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RGB Color Space
Source: Wikipedia
Color Images CS/BIOEN 4640: Image Processing Basics April 5, 2012 - - PowerPoint PPT Presentation
Color Images CS/BIOEN 4640: Image Processing Basics April 5, 2012 - - PowerPoint PPT Presentation
Color Images CS/BIOEN 4640: Image Processing Basics April 5, 2012 RGB Color Space Source: Wikipedia Additive vs Subtractive Color Models Additive Color Model Subtractive Color Model Visible Light Spectrum Monochromatic colors are light
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Additive vs Subtractive Color Models
Additive Color Model Subtractive Color Model
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Visible Light Spectrum
◮ Monochromatic colors are
light at a single wavelength
◮ Some colors (cyan, pink, ...)
cannot be represented by a single wavelength
◮ These colors are a mixture or
spectrum of wavelengths
Source: Wikipedia
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CIE XYZ Color Space
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CIE XYZ Color Space
460 480 500 520 540 560 580 600 620 x 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 y 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
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MacAdam Ellipses
Source: Wikipedia
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Gamut
Maximum range of colors a display device (monitor, projector, etc.) can reproduce.
Source: Wikipedia
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Hue/Saturation/Value (HSV)
Source: Wikipedia
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Hue/Luminance/Saturation (HLS)
Source: Wikipedia
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Converting RGB to Grayscale
Simple average:
Y = R + G + B 3
Better weights for perception:
Y = 0.299 R + 0.587 G + 0.114 B
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