title: Remove black header section of image using Python OpenCV
body: <p>I need to remove the blackened section in multiple parts of image using Python CV. 
  I tried with denoising which doesn't give satisfactory results.</p>
  
  <p>Eg. I need to remove the blackened part in Table Header (below image) and convert the header background to white with contents as black.</p>
  
  <p><a href="https://i.stack.imgur.com/eEpTT.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/eEpTT.jpg" alt="enter image description here"></a></p>
  
  <p><strong>Can anyone help me with choosing the correct library or solution to overcome this?</strong></p>