基于高分辨率卫星影像阴影的建筑物高度反演研究

Research of building height inversion based on high-resolution satellite images shadow

随着遥感技术的飞速发展,目前可用于震害快速评估、灾害调查以及建筑物信息提取的高分辨率遥感资料越来越多。利用阴影进行建筑物高度反演的研究取得一定的进展,但所得的公式简单,研究对象理想。在前人研究的基础上,考虑到建筑物阴影以及建筑物与传感器、建筑物与太阳相对位置对阴影影像结构的影响,给出建筑物高度与阴影的关系式,此方法的优点是考虑到建筑物走向线和太阳以及卫星的关系,而且不需要对建筑物阴影进行提取,完全是目视判断,使建筑物高度计算更为准确。文中提出的方法对北京市昌平区的建筑物高度进行反演,计算出相对误差,表明此方法是有效可行的。

With the rapid development of the remote-sensing technology,more and more high-resolution remote-sensing data that currently available for rapid-assessment of the earthquake,disaster investigation and the extraction of building information surge out.Research on the building-height inversion used the shadows of building has made some progress,but the formula is simple,and the object of research is ideal.The paper gives the relation of building-height and shadow considered the impact of buildings,buildingshadows,sensors,and the impact on the structure of shadow-image of relative position of the building with the sun.The advantage of this method show the relationship between the trend line of the building,the building,the sun,and the satellite,with out requiring to extract the shadow of the building.In order to make the calculation of the building-height more accurate,it is entirely visual-judgment.The proposed method is used to invert the building-height in Changping District of Beijing and to calculate the relative error,which proves to be feasible and effective.