用构造光系统实现3-D形貌测量的研究

介绍了一个用构造空间二进制编码进行非接触３Ｄ形貌测量的系统。它以一台ＬＣＤ投影仪为硬件基础，用８幅条纹投影图案对被测物体表面进行空间编码。用ＣＣＤ摄像机获取物体编码信息，用基于单一像素的三角法原理从摄像机图像中获取三维形貌数据。指出了二进制编码图案生成软件及其生成的条纹图案的特点。为了提高３Ｄ形貌测量的精度，分析了由摄像机和投影仪镜头造成的误差，建立了它们的透镜误差矫正公式，并取得了良好的实验结果。

Study on Accurate 3-D Range Image Measurement Using a Structured Light System

This paper introduces a non contact 3 D range image measurement system using a structured light system. By means of a LCD projector, eight stripe patterns encoded the measured space into 253 sections. A CCD camera sequentially recorded eight gray images corresponding to the eight patterns, respectively. The range data of the object surface is demodulated using the pixel based triangulation. This paper also introduces a software to produce highly efficient binary spatial coding patterns. The error caused by projector lens distortion and camera lens distortion are analyzed, and the error formulae to rectify the error of radial lens distortion is set up in order to obtain a good measured resolution. As a pixel based evaluation method, range data being got from only a single pixel, it can be used in measuring sharply discontinuous surfaces, and works smoothly in a less structured environment.