Patent ID: 11928842
Assignee: NATIONAL CHUNG HSING UNIVERSITY
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. The apparatus of claim 5, wherein the chromaticity dataset of the target object includes, for each of the pixels, a set of chromaticity coordinates, and said processor is configured to:
calculate the set of tristimulus values (X, Y, Z) by

X=∫0∞I(λ)x(λ)dλ

Y=∫0∞I(λ)y(λ)dλ

Z=∫0∞I(λ)z(λ)dλ, where I(λ) represents the one of the plurality of light source spectrum datasets, x(λ), y(λ) and z(λ) represent the color matching functions of the CIE 1931 XYZ color space;
calculate the set of chromaticity coordinates (x, y) for each of the pixels is by, x
   =
   
    X
    
     X
     +
     Y
     +
     Z
    
   
  
  ,
  and
 

 
  y
  =
  
   
    Y
    
     X
     +
     Y
     +
     Z
    
   
   .