$ pip3 install numpy
$ pip3 install opencv-python
make sure opencv version is at least 4.0.0
python3 EdgeDetection.py --file [path/to/image/folder]
use trackbar below the window, clear edges remains
use mouse as eraser, pressing left button to remove the part you don't like
right click the mouse for saving the image(no chinese in the path)
press 'n' for next picture
press 'c' for recovering the image
press 'q' for leaving the program