title: How to find the location of red region in an image using MATLAB?
body: <p>How to find the location of red region in first image and mark the same location in grayscale image using matlab?</p>
  
  <p><img src="https://i.stack.imgur.com/EWvAV.png" alt="Colored Image"></p>
  
  <p><img src="https://i.stack.imgur.com/BBxQh.png" alt="Marked Image"></p>