title: how to detect an image with iPhone camera?
body: <p>I am trying to detect an image of a chocolate wrapper with iPhone/iPad Camera.
  I already got the image frames from video using avcapture. 
  But i can't figure out how to detect a specific part of the image?</p>
  
  <p>Note:- the specific part i am mentioning is a pink ribbon which will always be the same.
         can i match the image? if yes how? or should i get bitmap pixel data and match the unique color codes (but they can vary depending on light conditions and angle at which image is taken)?    </p>