摘要
随着遥感技术的发展,遥感影像的应用越来越为人们所关注。而遥感影像的处理成为不可缺少的关键环节。在遥感数据的采集过程中,由于受到仪器本身的误差及自然环境诸多因素的影响,不可避免的产生种种误差。为了获得真实反映地物信息的图像,必须进行纠正。本文详细介绍了引起辐射畸变的因素以及各种辐射纠正的方法,并以NOAA为例详细分析了其产生畸变的原因,并着重介绍了三种辐射定标方法:反射率法、辐亮度基法和辐照度基法,结果显示辐照度基法较为理想。
With the development of the remote sensing technology, people are paying more attention to the application of the satellite images. And the manipulation of the images becomes a vital step. In the procedure of the acquirement of remote sensing data, the aberration inevitably appears in the images due to miscellaneous factors. In order to get the real images, we must correct the images. This article introduces the factors of radiation aberration and the methods of radiometric calibration from two aspects: radiometric calibration of VIS and of TIR, and emphasizes three ways of radiometric calibration site. The reasons of aberration of NOAA AVHRR were analysed and calibrated with the three methods respectly. The result proved that the irradiance method is idealer.
出处
《影像技术》
CAS
2005年第1期34-36,共3页
Image Technology
