title: Displaying text under mouse cursor using OpenCV
body: <p>I am reading an image using OpenCV. It looks like when I click on a pixel then I could display the pixel coordinates and info using the <code>cv2.setMouseCallback()</code> function. I want to display those info right under the mouse cursor.</p>
  <p>I searched Google and it looks like I need to use GUI libraries. Is there a similar function in OpenCV?</p>