无人机影像数字处理及在地震灾区重建中的应用

Digital Processing of Unmanned Aerial Vehicle Image and Its Application in Reconstruction of Wenchuan Earthquake-Hit Areas

为解决多云雾地区卫星遥感数据难以实时获取的问题,考虑到无人机低空遥感影像分辨率高、灵活性好等特点,探讨了无人机影像的获取及数字处理方法.探讨了影像三维可视化过程,并针对汶川地震灾区重建规划设计的需要,将重建规划设计模型直接引入三维地理信息系统环境.实验结果表明:与卫星遥感数据相比,无人机获取的影像在三维可视化中能提供更详细、更丰富的几何和语义信息;采用设计模型与三维地形景观相结合的技术,能实时再现设计成果,避免复杂环境下二维图形带来的思维局限性和片面性,提高设计效果的真实表现力.

In order to solve the difficulty in real-time acquisition of remote sensing data in multi-cloud regions,acquisition and digital processing methods of UAV（unmanned aerial vehicle） remote sensing images were discussed on the basis of the characteristics of high image resolution and good flexibility of low-altitude UAV remote sensing,and a three-dimensional image visualization process was discussed.For the reconstruction planning and design needs of Wenchuan earthquake-hit areas,the model designed for the reconstruction was introduced into the environment of a three-dimension geographic information system directly.The experimental results show that compared with satellite remote sensing data,UAV remote sensing images can provide rich geometric and semantic information in three-dimensional visualization.Combination of a design model and three-dimensional terrain scene can reproduce the design results in real-time,avoid the limitation and one-sidedness of the thinking brought about by two-dimensional graphics in a complex environment,and improve the true expression of design effects.