title: How can anti-aliasing be enabled in a pyqtgraph ImageView?
body: <p>I'm using <code>pyqtgraph</code>'s <code>ImageView</code> widget to display an image that needs to be scaled up by a factor of 1.25 to 1.5 to be comfortably viewed. This makes the nearest-neighbor sampling of the image obvious and distracting. The <code>setAutoDownsample</code> method on the <code>ImageItem</code> instance inside of the <code>ImageView</code> instance helps when a large image is scaled very small. But <em>how can I enable anti-aliasing to improve the appearance of a small image that's being scaled up?</em></p>
  
  <p>I have tried calling the <code>setAntialiasing</code> method of the <code>GraphicsView</code> instance inside the <code>ImageView</code> instance, but this has no effect. It may be due to the note in the documentation:</p>
  
  <blockquote>
    <p>Note that this will only affect items that do not specify their own antialiasing options.</p>
  </blockquote>
  
  <p>But I cannot understand what items in the <code>GraphicsView</code> might have their own options, or how to change these.</p>