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前言在对体育各项目的运动技术作定量分析时,角度的计算是相当重要的。它对进一步计算运动速度、加速度、确定重心的位置等都起着关键性的作用。因此,快速、准确地确定运动人体的各关节角和一些有关角度是很有价值的。过去,我们一般是从垂直摄影所得到的技术照片上直接测量,由于人们的视差和一些其它因素,此法的误差往往很大,不能满足定量分析力求精确的要求。
Foreword In the quantitative analysis of sports techniques in sports, the calculation of angles is quite important. It plays a key role in further calculating velocity, acceleration, and determining the location of the center of gravity. Therefore, it is valuable to quickly and accurately determine the joint angles and some related angles of the moving body. In the past, we usually measured directly from the technical photos obtained by vertical photography. Due to the disparity of people and some other factors, the error of this method is often too large to meet the precise requirements of quantitative analysis.