Abstract: In order to reserve spectrum information better on the base of high spatial resolution in the fusion image，the relationship for the information of high frequency between the high spatial resolution image and the multispectral image was studied；ISM（Inter-Band Structure Model） is introduced to the method of image fusion based on wavelet transform，the quondam method of fusion was improved；The method of image fusion based on ISM model and wavelet transform（shortened form：I-W） was proposed；After the contradistinctive experiments among HIS method，PCA method and the method proposed in this paper，the spatial information and spectrum information of the image can reserve better by the method proposed in this paper.

Key words: image fusion, wavelet transform, remote sensing image, Inter-Band Structure Model（ISM）

摘要： 为了使融合图像在高空间分辨率的基础上较好地保留光谱信息，研究了高分辨率图像和多光谱图像中的高频信息的关系；在基于小波变换的图像融合方法中引入ISM模型（Inter-Band Structure Model），改进了原有的融合方法；提出了基于ISM模型与小波变换（Wavelet Transform）（简称I-W）的图像融合方法；通过与HIS方法及PCA方法进行了实验对比，结果证明：文中所提出的方法能较好地保留图像的空间和光谱信息。

关键词: 图像融合, 小波变换, 遥感图像, ISM模型