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04c visual signal processing color vision
 

04c visual signal processing color vision

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    04c visual signal processing color vision 04c visual signal processing color vision Presentation Transcript

    • Visual Information Processing
    • Polarized Light
    • Natural Polarization
    • Why is Sky Blue?
    • Polarization Filter
    • Polarization by Reflection
    • Polaroid filter
    • Polarized Sun Glasses
    • 3D Movie
    • Compound eye of Insect
    • Polarization of Vision of Insect
    • Honey Bee Dance
    • Polarization by Refraction
    • Rainbow is highly Polarized
    • Leon Battista Alberti 1435-36 Craftsman’s Handbook Cennino Cennini 1390
    • Newton's theory of Color 1672
    • Color Confusion Subtractive Color Additive Color
    • Young Helmhoz Color theory of Trichromatic Color vision 1802
    • Goethe’s Color theory 1810 “That I am the only person in this century who has the right insight into the difficult science of colors, that is what I am rather proud of, and that is what gives me the feeling that I have outstripped many.” Goethe studies after-images, colored shadows and Zür Farbenlehre (Theory of Colors) complementary colors
    • Ewald Hering’s Opponent Color Theory (1834-1918)
    • Color Vision
    • Reflectance of Light
    • Reflectance of natural pigment
    • Surface reflectance
    • Surface reflected from blue vase in sunlight and skylight
    • Opponent Color Theory
    • The reflectance function of a natural surface
    • L+M L-M L+M-S
    • Cones
    • Anatomical Distribution of Rods and Cones
    • Three types of Cones
    • First evidence of Opponent theory Horizontal cells of Teleost fish recording by Gunnar Svactichin and Edward MacNichol 1956
    • Geniculate Ganglion Color Channel Russell De Valois 1958
    • Hering’s Red Green Channel
    • Hering’s Red Green Channel
    • Hering’s Blue Yellow Channel
    • Horizontal Cells
    • Amicrine Cells
    • Receptive field of Ganglion Cells
    • Receptive field of Primate Ganglion Cells for Color
    • The Lateral Geniculate Nucleus
    • Color Vision in Visual Cortex
    • Color Vision beyond Striate Cortex
    • AIT = anterior inferior temporal area; CIT = central inferior temporal area; LIP = lateral intraparietal area; Magno = magnocellular layers of the lateral geniculate nucleus; MST = medial superior temporal area; MT = middle temporal area; Parvo = parvocellular layers of the lateral geniculate nucleus; PIT = posterior inferior temporal area; VIP = ventral intraparietal area.) (Based on Merigan and Maunsell 1993.)
    • Color blindness Normal Protanope Deuteranope Tritanope
    • Ishihara Chart for Color blindness testing 21, 2