基于资源三号03星的立体像对核线重采样方法研究  

Research on Epipolar Resampling Method of Stereo Image Based on ZY3-03 Satellite

作　　者：张政 许殊 章文毅 方毅[3] 黄鹏 程博 ZHANG Zheng;XU Shu;ZHANG Wenyi;FANG Yi;HUANG Peng;CHENG Bo(College of Resources and Environment,University of Chinese Academy of Sciences,Beijing101400,China;Aerospace Information Research Institute,Chinese Academy of Sciences,Beijing 100080,China;School of Remote Sensing and Information Engineering,Wuhan University,Wuhan 430079,China)

机构地区：[1]中国科学院大学资源与环境学院,北京101400 [2]中国科学院空天信息创新研究院,北京100080 [3]武汉大学遥感信息工程学院,湖北武汉430079

出　　处：《地理信息世界》2022年第6期21-25,共5页Geomatics World

摘　　要：针对ZY3-03卫星影像三维重建需求,基于资源三号03星前、正、后视影像提出了一种改进的基于物方基准的立体像对核线重采样方法。首先对影像作分块处理,通过投影轨迹法定义核线,并利用最小二乘拟合法确定近似核线方向;其次建立原始影像到核线影像的正反坐标转换关系;最后利用双线性插值方法对核线影像进行重采样,并以核线影像同名点上下视差验证核线影像精度。实验证明,该方法生成的核线影像上下视差最大值为0.9个像素,均方根误差为0.5个像素,符合精度要求。To meet the needs of 3D reconstruction of ZY3-03 satellite images,based on the front,front and rear view images of ZY3-03 satellite,an improved stereo image re-sampling method based on object-space datum is proposed.Firstly,the image is divided into blocks,the epipolar line is defined by the projection trajectory method,and the approximate epipolar line direction is determined by the least square fitting method;Secondly,the coordinate transformation relationship between the original images and the epipolar images is established;Finally,the bilinear interpolation is used to resample the epipolar image,and the parallax of the epipolar image was used to verify the accuracy of the epipolar image.Experiments show that the maximum vertical-parallax of the epipolar image generated by this method is 0.9 pixel,and the root mean square error is 0.5 pixel,which meets the accuracy requirements.

关 键 词：核线重采样 资源三号03星 有理函数模型 上下视差 

分 类 号：P237[天文地球—摄影测量与遥感]