opencv2_The research of Sobel operation by KUAN YU CHOU
If you want to find and obtain the result of horizontal edges , you need to use the vertical derivative(The derivative of Y )
If you want to find and obtain the result of vertical edges , you need to use the horizontal derivative(The derivative of X )
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At first , I try to capture the result of horizontal edges (the derivative of Y )
In this case , you can see the morphology of Closed-operation ( dilate first, and then erode )
dilate is a word related to "expand" and "swell"
erode is a word related to "minify" and "narrow"
the Closed-opertion will help us to delete the white space between each of horizontal edges and connect the area which is filled with much edges.
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