摘要
针对众多非量测单相机的检校方法,通过分析数码相机的误差来源,并考虑相机的内、外方位元素和物镜光学畸变等因素引起的误差,提出一种基于类似棋盘检校场的数字相机检校方法。利用共线方程和二维DLT之间的关系导出了由二维DLT的9个参数表达的主纵线方程,构建同形矩阵,通过不同摄站拍摄目标的多幅影像,求得内、外方位元素的初始值,并由多张影像的空间后方交会求出相机需要检校参数,再由假设检验来检验相机系统参数的显著性。经实例分析表明,利用改进后的方法求解参数的精度满足实际需求,且效率更高。
For many non‐measured single camera calibration methods ,a method of inclined camera calibration based on chessboard check‐like drill ground is proposed .The method uses the relationship of between collinear equation and the two‐dimensional DTL to deduce the lord ordinate equation including nine parameters of the two‐dimensional DTL by constructing the homomorphism matrix ,and gets the initial value of internal and exterior orientation elements through the different exposure station with shooting more target images .At the last ,the method solves the camera check parameters with many images of the space resection ,and tests the significance of camera system parameters .
出处
《测绘工程》
CSCD
2015年第2期55-59,64,共6页
Engineering of Surveying and Mapping
关键词
内方位元素
外方位元素
畸变参数
同形矩阵
系统参数
inside orientation elements
exterior orientation elements
distortion parameters
isomorphism matrix
system parameter
