Blind Multi-Spectral Image Pan-sharpening
Published in 2020 45th IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2020
Recommended citation: Lantao Yu, Dehong Liu, Hassan Mansour, Petros T. Boufounos, and Yanting Ma. ICASSP 2020.
Abstract
We address the problem of sharpening low spatial-resolution multi-spectral (MS) images with their associated misaligned high spatial-resolution panchromatic (PAN) image, based on priors on the spatial blur kernel and on the cross-channel relationship. In particular, we formulate the blind pan-sharpening problem within a multi-convex optimization framework using total generalized variation for the blur kernel and local Laplacian prior for the cross-channel relationship. The problem is solved by the alternating direction method of multipliers (ADMM), which alternately updates the blur kernel and sharpens intermediate MS images. Numerical experiments demonstrate that our approach is more robust to large misalignment errors and yields better super resolved MS images compared to state-of-the-art optimization-based and deep-learning-based algorithms.