摘要
针对大型工件的复杂曲面难以精确测量,国外的商用摄影测量软件占据垄断地位。在国内率先开发了近景工业摄影测量系统XJTUDP,介绍了系统的组成、开发内容,研究了基于亚像素边缘拟合的高精度标志点中心检测方法、编码点设计及编码点自动检测方法。重点研究了基于摄影测量的相机标定和三维重建技术,包括共线方程、基于共面方程的像片定向、直接线性变换解法、外极线几何约束和光束平差解法。参照VDI/VDE2634测试方案,以自行设计的立方体框架为对象,对XJTUDP系统和TRITOP系统进行了测试,得出两者精度均小于0.1mm/m的结论,证明开发的系统完全可以应用在工业测量领域。
Since it is difficult to measure the complex surfaces of large scale products precisely, the market had been occupied by foreign commercial measuring software for long times. The close range industry photogrammetry system, namely XJTUDP, has been developed successfully at home firstly. Composing and explored contents of this system were introduced. The high accuracy center measuring method of marked points technique based on the fitting sub-pixel edge, and the methods of coded points designing and coded points auto-detecting were investigated.The camera calibration techniques based on photogrammetry and 3D reconstruction techniques were studied emphatically, including co-linear equation, image orientation based on eoplanarity equation, direct linear transformation solution, the outer polar geometric constraints and bundle adjustment solution. Both XJTUDP system and TRITOP system were tested individually by taking VDINDE2634 testing program as reference project and taking self-designed framework of cube as tested target. It is concluded that their precision was less than 0.1 mm/m, which proves that photogrammetry system explored by ourself is applied in field of industrial measuring successfully.
出处
《光电工程》
CAS
CSCD
北大核心
2009年第5期122-128,共7页
Opto-Electronic Engineering
基金
国家863计划(2007AA04Z124)
江苏省科技支撑计划(工业部分)BE2008058
关键词
摄影测量
标定
亚像素
编码点
photogrammetry
calibration
sub-pixel
coded point
