基于倾斜摄影的实景三维建模技术实践
2023-08-21韩婷婷赵琳范宪创欧阳亚丽
韩婷婷 赵琳 范宪创 欧阳亚丽



摘 要:随着摄影测量技术的飞速发展,实景三维建模在智慧水利、智慧城市等各个领域得到了广泛应用。凭借其直观、真实、多维度虚拟现实等优势对智慧水利的发展产生了重要影响。文章利用倾斜摄影技术对平寨水库的坝址区进行周期性实景三维建模,下视影像分辨率优于3 cm,可以全方位立体展示工程的建设过程。结果表明:倾斜摄影实景三维模型纹理真实,几何结构完整,具有测绘级量测精度,大大节省了时间和资金成本,为“智慧水利”建设提供了重要支撑。
关键词:智慧水利;实景三维模型;纹理;精度
中图分类号:P231;TP39 文献标识码:A 文章编号:2096-4706(2023)12-0108-04
Practice of Real-Scene 3D Modeling Technology Based on Tilting Photography
—A Case of Pingzhai Reservoir
HAN Tingting1, ZHAO Lin1, FAN Xianchuang2,3, OUYANG Yali4
(1.China Water Resources Beifang Investigation, Design & Research Co., Ltd., Tianjin 300222, China; 2.College of Artificial Intelligence, North China University of Science and Technology, Tangshan 063210, China; 3.Hebei Key Laboratory of Industrial Intelligent Perception, Tangshan 063210, China; 4.Beijing Jingshan School Caofeidian Branch, Tangshan 063209, China)
Abstract: With the rapid development of the photogrammetry technology, real-scene 3D modeling in smart water conservancy, smart city and other fields has been widely used. With its intuitive, real, multi-dimensional virtual reality and other advantages, it has an important impact on the development of smart water conservancy. This paper uses tilting photography technology to product periodic real-scene 3D modeling for the dam site area of Pingzhai Reservoir, and the visual image resolution is better than 3 cm, which can show the construction process of the project in all directions. The results show that the real-scene 3D model of tilting photography has real texture, complete geometric structure and surveying accuracy, which greatly saves time and capital cost. It provides important support for the construction of “smart water conservancy”.
Keywords: smart water conservancy; real-scene 3D model; texture; precision
0 引 言
倾斜摄影技术是一种多视角技术,旨将多台传感器搭載在同一飞行平台上[1,2],经过一次航飞获取五个不同角度的影像,包括下视、后视、前视、左视、右视,垂直地面角度拍摄的影像则为正片,镜头朝向与地面有一定夹角拍摄的影像则为斜片,即前视、后视、左视、右视,通过惯导系统精确定位功能获取影像对应的空间位置和姿态信息,使地面物体信息更为完整准确,传统的倾斜航空摄影,只能获得垂直方向的影像数据,无法获取物体侧面丰富的纹理信息和结构,无法实现三维建模,更无法实现高精度、高质量的需求,倾斜摄影恰好弥补垂直摄影的缺点,可同时获取5个不同角度的影像信息,获取数据的性价比很高,高效低成本,一个中小城市建模工作如果采用……
