摘要
在星载光学遥感器设计过程中,利用计算机仿真技术模拟遥感器成像过程能够评估遥感系统设计可行性,并预测遥感器成像能力。针对高分辨率星载光学遥感器成像特点,提出一种基于低空遥感系统的成像仿真方法。以低空宽视场和多光谱图像数据为基础,利用图像分类、分类拟合等方法生成低空多光谱宽视场仿真图像,采用经验线性法进行反射率反演,结合星载光学遥感器空间分辨率、MTF、光谱响应等特性以及大气辐射传输理论得到遥感器入瞳处辐亮度仿真图像。将QuickBird卫星作为仿真对象,开展成像仿真实验,并评价仿真精度。实验结果表明仿真图像与卫星图像保持较高相似程度。
In the designing process of the satellite borne optical remote sensor, the technology of remote sensor imaging simulation can assess the feasibility of remote sensing system designing, and predict the imaging capability of the remote sensor. A high-resolution satellite borne optical remote sensor imaging simulation method was presented, which was based on the low-altitude remote sensing system. The data sources of the simulation were low-altitude wide-field image and multi-spectral image. Firstly, low-altitude multi-spectral wide field of simulation image was generated by image classification and classification fitting. Secondly, the ground surface reflectance image was calculated by the empirical linear method. Thirdly, the satellite borne optical remote sensing radiances image of sensors was simulated by the characteristics of spatial resolution, MTF, spectral response and atmospheric radiation transmission. The QuickBird satellite was used as a simulated object, the simulation experiment was operated, and the simulation precision was assessed. According to the experimental results, there is a high similarity between the simulation image and satellite image.
出处
《红外与激光工程》
EI
CSCD
北大核心
2014年第1期217-225,共9页
Infrared and Laser Engineering
基金
国家自然科学基金(41071232)
关键词
低空遥感系统
成像仿真
高分辨率
多光谱
全色
low-altitude remote sensing system
imaging simulation
high-resolution
multi-spectral
panchromatic
