Hyperspectral Pansharpening With Guided Filter

A new hyperspectral (HS) pansharpening method based on guided filter is proposed in this letter. The proposed method, which obtains the spatial detail difference of each band successively, is different from the traditional component substitution method. The detail information of each band is extracted at first. Then, the panchromatic (PAN) image is sharpened to enhance the details. The spatial information difference between the enhanced PAN image and the detail information of each band is obtained using the guided filter, without causing spectral and spatial distortion. In order to reduce spectral distortion and add enough spatial information, the injection gains matrix is generated. The fused HS image is finally achieved by injecting the corresponding spatial difference into each band of the interpolated HS image. Experiments demonstrate that the proposed method can obtain superior performance in terms of subjective and objective evaluations.