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Color Vision

Color Vision. Topic 2: History of Color Vision. About the Author. Professor: Cambridge President: International Color Vision Society (ICVS) Research interests visual perception of colour , motion, form and depth genetic basis for individual variations in perception

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Color Vision

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  1. Color Vision Topic 2: History of Color Vision

  2. About the Author Professor: Cambridge President: International Color Vision Society (ICVS) Research interests • visual perception of colour, motion, form and depth • genetic basis for individual variations in perception • nature of the information carried by the cerebral bus • history of neuroscience and of colourtheory

  3. A few terminologies Visible spectrum Trichromacy: Color mixture Color matching Color constancy

  4. Electromagnetic Spectrum

  5. Electromagnetic Spectrum

  6. Visible Spectrum

  7. Light Behavior & Color

  8. Absorb and Reflect

  9. Additive & Subtractive Color Mixture Subtractive mixture – paints, ink or color filterMore light absorbed, so less reflected! Additive – the wavelengths add to each other!More light reflected!

  10. Additive & Subtractive Color Mixture

  11. Red (700 nm) Green (546 nm) Blue (436 nm) Color Matching Matching field Test field rR + gG + bBmM Trichromacy: Given three different colored lights of variable intensities, it is possible to mix them so as to match any other test light of any color.

  12. Chromatic Discrimination

  13. Color Constancy perceived color of objects remains relatively constant under varying illumination conditions

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