中文说明：给出了图像融合中三种经典的融合算法：加权融合、PCA融合和IHS融合。程序中有比较详细的说明，特别适合初学图像融合者使用
English Description：
Three classical fusion algorithms in image fusion are presented: weighted fusion, PCA fusion and IHS fusion. The program has a more detailed description, especially suitable for beginners of image fusion