Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Color difference of CIEDE2000 based on KPLS model under different hyperparameter combinations: (a) Based on polynomial kernel function expansion; (b) Based on Gaussian kernel function expansion; (c) Based on root polynomial kernel function expansion.
