title: how to show RGB images in python
body: <p>I have a RGB dataset like that:</p>
  
  <pre><code>   [[ 255 165 0]
      [255 255 0]
      [0  255 0]]
  </code></pre>
  
  <p>I want to show each row's color,separate 3 PNG images, each 64x64 pixels 
  Is there some method existed in matplotlib or opencv?</p>