old_contents: #!/usr/bin/env python
  
  '''
  MSER detector demo
  ==================
  
  Usage:
  ------
      mser.py [<video source>]
  
  Keys:
  -----
      ESC   - exit
  
  '''
  
  import numpy as np
  import cv2
  import video
  
  if __name__ == '__main__':
      import sys
      try:
          video_src = sys.argv[1]
      except:
          video_src = 0
  
      cam = video.create_capture(video_src)
      mser = cv2.MSER_create()
      while True:
          ret, img = cam.read()
          gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
          vis = img.copy()
  
          regions = mser.detectRegions(gray, None)
          hulls = [cv2.convexHull(p.reshape(-1, 1, 2)) for p in regions]
          cv2.polylines(vis, hulls, 1, (0, 255, 0))
  
          cv2.imshow('img', vis)
          if 0xFF & cv2.waitKey(5) == 27:
              break
      cv2.destroyAllWindows()
  
new_contents: #!/usr/bin/env python
  
  '''
  MSER detector demo
  ==================
  
  Usage:
  ------
      mser.py [<video source>]
  
  Keys:
  -----
      ESC   - exit
  
  '''
  
  import numpy as np
  import cv2
  import video
  import sys
  
  if __name__ == '__main__':
      try:
          video_src = sys.argv[1]
      except:
          video_src = 0
  
      cam = video.create_capture(video_src)
      mser = cv2.MSER_create()
  
      while True:
          ret, img = cam.read()
          if ret == 0:
              break
          gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
          vis = img.copy()
  
          regions, _ = mser.detectRegions(gray)
          hulls = [cv2.convexHull(p.reshape(-1, 1, 2)) for p in regions]
          cv2.polylines(vis, hulls, 1, (0, 255, 0))
  
          cv2.imshow('img', vis)
          if 0xFF & cv2.waitKey(5) == 27:
              break
      cv2.destroyAllWindows()
  
subject: Update MSER python sample