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dc.contributor.authorXiao, Jianyeen_US
dc.contributor.authorTang, Jingtaoen_US
dc.contributor.authorZhang, Xinyuen_US
dc.contributor.editorLee, Jehee and Theobalt, Christian and Wetzstein, Gordonen_US
dc.description.abstract360° 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.publisherThe Eurographics Association and John Wiley & Sons Ltd.en_US
dc.subjectcentered computing
dc.subjectVirtual reality
dc.subjectComputing methodologies
dc.subjectVirtual reality
dc.subjectImage representations
dc.titleA Generalized Cubemap for Encoding 360° VR Videos using Polynomial Approximationen_US
dc.description.seriesinformationComputer Graphics Forum
dc.description.sectionheadersMulti-View and VR

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  • 38-Issue 7
    Pacific Graphics 2019 - Symposium Proceedings

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