Bidirectional Warping for Single-Pass Stereo Rendering

Jaemyung Kim, Jaewon Choi, Sungkil Lee

http://doi.org/10.5626/JOK.2019.46.12.1215

Stereo images can effectively provide realism to entertainment contents such as movies and games. However, rendering for both eyes increases the computational load. Image warping can reduce number of computations required on two images to one time, but in some cases, the additional processes to fill hole that occurs during warping may require more cost than warping. In this paper, we present a bidirectional warping technique that minimizes the occurrence of hole and its implementation. The technique reduces possibility of hole creation by increasing the area of sampled pixels by changing the rendered view according to the visibility of the geometry. In a stereo image with low visual similarity, this method shows a higher quality improvement compared to the conventional image warping method. This technique is highly scalable and can be effectively used for rendering process that require complex geometric and shading calculations.