电影摄影用来分析人体的走步、运动以及举起活动是一种常见的方法。它包括确定人体所需部分的位移轮廓的电影胶片的数字化,从位移曲线作一次导数与二次导数以求其速度与加速度。在使用电影摄影方法中最主要问题是选择合理的采样率,也就是记录人体运动的胶片速率。采样率越高就可能得到越精确的位移数据,可是增加了数字化与数据整理的费用。略为低些的采样率将更为合适些。因此确定 Cinematography is used to analyze the body’s walking, exercise and raise activities is a common method. It consists of digitizing a motion picture film that defines the displacement profile of the desired part of the body, taking the first derivative and the second derivative from the displacement curve for its speed and acceleration. The most important issue in using cinematography is choosing a reasonable sampling rate, which is the rate at which the human body moves the film. The higher the sampling rate, the more accurate displacement data may be obtained, but this increases the cost of digitization and data processing. Slightly lower sampling rate will be more appropriate. So ok