(a) Derive Eq. (10.2-27). (10.2-27)(b) Let k = σ1/σ2 denote the standard deviation ratio d...

(a) Derive Eq. (10.2-27).

(10.2-27)

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(b) Let k = σ1/σ2 denote the standard deviation ratio discussed in connection with the DoG function. Express Eq. (10.2-27) in terms of k and σ2.