IHS变换和小波变换相结合的遥感影像融合

Remote-Sensing Images Fusion Based on IHS and Wavelet Transforms

本文针对低分辨率多光谱影像与高分辨率全色影像的融合，提出了一种IHS变换和小波变换相结合的遥感影像融合方法。方法首先对多光谱影像作IHS正变换，得到亮度I、色度H和饱和度S三个分量：然后利用小波变换融合方法，融合多光谱影像的亮度分量与全色影像，并用融合后的影像替代多光谱影像的亮度分量；最后，利用IHS反变换得到新的多光谱影像。试验结果分析表明，新方法的性能优于IHS变换融合方法、小波变换融合方法，在增强融合影像的空间细节表现能力的同时，很好地保留了多光谱影像的光谱信息。

A new fusion method for remote-sensing images based on IHS and wavelet transform is presented to fuse multi-spectral images and panchromatic images. First, intensity I, hue H and saturation S components of the multi-spectral images is obtained by IHS transform; Then, the panchromatic images and I component of the multispectral images are fused by WT fusion method, and I component is replaced by the fused data; Finally, the result images are obtained by inverse IHS transform. Examination result indicate the new method is better than IHS and wavelet transform fusion method. It enhances spatial detail information of the fused images and preserves spectral information of the multi-spectral images well.