Table 6.

Summary of Euclidean distances between clusters, self-reported scores and cluster populations when L*a*b* colour pixels are clustered

Clustering metric	Example A	Example B	Example C
K-means cluster
Distance	3.58	11.75	13.52
GMM cluster
Distance	1.03	10.27	13.09
GMM Average
Log-likelihood	− 6.90	− 8.50	− 8.89
K-means cluster population
(Green/Blue)	64% / 36%	51% / 49%	59% / 41%
GMM cluster population
(Green/Blue)	73% / 27%	53% / 47%	83% / 17%

Example labels refer to Fig. 8. The cluster distances were calculated via $\mathrm{\Delta }$E* CIEDE2000.GMM: Gaussian mixture model