基于城市GCP模板的遥感图像几何校正研究

Study of remote sensing image geometric rectification based on city GCP template

提出了一种自动寻找地面控制点进行遥感图像几何校正和配准定位的方法。分析遥感图像产生几何畸变的原因,介绍几何校正的原理和方法。由于中国地区大城市分布具有确定的几何关系,故可以将城市分布图作为模板自动地在待校正图像上匹配上相应的城市地面控制点。进而利用已匹配的GCP对遥感图像进行校正和定位。仿真结果表明,该算法不需要人为寻找GCP,运行速度快,结果令人满意。

A method of remote sensing image geometric rectification and registration based on automatic search for ground control points is proposed. Firstly this paper analyzes the reason Of geometric distortion, and introduces the principles and methods of geometric rectification. Because of major cities distribution in China have identified the geometric relationship, so the city distribution map as a template can automatically correct the image to be matched in the corresponding urban ground control points. Then use GCP has been matched to correct the remote sensing image. The simulation results show that the algorithm does not need people looking for GCP, operational speed with satisfactory results.