title: Is it possible to set a filter to a background image here?
body: <p>I need to apply filters to my background image and ideally I want to do it where its being added and without changing much existing code. Is it possible to that inside this function? </p>
  
  <pre><code>canvas.setBackgroundImage(image_library_selected_url, function() {
      canvas.renderAll();
      _canvasBrowser_update();
  });
  </code></pre>