:param img: Image to draw on. :param bbox: Bounding box [x, y, w, h] :param l: length of the corner line :param t: thickness of the corner line :param rt: thickness of the rectangle :param colorR: Color of the Rectangle :param colorC: Color of the Corners :return:
(img, bbox, l=30, t=5, rt=1,
colorR=(255, 0, 255), colorC=(0, 255, 0))
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