Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you may not be able to execute some actions.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
在图片中有两根相互垂直的线,假如第一次识别到一根,第二次识别时还能识别到第一次的那根吗
需要根据角度判断。或者根据上次的判断的位置或者角度计算。