A Generalized Cubemap for Encoding 360° VR Videos using Polynomial Approximation
| dc.contributor.author | Xiao, Jianye | en_US |
| dc.contributor.author | Tang, Jingtao | en_US |
| dc.contributor.author | Zhang, Xinyu | en_US |
| dc.contributor.editor | Lee, Jehee and Theobalt, Christian and Wetzstein, Gordon | en_US |
| dc.date.accessioned | 2019-10-14T05:08:18Z | |
| dc.date.available | 2019-10-14T05:08:18Z | |
| dc.date.issued | 2019 | |
| dc.description.abstract | 360° VR videos provide users with an immersive visual experience. To encode 360° VR videos, spherical pixels must be mapped onto a two-dimensional domain to take advantage of the existing video encoding and storage standards. In VR industry, standard cubemap projection is the most widely used projection method for encoding 360° VR videos. However, it exhibits pixel density variation at different regions due to projection distortion. We present a generalized algorithm to improve the efficiency of cubemap projection using polynomial approximation. In our algorithm, standard cubemap projection can be regarded as a special form with 1st-order polynomial. Our experiments show that the generalized cubemap projection can significantly reduce the projection distortion using higher order polynomials. As a result, pixel distribution can be well balanced in the resulting 360° VR videos. We use PSNR, S-PSNR and CPP-PSNR to evaluate the visual quality and the experimental results demonstrate promising performance improvement against standard cubemap projection and Google's equi-angular cubemap. | en_US |
| dc.description.number | 7 | |
| dc.description.sectionheaders | Multi-View and VR | |
| dc.description.seriesinformation | Computer Graphics Forum | |
| dc.description.volume | 38 | |
| dc.identifier.doi | 10.1111/cgf.13843 | |
| dc.identifier.issn | 1467-8659 | |
| dc.identifier.pages | 359-367 | |
| dc.identifier.uri | https://doi.org/10.1111/cgf.13843 | |
| dc.identifier.uri | https://diglib.eg.org:443/handle/10.1111/cgf13843 | |
| dc.publisher | The Eurographics Association and John Wiley & Sons Ltd. | en_US |
| dc.subject | Human | |
| dc.subject | centered computing | |
| dc.subject | Virtual reality | |
| dc.subject | Computing methodologies | |
| dc.subject | Virtual reality | |
| dc.subject | Image representations | |
| dc.title | A Generalized Cubemap for Encoding 360° VR Videos using Polynomial Approximation | en_US |