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Image Filter dan Edge Detection. PERMUKAAN IMAGE IMAGE PLANE X Y Graylevel I(x,y)

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Presentation on theme: "Image Filter dan Edge Detection. PERMUKAAN IMAGE IMAGE PLANE X Y Graylevel I(x,y)"— Presentation transcript:

1 Image Filter dan Edge Detection

2 PERMUKAAN IMAGE IMAGE PLANE X Y Graylevel I(x,y)

3 STEP EDGE Gray_1 Gray_2 Sideview

4 DETEKSI EDGE ORDE PERTAMA Prewitt Templates Sobel Templates

5 Isotropic Good Localization Good Signal-To-Noise Characteristics Accurate Determination of Edge Orientation EDGE DETEKTOR YG BAIK BILA:

6 ISOTROPIC EDGE DETECTION

7 SIGNAL-TO-NOISE RATIO AND LOCALIZATION Noise Added to Image Edge Image Smoothed Image Edge Image

8 Contoh pattern berbagai frekuensi

9 TURUNAN DARI STEP-EDGE

10 EDGE OPERATOR ORDE 2 MARR-HILDRETH OPERATOR Dikombinasikan dengan Gaussian smoothing

11 FUNGSI GAUSSIAN 1-D DAN 2-D

12 MEXICAN HAT FILTER

13 EDGE OPERATOR ORDE 2 CANNY OPERATOR: Take second derivative in direction of gradient (Ix,Iy). Look for ‘Zero-Crossing’ of second derivative in this direction. Can also threshold with respect to first order edge strength. Direction of first order gradient (Ix,Iy) gives edge orientation. Proved to have optimal localization properties.


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