A Unified Anti-aliasing Method for Deferred Shading

Post-processing anti-aliasing algorithm for deferred shading has been widely studied and used in recent years. The existing algorithms were designed for one unique type of aliasing. In this paper, we propose a unified method to deal with various anti-aliasing in a post-processing way. It can achieve high-quality geometric feature anti-aliasing with sub-pixel-level geometric information, as well as texture anti-aliasing using a morphological algorithm and the shading information. Since combining the two type of anti-aliasing algorithms would lead to unsmooth transition between screen pixels, a reprojection anti-aliasing algorithm is accompanied with the screen space anti-aliasing filter. In this way, the temporal aliasing, appearing as flickering phenomenon in animated scenes, can be largely alleviated. The implementation results demonstrate that the proposed algorithm can process geometric edge aliasing, texture edge aliasing and temporal aliasing in real-time.