Figure 4.

Colour distance validation. a) Original Image, b) True section of glandular light, c) True section of nucleus, d) RGB (Euclidean), e) HSI (NBS), f) CIEL*a*b (CIEDE2000), g) RGB (Euclidean), h) HSI (NBS), i) CIEL*a*b (CIEDE2000). Colour distances validation on different ROIs.