error: (-215:Assertion failed) p.checkVector(2, CV_32S) >= 0 in function 'fillPoly'
原代码 left_bottom = [0, canny_img.shape[0]]
right_bottom = [canny_img.shape[1], canny_img.shape[0]]
apex = [canny_img.shape[1]/2, 310]
vertices = np.array([left_bottom, right_bottom, apex], dtype=np.int
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