131.

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Page 215

Figure 5.16 Two texture patterns in (a) and (b) and their corresponding GLCMs (before normalisation) shown in (c) and (d), and (after normalisation, each entry being divided by 2–127–128) in (e) and (f).

(2) Contrast (Con):

(5.41)

This measure assigns a higher weight to the p(i, j) that are distant from the main diagonal of the GLCM. When the difference between neighbouring pairs becomes large, the contrast increases. In this situation, co-occurrence frequencies p(i, j) will have higher values away from the main

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