光学技术, 2009, 35 (3): 359, 网络出版: 2010-01-12
LCTF调谐的高光谱成像系统辐射定标方法研究*
Radiometric calibration method for LCTF hyperspectral image
积分时间 定标 积分球定标系统 LCTF liquid crystal tunable filter calibration exposure time integrating sphere calibration system
摘要
简单介绍了基于LCTF调谐的高光谱成像系统积分时间定档，重点描述了一个定标检测系统，并从暗电流、响应线性、均匀性和稳定性四个方面详细阐述了定标方法。通过在实验室对相机的定标实验，给出了辐射定标系数；并利用一次野外试验获取的数据，对定标系数进行验证。试验数据的分析表明，该定标系数可用于光学图像处理中的辐射校正，实现图像数据的定量化分析。
Abstract
It is briefly introuduced that how to divide exposure time of the hyperspectral imaging system based on LCTF.The calibration method and its system is described.The calibration method elaborated in details is from dark current,linearity and uniformity of response and stability of the imaging system.The calibration experiment to the imaging system is taken place in the lab.and the radiometic correction coefficient is obtained.A group of image data acquired in January,2008 on site field can be used to validate the radiometic correction coefficient.It is certified according to the analysis of the image data that the radiometic correction coefficient can be used to radiometic correction of optical image and further more to realize the qulification of the image data in reomote sensing area.
方薇, 张冬英, 钱玮, 洪津, 杜丽丽. LCTF调谐的高光谱成像系统辐射定标方法研究*[J]. 光学技术, 2009, 35(3): 359. FANG Wei, ZHANG Dong-ying, QIAN Wei, HONG Jin, DU Li-li. Radiometric calibration method for LCTF hyperspectral image[J]. Optical Technique, 2009, 35(3): 359.
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