title: iOS: Get pixel-by-pixel data from camera
body: <p>I'm aware of AVFoundation and its capture support (not too familiar though). However, I don't see any readily-accessible API to get pixel-by-pixel data (RGB-per-pixel or similar). I do recall reading in the docs that this is possible, but I don't really see how. So:</p>
  
  <ol>
  <li>Can this be done? If so, how?</li>
  <li>Would I be getting raw image data, or data that's been JPEG-compressed?</li>
  </ol>