February 2019
Intermediate to advanced
260 pages
6h 3m
English
By now, you have an idea of what the edge detection is doing, but let's go back through what's happened so far.
Let's suppose we take the black and white screenshot again, and we have the two filters in different positions: a vertical filter with red, and the horizontal filter with green:

Now, regardless of their position and shape, they have one thing in common: the middle column and the middle row are completely ignored, because of the zeros:

These two filters are only interested in the sides. And depending on these ...
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