How to convert RGB to CIE Lab color space.

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Deepak Panda on 14 Oct 2015

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Answered: Walter Roberson on 14 Oct 2015

Accepted Answer: Walter Roberson

Is there any difference between these two procedures of rgb to lab conversion.

1. colorTransform = makecform('srgb2lab'); lab = applycform(rgbImage, colorTransform);

2. rgb2lab

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Accepted Answer

Walter Roberson on 14 Oct 2015

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makecform('srgb2lab') uses WhitePoint 'ICC' by default. rgb2lab() uses whitepoint 'D65' by default.

http://www.mathworks.com/help/images/ref/makecform.html

https://en.wikipedia.org/wiki/ICC_profile "a 16-bit fractional approximation of D50"

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