Extract contour from image opencv-python

1. How do you get contours in OpenCV?
2. How do you find the contours in OpenCV Python?

How do you get contours in OpenCV?

To draw the contours, cv. drawContours function is used. It can also be used to draw any shape provided you have its boundary points. Its first argument is source image, second argument is the contours which should be passed as a Python list, third argument is index of contours (useful when drawing individual contour.

How do you find the contours in OpenCV Python?

OpenCV has findContour() function that helps in extracting the contours from the image. It works best on binary images, so we should first apply thresholding techniques, Sobel edges, etc.