How to fill contours in opencv python

1. How do I fill an area in OpenCV?
2. How do you fill a polygon in OpenCV?
3. How do you draw contour in OpenCV?

How do I fill an area in OpenCV?

The function cv::floodFill fills a connected component starting from the seed point with the specified color. The connectivity is determined by the color/brightness closeness of the neighbor pixels. Now the output mask is ready, you can just show it or write it using cv2. imwrite( ).

How do you fill a polygon in OpenCV?

Step 1: Import cv2 and numpy. Step 2: Define the endpoints. Step 3: Define the image using zeros. Step 4: Draw the polygon using the fillpoly() function.

How do you draw contour 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.