horizantal and vertical edge detection...

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....

[karkki Balasubramaniam]

this is the output image...

[saba saleem]

how did you get this output? can you give me the MATLAB code of this image? as early as possible. please

Answer 1

[Image Analyst]

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.

[karkki Balasubramaniam]

thanks....

Answer 2

[Dishant Arora]

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

[karkki Balasubramaniam]

thanks yarrr

[Image Analyst]

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).