光栅投影式三维轮廓测量的图像滤波算法  

The algorithm of image filtering in grating projection based on three-dimensional measurement

作　　者：刘永超[1,2] 王拥军[1,2] 秦恒[1,2] 张晓磊[1,2] 张靖涛[1,2] 

机构地区：[1]北京邮电大学电子工程学院光通信与信息光子学国家重点实验室,北京100876 [2]北京邮电大学安全生产智能监控北京市重点实验室,北京100876

出　　处：《软件》2012年第11期186-189,共4页Software

基　　金：中央高校基本科研业务费专项资金(2009CZ07);安全生产智能监控北京市重点实验室主任基金资助课题

摘　　要：基于光栅投影的三维测量技术,在读取采用正弦编码的光栅图样时,其图像灰度分布应为正弦分布。但由于投影环境的干扰和电荷耦合元件(CCD)的数字采样失真,在编码图样的灰度分布中会存在大量噪声,这将导致在相位恢复时产生误差。本文提出了一种频域滤波优化算法可以解决上述问题,通过仿真和实验证明,该算法明显的提升了光栅投影式三维测量技术的实用性。For the grating projection based on three-dimensional measurement, a sinusoidal grayscale distribution of image should be got with sinusoidal encoding. However, due to the interference of the environment and the sampling distortion of charge-coupled device （CCD）, a lot of noise will be existed in the grayscale distribution of the encoded image, and the phase recovery error will occurred by the influence of noise. A frequency domain filtering optimization algorithm was proposed to solve the problems above, then the simulations and experiments shown that the practicality of the grating projection based three-dimensional measurement had be significantly improved by this algorithm.

关 键 词：光栅投影 三维测量 正弦编码失真 图像滤波 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]