text: #!/usr/bin/env python
  from PIL import Image
  import cv2
  from matplotlib import pyplot as plt
  
  def hazarduous():
      # Select and start Camera.
      DEVICE_NO = 0
      capture = cv2.VideoCapture(DEVICE_NO)
      if not capture:
          print "Failed to open camera number %d" %(DEVICE_NO)
          return False
      template = cv2.imread('images/hazard.png',0)
      w, h = template.shape[::-1]
      while True:
          if cv2.waitKey(100) & 0xFF == ord('q'):       #q to quit
              cv2.destroyAllWindows()
              break
  
          ret, frame = capture.read()
          if ret==False:
              print "Error !"
              return False
          cv2.imshow('Video Capture', frame)
          gray = cv2.cvtColor(frame, cv2.COLOR_BGR2GRAY)
          img=gray
          image = Image.fromarray(gray)
          width, height = image.size
          res = cv2.matchTemplate(img,template,cv2.TM_CCOEFF)
          min_val, max_val, min_loc, max_loc = cv2.minMaxLoc(res)
          top_left = max_loc
          bottom_right = (top_left[0] + w, top_left[1] + h)
          print top_left
          cv2.rectangle(img,top_left, bottom_right, 255, 2)
  
          plt.subplot(121),plt.imshow(res,cmap = 'gray')
          plt.title('Matching Result'), plt.xticks([]), plt.yticks([])
          plt.subplot(122),plt.imshow(img,cmap = 'gray')
          plt.title('Detected Point'), plt.xticks([]), plt.yticks([])
          plt.suptitle("Lesse")
  hazarduous()
  