The result is different between Python ver and CPP why? The merging Function?

[David-dotcom666]

[Gofinge]

Yes, I remembered differences exist between the two versions, but it has been almost one year, and I forgot the reason. The Python version was just for convenience to try some optimization. However, suppose you want to apply the original C++ version to your Python project. Then, I also provide a C++ version with Pybind, which you can directly try the original CannyLine in your python and much more fast.