提出了一种基于小波变换的遥感图像融合的新方法。给出了梯度滤波器的矩阵形式，改进了Petrovic提出的灰度图像融合方法，并将其应用于ETM图像融合。和两幅原图像及灰度融合图像相比，新方法是有效的，不仅较大地增强了图像的空间细节表现能力，而且很好地保留了多光谱影像的光谱信息。

A new remote sensing image fusion method based on wavelet transform has been dev ised for the construction of fusion multispectral images. The method utilizes the gradient filter given in matrix form and an improvement of the fusion algori thm proposed by Petrovic,and was applied to the fusion of Landsat Enhanced Thema tic Mapper (ETM) images. The resulting images are superior to the original ETM i mages and gray fusion images. The method not only affords significant enhancemen t of spatial detail information, but also preserves the spectral information of the original multispectral image well.