图像融合的IHS变换法将原始多光谱图像从RGB空间变换到IHS空间，然后用高分辨率图像或用不同投影方式得到的待融合图像替代I分量-Image fusion IHS transform the original multispectral image is converted　RGB space to the IHS space, then I replace the fused image component with a high resolution image or a different way to get to be projected