How to fill edges detected by canny in python?

Question

I want to fill the area in the lung edges I detected with cv2.Canny(). For example:

So the result would be something like that:

I tried to find these areas with cv2.SimpleBlobDetection(). But couldn't find away to get the params right. I'm new in OpenCV so maybe I just didn't find the right function yet. The result would be a mask for the lungs so it wouldn't be bad if the edges from the chest are removed by the process. Any tip how to achieve this would be great. Thanks alot!

Answer 1

Instead of Canny, you can try following two OpenCV functions (on the original image): cv.findContours(), cv.drawContours().