OpenCV Python version of contours
Traceback (most recent call last):
  File "./contours.py", line 70, in <module>
    cv.cvPoint (0,0))
  File "/usr/lib/python2.5/site-packages/opencv/cv.py", line 146, in cvFindContours
    count, seq = cvFindContoursUntyped( *args )
  File "/usr/lib/python2.5/site-packages/opencv/cv.py", line 6351, in cvFindContoursUntyped
    return _cv.cvFindContoursUntyped(*args)
RuntimeError:  openCV Error:
        Status=Unsupported format or combination of formats
        function name=cvStartFindContours
        error message=[Start]FindContours support only 8uC1 images
        file_name=cvcontours.cpp
        line=214