摘要
提出一种用于高精度数字图像相关测量的镜头成像畸变估计和校正方法。通过对由刚体平移实验得到的畸变位移场进行分析获得镜头的畸变系数,并根据畸变系数对畸变位移场进行校正。对一25 mm固定焦距镜头的成像畸变进行估计,并进一步讨论了该镜头成像畸变对位移测量误差的影响。结果显示,可有效消除由镜头成像畸变引起的位移测量误差,达到高精度测量的目的。
A simple and effective lens distortion correction technique is presented. By processing the distorted displacement fields of rigid body translation experiment, the lens distortion coefficient is determined. The corrected displacement fields can calculated using the computed distortion coefficient. 1he influence of distortion on displacement measurement error is further discussed. The result shows that the proposed method can effectively eliminate the effect of lens distortion and improve displacement measurement accuracy.
出处
《计量学报》
CSCD
北大核心
2009年第1期62-67,共6页
Acta Metrologica Sinica
基金
国家自然科学基金(10625209,10472050,10121202)
973计划(2004CB619304)
北京市自然科学基金(3072007)
爆炸科学与技术国家重点实验室开放基金(KFJJ05-4)
关键词
计量学
镜头畸变
数字图像相关
位移测量
Metrology
Lens distortion
Digital image correlation
Displacement measurement