Figure 5.

Plots showing the variations in the difference between the saturation and luminance, i.e. S-V and the luminance (V) of the fold pixels against different values of the enhancement coefficient, α. Each plot was produced by taking the average of 500 1×1 pixel fold samples for each image. (a) Plot illustrating the tendencies of the S-V values for the two set of images, i.e. scanned by Dmetrix and that of NDP scanner, for different values of α. (b) Plot demonstrating the effect on the luminance of the fold pixels for different values of α. It is observed from this plot that the luminance of the pixels do not significantly vary beyond α =1.5