title: How do you crop a specific area with paperclip in Rails (3)?
body: <p>I have paperclip in Rails (3) working with simple cropping, for example the blow code makes a simple crop of the thumbnail:</p>
  
  <pre><code>has_attached_file :image, :styles =&gt; { :thumb =&gt; "90x90#" }, :default_style =&gt; :thumb
  </code></pre>
  
  <p>However I was wondering how do you crop a very specific area of an image; lets say you have an x and y coordinate to start from and then a width and height of the crop.</p>
  
  <p>How do you go about passing a complex style like this in?</p>