Write a Matlab program for Edge Detection- use of Sobel, Prewitt and Roberts Operators

Code:

clear;

clc;

a = imread('d:/matimage/baby.jpg'); % Read image from graphics file

a=rgb2gray(a); % Convert RGB color image or color map to grayscale

b=edge(a,'roberts'); % Find edges in grayscale image using Robert operator

c=edge(a,'sobel'); % Find edges in grayscale image using sobel operator

d=edge(a,'prewitt'); % Find edges in grayscale image using prewitt operator

subplot(2,2,1),imshow(a),title('Original Image');

subplot(2,2,2),imshow(b),title('Roberts');

subplot(2,2,3),imshow(c),title('Sobel');

subplot(2,2,4),imshow(d),title('Prewitt');

Output: