Suppose that an image f(x, y)is convolved with a mask of size n × n (with coefficients 1/n2) to produce a smoothed image .
(a) Derive an expression for edge strength (edge magnitude) of the smoothed image as a function of mask size. Assume for simplicity that n is odd and that edges are obtained using the partial derivatives
(b) Show that the ratio of the maximum edge strength of the smoothed image to the maximum edge strength of the original image is 1/n. In other words, edge strength is inversely proportional to the size of the smoothing mask.
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