Dear Anup,

I think that 'colour constancy' is the keyword

YCbCr is a color space with luminance and chrominance separated

you can find more information about color model here:

www.poynton.com/PDFs/coloureq.pdf

https://www.researchgate.net/publication/258333832_An_Appropriate_Color_space_to_Improve_Human_Skin_Detection?ev=prf_pub

Article An Appropriate Color space to Improve Human Skin Detection

The color model l1 l2 l3 proposed by T.Gevers -[1999] is a photometric invariant for matte as well as for shiny surfaces. These color features determine uniquely the direction of the triangular color plane spanned by the two reflection terms.

you can find the paper in the attachment.

thanks for your suggestion Ehsan, let me try on my data

Check out this: http://luthuli.cs.uiuc.edu/~daf/papers/colorconst.pdf