北京1号小卫星图像噪声评估  

Image-based noise estimation of Beijing-1 small satellite

作　　者：冉琼[1,2] 迟耀斌[2,3] 王智勇 陈正超[4] 

机构地区：[1]中国科学院遥感应用研究所,北京100101 [2]北京字视蓝图信息技术有限公司,北京100096 [3]北京遥感信息研究所,北京100085 [4]中国科学院对地观测与数字地球科学中心,北京100190

出　　处：《遥感学报》2009年第3期549-558,共10页NATIONAL REMOTE SENSING BULLETIN

基　　金：Beijing Science and Technology Plan Item (No. Z08000102010801);National Science & Technology Pillar Program (No. 2007BAH151303)

摘　　要：从理论和试验方面对图像的噪声评估方法进行了分析。结合北京1号小卫星特性,进行了该类方法应用效能的评价,讨论了分块评估噪声方法的最佳参数设置。选取满足噪声评估环境的图像,实现了综合不同地表覆盖条件的北京1号小卫星图像噪声的评估。噪声评估结果与在轨测试情况的对比表明,北京1号小卫星经过近3年的运行,仍保持了较好的性能。Noise estimation plays significant role in payload assessment, image processing and data application. In this paper, considering characteristics of Beijing-1 small satellite, the image-based noise estimation methods with their applicability are appraised and compared through experiments. The parameters and model optimization are also discussed for better assessment of noise. With comprehensive analysis of noise estimation results from different land cover types, the Beijing-1 small satellite noise is evaluated with its standard deviation. Comparison of the noise estimation from images acquired in 2008 and the in-orbit test right after launch in 2005 shows that noise level of the Beijing-1 small satellite does not change, the satellite has well-kept performance even after 3 years of operation.

关 键 词：噪声评估 北京1号小卫星 噪声标准差 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置]