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New approach to improve the performance of fringe pattern profilometry using multiple triangular patterns for the measurement of objects in motion

机译:使用多个三角形图案测量运动物体的新方法,可改善条纹图案轮廓测量的性能

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摘要

Fringe pattern profilometry using triangular patterns and intensity ratios is a robust and computationally efficient method in three-dimensional shape measurement technique. However, similar to other multiple-shot techniques, the object must be kept static during the process of measurement, which is a challenging requirement for the case of fast-moving objects. Errors will be introduced if the traditional multiple-shot techniques are used directly in the measurement of a moving object. A new method is proposed to address this issue. First, the movement of the object is measured in real time and described by the rotation matrix and translation vector. Then, the expressions are derived for the fringe patterns under the influence of the two-dimensional movement of the object, based on which the normalized fringe patterns from the object without movement are estimated. Finally, the object is reconstructed using the existing intensity ratio algorithm incorporating the fringe patterns estimated, leading to improved measurement accuracy. The performance of the proposed method is verified by experiments.
机译:在三角形形状测量技术中,使用三角形图案和强度比的条纹图案轮廓测量法是一种鲁棒且计算效率高的方法。但是,类似于其他多次拍摄技术,在测量过程中必须将物体保持静态,这对于快速移动的物体来说是一个挑战性的要求。如果传统的多次拍摄技术直接用于运动物体的测量中,则会引入误差。提出了一种解决该问题的新方法。首先,对象的运动是实时测量的,并由旋转矩阵和平移矢量描述。然后,在对象的二维运动的影响下导出条纹图案的表达式,基于该表达式,估计来自没有运动的对象的归一化条纹图案。最后,使用结合了估计的条纹图案的现有强度比算法重建对象,从而提高测量精度。实验证明了该方法的性能。

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