Juarez-Salazar Rigoberto, Rios-Orellana Obed I, Diaz-Ramirez Victor H
Appl Opt. 2022 Jul 20;61(21):6097-6109. doi: 10.1364/AO.461168.
Fringe projection profilometry requires calibrating both cameras and projectors for metric measurements. Cameras are relatively simple to calibrate, but projectors require more sophisticated procedures. In this paper, a fringe projection profilometer with two calibrated cameras and one uncalibrated projector is developed for metric measurements. A phase rectification method, which is crucial for stereo matching, is designed by minimizing the perspective distortion. Also, a simple method for point matching using stereo rectified phase maps is proposed. The principles of metric profilometry using the proposed rectification method are introduced. The developed system is evaluated experimentally by the metric measurement of three-dimensional objects. The obtained results confirm a high accuracy of metric measurement and versatility in the design of fringe projection profilometers with uncalibrated projectors.
条纹投影轮廓术需要对相机和投影仪进行校准，以便进行尺寸测量。相机校准相对简单，但投影仪需要更复杂的程序。本文开发了一种用于尺寸测量的条纹投影轮廓仪，它配备两个已校准的相机和一个未校准的投影仪。通过最小化透视畸变设计了一种对立体匹配至关重要的相位校正方法。此外，还提出了一种使用立体校正相位图进行点匹配的简单方法。介绍了使用所提出的校正方法进行尺寸轮廓测量的原理。通过对三维物体的尺寸测量对所开发的系统进行了实验评估。获得的结果证实了尺寸测量的高精度以及在未校准投影仪的条纹投影轮廓仪设计中的通用性。
