Computation of Non directional Edge

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i want to compute non directional edge of an image block, how i can compute, the simple edge method, will return non directional edge? if no please suggest me the solution

Accepted Answer

Image Analyst
Image Analyst on 29 Jan 2013
You can convolve with the Laplacian, which is like the average edge over all 4 directions (vertical, horizontal, and the two diagonals).
kernel = [-1, -1, -1; -1, 8, -1; -1, -1, -1];
highPassFilteredImage = conv2(double(originalGrayImage), kernel, 'same');
  1 Comment
M@lik Ali
M@lik Ali on 31 Jan 2013
its good its result in matrix, so if i need a value then what i should do, and if i want to count the edges then what is the procedure. Actually i need to count the edges in a sub image then categories the edges in 5 types, i-e. non directional, vertical , horizontal , and both diagonals, please help me out.

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