lecture10 - CAP5415 Computer Vision Spring 2003 Khurram...

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Unformatted text preview: CAP5415 Computer Vision Spring 2003 Khurram Hassan-Shafique Sobel Edge Detector Detecting Edges in Image Image I --- 1 1 2 2 1 1 --- 1 2 1 1 2 1 * * I dx d I dy d 2 2 + I dy d I dx d Threshold Edges Sobel Edge Detector I dx d I dy d I Sobel Edge Detector I 2 2 + = I dy d I dx d 100 = Threshold Marr and Hildreth Edge Operator Smooth by Gaussian Use Laplacian to find derivatives I G S * = 2 2 2 2 2 1 y x e G +- = S y S x S 2 2 2 2 2 + = Marr and Hildreth Edge Operator ( 29 I G I G S * * 2 2 2 = = 2 2 2 2 2 2 2 3 2 2 2 1 y x e y x G +- +-- = Marr and Hildreth Edge Operator 2 2 2 2 2 2 2 3 2 2 2 1 y x e y x G +- +-- = 0.0008 0.0066 0.0215 0.031 0.0215 0.0066 0.0008 0.0066 0.0438 0.0982 0.108 0.0982 0.0438 0.0066 0.0215 0.0982 0 -0.242 0 0.0982 0.0215 0.031 0.108 -0.242 -0.7979 -0.242 0.108 0.0310....
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This note was uploaded on 06/12/2011 for the course CAP 5415 taught by Professor Staff during the Fall '08 term at University of Central Florida.

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lecture10 - CAP5415 Computer Vision Spring 2003 Khurram...

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