DEVELOPMENT OF MARKERLESS OPTICAL MOTION CAPTURE FOR LONG JUMP ANALYSIS

• Main Author: Setiadi, Steven
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/52984
• Institution: Institut Teknologi Bandung

Long jump is one of many athletic sports branches where an athlete tries to jump as far as possible in horizontal direction from the jumping line. To produce the best jump result, all movements that happen during the long jump need to be analyzed. To date, movement analysis of the long jump always used markers because its accuracy is guaranteed, but using markers on the subject indirectly hinder the subject’s movement. Furthermore, setting up the markers take time and it doesn’t capture all body segments. Therefore, FTMD ITB’s Biomechanics Research Team developed a motion analysis system for long jump analysis using markerless optical motion capture system, so that the movements of long jump can be replicated without any hindrance to the subject. Development of markerless optical motion capture system is initiated with experiment preparation. This step consists of selecting the location and preparing a camera, a tripod, and a checkerboard pattern. The next step is camera calibration to get the camera parameters, followed by recording movements of long jump. The recording result is then inputted into a software called Matlab to be processed into data that can be used for image processing. Image processing steps used to analyze long jump movements consist of image segmentation, model generation, image registration, and post–processing. Results of data processing then compared to the result of manual segment transformation to obtain the value of correlation coefficient. The data extracted from the images are used for kinematic parameter analysis. Four parameters which are analyzed are center of mass position, take–off angle, jumping distance, and joint angles.