LAPLACE OPERATOR.ppt [Lecture seule]
LAPLACE OPERATOR.ppt [Lecture seule]
LAPLACE OPERATOR.ppt [Lecture seule]
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LOG filter (Laplacian of Gaussian)r = x + y2 2 2⎛ ⎞∇ = − − ⋅πσ ⎝ 2σ⎠2 r2 1 r −2G(x,y) 1 e σ4 ⎜ 2 ⎟221Where 4 normalizes the sumπσof filter coefficients to 1,and σ controls the width of themain lobe.