Analysis of Swimming Form using Image Processing Technique

我从身体部位的动作上分析了游泳的形式。被试有大学生、初中生、游泳俱乐部的学生和业余爱好者。用电视摄像机拍摄爬泳受试者的水下图像。这些图像被输入到个人电脑中并进行分析。特别是对脚的踢、手臂的拉动、身体的轴线进行了分析。因此，在球员身上，他们的肘关节和手腕的角度并没有突然变化，他们的指尖在一个圆圈附近画了一条轨迹，从他们肩膀下最深的位置经过。在其他受试者中，他们的指尖在前后画出了一个长椭圆形的痕迹。关于身体轴线的运动，戏剧很少垂直运动，保持水平姿势，业余爱好者垂直运动较大，腰部下沉。在踢球方面，球员的踢球速度和膝角是恒定的。其他对象的速度和角度都有很大的变化。这些分析是在DOS环境下进行的。但是，为了清晰地显示图像和有效地打印，我开发了一个新的软件来在Windows 95上运行。该软件可以从图像显示到分析一致地执行。仅通过输入文件名就可以实现图像的红色和写入。它的软件可以像动画一样显示将注意力与线条联系在一起的身体结构。此外，通过顺序选择菜单上的菜单项，将每个关注点的速度和角度拐点以图形的形式显示出来，从现在起，有必要提高该软件的完成度，并研究该软件的形式与推进力之间的关系。

I analyzed the swimming form from the movements of body parts. The subjects were university student playrs, junior high school student playrs, students of swimming club, and amateurs. The underwater images of subjects who swim with crawl stroke were taken pictures with TV camera. These images were input to a personal computer and analyzed. Especially, kick of a foot action, pull of an arm action, an axis of a body were analyzed. As a result, on the playrs, angles of their elbow and their wrist didn't varied suddenly, and their fingertips drew a trace near a circle and passed by the deepest postion just under their shoulders. On other subjects, their fingertips drew a trace of a long ellipse before and behind. Regarding the movements of an axis of a body, plays had few vertical movements and kept horizontal postures, and amaturs had large vertical movements and their waists sank. Regarding the kick, on playrs, their kick speeds and their knee angles were constant. Other subjects had large variations of a speed and an angle.These analyzes went under an environment of DOS.However, for a clear display of images and an effective pressentation, I developed a new software to work on Windows95. The software can consistently execute from a display of image to an analysis. Red and write of the images are possible by only input of a file name. Its software can display, like animation, the body structure that ties attention points with lines. Furthermore, a speed and an angel inflection of every attention points is displayd as a graphy by sequentially choosing items prepared on menus, From now on, it is nesessary to heighten a completion level of this software and investigate a relation between a form and a propulsive power using of this software.