title: Resize CIImage to an exact size
body: <p>I am looking for a way to resize a <code>CIImage</code> to an exact size as I am using a blending <code>CIFilter</code> and need both blended <code>CIImage</code>s to be the same size. I need to use a <code>CIFilter</code> to resize the image as it would be cheaper for me in terms of memory and I can't use Core Graphics etc.</p>
  
  <p>I know there is a <code>CILanczosScaleTransform</code> filter available, but it doesn't allow to resize for an exact size, only scale down or scale up.</p>
  
  <p>Is there a way to make a <code>CIImage</code> to be an exact size, using only <code>Core Image</code>?</p>