How to find endpoints of lines in OpenCV?

Question

I have an image made up of lines; how can I find the endpoints with OpenCV?

The lines are about 20 pixels wide. They turn, branch, and can be at angles (although mos

Answer 1

I speak Chinese, while my English is poor.

So I just post my core steps.

A general way to find endpoints of lines is:

1. Binary the gray image.
2. Find the skeleton of the binary image.
3. Do hit-miss operation (all end points) or goodFeaturesToTrack(all corners include endpoints) on the skeleton.

Notice:

You should select a good skeleton method to make sure that the endpoints wouldn't shrink(while my example does shrink).

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This is the result.

This is a demo using hit-miss to find special points.