title: skimage sample from non-integer locations in image?
body: <p>We can sample from integer positions in an image because images are constructed as 2d arrays, and we just take whatever data is sitting in the array location.</p>
  
  <p>With non-integer positions, like say between two pixels, this is not so straightforward. However, it's such a common problem that (for ex.) GPUs have this functionality baked into the hardware so long as you're satisfied with linear interpolation. I can't find any functionality for this in skimage, but it seems so fundamental to image processing that I feel like I must be missing something.</p>
  
  <p>I would expect something like:</p>
  
  <pre><code>sample(img, (64.5, 120.37), interpolation='linear')
  </code></pre>