title: IOS 5: Image Filters
body: <p>i'm searching about image filters using ios5 sdk but i have two questions:</p>
  
  <ol>
  <li><p>For Mac Os X seems to be a lot of filters that are not available in IOS SDK. Is it possible to implement them or have they already been implemented?</p></li>
  <li><p>Is there an open-source library with filters like Instragram uses?</p></li>
  </ol>
  
  <p>Thanks!</p>