title: How to make android camera to capture particular area inside the screen?
body: <p>I want to make a android custom camera to capture particular area like card io. I want to capture the image inside the boundaries. want to show the border in the screen also.I am using opencv for this </p>
  
  <p>Attached the image for reference
  <img src="https://i.stack.imgur.com/QurcT.png" alt="enter image description here"></p>