Intermediate steps in computation of Γ (P, E) for positive (a) and negative (f) subimages. Images (b) and (g) show clustered regions for their originals. Only red regions of (b) and (g) are give in (c) and (h), respectively. Morphological dilation operation expands (c) as seen in (d), and (h) as in (i). For the positive image, overlapping pixels of red regions of (d) and brown region of (b) is given in (e). In same manner, (j) represents overlapping pixel for negative subimage. The corresponding areas (9857 pixels) in (e) and (4896 pixels) in (j) clearly help classifier distinguish both subimages.