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针对地形起伏对高光谱遥感图像几何变形和辐射变化的影响,建立高光谱遥感地形影响模型.该模型利用传感器位置、姿态和视场角建立模拟图像像元坐标和地面空间坐标之间的成像几何关系,利用地表反射率、数字高程模型等数据,考虑大气辐射传输过程,计算起伏地形下传感器入瞳辐亮度图像,并经过空间分辨率转换,生成最终遥感模拟图像,实现高光谱遥感地形影响精确建模.利用西藏驱龙地区Hyperion数据和其它相关数据进行仿真分析,将模拟图像和原始图像进行对比,结果比较吻合,表明该模型具有较好的模拟效果.
Aiming at the influence of topographic relief on geometric deformation and radiation change of hyperspectral remote sensing images, an impact model of hyperspectral remote sensing terrain is established, which uses the sensor position, attitude and field of view to establish the imaging geometry between the pixel coordinates and the space coordinates Relationship, the use of surface reflectance, digital elevation model and other data, taking into account the atmospheric radiation transmission process, the calculation under undulating terrain sensor pupil radiance images, and after the spatial resolution conversion to generate the final remote sensing simulation images, the hyperspectral remote sensing terrain impact accurate Modeling.Using the Hyperion data and other relevant data from the DRY region in Tibet for simulation analysis, the simulation images are compared with the original images, and the results are in good agreement, indicating that the model has good simulation results.