title: Drawing Bounding box around given size Area contour
body: <p>I want to draw a bounding box around each closed contour of an area larger than some threshold, not just the biggest contour. How can I go about doing this?
  So far this is what I have tried:</p>
  
  <pre><code>contours, _ = cv2.findContours(thresh, cv2.RETR_LIST, cv2.CHAIN_APPROX_SIMPLE)
  for c in contours:
      rect = cv2.boundingRect(c)
      if rect[2] &lt; 100 or rect[3] &lt; 100: continue
      print cv2.contourArea(c)
  x,y,w,h = cv2.boundingRect(c)
  cv2.rectangle(im,(x,y),(x+w,y+h),(0,255,0),2)
  cv2.putText(im,'Moth Detected',(x+w+10,y+h),0,0.3,(0,255,0))
  cv2.imshow("Show",im)
  cv2.waitKey()  
  cv2.destroyAllWindows()      
  </code></pre>