| 基于改进DLT算法的数字近景摄影测量 |
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| 引用本文： | 王德咏,葛修润,罗先启,李宏阶.基于改进DLT算法的数字近景摄影测量[J].上海交通大学学报,2011(Z1). |
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| 作者姓名： | 王德咏 葛修润 罗先启 李宏阶 |
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| 作者单位： | 上海交通大学船舶海洋与建筑工程学院;上海交通大学海洋工程国家重点实验室;湖北煤炭地质一二五队; |
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| 基金项目： | 上海交通大学海洋工程国家重点实验室专项基金项目(GP010817); 上海市人才引进基金项目(077) |
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| 摘 要： | 直接线性变换方法(DLT)无需内、外方位元素的初始近似值,故广泛应用于非量测相机的近景摄影测量数据处理.然而直接线性变换系数l的求解主要是依据控制点,当控制点精度较低、数量较少时,会致使结果精度较低或无法应用.基于经典的DLT算法,提出合理的假设及推论,建立相应的非线性规划优化模型.对经典DLT算法加以改进,并通过隧道数值试验加以验证,取得了较好的效果.
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| 关 键 词： | 非测量相机 直接线性变换算法 近景摄影测量 隧道变形 |
Study on Digital Close-range Photogrammetry Based on Improved DLT Algorithm |
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| WANG De-yonga,b,GE Xiu-runa,LUO Xian-qia,LI Hong-jie.Study on Digital Close-range Photogrammetry Based on Improved DLT Algorithm[J].Journal of Shanghai Jiaotong University,2011(Z1). |
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| Authors: | WANG De-yonga b GE Xiu-runa LUO Xian-qia LI Hong-jie |
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| Institution: | WANG De-yong1a,b,GE Xiu-run1a,LUO Xian-qi1a,LI Hong-jie2(1a.School of Naval Architecture,Ocean and Civil Engineering,1b.State Key Laboratory ofOcean Engineering,Shanghai Jiaotong University,Shanghai 200240,China,2.The No.125 Coal Exploration Team,Hubei Yichang 443002,China) |
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| Abstract: | Direct linear transformation(DLT) method is extensively applied to Close-range Photogrammetry technology because that it does not need initial approximation of inner and exterior orientation elements.But it is hard to acquire the high accuracy when there are no enough control points or when the accuracy of control points is very low.So advisable assumptions and deductions were proposed based on DLT method,and an optimum nonlinear programming model was built.Beside,the improved algorithm was applied in numer... |
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| Keywords: | non-metric digital camera direct line transformation(DLT) algorithm close-range photogrammetry deformation of tunnel |
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