Band Dependent Spatial Details Injection Based on Collaborative Representation for Pansharpening

This paper proposes an improved version of the generalized band dependent spatial detail pansharpening method. The proposed method called collaborative representation based band dependent spatial detail (CR-BDSD) benefits the advantages of collaborative representation (CR) to increase the difference between the panchromatic image and the approximation image. Therefore, the highlighted detail image is provided. Then, by adding it to the upsampled multispectral image, the pansharpened image is generated. The use of local spectral-spatial information and also removing noise and redundant spatial features are other benefits of CR in the pansharpening product. According to the experimental results, the CR-BDSD method provides superior fusion results in terms of both quantative and qualitative measures.