基于单数码相机的三维曲线结构摄影测量  

Measurement of 3D Curve Structures by Using One Hand-held Digital Camera

作　　者：丁志安[1] 张丽艳[1] 郑建冬[1] 张维中[1] 

机构地区：[1]南京航空航天大学,南京210016

出　　处：《中国机械工程》2008年第7期819-823,共5页China Mechanical Engineering

基　　金：国家自然科学基金资助项目(50475041);江苏省自然科学基金资助项目(BK2006192)

摘　　要：提出一个三维测量与模型重建的新方法。该方法通过对被测物体的特征线和进行模型重建所需要的模型表面的某些控制线进行标记,使其在颜色亮度上明显区别于被测物体本身的颜色,以利于图像识别;然后以一个数码相机为主要工具,以自由拍摄方式获得被测物体的多帧图像,在精确计算各次拍摄时的相机位置与姿态的基础上,通过对标识曲线的提取和不同图像中同名曲线的优化匹配,获取特征线和控制线的三维信息,进而重建被测物体的三维数字化模型。该方法具有测量硬件简单、测量方式灵活、测量范围不受限制、各角度测量数据自动拼合等优势,在逆向工程、产品质量检测等领域有广泛的应用前景。A new method for 3D measurement and model reconstruction was introduced. First, we marked the interested curve structures on the object to make them visually outstand from the background. Then multi-images of the object were taken by using a digital camera. The images partially overlaped each other. A semi-automatic method was put forward to extract the marked curves on the images. After automatically recover the camera poses, the curve correspondences on stereo image pairs were optimally established. Finally, the 3D curves structures were recovered by using the stereo triangulation method. The proposed method has the following advantages： （1） the hardware used for the measurement is quite simple; （2） the measuring process is very convenient and flexible; （3） no registration is needed for the digitized data obtained from different views; and （4） there is no redundancy in the digitized data for model reconstruction. The method can be widely used in reverse engineering and quality inspection.

关 键 词：三维测量 模型重建 图像匹配 三角测量法 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]