Editing a Photo | From ( X by Y ) to ( A by A )
<p>When I upload my Facebook photo there are no requirements on the x and y dimensions of the photo.  However Facebook finds a way to insert a 50px by 50px photo that is not distorted into the news feed.  </p>

<p>The only way you could do this, unless I am mistaken, is by cropping the image so that x and y are equal and then scaling to 50px by 50px.</p>

<p>But I never see any photos with like half a face or off-centered.  So how do they determine how to do the cropping.  Are they using some sort of face detection algorithm or are users required to to this centering manually?</p>
