title: Python SKIMAGE Exposure rescale_intensity Colorbar
body: <p>I am currently processing a low contrast image in Python, using the rescale_intensity function under the SciKit Image module.</p>
  
  <p>I increase the contrast on the interesting (and relatively small) data range by specifying the second and 98th percentiles of the data set:</p>
  
  <pre><code>p1, p2 = np.percentile(im, (2, 98))
  </code></pre>
  
  <p>and define the new, contrasted image:</p>
  
  <pre><code>im2 = skimage.exposure.rescale_intensity(im, in_range = (p1, p2))
  </code></pre>
  
  <p>This works just as expected, but when I display the colorbar, the data is shifted to the range [-1, 1]. Any way I can rescale the colorbar accordingly?</p>