title: Zooming in on CIImage or NSImage?
body: <p>I am taking photos from a webcam in my Cocoa application and I would like to zoom in on the centre of the image I receive. I start by receiving a <code>CIImage</code> and eventually save an <code>NSImage</code>.</p>
  
  <p>How would I go about zooming in on either of these objects?</p>