激光扫描图像编码三维视觉系统误差分析与标定

Error Analysis and Calibration of Laser-Scanning Image-Encoding 3D Vision System

介绍基于激光扫描图像编码方法的三维视觉原理 ,进行误差分析 ,给出系统设计原则 ,提出通过移动标准平面来建立深度数据表的标定方法。这种方法有效地减少了图像采集与处理量 ,测量时间短 ,标定精度高。系统能正确地恢复三维物体的面形 ,其计算机模拟实验的深度测量精度为 0 .5 % ,多次平面实测结果表明 ,系统的平面深度测量精度为 1%。

The principle of a 3D vision system based on laser-scanning image-encoding technology is described. The depth measurement error is analyzed. The design rules of the system are given. The calibrating method of the system, which establishes a standard data table through shafting a standard plane, is put forward. The method can reduce efficiently the images to be captured and processed, have higher precision and make the system operating time be shorter. This system can correctly rebuild the surface of the object to be measured, its depth measurement precision is 0.5% in our computer simulating experiment, the results for many experimental of measuring planes show that the depth measurement precision of this system is 1%.