摘要
调制传递函数 (MTF)是相机系统再现图像质量的量度 ,是评价相机像质的关键指标。而离焦是导致传递函数下降的一个重要因素。本文分析了航天遥感相机产生离焦的原因 ,给出了相机离焦时 ,计算MTF的简易数学方程 ,并为保证长焦距相机获得高清晰度图像提供了试验依据。
Generally the characteristic of spatial resolution for camera is denoted by modulation transfer function (MTF). While out of focus is one of the reasons that make the MTF decline. The amount of off- focus of the camera is given based on the temperature and distance and the influence to MTF is given.
出处
《长春理工大学学报（自然科学版）》
2004年第2期26-28,共3页
Journal of Changchun University of Science and Technology(Natural Science Edition)
基金
航天部项目
关键词
离焦
MTF
温度
轨道高度
out of focus
MTF
atmospheric temperature
distance
