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This paper describes an easy-to-implement three-dimensional (3-D) real-time shape measurement technique using our newly developed high-speed 3-D vision system.It employs only four projection fringes to realize full-field phase unwrapping in the presence of discontinuous or isolated objects.With our self-design pattern generation board and a modified low-cost DLP projector,the four designed patterns can be switched at high frame rate and can acquire data can captured by a high-speed camera.We detail our proposed shape measurement system and present some results of evaluation experiments.The experimental results have verified its validity and the practicality.