Kaoru Takizawa

Flow of rhythmical movement in a snapshot of anaglyph stereo image

アナグリフ立体画像のリズミカルで全身的な動きの教育への応用として、動きの再現性の面から、2次元画像との比較によって調査した。その結果、体操を授業で経験した段階の者にとっては、アナグリフ立体画像の方が2次元画像より、見やすいと感じていることがわかった。画像は奥行きがあり、動きの前後・上下関係がわかりやすいという意見が多かった。運動としては、からだのねじれ、はずみ、ジャンプの高さ、振りとして現われる。また、体操専門家は、2次元画像を通して3次元像を想像する能力を身につけているので、動きの理解には特に立体画像が必要という声はなかった。しかしより詳細に動きを理解しようとする際に、有効であるといえる。今後、このような比較を通して、どこに視点を当てて動きを見ているかを探ることが可能と考えられる。

Differences between Impressions of Anaglyph Stereo Images and 2D Images

In rhythmical gymnastics, movement should flow from the center of the body to peripheral parts of the body. VTR, DVD and photographs are used to teach the movements. The purpose of this study is to compare the impressions of anaglyph stereo images and 2D images using a questionnaire. The stretching and stability of a hard to understand movement was better perceived via anaglyph stereo image. For simple movements, anaglyph stereo images revealed dynamics more effectively than 2D images, but were less effective at revealing relaxing. This suggests that anaglyph stereo images are effective tools for analyzing movement in rhythmical gymnastics.

Dynamic Performance and Analysis of Moving Human Body

A visual digital recorder system (DVR) is widely used to visualize and analyze the dynamic image of moving body. The simultaneous instrumentation system of the DVR and infrared radiometer (IR) was applied to study two-dimensional moving images of the human body under walking and Gymnastic training. Dynamic behaviors of human body segments like location velocity and force are measured and analyzed by DVR, IR and the personal computer. Single-and multi-flash imaging methods of the human body were visualized and evaluated by using the multi flash motion recorder. Lastly, a fluctuation performance of the moving human body was quantitatively obtained and expressed in form of frequency, power spectrum density and coherence coefficient

Simultaneous visualization study on dynamic motion and temperature in moving bodies by means of infrared radiometer

In the field of dynamic engineering and biomechanics, the digital video recorder (DVR) is widely applied to visualize two- and three-dimensional images of moving machineries and human beings using several visual markers on the body surface. On the other hand, high-speed infrared radiometers (IR) are often used to visualize and analyze the dynamic image of moving body as well as their temperature distributions. IR radiometric systems are mainly applied to detect external and internal flaws of dynamic components and etiological causes of human beings in the field of industry and medicine, as remote-sensing non-destructive and diagnostic methods. Simultaneous visual studies of dynamic motion and temperature distribution of the moving body are very little to apply industrial and biological engineering systems. Quantitative analysis using the high-speed IR system was carried out to visualize and motion and thermal images of the moving bodies simultaneously. In this study, the high-speed IR system measures the dynamic and thermal images of the moving bodies using passive and artificial thermal markers and friction marks of the moving interface boundary. Dynamic motion characteristics of measured images by digital video recorder DVR and IR were quantitatively compared. Characteristics of single- and multi-flash imaging methods were measured and analyzed using the triggered motion coder. The IR radiometric systems are quite useful in the visualization and analysis of the motion and thermal distribution of the moving mechanical components, human bodies and their supporting components. These characteristics are well related to motion physiology, human welfare, health management etc.

Simultaneous Visualization of Moving Human Body by Means of DVR and Infrared Radiometer

Digital Video Recorder is widely used to visualize the dynamic image of moving body. In the field of motion science, DVR is often applied to study two and three-dimensional moving images of the human body under walking, running and jumping by means of several tracer markers on the body surface. In this study, the high-speed infrared radiometer IR simultaneously visualized the visual and thermal image of the moving human body using thermal marker and thermal footmarks. Characteristics of single- and multi-flash imaging methods were evaluated using the dynamic motion recorder.