title: Copy area inside contours to another image
body: <p>I have the following code in Python to find contours in my image:</p>
  
  <pre><code>import cv2
  
  im = cv2.imread('test.jpg')
  imgray = cv2.cvtColor(im, cv2.COLOR_BGR2GRAY)
  ret, thresh = cv2.threshold(imgray, 127, 255, 0)
  im2, contours, hierarchy = cv2.findContours(thresh, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
  </code></pre>
  
  <p>Now I want to copy the area inside the first contour to another image, but I can't find any tutorial or example code that shows how to do that.</p>