La Nature se dévoilant devant la Science

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72 The full color locus is very similar to the non-planar hexagon formed by the YRGCBMR edge progression about the RGB color cube
these full colors are the “best (object) colors” for daylight these “ultimate” colors are “best colors” for some weird illuminants (mixtures of two complementary monochromatic beams). For typical illuminants (like daylight) they are blacks. The Ostwald full color locus (for the daylight spectrum) in a chromaticity diagram. 73
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La Nature se dévoilant devant la S
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1 Color Space Jan Koenderink
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physics (optics) psychology of perc
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When a beam of radiation enters the
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Consider the space S of incoherent
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The whole procedure turns out to be
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Colorimetry is based upon an equiva
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In summary: Methodologically/concep
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From Newton derives the myth that o
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In a linear space infinitely many b
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700nm 530nm } equal mixture 578nm A
Page 23 and 24: The object colors
Page 25 and 26: All spectral reflectances fill an
Page 27 and 28: In classical colorimetry one has no
Page 29 and 30: Aside: I’m skipping numerous tech
Page 31 and 32: The “optimal colors” are the br
Page 33 and 34: Goethe against Newton In the “Pol
Page 35 and 36: Goethe’s “edge colors” are se
Page 37 and 38: spectrum & inverted spectrum 35 “
Page 39 and 40: Like the optimal colors, exactly on
Page 41 and 42: All of Newton’s experiments (also
Page 43 and 44: “Bad” spectral resolution can b
Page 45 and 46: Aside: “Color is seeing by wavele
Page 47 and 48: The Goethe “edge colors” are an
Page 49 and 50: “warm” edge color series “coo
Page 51 and 52: cool loop warm loop The edge color
Page 53 and 54: The edge color loci appear as you p
Page 55 and 56: Arthur Schopenhauer Arthur Schopenh
Page 57 and 58: “Best” colors occur when the cu
Page 59 and 60: The spectral region left over betwe
Page 61 and 62: 59 For the maximum volume RGB crate
Page 63 and 64: 1 0.75 0.5 0.25 0 1 0.75 0.5 0.25 0
Page 65 and 66: 63 The RGB crate mapped on a unit c
Page 67 and 68: Ostwald’s semichromes
Page 69 and 70: Ostwald asked a physicist: “What
Page 71 and 72: k c w complementaries In Ostwald’
Page 73: The “full colors” have maximum
Page 77 and 78: W K W K The envelope of all color W
Page 79 and 80: “ultimate color” optimal colors
Page 81 and 82: U x K W U c Any color can be writte
Page 83 and 84: 100 75 50 25 0 G Y R M B C The full
Page 85 and 86: Eisblau Ublau-Eisblau Ublau-Veil Se
Page 87 and 88: Ostwald’s color atlas has nothing
Page 89 and 90: Ostwald’s “Principle of Interna
Page 91: it can be shown that an “honest p
Page 94 and 95: The “Principle of Internal Symmet
Page 96 and 97: The “ Wyszecki Hypothesis” and
Page 98 and 99: There are two ways to force “Wysz
Page 100 and 101: An obvious (though apparently unrec
Page 102 and 103: 1.0 0.8 0.6 0.4 0.2 0.0 1.0 0.8 0.6
Page 104 and 105: A few remarks on “perceived color
Page 106 and 107: The squares need not be adjacent fo
Page 108: thank you for your attention j.j.ko
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