基于图像灰度统计的空间相机载荷响应稳定性测试  

Response Performance Test of Space Camera Based on Image Gray Scale Statistics

作　　者：郑柯 卢冬亮 胡振龙 ZHENG Ke;LU Dongliang;HU Zhenlong(China Tianhui Centre,Beijing 100089,China)

机构地区：[1]中国天绘中心,北京100089

出　　处：《航天返回与遥感》2018年第5期96-103,共8页Spacecraft Recovery & Remote Sensing

摘　　要：相对辐射校正残余条纹是影响光学遥感卫星影像品质的因素之一。文章通过灰度统计法分析证明,空间相机载荷响应不稳定是相对辐射校正残余条纹的重要成因。以辐射响应函数模型为基础,通过直方图统计和直方图匹配,以某立体测绘相机载荷图像奇偶条纹现象为例,分析了不同成像时间段感光探元响应变化。分析结果表明:空间相机响应状态变化可明显影响相对辐射校正效果,相对辐射校正后还需一定的后处理,才能保证图像品质符合要求。As one of the common factors,the residual streaks after relative radiometric correction have much effect on the image quality of optical remote sensing satellite.In this paper,the sensitivity of the photo detector response is proved to be another important factor of the residual streaks phenomenon after relative radiometric correction in addition to the high compression ratio.Based on the radiation response function model,and by histogram statistic and matching,the phenomena of odd and even streaks in the image of a stereoscopic camera are taken as examples to test.The change of the response state in the space camera has obvious influence on the relative radiometric correction effect,and the image quality requirement can be satisfied after certain post-processing on the relative radiation correction.

关 键 词：相对辐射校正 直方图统计 响应稳定性 空间相机 

分 类 号：V443.5[航空宇航科学与技术—飞行器设计]