how to produce edge detected image

Question

nita ahmeti 2013-4-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/73105-how-to-produce-edge-detected-image

回答： Mohamed Osman 2017-1-21

 using the Laplacian of the Gaussian or Sobel filters, of user-specified size and parameters where applicable. how to apply filters of varying size

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Answer 1

Chandra Shekhar 2013-4-22

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https://ww2.mathworks.cn/matlabcentral/answers/73105-how-to-produce-edge-detected-image#answer_83082

编辑：Chandra Shekhar 2013-4-22

在 MATLAB Online 中打开

 I = imread('circuit.tif');
 BW1 = edge(I,'prewitt');
 BW2 = edge(I,'canny');
 BW3 = edge(I,'sobel');
 figure, imshow(BW1)
 figure, imshow(BW2)
 figure, imshow(BW3)

Or you can choose manual threshold like,

 BW1 = edge(I,'prewitt',0.4);
 BW2 = edge(I,'canny',0.4);
 BW3 = edge(I,'sobel',0.4);
 figure, imshow(BW1)
 figure, imshow(BW2)
 figure, imshow(BW3)

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Answer 2

Mohamed Osman 2017-1-21

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https://ww2.mathworks.cn/matlabcentral/answers/73105-how-to-produce-edge-detected-image#answer_251430

I = imread('circuit.tif'); imshow(I) BW1 = edge(I,'Canny'); BW2 = edge(I,'Prewitt'); imshowpair(BW1,BW2,'montage') I = gpuArray(imread('circuit.tif')); BW = edge(I,'prewitt'); figure, imshow(BW)