基于有理函数模型的线阵CCD遥感影像水平纠正技术  

The Transformation from Tilted Image to Horizontal Image of Line Camera Based on the Rational Function Model

作　　者：巩丹超[1] 汤晓涛[1] 张丽[1] 

机构地区：[1]西安测绘研究所,陕西西安710054

出　　处：《测绘科学技术学报》2012年第4期240-243,248,共5页Journal of Geomatics Science and Technology

基　　金：国家自然科学基金项目(40901245)

摘　　要：利用有理函数模型替代严格传感器模型已经成为当前高分辨率遥感影像通用的数据标准。对于附加有理函数模型系数的线阵CCD遥感影像,提出了一种利用反解有理函数模型实现倾斜像片与水平像片转换方法。其主要原理同传统框幅式倾斜影像与水平影像的转换相似:将倾斜像片上像点投影到物方水平面上;然后在物方水平面上根据原始倾斜像片的地面采样间隔进行重采样,即可获取线阵CCD遥感影像的水平影像。最后通过试验分析比较原始影像和纠正后的倾斜像片,得出关于纠正后线阵CCD卫星遥感影像的几何特性。Utilizing the rational function model（RFM） to replace physical sensor models in photogrammetric mapping is becoming a standard way for economical and fast mapping from high-resolution images. To an image of line camera with the rational function coefficients, a method which can use the inverse form of RFM to transform the titled image to the horizontal image was provided. A point on the titled image is projected into an object horizontal plane and the image on the object plane is resampled according to the ground sample distance of original image. The new image can be regarded as the horizontal image of line camera. At last compared the original image with the corrected image through the experiments, the geometric character of the new horizontal image was analyzed and some useful conclusion about the horizontal image of line camera was obtained.

关 键 词：有理函数模型 线阵CCD传感器 水平影像 倾斜影像 影像纠正 

分 类 号：P237[天文地球—摄影测量与遥感]