title: how to prevent plt imshow from normalize image
body: <p>Let's say i have an image where maximum value is 1 and minimum is 0.8 (very brighty image).</p>
  <p>when i use <code>plt.imshow(image)</code> i expect to see high intensity image, but for some reason i still see black, that means that plt.imshow normalize the range <code>[0.8,1]</code> to be <code>[0,1]</code></p>
  <p>how can i see the image without this normalization process?</p>
  <p>for example, here is my image:
  <a href="https://i.stack.imgur.com/FEVFN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/FEVFN.png" alt="enter image description here" /></a></p>
  <p>and min value is 0.57, where max value is 1. so why there is black in the image..?</p>