摘要
非量测数码相机凭借其自身特有的优点,成为了摄影测量获取影像的主要设备之一,广泛应用于摄影测量中。由于其内方位元素和畸变参数未知,本文介绍了一种利用测角法进行几何标定的方法,通过测定平行光线的入射角度和其对应像片上的像点坐标,根据镜头畸变平方和最小的原则解算出内方位元素和畸变参数。研究表明该方法对主距、主点的标定精度可达到μm级,该方法用于非量测型数码相机的几何参数标定是完全可行的。
By right of its unique advantages, non-metric digital camera has become one of the main equipments for image acquisition in photogrammetrie measurement. In the paper, through measuring the incident angel of parallel light and its image point coordinates, a geometric calibration method using angle measure was proposed to calculate the inner orientation elements and the distortion parameters according to the minimum principle of lens distortion square sum. The calibration precision of principle distance and principal point could reach micron-grade. The results showed that the method would be feasible to be used in geometric calibration for non-metric digital camera.
出处
《测绘科学》
CSCD
北大核心
2014年第6期99-103,共5页
Science of Surveying and Mapping
基金
中国测绘科学研究院基本科研业务费(7771313)
关键词
非量测数码相机
测角法
几何标定
内方位元素
畸变参数
non-metric digital camera
angle measure
geometric calibration
inner orientationelements
distortion parameters
