中文说明：
几种图像融合评价指标，AG,EN,FMI,MI,Qab,Qw,SF,SSIM，即平均梯度AG、信息熵EN、特征互信息FMI、互信息MI、边缘信息保持量Qab、加权融合质量评价因子Qw、空间频率SF和相似性指数SSIM。能较好的描述图像融合结果，稳定性较好。
English Description：
Several image fusion evaluation index, AG, EN, FMI, MI, Qab,'ve, SF, SSIM, namely, average gradient AG, information entropy EN, mutual information FMI, mutual information MI, keep edge information quantity Qab, weighted fusion quality evaluation factor've SF, spatial frequency and similarity index of SSIM.Can better describe the image fusion result, the stability is good.