图像MTF对立体定位测量精度影响的仿真研究  

Research on Effect of Image MTF and Stereo Positioning Precision by Simulation Method

作　　者：傅鹏[1] 孙世君[2] 王琨[1] 金元[1] 蔡汉辉[1] 孙权森[1] 朱近[1] 

机构地区：[1]南京理工大学计算机科学与技术学院,南京210094 [2]北京空间机电研究所,北京100076

出　　处：《系统仿真学报》2013年第5期1096-1102,共7页Journal of System Simulation

摘　　要：测绘相机在轨影像的质量是影响卫星遥感测绘精度的关键因素之一。调制传递函数(Modulation Transfer Function,MTF)反映了成像空间频率与图像对比度的关系,是遥感图像质量定量评价的一项重要指标。定量研究图像MTF对立体定位精度的影响是一项急需解决的课题。由于理论分析很难建立二者之间的数学关系,采用数字仿真技术进行研究,建立了自然、几何景物和相机的数字模型,用模拟遥感成像、MTF曲线模拟图像退化、特征点的提取与匹配和前方交会计算,得到了图像MTF与立体定位精度的关系。并通过实物物理模型实验对数字仿真结果的有效性进行验证。The image quality of mapping camera in satellite remote sensing mapping. The Modulation between spatial frequency and image contrast, which orbit is one of the key factors of the precision of Transfer Function （MTF） reflects the relationship is an important indicator for quantitative evaluation imaging of remote sensing image. Research of quantitative effect in image MTF and accuracy of stereo positioning is an urgent task. As it is difficult to get mathematical relationship between them by theoretical analysis, digital simulation technology was used, including creation digital models of natural scene, geometric scene and the camera, simulation remote sensing imaging, degrade image by MTF curve, extract and match feature points, and forward intersection calculating. Then the relationship between image MTF and accuracy of stereo positioning was obtained. At last, experiments were taken with the real physical model to validate the digital simulation results.

关 键 词：MTF 仿真 立体定位 模型 遥感 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] TP751[自动化与计算机技术—计算机科学与技术]