how to add border around an image in opencv python : <p>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 original image stays as-is in the middle. </p>

<p><a href="https://i.stack.imgur.com/ZxORX.jpg" rel="noreferrer"><img src="https://i.stack.imgur.com/ZxORX.jpg" alt="enter image description here"></a></p>
