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Geometric Distortion Correction for Hyperspectral Image Using a Rotating Scan Reflector

文献类型： 外文期刊

作者： Ke Gang-yang 1 ; An Ning 1 ; Tian Yang-chao 1 ; Ma Zhi-hong 2 ; Huang Wen-jiang 2 ; Wang Qiu-ping 1 ;

作者机构： 1.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Natl Engn Res Ctr Informat Technol Agr, Beijing 100097, Peoples R China

关键词： Offner;Imaging spectrometer;Rotating scan;Line scan

期刊名称：SPECTROSCOPY AND SPECTRAL ANALYSIS （ 影响因子：0.589； 五年影响因子：0.504 ）

ISSN： 1000-0593

年卷期： 2012 年 32 卷 8 期

页码：

收录情况： SCI

摘要： Offner imaging spectrometer is a kind of pushbroom imaging system. Hyperspectral images acquired by Offner imaging spectrometers require relative motion of sensor and scene that is translation or rotation. Via rotating scan with a reflector at the front of sensor's len, large objects can be entirely captured. But for the changes in object distances, geometric distortion occurs. A formula of space projection from an object point to an image point by one capture was derived. According to the projection relation and slit's motion curve, the object points' coordinates on a reference plan were obtained with rotation angle for a variable. A rotating scan device using a reflector was designed and installed on an Offner imaging spectrometer. Clear images were achieved from the processing of correction algorithm.

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