Homework #2 Edge Detection

Visual Perception Modeling and Its Applications

CIS 4930/5930, Spring 2001

Department of Computer Science, Florida State University

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Due: Week 8, Monday, Feb. 26, 2001

Points: 100

Based on the edge detection algorithms discussed in the class, answer the following questions.

1. Briefly state why edge detection is an important problem in computer vision.
2. Any edge detector should produce no response to an image with a constant color. State the condition on any edge detector kernel to satisfy the requirement.
3. Using the canny program distributed in class, detect edges of an image of your own interest at scales of 1, 2, 4 and 8 (using the –d option).
4. State the major steps in the canny edge detector program.