can lab color space normalize?
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Guillaume on 1 May 2018
Edited: Guillaume on 1 May 2018
as we all know, the range of lab color space is ...
Not really, this is a convention but like all colour encoding you can use whatever range you wish as long as you define what that range is. The (-128, 127) range was chosen because that's the range of signed 8 bit integers.
While you can use whatever range you wish for your own processing, those matlab functions that expect L*a*b* values expect them to be in the conventional range (0,100) for L* and (-128, 127) for the others. These functions will not work properly if you use a different convention.