title: Python convert 32 bit to 16 bit tiff
body: <p>Is there a simple way to convert a 32-bit .tif to 16-bit .tif?  In IDL, write_tiff allows /short instead of /float.  Does Python do that?  Instead, I have tried this:</p>
  
  <pre><code>i32 = Image.open('image.tif')
  &lt;Image.Image image mode=F size=2016x2016 at 0x102A3E998&gt;
  i32.convert('L').save('newimage.tif')
  </code></pre>
  
  <p>ImageJ (viewer) opens the tif and says that this image is 8-bit, not 16-bit.</p>