Video Restoration Framework and Its Meta-adaptations to Data-Poor Conditions

Restoration of weather degraded videos is a challenging problem due to diverse weather conditions e.g., rain, haze, snow, etc. Existing works handle video restoration for each weather using a different custom-designed architecture. This approach has many limitations. First, a custom-designed architecture for each weather condition requires domain-specific knowledge. Second, disparate network architectures across weather conditions prevent easy knowledge transfer to novel weather conditions where we do not have a lot of data to train a model from scratch. For example, while there is a lot of common knowledge to exploit between the models of different weather conditions at day or night time, it is difficult to do such adaptation. To this end, we propose a generic architecture that is effective for any weather condition due to the ability to extract robust feature maps without any domain-specific knowledge. This is achieved by novel components: spatio-temporal feature modulation, multi-level feature aggregation, and recurrent guidance decoder. Next, we propose a meta-learning based adaptation of our deep architecture to the restoration of videos in data-poor conditions (night-time videos). We show comprehensive results on video de-hazing and de-raining datasets in addition to the meta-learning based adaptation results on night-time video restoration tasks. Our results clearly outperform the state-of-the-art weather degraded video restoration methods. The source code is available at: https://github.com/pwp1208/Meta_Video_Restoration.