How to convert an image from rgb to lab by pixel by pixel matrix???

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pritha Das on 20 Oct 2013

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Commented: Image Analyst on 26 Oct 2013

like i have image...i have to read it in matlab...then if i want to change the rgb values of the image to lab values...then what will b its steps.... i mean L* A* B* values

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sixwwwwww on 20 Oct 2013

What do you mean by lab values? Can you please explain?

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Answer 1

Matt Kindig on 25 Oct 2013

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https://ww2.mathworks.cn/matlabcentral/answers/90863-how-to-convert-an-image-from-rgb-to-lab-by-pixel-by-pixel-matrix#answer_112684

You can convert rgb to L*A*B colorspace using the makecform() and applycform() functions. From the documentation:

cform = makecform('srgb2lab');
lab_IMG = applycform(IMG,cform);

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pritha Das on 26 Oct 2013

i mean to say....for rgb image we can plot matrix from 0-255...then if we convert rgb to L*a*b then we can get another matrix from the image of converted L*a*b...to i want to know how to do that?i mean i how to plot matrix of a image...then how we can change that matrix to its correspond l*a*b values using coding in matlab

pritha Das on 26 Oct 2013

look what u have provided it is working...it directly converts a rgb image to its L*a*b color space value... bt if want to the same thing in matrix form then what will b the coding

Image Analyst on 26 Oct 2013