基于复杂阴影测量方法的建筑物高度反演

doi:10.6046/zrzyyg.2023121

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摘要

阴影法能以较低的成本测量大范围的城市建筑物高度,但其中的阴影长度测量方法在复杂阴影场景中存在测量效率低、精度差、鲁棒性低等问题。对此,该文提出了一种复杂建筑阴影测量方法。该方法首先通过渔网法和多种约束条件相结合实现对阴影的测量与划分; 其次,统计所有划分区域的阴影长度值,利用四分位法和双向逼近策略确定阴影最优值; 然后,综合评估所有区域最优值确定阴影长度; 最后,利用立体交会的建筑高度对应用该阴影测量方法计算的建筑物高度进行验证。结果表明: 该方法计算建筑物高度有90.6%以上绝对误差在0~5 m之间。因此可以得出该文方法计算的阴影长度有着较高的精度,能够满足不同种类的复杂阴影测量,提高了阴影法反演建筑物高度的精度,为城市建筑物高度的反演提供新的技术支撑。

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	李志新
	纪松
	范大昭
	高定
	李永建
	王刃

关键词 ：渔网法, 分区统计, 四分位法剔除粗差, 双向逼近策略, 最优值评估

Abstract：

Building heights are necessary for urban informatics, providing a significant basis for the planning and early warning of risks for urban construction. The shadow method, which can measure the heights of urban buildings on a large scale at a low cost, faces challenges such as low efficiency, accuracy, and robustness in building height inversion in complex shadow scenes. This study proposed a measurement method for these scenes. First, the shadows were measured and delineated using the fishing net method combined with multiple constraints. Second, the shadow lengths of all the zones divided were obtained, and the optimal values were determined using the quartile method and the bidirectional approximation strategy. Third, the shadow lengths were determined through a comprehensive assessment of the optimal values of all zones. The results show that 90.6% of building heights calculated using the new method exhibited absolute errors ranging from 0 to 5 m. Therefore, this method features elevated accuracy of building height inversion for various complex shadow scenes, laying a basis for research into the inversion and expansion of urban building heights.

Key words： fishing net method zonal statistics quartile method to eliminate gross error bidirectional approximation strategy optimal value evaluation

收稿日期: 2023-05-09 出版日期: 2024-09-03

ZTFLH:

TP79

基金资助:国家自然科学基金项目“高分辨率卫星影像协同处理与定位能力星间传递技术研究”(41971427);嵩山实验室项目“空间智能融合感知技术及精密重建系统”(221100211000-5);国防科工局项目“高分遥感测绘应用示范系统(二期)”(42-Y30B04-9001-19/21)

通讯作者: 纪松(1983-),男,博士,副教授,博士生导师,主要从事航天摄影测量以及遥感影像处理与分析方面的研究。Email: jisong_chxy@163.com。

作者简介: 李志新(1997-),男,硕士研究生,主要从事数字摄影测量研究。Email: 1294622314@qq.com。

引用本文:

李志新, 纪松, 范大昭, 高定, 李永建, 王刃. 基于复杂阴影测量方法的建筑物高度反演[J]. 自然资源遥感, 2024, 36(3): 108-116.
LI Zhixin, JI Song, FAN Dazhao, GAO Ding, LI Yongjian, WANG Ren. Building height inversion based on the complex shadow measurement method. Remote Sensing for Natural Resources, 2024, 36(3): 108-116.

链接本文:

https://www.gtzyyg.com/CN/10.6046/zrzyyg.2023121 或 https://www.gtzyyg.com/CN/Y2024/V36/I3/108

Fig.1 建筑物阴影测量技术路线

Fig.2-1 建筑物阴影场景

Fig.2-2 建筑物阴影场景

Fig.3 分区测量示意图

Fig.4 确定最优值

Fig.5 最优值评估技术路线

Fig.6 研究区可视化图

Fig.7 建筑物与阴影几何关系示意图

Fig.8 分区测量结果

Tab.1 测量误差统计

Fig.9 不同阴影场景建筑物高度估算误差

Tab.2 建筑物高度误差统计

Fig.10 建筑物高度误差统计

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[1]	李志新, 王梦飞, 贾伟洁, 纪松, 王宇飞. 一种结合阴影信息的建筑物层数识别方法[J]. 自然资源遥感, 2023, 35(3): 97-106.

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