多模态CCD 相机辐射校正方法研究.pdf

文档介绍：D 相机辐射校正方法研究
李波 1、2、3,刘志刚 1、2、3*,张立新 1、2、3,孙志超 1、2、3
((北京师范大学),北京,100875;
,北京,100875;
,北京,100875)

摘要:D 相机可以根据地物辐亮度的差异,调节相机的积分时间和增益以获取
理想的影像数据。如何对不同积分时间和增益设置下获取的数据进行辐射校正,是数据定量
化运用的关键。为了因避免相机设置改变而重复辐射定标,本文通过实验发现相机暗电流受
积分时间和增益的影响较小,在此基础上本文提出一种辐射校正方法可以基于某种积分时间
和增益设置下的辐射校正函数推算其它设置下的辐射校正函数。实验结果显示此方法较为理
想。
关键词:辐射校正;多模态相机;积分时间;增益;暗电流
中图分类号:TP73 文献标识码:A

Radiometric Correction of Multi-D Camera
LI Bo1、2、3, LIU Zhigang1、2、3, ZHANG Lixin1、2、3, SUN Zhichao1、2、3
( of Geography and Remote Sensing Science, Beijing Normal University ,
Beijing,100875;
Key Laboratory of Remote Sensing Science (Beijing Normal University),Beijing,
100875;
3. Beijing Key Laboratory for Remote Sensing of Environment and Digital Cities,
Beijing Normal University,Beijing,100875)
Abstract: Multi-D camera can obtains high quality image data via adjusting time of
exposure and gain according to different radiance of ground surface. It is essential for quantitative
application to develop radiometric correction method of data acquired under different time of
exposure and gain setting. To avoid repeated radiometric calibration for different setting, a method
is proposed based on the camera property that the exposure time and gain have little influence on
the dark current D camera, B