基于ATP的微地形三维建模方法研究
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摘要
基于人工倾斜摄影测量(artificial tilt photogrammetry,ATP)的方法,通过设置两种拍摄路径、3种拍摄高度、3种分辨率相机的组合,测量并建立微地形地表三维模型,并对其进行精度评价。结果表明,所有三维模型总体平面误差为±8.98 mm,高程误差为±7.79 mm;较"○"形路径、1.0 m和1.5 m测量高度、1 230万和610万像素相机的测量方法而言,"■"形路径、0.5 m测量高度、2 430万像素相机所生成的三维模型平面误差为±4.01 mm,高程误差为±1.81 mm,能够更加精确地表达地表的细节特征,为定量化研究微地形侵蚀地表界面过程提供较高精度的数据支持和三维建模方法参考。
Based on the method of artificial tilt photogrammetry, the 3 D model of micro-topography surface is measured and established by setting up two shooting paths, three shooting heights and three kinds of resolution cameras, and evaluated the model's accuracy. The results show the overall horizontal distance error of the 3 D model is ±8.98 mm and vertical distance error is ±7.79 mm. Comparing with the ○-path, 1.0 m and 1.5 m, 12.3 million and 6.1 million camera resolution, the method which uses ■-path, 0.5 m shooting height, and 24.3 million camera resolution to take photos has better ability to represent the surface micro-topographic features more accurately, and the horizontal distance error of its 3 D models is ±4.01 mm and vertical distance error is ±1.81 mm. It provides sufficiently accurate data and the reference to establishing the 3 D model for quantificational study of micro-topography soil erosion process.
Based on the method of artificial tilt photogrammetry, the 3 D model of micro-topography surface is measured and established by setting up two shooting paths, three shooting heights and three kinds of resolution cameras, and evaluated the model's accuracy. The results show the overall horizontal distance error of the 3 D model is ±8.98 mm and vertical distance error is ±7.79 mm. Comparing with the ○-path, 1.0 m and 1.5 m, 12.3 million and 6.1 million camera resolution, the method which uses ■-path, 0.5 m shooting height, and 24.3 million camera resolution to take photos has better ability to represent the surface micro-topographic features more accurately, and the horizontal distance error of its 3 D models is ±4.01 mm and vertical distance error is ±1.81 mm. It provides sufficiently accurate data and the reference to establishing the 3 D model for quantificational study of micro-topography soil erosion process.
引文
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[9] 庄利有,方德涛,刘珊珊,等.提高非量测相机高程精度关键技术分析[J].测绘通报,2018(7):133-136
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[14] 王丙涛,王继.基于倾斜摄影技术的三维建模生产与质量分析[J].城市勘测,2015(5):80-82