What can I use to retreive the area that a user marks on an image in my app?
<p>My app takes a picture of the user and I want the user to mark where their eyes, mouth, and ears are on the image. The ears are just one point but the mouth is a selection of the whole mouth area</p>

<p>I have got the taking a picture part done but how can I go on about allowing the user to highlight he mouth area and then get those pixels? </p>
