how to add border around an image in opencv python

Question

If I have an image like below, how can I add border all around the image such that the overall height and width of the final image increases but the height and width of the

Answer 1

Answer in one line

outputImage = cv2.copyMakeBorder(
                 inputImage, 
                 topBorderWidth, 
                 bottomBorderWidth, 
                 leftBorderWidth, 
                 rightBorderWidth, 
                 cv2.BORDER_CONSTANT, 
                 value=color of border
              )