those under the illuminant D_<65> in the CIE L^*u^*v^* colour space is the largest, and that in the Cube-root colour space is the smallest.(4) The correction to the chromatic adaptation in terms of colour-differences is well done in the Cube-root colour space, and it is scarcely done in the CIE L^*u^*v^* colour space.

• 社団法人照明学会の論文

著者

• IKEDA Koichi

  Faculty of Science and Engineering, Science University of Tokyo.

• OBARA Kiyoshige

  Faculty of Science and Engineering, Science University of Tokyo.

• Ikeda Kazuho

  Department Of Biological Sciences Graduate School Of Science University Of Tokyo

• Ikeda K

  Osaka City Univ. Osaka Jpn

• Ikeda Koichi

  Tokyo Rika Daigaku

• Ikeda K

  Tokyo Rika Daigaku Dept. Electri. Engng. Fac. Sci. Tech.

• NAKAYAMA Masaharu

  Faculty of Science and Technology, Tokyo Rika Daigaku

• Nakayama Masaharu

  Tokyo Rika Daigaku Dept. Electri. Engng. Fac. Sci. Tech.

• Obara K

  Faculty Of Science And Technology Tokyo Rika Daigaku

• Obara Kiyoshige

  Faculty Of Science And Engineering Science University Of Tokyo.

• Ikeda Koichi

  Tokyo Rika Daigaku Department Of Electrical Engineering Faculty Of Science And Technology

• Ikeda Koichi

  Faculty Of Science And Engineering Tokyo Rikadaigaku (science University Of Tokyo)

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