Correcting Spectra Outside the Backbone: A Model-Agnostic Rectifier for Hyperspectral Image Super-Resolution
HSI-SR methods often create unrealistic spectral oscillations during super-resolution. SR2-Net introduces a lightweight, plug-and-play rectifier module that can be added to any HSI-SR model without changing its core structure. It uses an enhancement stage to stabilize spectral interactions and a rectification stage to enforce physically plausible spectral structures, leading to improved fidelity and reduced artifacts.