CAJ | 학술논문

获取高分辨光谱图需要克服探测器空间分辨率低的问题.一个有效解决方案是融合多幅相互间在像面内有亚像元位移的低分辨光谱图为一幅高分辨光谱图.为此提出了平均带限递推亚像元算法.根据亚像元递推公式的双向性,分别滑首-末和末-首两个方向各自递推出一组亚像元值,并将它们的平均值作为最终亚像元值.基于高斯单、双峰的数值实验表明,该方法可有效提高重建哑像元光谱图的精度.
획취고분변광보도수요극복탐측기공간분변솔저적문제.일개유효해결방안시융합다폭상호간재상면내유아상원위이적저분변광보도위일폭고분변광보도.위차제출료평균대한체추아상원산법.근거아상원체추공식적쌍향성,분별활수-말화말-수량개방향각자체추출일조아상원치,병장타문적평균치작위최종아상원치.기우고사단、쌍봉적수치실험표명,해방법가유효제고중건아상원광보도적정도.
Insufficient spatial resolution of detectors is an obstacle to capturing spectra with high resolution. An effective solution is sub-pixel restoration, which can restore a high resolution spectrogram from sub-pixel shifted low resolution ones. In the pres-ent paper, an algorithm for sub-pixel restoration is suggested. It utilizes the bidirectional recursive relation between sub-pixel values and estimates each sub-pixel value from both directions of head-end and end-head. As a result, the averaged value will be accepted as the sub-pixel value. Numerical experiments on single gauss profile and superposition ones verified the effectiveness of the algorithm.