Fringe projection profilometry is a widely used technique for 3D measurement due to its high accuracy and speed. However, the accuracy significantly decreases when measuring complex texture objects, especially in the junction of different colors. This paper analyzes the causes of errors resulting from complex textures and proposes a height compensation method to revise the error by employing a dual-projector structure. Moreover, the dual-projector is capable of acquiring a pair of errors with opposite signs, which can be utilized to calculate the accurate 3D information after determining the ratio of this pair of errors. Experiments provide significant improvement in measuring complex texture objects, demonstrating the proposed method’s ability.

中文翻译：

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使用双投影仪结构通过高度补偿对复杂纹理物体进行精确 3D 测量

条纹投影轮廓测量由于其高精度和速度而成为广泛使用的 3D 测量技术。然而，在测量复杂纹理物体时，尤其是在不同颜色的交界处，精度会显着下降。本文分析了复杂纹理产生误差的原因，提出了一种采用双投影结构的高度补偿方法来修正误差。此外，双投影机还能够获取一对符号相反的误差，确定这对误差的比例后，可以利用该误差对计算出准确的3D信息。实验在测量复杂纹理对象方面提供了显着的改进，证明了所提出方法的能力。