Example-based Enhancement of Degraded Video
Edson M. Hung, Diogo Caetano Garcia, Ricardo Lopes de Queiroz · IEEE Signal Processing Letters · 2014
We present an example-based approach to general enhancement of degraded video frames. The method relies on building a dictionary with non-degraded parts of the video and to use such a dictionary to enhance the degraded parts. The image degradation has to originate from a “repeatable” process, so that the dictionary image patches (blocks) are equally degraded, thus originating a dictionary with degraded blocks and their residues (differences in between degraded and original blocks). Once a match is found between a degraded block in the video and a degraded block in the dictionary, the associated residue of the latter is soft-added to the block of the former. The method is a generalization of the method for example-based super-resolution. Results are presented to demonstrate the applicability of the method to many scenarios.