title: Find the lowest white pixel
body: <p>I have this binary image.<a href="https://i.stack.imgur.com/PKvZS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/PKvZS.png" alt="enter image description here"></a></p>
  
  <p>How do i find the coordinate of the lowest white pixel?</p>