call gate meaning in English

调用门
呼叫门

The second part of this paper deals with motion analysis which is called sfm ( structure from motion ) problem , that is , recovering the structure and motion of the object , two types of sfm algorithm are introduced - feature based and optical flow based . simulations for time to collision are done on image sequences formed by visible light and infrared image sequences . a new method called gate - average method based on the approach supposed by subbarao for the estimation of time to collision is presented
论文的第二部分讨论了红外图象序列的运动分析，介绍了两类运动分析的方法- - -基于特征的方法和基于光流的方法，并对可见光图象序列和红外图象序列的碰撞时间进行了仿真，并根据subbarao的方法，提出了对碰撞时间进行门限均值处理的方法。