摘要
为探索林区地形起伏对空间分辨率为 2 5m的Spot5遥感图像几何精校正的影响规律 ,在理论分析地形起伏造成遥感图像像点位移的基础上 ,通过比较控制点间实测距离和图像上相应距离的偏差 ,研究了林区Spot5遥感图像像点位移的变化规律 .利用GPS虚拟网络参考站定位系统 ,以厘米级精度测定校正遥感图像的地面控制点 .根据地面控制点海拔高度的差异设置 4种校正方案 ,对Spot5遥感图像进行几何精校正 .通过比较各种校正方案对图像变形的纠正效果 。
In order to probe the influence of wavy terrain on Spot5 remote sensing image calibration in forest areas, on the basis of theoretically analyzing pixel displacement caused by wavy terrain, the changing law of pixel displacement of remote sensing image of Spot5 was studied in forest areas through the comparison of deviation between real surveying interval and the corresponding interval on image.By means of GPS dummy network reference station positioning system, the ground control points for the calibration of remote sensing image were surveyed with the precision of centimeter level. Four calibration schemes were designed according to the different heights of ground control points. The remote sensing image of Spot5 was calibrated by these four schemes. By the comparison of calibration effects of four schemes, the influence of wavy terrain on Spot5 remote sensing image calibration was studied particularly in forest areas.
出处
《北京林业大学学报》
CAS
CSCD
北大核心
2004年第2期6-10,共5页
Journal of Beijing Forestry University
基金
国家自然科学基金项目 ( 3 0 3 7115 9)资助
关键词
地形起伏
像点位移
校正模型
图像变形
wavy terrain, pixel displacement, calibration model, image distortion
