This will result in a new 3 × 3 coherency matrix, and entropy estimates of this matrix are termed
modied entropy. Modied entropy has been derived by replacing diagonal elements of the coher-
ency matrix with FRE3 model decomposed powers and proposed model decomposed powers. Both
entropy images are compared with the original entropy image.
From Figure 3.28, it is evident that the proposed model has reduced the entropy estimates to a
lower range for urban targets, as seen in the black illustration. The generic entropy derived from the
FRE3 model shows high entropy estimates for the urban targets. ...
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