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openmv识别十字，如果是用直线识别检验两条之间角度为90度来作为判断标准，我打算用openmv识别十字并计数，通过计数来实现小车在规定的第几个十字转弯，如果用直线识别的话是不是不太准确，因为90°会一直跳动，影响计数，问问各位大佬有没有比较好的办法去处理