【作者】 林如强；

【导师】 杨玉盛；

【作者基本信息】 福建师范大学 ， 自然地理学， 2010， 硕士

【摘要】 本文在系统地介绍了国内外光学成像仿真技术发展概况的基础上,分别对地表反射率生成、大气辐射传输、光学传感器原理进行了分析,提出基于叶面积指数等地表参数的航天遥感图像仿真流程。研究了基于先验知识的地表反射率生成思路,确立了获取LAI的模型和方法。通过对辐射传输模型MODTRAN4各输入参数进行深入分析,确定了各参数所使用的插值方法及插值点,建立了样条插值和线性插值相结合的大气辐射传输查找表查找方法。分别研究了传感器空间响应、光谱响应、噪声模拟及采样和量化等过程。利用Matlab编写各个过程的程序代码,集成了航天遥感图像仿真系统。该系统以LAI为输入信息,可以对不同的大气状况及传感器状况进行模拟,最终实现对任意传感器进行图像模拟。更多还原

【Abstract】 The development of optical imaging Simulation is introduced, and space remote sensing image simulation process based on the leaf area index and other surface parameters is studied in the paper, which anglicizing the surface reflectivity, atmospheric radiation transfer and optical sensor theory. In this paper the model and method for LAI is researched and the generating ideas about earth’s surface albedo based in priori knowledge is established. The radiative transfer model based on the input parameters of MODTRAN4 are in deep analysis. determining the parameters of the interpolation method and points, the atmospheric look-up-table are constructed with the spline and linear interpolation.In this paper, sensor spatial response, spectral response and the process of sampling and quantization are also introduced. Matlab is used to write the procedure of process, integrating the space remote sensing image simulation system. LAI data is input in this system, simulating for the different atmospheric conditions and sensor, and finally got the image of any sensors.更多还原