So- there is a lot of work done on skin color interaction with wearables (this is at least part of my work currently)- it's just not that easy to solve, yet....
That paper above has a significant flaw, even if the outcome matches, due to additional overlooked (by the authors) complexities that aren't essential to the basic (well-understood) principle of darker= more aborptivity=less reflectance.
So- there is a lot of work done on skin color interaction with wearables (this is at least part of my work currently)- it's just not that easy to solve, yet....
That paper above has a significant flaw, even if the outcome matches, due to additional overlooked (by the authors) complexities that aren't essential to the basic (well-understood) principle of darker= more aborptivity=less reflectance.