title: Center the image in Matlab
body: <p>I have an image (intensity plot) a nxn square matrix. On the image, I want to choose a point and center the image to that point (to make that point as the center of the image). How can I do that in Matlab?</p>
  
  <p>Also, how can I choose a region (an elliptical) and exclude all the data (intensity points) outside that region?</p>