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RGB to LAB conversion. What are the actual A and B values?

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Amaranta
Amaranta on 6 May 2014
Closed: MATLAB Answer Bot on 20 Aug 2021
Hello everyone,
I've converted from RGB to LAB, and I am aware that the A and B values generated by Matlab do not actually match up with the theory of LAB. I know LAB channels have positive and negative values, but my A and B channels are usually between 100 and 160 for different channels. Can anyone clarify for me what the difference is? And an easy way to convert?
Many thanks

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