Analysis of Swimming Form using Image Processing Technique

利用图像处理技术分析游泳形态

• 批准号: 07680140
• 负责人: MOROZUMI Tatsuru
• 金额: $ 1.28万
• 依托单位: Takushoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07680140/
• 关键词: exercise analysis; swimming form; crawl stroke; kick; pull; image processing; computer analysis; windous application; 映像解析; コンピュータ解析

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.

我从身体各部分的动作来分析游泳的形式。研究对象为大学生运动员、国中生运动员、游泳社学生及业余运动员。用电视摄像机拍摄自由泳受试者的水下图像。将这些图像输入到个人计算机中并进行分析。特别是，脚的踢动作，手臂的拉动作，身体的轴进行了分析。因此，在运动员身上，肘部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，并通过了肩膀下方的最深处。在其他科目上，他们的指尖在前后画了一个长长的椭圆形。关于身体轴的运动，戏剧几乎没有垂直运动，保持水平姿势，而阿马图尔的垂直运动很大，腰部下沉。关于踢球，在运动员身上，他们的踢球速度和膝盖角度是恒定的。这些分析都是在DOS环境下进行的，但是为了使图像显示清晰，印刷效果好，我开发了一个新的软件，可以在Windows95上工作。该软件可以始终如一地执行从图像显示到分析。只需输入文件名即可红色和写入图像。它的软件可以像动画一样显示身体结构，将注意力点与线条联系起来。此外，通过顺序地选择菜单上准备的项目，将每个关注点的速度和角度变化显示为图形。从现在起，有必要提高该软件的完成水平，并研究使用该软件的形式和推进功率之间的关系。