Sobel Operator no threshold

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.

Answer 1

[Image Analyst]

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

[GARRETT]

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]

For 256 bins, you could use

h = hist(Gmag(:),256);

Answer 2

[Anand]

[Gx,Gy] = imgradientxy(im,'sobel');