ColorVisionLecture

ColorVisionLecture - 1 Color Vision Color Vision 2 Color...

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Unformatted text preview: 1 Color Vision Color Vision 2 Color Vision Identifying a Color • Hue is the quality associated with a color name (red, green, blue) – Achromatic colors are neutrals • Lightness - perception of brightness • Saturation - extent that a color departs from neutral Color Vision Hue • When discussing color photography - the additive primaries are red , green and blue • Combining pairs of these in light produces cyan , magenta and yellow- referred to as the additive secondary colors or subtractive primaries 3 Color Vision Eye Cross Section and Cone Spectral Sensitivities S range 400-500nm Peak 440nm M range 450-630nm Peak 544nm L range 500-700nm Peak 580 nm Color Vision 4 Color Vision Rods & Cones • Cones 7 million • Rods 120 million • Total 127 million • Ganglion Cells 1 million • 127:1 Convergence ratio • In fovea 1:3 ratio Color Vision Rod and Cone Distribution 5 Color Vision Dark Adaptation • Changes in the overall visual sensitivity upon a change from a brightly illuminated environment to a dimly light environment • Ex. Daylight into a dark theater Color Vision Light Adaptation • Change in the overall visual sensitivity upon a change from a dimly illuminated environment to a brightly illuminated environment • Ex. Dark theater to bright daylight outside 6 Color Vision Lightness • Perception of brightness • Humans response range is 10 trillion:1...
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This note was uploaded on 04/21/2008 for the course M&P 072 taught by Professor Salvaggio during the Winter '07 term at RIT.

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ColorVisionLecture - 1 Color Vision Color Vision 2 Color...

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