The purpose of this study is to realize 3D Image Analysis with Pan/Tilt/Zoom function using SIMI Motion system and to evaluate the accuracy of 3D coordinate data. The results show that in the same Cartesian reference system, the change of the spatial absolute coordinates measured by laser theodolite and 3D image analysis is averaged over 24 points 0.018 m ± 0.003 m, and the relative error of 3D image tracking analysis could be controlled under 1.0%, this accuracy of measurement can meet the need of sport technique analysis. In addition, this study introduces the whole procedure to realize 3D Image Analysis with Pan/Tilt/Zoom function, to analyze the factors influencing the accuracy of measurement, and to suggest what should be done to reduce the measurement error.
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