Development of an angle measurement system using monocular camera and moiré patterns

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Abstract

This paper describes the development of an angle measurement system using a monocular camera. In recent years, the measurement of the angle of a human joint has played an important role in various fields. Particularly, in the area of rehabilitation, measurement results are applied to make a diagnosis based on the condition of the patient; therefore, high accuracy is required. However, the use of such results is limited because systems with sufficient accuracy are expensive and bulky. In the proposed method, we introduce a Moiré pattern that magnifies small angular displacements to compensate for the poor resolution of the camera. We experimentally verified the robustness of the measurement results’ assuming practical use.

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Tsunoda, J., Sakaino, S., & Tsuji, T. (2019). Development of an angle measurement system using monocular camera and moiré patterns. IEEJ Journal of Industry Applications, 8(2), 200–206. https://doi.org/10.1541/ieejjia.8.200

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