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Has anyone done the question of maximum gradients?

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Post time: 2020-1-7 11:20:01
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The processed image is a binary image, 1 and 0, 1 is the target pixel, and 0 is the background
All lines are closed or not closed, similar to the contour lines of the map

Now I want to find out where the two lines see the maximum gradient direction, which is the densest direction. How to find it?
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Post time: 2020-8-21 19:15:01
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Don't know this

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Post time: 2020-9-2 08:30:01
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Can use horizontal and vertical projection
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