Line detection: Difference between revisions

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As can be seen below, if mask is overlay on the image (horizontal line), multiply the coincident values, and sum all these results, the output will be the (convolved image). For example, (-1)(0)+(-1)(0)+(-1)(0) + (2)(1) +(2)(1)+(2)(1) + (-1)(0)+(-1)(0)+(-1)(0)=6 pixels on the second row, second column in the (convolved image) starting from the upper left corner of the horizontal lines.<ref name=":0" /> page 82
 
== Example ==
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