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

Claim 0:
1. A method of measuring chromaticity of a target object, the method being implemented using an apparatus that includes a processor and that stores a plurality of light source spectrum datasets each associated with a specific object, and comprising steps of:
A) obtaining a captured color image of the target object;
B) generating a spectral image based on the captured color image using a spectral transformation matrix;
C) obtaining one of the plurality of light source spectrum datasets that is associated with the target object; and
D) calculating a chromaticity dataset of the target object based on the spectral image and the one of the plurality of light source spectrum datasets;
wherein step D) includes sub-steps of:
D1) for each of a plurality of pixels contained in the spectral image, obtaining a set of tristimulus values using a plurality of color matching functions of the CIE 1931 XYZ color space; and
D2) calculating the chromaticity dataset of the target object based on the sets of tri stimulus values respectively obtained for the pixels contained in the spectral image.