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《Science of Surveying and Mapping》 2009-02
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Computing the exterior orientation elements of array-scanned image by using two-step solution

GONG Hui, JIANG Ting, JIANG Gang-wu,YANG Jing-yu,JI Song(Institute of Surveying and Mapping, Information Engineering University, Zhengzhou 450052,China)  
In computing the exterior orientation elements of array-scanned image, because of the interrelationshi Pof exterior orientation elements, the normal equation is ill-conditioned and the error of least-square estimation is very large. This paper first analyses the previous methods for solving the problem, then puts forward a new method that using two-step solution to compute the exterior orientation elements of array-scanned image. The essential of this new algorithm is to choose a more appropriate regularization matrix than unit matrix. The result of experiment indicates that the arithmetic can effectively overcome the interrelationship among exterior orientation elements and achieve a higher accuracy. The positioning precision can be within one pixel for orientation points and within one and a half pixels for check points.
【Fund】: 国家自然科学基金项目(40571131);; 信息工程大学测绘学院硕士学位论文创新创优基金资助项目
【CateGory Index】: P236
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