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W. Thornton (1973)
A System of Photometry and Colorimetry Based Directly on Visual ResponseJournal of The Illuminating Engineering Society, 3
Y. Nayatani, T. Tanaka, H. Sobagaki, Kotaro Takahama, Kenjiro Hashimoto (1991)
Field trials for assessing the method of observer metamerism adopted by CIEColor Research and Application, 16
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INTRODUCTION could apply âAn X is an X is an Xâ to this problem, the problem would be resolved. As a graduate student in 1972, I wondered how the physiology of the different kinds of cones differ within our visual system. Not being bashful, I telephoned Israel Abramov, who even then was a noted neurophysiologist concerned with color. When I asked him my question, he paraphrased Gertrude Stein by saying, âA cone is a cone is a cone.â By this, he meant that cones in the visual system are distinguished only by their photopigments; the electrical signal a cone generates from its bleached photopigment does not depend on whether the photopigment preferentially absorbs long-, medium-, or short-wavelength light. Recently, I have found echoes of Gertrude Stein again, in the quantiï¬cation of observer metamerism (i.e., observer dependence of color matches). Here, the paraphrase would be âan X is an X is an X (and similarly for Y and Z).â In all indices of observer metamerism, including the one adopted by the CIE,1â 4 it is assumed that color differences are computed the same by any observer, given inputs X, Y, Z from the particular observer. These inputs X, Y,
Color Research & Application – Wiley
Published: Apr 1, 2000
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