How to find area of target in an image?
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I need to find out signal to noise or clutter ratio like this.
SNR=double summation(A(i,j)^2/B(m,n)^2) where B[M × N] is B-san data, A[I × J ] is the area of target, A(i, j) and B(m,n) are normalized gray
value (I could not insert a formulae that's why I have written snr equation very badly). my query is how to find area of target in image as I have uploaded