{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Lecture-7 - Lecture-7 Edge Detection LG Canny Edge...

This preview shows pages 1–4. Sign up to view the full content.

1 Lecture-7 Edge Detection: LG, Canny Edge Detection

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
2 Edge Detectors • Gradient operators: Sobel, Prewit, Robert • Laplacian of Gaussian (Marr-Hildreth) • Gradient of Gaussian (Canny) • Facet Model Based Edge Detector (Haralick) Laplacian of Gaussian Edge Detector • Generate a mask for LG for a given • Apply mask to the image • Detect zerocrossings – Scan along each row, record an edge point at the location of zerocrossing. – Repeat above step along each column s
Laplacian of Gaussian 2 2 2 2 ) ( ) , ( o y x e y x g + - = 2 2 2 2 ) ( 2 ) ( ) , ( o o y x e x y x g x + - - = 2 2 2 2 2 2 2 ) ( 2 2 ) ( 2 2 2 2 ) 1 ( ) )( ( ) , ( o o o o o y x y x e e x x y x g x + - + - - + - - = 2 2 2 2 ) ( 2 2 2 2 2 ) 1 ( 1 ) , ( o o o y x x y x g x + - - - = Laplacian of Gaussian 2 2 2 2 ) ( 2 2 2 2 2 ) 1 ( 1 ) , ( o o o y x xx x y x g x g + - - - = = 2 2 2 2 ) ( 2 2 2 2 2 ) 1 ( 1 ) , ( o o o y x yy y y x g y g + - - - = = 2 2 2 2 2 2 2 ) ( 2 2 2 2 ) ( 2 2 2 2 2 2 2 2 ) 1 ( 1 ) 1 ( 1 ) , ( ) , ( ) , ( o o o o o o y x y x y x y x g y y x g x y x g + - + - - - - - = + = 2 2

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

Page1 / 15

Lecture-7 - Lecture-7 Edge Detection LG Canny Edge...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online