光栅投影式三维轮廓测量的图像滤波算法.doc

文档介绍：光栅投影式三维轮廓测量的图像滤波算法作者简介:刘永超(1988-),男,硕士研究生,电子科学与技术
基金项目:中央高校基本科研业务费专项资金(2009CZ07)与安全生产智能监控北京市重点实验室主任基金资助课题。
通信联系人:王拥军(1968 - ),男(汉),副教授,博士,研究方向:全光信号处理及光传感技术. E-mail:wangyj1284@
刘永超1,2,王拥军1,2,秦恒1,2,张晓磊1,2,张靖涛1,2
( 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)
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。D)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。
关键词:光栅投影;三维测量;正弦编码失真;图像滤波
中图分类号:TP391 文献标志码:A
The algorithm of image filtering in grating projection based on three-dimensional measurement
Liu yongchao1,2, Wang yongjun1,2, Qin heng1,2, Zhang xiaolei1,2, Zhang jingtao1,2
( 1. School of Electronic Engineering, State Laboratory of Information Photonics and munication, Beijing University of Posts and munications, Beijing 100876, China;
2. Beijing Key Laboratory of Work Safety Intelligent Monitoring, Beijing University of Posts and munications, Beijing 100876, China)
Abstract: 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 n