horizantal and vertical edge detection...

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karkki Balasubramaniam
评论： Image Analyst 2017-10-29
Use a spatial filter to get the horizontal edge of the image. Use a spatial filter to get the vertical edge of the image (read the MATLAB documentation on fspecial). Add the horizontal edge matrix to the vertical edge matrix to yield the following results:
i donot know, how to do this....
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saba saleem
saba saleem 2017-10-29
how did you get this output? can you give me the MATLAB code of this image? as early as possible. please

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Image Analyst
Image Analyst 2014-3-8
There are functions imgradient() and imgradientxy() that are what you want. You might try converting into hsv colorspace and doing the gradient on just the H or just the V channels, or try all 3. Compare them and pick whichever combination gives you the "best" edges.

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Dishant Arora
Dishant Arora 2014-3-8
Documentation says it all,use sobel or prewitt to realize horizontal edge detecting filter. read the manual thoroughly and go through the examples to see hoe it works.
doc fspecial
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Image Analyst
Image Analyst 2017-10-29
Yes. You're just showing the kernel. If you want to see the edge image, call imgradient() or else some other way filter the badly-named "a" with the "h" kernel. The call imshow(a).

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