Lecture - EdgeDetection

# Lecture - EdgeDetection - EE4780 Edge Detection...

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EE 4780 Edge Detection

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Bahadir K. Gunturk 2 Detection of Discontinuities Matched Filter Example >> a=[0 0 0 0 1 2 3 0 0 0 0 2 2 2 0 0 0 0 1 2 -2 -1 0 0 0 0]; >> figure; plot(a); >> h1 = [-1 -2 2 1]/10; >> b1 = conv(a,h1); figure; plot(b1);
Bahadir K. Gunturk 3 Detection of Discontinuities Point Detection Example: Apply a high-pass filter. A point is detected if the response is larger than a positive threshold. The idea is that the gray level of an isolated point will be quite different from the gray level of its neighbors. | | R T Threshold

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Bahadir K. Gunturk 4 Detection of Discontinuities Point Detection Detected point
Bahadir K. Gunturk 5 Detection of Discontinuities Line Detection Example: 1 R 2 R 3 R 4 R

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Bahadir K. Gunturk 6 Detection of Discontinuities Line Detection Example:
Bahadir K. Gunturk 7 Detection of Discontinuities Edge Detection: An edge is the boundary between two regions with relatively distinct gray levels. Edge detection is by far the most common approach for

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## This note was uploaded on 11/28/2011 for the course EE 4780 taught by Professor Staff during the Spring '08 term at LSU.

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Lecture - EdgeDetection - EE4780 Edge Detection...

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