title: Detect image resolution?
body: <p>I've made some research and couldn't find the answer. Is it possible to detect an image resolution using an upload file field?</p>
  
  <p>Right now, I can detect the size of an image in pixels...But I would need it to find the "inches" size.
  And I also need to find out the resolution of the image.</p>
  
  <p>Using Javascript would be the best...if possible, if not...PHP maybe?</p>
  
  <p>Thanks!</p>