BC : CS092 / PS392 / FA294 : Visual Perception in Art and Science, Fall 2008
Psychology of Color Vision
Stella X. Yu
Michael Mulhern
@ Computer Science
@ Fine Arts
Boston College
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Psychological Color Space
1. Each point in the space represents a color experience.
2. Similar colors are near each other.
3. Dissimilar colors are far from each other.
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Line Color Space
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Newton’s Color Circle
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3D Color Spindle
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Hue, Saturation, Value or Brightness
I
Hue = Basic Color: Direction from central axis
I
Saturation = Purity: Distance from central axis
I
Brightness = Intensity: Height along central axis
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Munsell Color Wheel
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Munsell Color Solid
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Pure Colors Are Not Equally Brilliant
0.98
0.90
0.87
0.60
0.54
0.30
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Value vs. Saturation
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CIE Color System
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Psychophysical Correspondence: Hue = Mean
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Correspondence: Saturation = Variance
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Correspondence: Brightness = Area
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Basic Phenomena
1. Color Mixture
2. Metamers
3. Unique Hues
4. Color Blindness
5. Color Aftereffects
6. Induced Color
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Light Mixture
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Light Primaries, Secondaries and Tertiaries
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Paint Mixture
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Additive vs. Subtractive (Multiplicative) Mixture
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Light, Paint and Printing
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Optical Color Fusion
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Computer Monitor
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Paint, Printing and Pointillism
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Chuck Close: Francesco, 1988
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Chuck Close: Francesco, 1988
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Steve Jobs Made out of Apple Products, 2008
http://www.flickr.com/photos/tsevis/
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Different Light Spectra but Same Color
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Monochromatic Lights Have No True Metamer
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Complementary Colors in Color Pie
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Complementary Colors in CIE Space
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Unique Hues
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Red, Green, Blue and Yellow
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Not So Pure Colors
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Color Blindness
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Color Blindness
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Trichromacy: Normal
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Dichromacy: Red-Green, Yellow-Blue Anopia
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Monochromacy: Colorless Anopia
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Color Weakness: Anomaly
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Cortical Color Blindness
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Genetic Inheritance: X-Linked Disorder
10% Male, 0.6% Female in US
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Ishihara Color Test
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Reverse Color Test
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Different for Color-Normal and Color-Blind
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Color Image
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Color After Effects at Distances
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Induced Color
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Neon Spreading: Color
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Neon Spreading: Value
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