红外与毫米波学报2023，Vol.42Issue(6)：853-864,12.DOI:10.11972/j.issn.1001-9014.2023.06.019
机载高光谱可见近红外/短波红外模块视轴角自校正方法研究
A self-calibration method of the boresight angles of airborne hyperspectral VNIR/SWIR modules
摘要
Abstract
External field-of-view(FOV)stitching is an effective way to achieve an airborne hyperspectral imaging sys-tem with both a large field-of-view and a wide spectral sampling range.However,due to the independent installation of each module,the boresight angles between the corresponding VNIR module and SWIR module will change after a long period of equipment operation,and the change of boresight angles will negatively affect the data fusion effect.The over-lap of FOV makes the calibration method based on the epipolar geometry and homography constraints ineffective in solv-ing the boresight angles between the corresponding VNIR/SWIR modules.In this paper,an algorithm based on the re-projection error is proposed for an airborne hyperspectral imaging system with external field-of-view stitching to achieve self-calibration of the boresight angles and focal length between the VNIR/SWIR backends.The algorithm has been ap-plied to the Airborne Multi-Modality Imaging Spectrometer(AMMIS).Experimental results show that the average er-ror of the method is less than 0.2 pixels,and it is also well adapted to tilt-placed modules.关键词
视轴角校正/航空高光谱/可见近红外/短波红外/多模块Key words
boresight angle calibration/hyperspectral/VNIR/SWIR/multi-module分类
信息技术与安全科学引用本文复制引用
郭然,王跃明..机载高光谱可见近红外/短波红外模块视轴角自校正方法研究[J].红外与毫米波学报,2023,42(6):853-864,12.基金项目
民用航天预研重点项目(D040102) Supported by the National Civil Aerospace Project of China(D040102) （D040102）
