  Stereo image pairs can be used to improve the performance of super-resolution
(SR) since additional information is provided from a second viewpoint. However,
it is challenging to incorporate this information for SR since disparities
between stereo images vary significantly. In this paper, we propose a
parallax-attention stereo superresolution network (PASSRnet) to integrate the
information from a stereo image pair for SR. Specifically, we introduce a
parallax-attention mechanism with a global receptive field along the epipolar
line to handle different stereo images with large disparity variations. We also
propose a new and the largest dataset for stereo image SR (namely, Flickr1024).
Extensive experiments demonstrate that the parallax-attention mechanism can
capture correspondence between stereo images to improve SR performance with a
small computational and memory cost. Comparative results show that our PASSRnet
achieves the state-of-the-art performance on the Middlebury, KITTI 2012 and
KITTI 2015 datasets.
