title: How to use the Nokia Imaging SDK's BlendFilter on WP8?
body: <p>I'm staring with the Nokia Imaging SDK to play a little with it. Now, I'm facing the problem where I have an Image which already exists (in a folder in my visual studio solution) and I want to convert this image in order to use it in the <strong>BlendFilter</strong> class of the <strong>Nokia Imaging SDK</strong>. However I don't know how to use it.</p>
  
  <p>I was trying to convert the existing image in a stream and then pass it as a parameter to the <strong>BlendFilter</strong> constructor. But not luck. The compiler says that the best overload method match ... has some invalid arguments.</p>
  
  <p>This is the way I'm trying to load the existing image to a stream:</p>
  
  <pre><code>Image image = new Image();
  image.Source = new BitmapImage(new Uri("/Images/Template3.2.png", UriKind.Relative));
  
  BitmapImage bitImage = new BitmapImage(new Uri("/Images/Template3.2.png", UriKind.Relative));
  
  WriteableBitmap Bitmap = new WriteableBitmap(bitImage);
  </code></pre>
  
  <p>And then:</p>
  
  <pre><code>var BlendFilter = new BlendFilter(bitImage, BlendFunction.Add);  --&gt; the compiler error is here
  </code></pre>
  
  <p>Does anyone know how to use the <strong>BlendFilter</strong> class? any example would be very helpful.</p>
  
  <p>Regards!</p>