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How to convert sRGB to CIELAb and CIELab to sRGB efficiently? [closed]

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c++

srgb

I don't understand how to convert sRGB to CIELab and backward. Help me please. it's desirable in с++ code

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Conficker Avatar asked Oct 12 '10 13:10

Conficker

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A common workaround to convert sRGB to linear is to raise the values to the power of 2.2 (using a gamma node with gamma value of 2.2). To convert from linear to sRGB, you'd use a gamma value of 0.4545.

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1 Answers

Convert from sRGB to RGB by applying inverse gamma, convert RGB to XYZ using 3x3 matrix, convert XYZ to Lab using standard formula and D6500 white point

References:

  • Lab http://en.wikipedia.org/wiki/Lab_color_space
  • sRBG http://en.wikipedia.org/wiki/SRGB_color_space

The rest... you can do on your own :-)

like image 101
Artyom Avatar answered Nov 08 '22 08:11

Artyom
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