Abstract
Motion capture application continues to grow in many sectors of the industry, including medical science, sports science, animation, robotics, and many more. In order to capture any specific movement to be analyzed, markers are utilized to identify joint movement. Passive reflective markers are usually utilized in motion capture systems equipped with infrared cameras. Active reflective markers are usually utilized in motion capture systems with digital video recorders. These markers usually transmit or diffuse specular light distribution to be captured by the camera system. In this study, the reflection rate index (RRI) of 4 different types of markers was measured (M1, M2, M3, and M4). Based on the RRI value, the type and level of reflection and light distribution from each marker can be identified. Results indicated that M1 and M2 had RRI values above 1, which means that these markers produced diffuse reflection, whereas M3 and M4 had RRI values below 1, which means that these markers produced specular reflection. Based on this study, we can categorize each markers light distribution or reflection rate based on the calculated RRI. This is helpful to researcher for deciding what type of marker that needs to be utilized in each respective research area.
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Acknowledgments
Thanks are due to the Faculty of Sports Science and Recreation, Universiti Teknologi MARA, Malaysia, for the financial support of this study.
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© 2014 Springer Science+Business Media Singapore
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Ismail, S.I., Adnan, R., Sulaiman, N. (2014). Reflection Rate Index of Markers for Motion Capture Application. In: Adnan, R., Ismail, S., Sulaiman, N. (eds) Proceedings of the International Colloquium on Sports Science, Exercise, Engineering and Technology 2014 (ICoSSEET 2014). Springer, Singapore. https://doi.org/10.1007/978-981-287-107-7_3
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DOI: https://doi.org/10.1007/978-981-287-107-7_3
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