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- 基于特征定位的航空航天制孔多视测量拼接方法
- 作者： 王嘉瑞 崔海华 史建猛 高凯元 国荣辉 来源： 应用光学 年份： 2023 文献类型 ： 期刊 关键词： 特征提取 点云配准 孔检测 三维重建
- 描述： 为满足航空航天大部件对制孔质量的数字化原位检测需求，提出一种基于特征板的制孔多视点云拼接方法，实现孔壁完整三维形貌重建与检测。分析制孔多视检测的需求，提出采用特征定位板辅助的多视点云配准方法。介绍了内角不等四边形特征板的设计与相应的点云分割、识别算法。说明基于特征自定位的多视点云拼接及参数提取方法。结合机械臂搭建实验平台，对常用钛、铝及复合材料的试件模拟原位检测，结果显示各平均误差分别为0.011 mm、0.034 mm、0.041 mm，验证了配准算法的可靠性；并对比传统单视与该方法检测结果，体现该方法的鲁棒性。
- 利用稠密结构特征的航空影像与LiDAR数据配准
- 作者： 黄磊 朱柏 游晋卿 廖永福 葛旭明 来源： 遥感信息 年份： 2023 文献类型 ： 期刊 关键词： S CFOG LiDAR 配准 航空影像 稠密结构特征 几何约束
- 描述： ，实现对这两类数据的精配准。通过两组不同覆盖场景的数据进行实验，结果表明，该方法可达到1～2个像素的配准精度。
- 一种航空影像的三维重建全局优化方法
- 作者： 杨阿华 张强 杨阿锋 常鑫 来源： 测绘科学 年份： 2023 文献类型 ： 期刊 关键词： 全局优化 SBA 共面约束 光束法平差 三维重建
- 描述： 针对大规模航空影像三维重建全局优化的存储开销大、无法整体求解的问题,提出了一种改进的全局优化方法。该方法基于同名点对应的同名光线与基线共面这一约束,以相机参数为未知量,由影像间的同名点建立约束方程组
- Characterization of the Fels Landslide (Alaska) Using Combined Terrestrial, Aerial, and Satellite Remote Sensing Data
- 作者： Davide Donati Doug Stead Bernhard Rabus Jeanine Engelbrecht John J. Clague Stephen D. Newman Mirko Francioni 来源： Remote Sensing 年份： 2023 文献类型 ： 期刊 关键词： Motion multisensor SAR Analysis LiDAR displacement from landslide monitoring characterization structure
- 描述： The characterization of landslides located in remote areas poses significant challenges due to the costs of reaching the sites and the lack of reliable subsurface data to constrain geological interpretations. In this paper, the advantages of combining field and remote sensing techniques to investigate the deformation and stability of rock slopes are demonstrated. The characterization of the Fels landslide, a large, slowly deforming rock slope in central Alaska, is described. Historical aerial imagery is used to highlight the relationship between glacier retreat and developing instability. Airborne laser scanning (ALS) and Structure-from-Motion (SfM) datasets are used to investigate the structural geological setting of the landslide, revealing a good agreement between structural discontinuities at the outcrop and slope scales. The magnitude, plunge, and direction of slope surface displacements and their changes over time are studied using a multi-temporal synthetic aperture radar speckle-tracking (SAR ST) dataset. The analyses show an increase in displacement rates (i.e., an acceleration of the movement) between 2010 and 2020. Significant spatial variations of displacement direction and plunge are noted and correlated with the morphology of the failure surface reconstructed using the vector inclination method (VIM). In particular, steeper displacement vectors were reconstructed in the upper slope, compared to the central part, thus suggesting a change in basal surface morphology, which is largely controlled by rock mass foliation. Through this analytical approach, the Fels landslide is shown to be a slow-moving, compound rockslide, the displacement of which is controlled by structural geological features and promoted by glacier retreat.