Image pan-sharpening using enhancement based approaches in remote sensing

This paper proposes to do image enhancement before pan-sharpening; that is, the image enhancement techniques are used as a pre-processing step. The image enhancement techniques are proposed in two domains, same-domain and cross-domain. In the same-domain methods, the image enhancement techniques (such as Laplacian, Unsharp) are simply applied to multispectral (MS) and panchromatic (PAN) images to sharpen both images in the spatial domain. While in cross-domain, a novel hybrid combination of Laplacian Filter (LF) and Discrete Fourier Transformation (DFT) image sharpening technique is introduced. After image enhancement, the powerful Matting Model (MM) pan-sharpening technique is used to fuse both the enhanced images and produce a resultant image with the high spatial and spectral resolutions. The experimental results of the proposed approach outperform the others as compared to the state-of-art techniques over three datasets. The results are evaluated, considering both Qualitative and Quantitative evaluation metrics.