颜色编码三维测量系统的结构参数设计及仿真

Design and simulation of the structural parameters in a color-encoded 3-D measuring system

提出了基于结构光颜色编码技术的三维测量系统,利用条纹的颜色对光平面的投影角进行编码,以实现三维物体形状测量和重建。该系统主要由数字式光处理器、彩色摄像机和计算机组成,具有结构新颖,简单可靠等特点,且无需扫描,仅需采集一幅景物的编码图案就能得到产生一幅全帧深度图像所需的全部信息,非常适合于高速、实时在线测量。根据系统的主要设计指标及对可测空间的分析,对系统的结构参数进行了优化设计,以保证系统具有最大的可测空间及最佳的遮挡特性。对典型的平面类三维面形——斜面进行了仿真实验,得到系统在 Z 轴(深度方向)、X 轴、Y 轴方向的测量误差分别为 0.31%,0.22%,0.23%,达到了系统的预期要求。

A 3-D measuring system based on structural light color encoding technique is proposed in the paper. In order to realize measurement and reconstruction of 3-D object shape, the encoding for projection angle of light plane is carried out by using fringe color. The system mainly consists of a digital light processor, a colorful camera and a computer. The system is characteristics of novel structure, simplicity, reliability, capable of obtaining the whole information to generate a frame of full depth image only by sampling one object's color-encoded pattern captured by the camera rather than scanning the object. So it is very suitable for real-time and high-speed on-line measurement. According to the analysis of the main design specifications and measurable space of the system, the system's parameters are designed to ensure the maximal measurable space and optimal shelter characteristics. The simulation experiments for typical 3-D profile-inclined plane show that the measuring errors of the system in axis Z (depth direction), axis X and axis Y are 0.31%, 0.22% and 0.23%, respectively, which meet with the prospected demands.