测绘学报
測繪學報
측회학보
Acta Geodaetica et Cartographica Sinica
2015年
9期
988-994,1013
,共8页
空间后方交会%重心坐标%总体最小二乘%绝对定向%倾斜摄影
空間後方交會%重心坐標%總體最小二乘%絕對定嚮%傾斜攝影
공간후방교회%중심좌표%총체최소이승%절대정향%경사섭영
space resection%barycentric coordinates%total least square%absolute orientation%oblique photo-grammetry
为解决基于迭代的空间后方交会算法在倾斜摄影中可能出现的不收敛现象,提出了一种以重心坐标为基准的非迭代解算方法。首先将控制点物方空间坐标描述成重心坐标,并基于其坐标参考无关性,采用总体最小二乘方法求出对应像方空间坐标,然后通过正交矩阵方法进行绝对定向并优化。试验结果表明,该方法几乎对任意影像姿态均能正确解算,并且精度达到甚至优于基于迭代的空间后方交会方法。
為解決基于迭代的空間後方交會算法在傾斜攝影中可能齣現的不收斂現象,提齣瞭一種以重心坐標為基準的非迭代解算方法。首先將控製點物方空間坐標描述成重心坐標,併基于其坐標參攷無關性,採用總體最小二乘方法求齣對應像方空間坐標,然後通過正交矩陣方法進行絕對定嚮併優化。試驗結果錶明,該方法幾乎對任意影像姿態均能正確解算,併且精度達到甚至優于基于迭代的空間後方交會方法。
위해결기우질대적공간후방교회산법재경사섭영중가능출현적불수렴현상,제출료일충이중심좌표위기준적비질대해산방법。수선장공제점물방공간좌표묘술성중심좌표,병기우기좌표삼고무관성,채용총체최소이승방법구출대응상방공간좌표,연후통과정교구진방법진행절대정향병우화。시험결과표명,해방법궤호대임의영상자태균능정학해산,병차정도체도심지우우기우질대적공간후방교회방법。
To resolve the problem that iterative space resection algorithms may have no convergence in oblique photogrammetry,a novel non-iterative method based on barycentric coordinates is proposed.This algorithm firstly describes the object space coordinates of control points as barycentric coordinates,based on its coordinate reference independence,the corresponding image space coordinates can be obtained by using total least square method,then absolute orientation using orthonormal matrices is applied and the result is optimized finally.Experimental results show that this algorithm can be suitable for any image attitude angle,and the accuracy is even better than iterative space resection methods.