For most of the traditional image fusion methods

the spectral distortion of the fused images is a common problem.The major reason relates closely to the different spectral characteristics of sensors.In this paper

a novel spectral preservation fusion method for remotely sensed images is presented by considering the spectral characteristics of sensors.The method is mainly based on the fast IHS transform.After analyzing the spectral response of the multispectral and panchromatic sensors

the IHS fusion method has been improved in two parts:the construction of intensity component and the injection method of detail information.In the proposed method

the spectral distortion is reduced significantly and all the multispectral bands can be fused at the same time.To evaluate the performance and efficiency of the proposed method

two experiments are carried out on IKONOS and ETM+ images respectively.The results show that the proposed method is better than other methods.It can keep almost the same spatial resolution as the panchromatic images and minimize color distortion.