CAJ | 학술논문

“实践九号”(SJ-9)卫星是中国新技术试验卫星系列规划中的首发星，其中 A 星搭载的光学成像有效载荷技术试验项目为高分辨率多光谱相机，其图像数据将应用于国土资源调查与监测、农林业、环境保护、防灾减灾等领域，满足用户对高分辨率数据的需求。目前，遥感数据地面处理主要使用美国学者提出的调制传递函数补偿方法，而该文使用了中国科学家自主提出的直接解调成像方法处理“实践九号”A 卫星全色谱段的遥感图像。通过分析处理前后的敦煌靶标和法国靶标的调制传递函数(Modulation Transfer Function，MTF)和点扩散函数，认为经直接解调成像方法处理后的图像清晰度和MTF有明显提高，达到了国际上同类遥感图像处理方法的先进水平。
“실천구호”(SJ-9)위성시중국신기술시험위성계렬규화중적수발성，기중 A 성탑재적광학성상유효재하기술시험항목위고분변솔다광보상궤，기도상수거장응용우국토자원조사여감측、농임업、배경보호、방재감재등영역，만족용호대고분변솔수거적수구。목전，요감수거지면처리주요사용미국학자제출적조제전체함수보상방법，이해문사용료중국과학가자주제출적직접해조성상방법처리“실천구호”A 위성전색보단적요감도상。통과분석처리전후적돈황파표화법국파표적조제전체함수(Modulation Transfer Function，MTF)화점확산함수，인위경직접해조성상방법처리후적도상청석도화MTF유명현제고，체도료국제상동류요감도상처리방법적선진수평。
SJ-9A satellites are the Chinese first two technical test satellites of the SJ satellite series, of which the SJ-9A satellite carries a high resolution multispectral camera. The remote sensing images of SJ-9A satellite will be used in land resource survey and monitoring, agriculture and forestry, environmental protection, disaster prevention and mitigation, and so on. In this paper, direct demodulation (D-D) method which is put forward by Chinese scientists is used in full-color remote sensing image restoration of SJ-9A satellite. By ana-lyzing the MTF and PSF of Dunhuang target image and French target image before and after processing, it is shown that the image definition and MTF processed by D-D method are improved greatly. D-D method could enhance the quality of full-color remote sensing images and it has reached a high level of remote sensing image restoration methods.