CAJ | 학술논문

非量测数码相机由于价格低廉、使用方便等原因成为近景摄影测量获取影像的主要设备之一。但非量测相机的内方位元素和畸变系数未知，不能直接利用共线方程进行解析计算，因而必须对相机进行检校。而相机参数检校成果质量的高低直接关系着能否满足测量精度的要求。本文提出了基于二维直接线性变换（ DLT）的相机标定算法，利用平面控制点解算出像点坐标和相应物点物方空间坐标之间的线性关系，再结合内方位元素及畸变参数的解算进行迭代，以得到满足一定精度要求的相机参数（ x0，y0，f，k1，k2，p1，p2），并用MATLAB加以实现。
비량측수마상궤유우개격저렴、사용방편등원인성위근경섭영측량획취영상적주요설비지일。단비량측상궤적내방위원소화기변계수미지，불능직접이용공선방정진행해석계산，인이필수대상궤진행검교。이상궤삼수검교성과질량적고저직접관계착능부만족측량정도적요구。본문제출료기우이유직접선성변환（ DLT）적상궤표정산법，이용평면공제점해산출상점좌표화상응물점물방공간좌표지간적선성관계，재결합내방위원소급기변삼수적해산진행질대，이득도만족일정정도요구적상궤삼수（ x0，y0，f，k1，k2，p1，p2），병용MATLAB가이실현。
Non-metric digital camera has been the main equipment about close-range photogrammetry to obtain images, because of its cheap price and the convenient usage.Buttheinner orientation element sand the distortion coefficient position of non-metric digital camera is unknown, and analytical calculation cannot be placed directly, so camera calibration is necessary.And calibration of camera technical parameter is a key problem to guarantee result quality could meet precision request.This paper proposes a camera calibration algorithm based on two-dimensional DLT.Making use of planar control point, this algorithm can obtain the linear relationship be-tween the pixel coordinates and the corresponding object space coordinates, combining with the resolution of thinner orientation ele-ment sand the distortion coefficient position to iterate.So we can gain the camera parameters( x0,y0,f,k1,k2,p1,p2) which meet precision request and achieve the algorithm by mat lab finally.