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This paper proposes an optimized method of three-dimensional measurement based on three measuring triangles. The three measuring triangles are made up of the left camera, the right camera, the projector and the object to be measured. After projecting N binary band limited patterns on the surface of the object to be measured, the object can be divided into three parts to be measured using the temporal correlation based on Hamming distance. The three parts of the measuring data complement each other without overlapping each other and thus changing the useless data measured in original binocular measurement system into effective data. In this way, the missing data of binocular measurement system is made up and the integrity of the measurement results are improved. The experimental results verify that the integrity of the reconstructed point cloud using the three measuring triangles method is higher than that of the original binocular 3D measurement method, which proves that the proposed optimized method is a convenient solution for solving the problem of partial point cloud missing in the binocular structure measurement.
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