p0402.m

程序代码说明 P0401：用Prewitt算子检测图像的边缘 P0402：用不同σ值的LoG算子检测图像的边缘 P0403：用Canny算子检测图像的边缘 P0404：图像的阈

I = imread('bacteria.BMP');
BW1 = edge(I,'log',0.003);  % σ=2
imshow(BW1);title('σ=2')
BW1 = edge(I,'log',0.003,3); % σ=3
figure, imshow(BW1);title('σ=3')