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opencv/samples/python$ python camshift.py
Keys:
    ESC - quit the program
    b - switch to/from backprojection view
To initialize tracking, drag across the object with the mouse

Traceback (most recent call last):
  File "camshift.py", line 115, in <module>
    demo.run()
  File "camshift.py", line 105, in run
    cv.ShowImage( "Histogram", self.hue_histogram_as_image(hist))
  File "camshift.py", line 39, in hue_histogram_as_image
    val = int(mybins[int(hdims * x / w)] * h / 255)
OverflowError: cannot convert float infinity to integer