LIIVSR: A Unidirectional Recurrent Video Super-Resolution Framework with Gaussian Detail Enhancement and Local Information Interaction Modules

The most popular methods for video super-resolution either rely on a time-sliding window approach to handle low-resolution frames, or utilize a recurrent structure that leverages previously estimated hidden features to recover the current frame. The existing methods do not make better use of initialization and local information. In this paper, we propose a video super-resolution (LIIVSR) framework with Gaussian detail enhancement and local information interaction modules. The proposed Gaussian detail enhancement module enhances the detail part of the hidden features to retain more motion details. To effectively utilize inter-frame local information, we propose a local information interaction module as a propagation framework. The information initialization module effectively extracts relevant information for video frames as the starting information for subsequent long-distance propagation. The multi-residual module obtains local forward and backward information from the coarse extraction of features. The local refinement module further interacts with features to extract fine local forward and backward information. Finally, this local information is used to derive the final super-resolution (SR) output. Our proposed LIIVSR framework achieves state-of-the-art performance on several benchmark datasets, outperforming existing methods in both speed and performance.