摘要
结合航空摄影光学校准方法和垂线法的概念,提出了一种不依赖于解析模型的相机标定方法,对CCD全像面进行亚像素层级的全视场逐点标定,构建分度视场角-像面坐标映射表;测角过程不依赖于成像模型,而使用映射表标准值插值解算。通过对标定过程进行分析,研究了此方法中影响测角精度的关键参数:一维靶标的靶点直线度、图像处理精度等,获得了系统误差分布特性及测角不确定度。最后通过水平方向测角验证实验,验证了此方法的可行性及误差分析的正确性。
Non-modeled camera calibration method is raised from combination of aerial photography optical laboratory method and vertical method.A mapping table from the indexing view angles to CCD coordinates in sub-pixel level is built.The angle measurement process does not depend on imaging model,but by interpolation calculating using standard values in the mapping table.Then the key parameters affecting the accuracy are researched,including the straightness of the one-dimensional target and image processing accuracy,obtaining the system error distribution characteristics and angle measurement uncertainty.The feasibility of this method is verified by experiment results of horizontal angle measuring.
出处
《传感技术学报》
CAS
CSCD
北大核心
2012年第10期1406-1410,共5页
Chinese Journal of Sensors and Actuators
基金
高等学校博士学科点专项科研基金(20090032110048)
关键词
视觉测量
非模型化相机标定
视场角-像面坐标映射
一维靶标
测角误差
vision measurement
non-model based camera calibration
Angle-Coordinate mapping
one-dimensional target
measuring error
