一种融合中分辨率多光谱与高分辨率全色图像的方法

针对中分辨率多光谱与高分辨率全色图像空间分辨率差异大,导致融合结果难以较好平衡光谱信息保持和空间信息保持能力的问题,该文分析了7种常用融合方法用于中分辨率多光谱与高分辨率全色图像融合的优缺点及其融合质量的影响因素,提出了一种组合融合方法。该方法在保留Gram-Schmidt方法的细节注入方式的基础上,综合利用高通滤波法和Gram-Schmidt方法的优势构造低分辨率全色图像,确保在提高融合图像空间分辨率的同时有效降低其光谱变形。通过CBERS-02多光谱和IRS-P5全色图像的实验,证明了新融合方法的有效性。

A Fusion Method for Mid-resolution Multi-spectral Image and High-Resolution Panchromatic Image

For pan-sharpening mid-resolution multi-spectral image and high-resolution panchromatic image,a better balance between spectral information maintaining and spatial information maintaining can hardly achieved because of the large resolution gap.Based on analyzing the characteristic and factors affecting fusion quality of seven popular fusion methods,a new fusion method is proposed to improve the resolution of the fusion result while minimizing the spectral distortion by combining methods of constructing low resolution panchromatic image in high pass filter resolution merging method and Gran-Schmidt spectral sharpening method and adopting the default injecting manner of the latter method.Experiment is carried out on CBERS-02 multi-spectral and IRS-P5 panchromatic image,and the result shows that the new method performs superiority.