Image Processing ► Canny Edge Detector - Prewitt Edge Dectector -Sobel Edge Detector

Code:

A = imread(‘cameraman.jpg’);    %needs image file “cameraman.jpg”

can = edge(A,'Canny');          %detecting edges using canny method

pre = edge(A,'Prewitt');        %detecting edges using prewitt methd

sob = edge(A,'Sobel');          %detecting edges using sobel method

imshow(can);

imshow(pre);

imshow(sob);

Output:

                      Original Image                                                       Canny Edge Detector

                    Prewitt Edge Detector                                               Sobel Edge Dector

Conclusion for Edge Detectors

Among these 3 edge detectors, Canny edge detector is the better one. This is because canny detects deep edges inside an image and also reduces the number of ‘False’ edges as compared to sobel and prewitt edge detectors.