高光谱干涉图像动态追踪补偿方法研究

结合基于位置姿态测量系统的目标动态追踪补偿校正和非等间隔快速傅里叶变换谱提取, 提出一种机载遥感的高准确度校正方法.该方法通过位置姿态组合系统在承载平台稳定性较差的成像条件下进行实时姿态测量、主动校正、反馈补偿获取干涉图, 再对校正后的干涉图进行空间变换和非均匀性谱提取, 获得融合图像和目标光谱曲线.机载飞行实验表明：多谱段伪彩色融合图像效果良好, 光谱反演准确度与传统校正方法相比有大幅提升.基于该方法的位置组合测量系统具有良好的机载环境适应性, 可应用于稳定性较差的平台以及非干涉型原理的光谱成像探测系统, 为机载高光谱图像运动误差一体化处理平台的研究提供了一条新途径.

Abstract

Combining the compensation corrections based on target dynamic tracking with the spectra extraction based on non-uniform fast Fourier transform, a method was proposed to realize the high precision correction of airborne remote sensing. Through the way of real-time attitude measuring, active correction, feedback compensation from position and orientation system under poor imaging condition of non-stable platform, the interferogram was obtained. The fused image and the spectral curves were obtained from the corrected interferogram by the spatial transformation and data extraction of non-uniformity. The results of airborne flight experiment show that the multi-spectral fusion image has a good quality, and the precision of spectrum recovery has been improved greatly compared with the traditional methods. The attitude measuing system based on the proposed method has a good environmental adaptability of airborne, which can be used not only for the poor stability platform but also for the other spectral imaging detection system besides the principle of interference spectroscopy imaging. The proposed method provides a way for the movement error correction of airborne integration hyperspectral image processing platform.

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