bianyan.zip_边沿检测

% f=imread('1.jpg'); % f=rgb2gray(f); % f=im2double(f); % figure; % subplot(2,2,1); % imshow(f); % title('原始图像 '); % %%%%%%%%%%%%%%%%%%%%%%%%%% % SFST=edge(f,'sobel'); % % figure; % subplot(2,2,2); % imshow(SFST); % title('水平和垂直图像边缘检测'); % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % SF=edge(f,'prewitt'); % % figure; % subplot(2,2,3); % imshow(SF); % title('prewitt图'); % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % ST=edge(f,'roberts'); % % figure; % subplot(2,2,4); % imshow(ST); % title('roberts图'); I = imread('11.jpg'); I=rgb2gray(I); %%如果是其他类型图像,请先转换为灰度图 %%没有噪声时的检测结果 BW_sobel = edge(I,'sobel'); BW_prewitt = edge(I,'prewitt'); BW_roberts = edge(I,'roberts'); BW_laplace = edge(I,'log'); BW_canny = edge(I,'canny'); figure; subplot(2,3,1),imshow(I),xlabel('原始图像'); subplot(2,3,2),imshow(BW_sobel),xlabel('sobel检测'); subplot(2,3,3),imshow(BW_prewitt),xlabel('prewitt检测'); subplot(2,3,4),imshow(BW_roberts),xlabel('roberts检测'); subplot(2,3,5),imshow(BW_laplace),xlabel('laplace检测'); subplot(2,3,6),imshow(BW_canny),xlabel('canny检测'); %%加入高斯噪声（μ=0，σ^2=0.01）检测结果 I_g1 = imnoise(I,'gaussian',0,0.01); BW_sobel = edge(I_g1,'sobel'); BW_prewitt = edge(I_g1,'prewitt'); BW_roberts = edge(I_g1,'roberts'); BW_laplace = edge(I_g1,'log'); BW_canny = edge(I_g1,'canny'); figure; subplot(2,3,1),imshow(I_g1),xlabel('加入高斯噪声(μ=0，σ^2=0.01)图像'); subplot(2,3,2),imshow(BW_sobel),xlabel('sobel检测'); subplot(2,3,3),imshow(BW_prewitt),xlabel('prewitt检测'); subplot(2,3,4),imshow(BW_roberts),xlabel('roberts检测'); subplot(2,3,5),imshow(BW_laplace),xlabel('laplace检测'); subplot(2,3,6),imshow(BW_canny),xlabel('canny检测'); %%加入高斯噪声（μ=0，σ^2=0.02）检测结果 I_g2 = imnoise(I,'gaussian',0,0.02); BW_sobel = edge(I_g2,'sobel'); BW_prewitt = edge(I_g2,'prewitt'); BW_roberts = edge(I_g2,'roberts'); BW_laplace = edge(I_g2,'log'); BW_canny = edge(I_g2,'canny'); figure; subplot(2,3,1),imshow(I_g2),xlabel('加入高斯噪声(μ=0，σ^2=0.02)图像'); subplot(2,3,2),imshow(BW_sobel),xlabel('sobel检测'); subplot(2,3,3),imshow(BW_prewitt),xlabel('prewitt检测'); subplot(2,3,4),imshow(BW_roberts),xlabel('roberts检测'); subplot(2,3,5),imshow(BW_laplace),xlabel('laplace检测'); subplot(2,3,6),imshow(BW_canny),xlabel('canny检测');