通过分析成像过程及其影响因素,提出了对成像积分时间进行控制的优化成像方法。首先建立成像参数模型,探讨了模型参数计算、成像过程中模型参数的选择,分析了图像后处理问题,并利用北京一号小卫星进行了遥感数据优化获取实验。实验结果表明,根据地物特性进行成像参数优化后获取的图像具有更宽的动态范围和更高的辐射分辨率,信息量和信噪比也大幅增强。

A parameter optimization method with adjustment of integration time is proposed with analysis of the imaging process and the affecting factors. An imaging parameter setting model is brought up. The model parameter calculation and selection are discussed. Specific post-processing of the images acquired with the proposed method is analyzed. Experiment is carried out with Beijing-1 small satellite data for optimized imaging and comparison. Results show that images acquired with the optimized method have wider dynamic range and higher radiometric resolution, and with advanced information entropy and signal noise ratio.