그레이로 만드는 방법



1. lightness : (max(R, G, B) + min(R, G, B)) / 2


2. average : (R + G + B) / 3 (가장 간단하고 저렴한)


3. luminosity : 0.21 R + 0.72 G + 0.07 B(사람의 눈이 빛에 반응하는 민감도에 따라)

  - BT709 Greyscale : Red: 0.2125 Green: 0.7154 Blue: 0.0721

  - RMY Greyscale : Red: 0.5 Green: 0.419 Blue: 0.081

  - Y-Greyscale (YIQ/NTSC): Red: 0.299 Green: 0.587 Blue: 0.114

  - 추가 : http://jscience.org/experimental/javadoc/org/jscience/computing/ai/vision/GreyscaleFilter.html


이중 가장 맘에 드는걸로 선택


Original image color photo of sunflower
Lightness sunflower converted to grayscale using lightness algorithm
Average sunflower converted to grayscale using average algorithm
Luminosity sunflower converted to grayscale using luminosity algorithm


관련 링크 -> http://www.johndcook.com/blog/2009/08/24/algorithms-convert-color-grayscale/



자세한 색상 정보




관련 링크 -> http://www.johndcook.com/blog/2009/08/24/more-on-colors-and-grayscale/



Posted by Hwanggoon
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