Sobel Operator no threshold

2014 3 3
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更新时间：2014 3 4
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I'm using the "edge(img,'sobel')" function but it returns a matrix that is logical. Is there a way to make it a uint8? I want to see it just the filtering.

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Image Analyst
Image Analyst 2014-3-3

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Don't use edge(). Use imgradient() instead. You will get the actual Sobel filtered image.

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GARRETT
GARRETT 2014-3-3
Thanks that worked, how would I show the histogram for it?
I was able to see it by [Gmag, Gdir] = imgradient(img,'sobel'); imshow(Gxy,[]);
Anand
Anand 2014-3-4
For 256 bins, you could use
h = hist(Gmag(:),256);

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