namedWindow('Image', CV_WINDOW_NORMAL | CV_WINDOW_KEEPRATIO | CV_GUI_EXPANDED)
threshold(imgrey, imgrey, 100, 255, 0)
findContours(imgrey, imContours, hierarchy, CV_RETR_TREE,
    CV_CHAIN_APPROX_SIMPLE, Point(0, 0))
Обнаружение формы звезды в opencv-python