Facial video super resolution using semantic exemplar components
Chen Guang Xu, Anustup Choudhury, Peter van Beek, Andrew Segall · 2015
We present a method for video super resolution using exemplar images of semantic components. In previous work, we proposed a novel super resolution framework based on semantic components and applied it to still images of human faces. In this paper, we extend the approach to video sequences and propose several methods to overcome temporal jitter that results from standard single frame processing. To achieve consistent selection of facial components from a database of exemplars, we introduce a weighted histogram constructed over a temporal window. We then use pixel-based alignment between the exemplar and input image to reduce temporal jitter of the selected component. To further improve temporal stability, we include a temporal constraint into a final optimization stage that blends high resolution exemplar image data into the upscaled input image. We compare our results on face video clips to those of several state-of-the-art super resolution methods, demonstrating the efficacy of the proposed approach.