The rhombic dodecahedron map : An efficient scheme for encoding panoramic video

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Detail(s)

Original languageEnglish
Article number4895316
Pages (from-to)634-644
Journal / PublicationIEEE Transactions on Multimedia
Volume11
Issue number4
Publication statusPublished - Jun 2009

Abstract

Omnidirectional videos are usually mapped to planar domain for encoding with off-the-shelf video compression standards. However, existing work typically neglects the effect of the sphere-to-plane mapping. In this paper, we show that by carefully designing the mapping, we can improve the visual quality, stability and compression efficiency of encoding omnidirectional videos. Here we propose a novel mapping scheme, known as the rhombic dodecahedron map (RD map) to represent data over the spherical domain. By using a family of skew great circles as the subdivision kernel, the RD map not only produces a sampling pattern with very low discrepancy, it can also support a highly efficient data indexing mechanism over the spherical domain. Since the proposed map is quad-based, geodesic-aligned, and of very low area and shape distortion, we can reliably apply 2-D wavelet-based and DCT-based encoding methods that are originally designated to planar perspective videos. At the end, we perform a series of analysis and experiments to investigate and verify the effectiveness of the proposed method; with its ultra-fast data indexing capability, we show that we can playback omnidirectional videos with very high frame rates on conventional PCs with GPU support. © 2009 IEEE.

Research Area(s)

  • Graphics processing unit (GPU), Omnidirectional video, Panoramic video, Rhombic dodecahedron, Spherical mapping, Video encoding

Citation Format(s)

The rhombic dodecahedron map : An efficient scheme for encoding panoramic video. / Fu, Chi-Wing; Wan, Liang; Wong, Tien-Tsin; Leung, Chi-Sing.

In: IEEE Transactions on Multimedia, Vol. 11, No. 4, 4895316, 06.2009, p. 634-644.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review