基于折射补偿的水下结构光三维测量系统

针对结构光技术在水下三维测量中的应用,提出了一种基于折射补偿的水下结构光三维测量方法。考虑到水下三维测量时,由于光线在不同介质交界处发生折射,采用平面网格靶标对系统进行陆上标定的结果不能直接应用,必须进行折射补偿,补偿被测物体在CCD摄像机靶面上成像点的像素坐标,按所建立的水下三维测量模型进行测量。通过实验证明,本文的折射补偿方法有效地克服了折射对水下三维测量的影响,实现了水下结构光高精度三维测量。

Underwater 3D structured light system based on refraction compensation

In this paper a new refraction compensation method is presented for the underwater 3D measurement on the basis of a structured light sensor.The parameters of the system calibrated by the planar grid target method become invalid because of the refraction between two different kinds of media.This method can measure the underwater object on the basis of underwater 3D measurement model by correcting the equation of the laser plane and the imaging of object in the CCD after refraction.A measuring system has been designed for the experiments,and the results prove that the method works well with high accuracy.