ABSTRACT
The fourth chapter starts with edge detection, the need for detecting edges, and goes through the types of edges with appropriate pictorial representations. The steps in edge detection are detailed thereafter along with the frequently used edge detection algorithms. A thorough explanation of the Sobel edge detector with its corresponding MATLAB code rounds out the discussion. In the same way, Prewitt, Robinson, Krisch, and Canny edge detectors are explained with their appropriate MATLAB codes. The Laplacian edge detector is also covered along with the disadvantages of the approach. A table of comparison for the edge detection techniques is then presented, followed by discussion questions and answers, with the chapter ending with suggestions for additional reading.
