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Unified calibration technique and its applications in optical triangular profilometry

机译：统一校准技术及其在光学三角轮廓仪中的应用

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摘要

A unified calibration technique based on ray tracing for optical triangular profilometry is presented. The proposed technique based on the inherent geometric relation between depth and a distorted signal is capable of speedy and accurate measurement without the determination of geometric parameters. The technique can also reduce calibration error caused by the lens distortion of the projector and the camera owing to the reasonable assumption that mapping in a small local area is a linear transformation and the coefficients of the linear transformation may be varied in different local areas. Three classical systems of triangular profilometry, spot inspection, a single-line system, and a projection-grating system, are discussed and demonstrated by experiment.
机译：提出了基于光线跟踪的光学三角轮廓测量的统一校准技术。基于深度和失真信号之间的固有几何关系的所提出的技术能够快速而准确地测量，而无需确定几何参数。由于合理的假设，即在较小局部区域中的映射是线性变换并且线性变换的系数可以在不同局部区域中变化的合理假设，该技术还可以减少由投影仪和照相机的镜头失真引起的校准误差。通过实验讨论了三个经典的三角轮廓测量系统，现场检查，单线系统和投影光栅系统。

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