I have a pandas dataframe From To A B A C D E F F B G B H B I G J G K L L M M N N I want to convert it into multi column hierarchy. The expected hierarchy will look like Level_1 Level_2 Level_3 Level_4 A B G J A B G K A B
Tag: hierarchy
Drawing a contour in a specific region of an image and finding the outermost contour in opencv-python
My code selects a frame from a video which is than subtracted with a background frame selected from the same video. It is then converted to grayscale, blurred, and then an image threshold is applied. Then a contour is drawn which outputs this image. However, I would only like to have the outermost contour and also not have any contours