空間フィルタリング (spatial ... - clg.niigata-u.ac.jp

(spatial filtering) (spatial filter) ( linear filter) (nonlinear filter) (1) (1) wwnwwmnmhnjmifjig,,,f (i, j) g (i, j) h (m, n) (2w+1) (2w+1) dyyxfyfxf21 5 5 1 5 5 1 5 5 1 5 5 1 1 1 1 1 5 5 5 5 1 1 4 4 1 1 1 1 1 1 1 1 1 1 1 4 1 1 1 4 4 4 1 1 1 4 4 4 1 1 1 4 4 4 4 4 4 4 4 4 4 4 4 (0, 0) i j (3, 0) f(i, j) f(i, j) f(7, 2) = 4 pixel by pixel (i, j) f(4, 3) g(4,3) = 1 a 1 b 1 c 1 d 1 e 1 f 4 g 4 h 4 i b c a e f d h i g h(m, n) 3 3 w = 1 -1 -1 -1 -1 9 -1 -1 -1 -1 50 50 50 50 100 100 120 120 120 240 (i, j) i, j 50 (-1)+50 (-1)+50 (-1) +50 (-1)+100 9+100 (-1) +120 (-1)+120 (-1) +120 (-1) = 240 (smoothing) (edge extraction)

空間フィルタ (spatial filter) 線形フィルタ (linear filter) 非線形フィルタ (nonlinear filter) フィルタ，カーネル，

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