----> If we try to improve this by blurring the image then there won't be any edges.
second eigenvalue denotes isotropic regions ---->
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This image has two regions with different orientations. If we use sobel we get an edge for each line ----> If we try to improve this by blurring the image then there won't be any edges. |
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<--- first eigenvalue corresponds to regions that have a dominant direction
second eigenvalue denotes isotropic regions
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This is the estimated angle dominant direction. Its 90 degrees for the right half because all the edges point up, and 0 degrees for the left half | |||
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This is after sobel, thresholding and non-maximal supression. All edge points are within one point of actual edge. | |||