基于光栅投影法的3D扫描技术研究

摘要

3D measurement technique is the core of the 3D scanner,and grating projection technique is one of the most promising 3D measurement techniques.In this paper,a simple 3D scanning system was built up with a projector,a camera and a computer.The projector projected grating,and the camera collected the images and transferred them to the computer.After data analysis and processing,the 3D profile of the target object was finally rebuilt by means of the 3D information reconstruction algorithm we proposed.The 3D information reconstruction algorithm took advantage of structured light with Gray coding,and the work principle of the designed 3D scanning system was simple and realizable.The experimental results show that the system is able to quickly and efficiently rebuild the 3D profile of the target object,and has obvious advantages on such technical indexes as scanning speed,resolution,reconstruction speed and accuracy.It is applicable in robot vision,virtual reality and other fields.%光栅投影技术作为3D扫描中最有发展前途的技术之一而备受关注.利用普通的投影仪、照相机和计算机构建了一个简单的3D扫描系统.采用投影仪投射光栅,利用照相机采集图像,输入到计算机中进行处理,采用所提出的三维信息重构算法重建目标物体的三维轮廓.该三维信息重构算法使用格雷码编码的结构光完成信息处理,构建的3D扫描系统工作原理简单,易于实现.实验结果表明,该系统能够快速有效地重建目标物体的三维轮廓,在扫描速度、分辨率以及重建精度与速度等技术指标上优势明显,有利于在机器人视觉和虚拟现实等领域中推广与应用.