Tie Liu, Mai Xu, Shengxi Li, Jialu Zhang, Liping Jiang
Recent years have witnessed an explosive increase of face content, which drives a distinct shift from static images to dynamic video formats. The shift of formats inherently alters the characteristics within face videos, whereby pixel-wise artifacts are intertwined with motion-related impairments. Addressing the emerging distortions that now always appear by twins in practice, however, is challenging and non-trivial, due to the distinct characteristics in addressing spatial-temporal frequencies in videos. In this paper, we propose a novel Unified recurrent network for joint Face video quality Enhancement and Stabilization (UniFES), as the first successful attempt for both quality enhancement and motion stabilization. Correspondingly, our UniFES method proposes to effectively aggregate the mutual information in the pixel and motion domains. For the quality enhancement, our UniFES method decomposes the shaking temporal alignment problem into progressive feature alignment with explicit physical information, which includes the global dynamics from the motion domain, i.e., from the stabilization task. Regarding the video stabilization, we integrate the mixed dynamics from the enhancement task (i.e., from pixel domain) to take into account both pixel-wise and motion-related characteristics, for ensuring robust trajectory estimation and motion stabilization. Subsequently, we refine the warping masks to achieve high-quality full frame rendering. We further establish a synthetic dataset for training and evaluation regarding this emerging task. Comprehensive experiments have illustrated the superior performances of our UniFES method over 32 comparing baselines on both newly established synthetic and real-world datasets.