期刊
IEEE TRANSACTIONS ON MULTIMEDIA
卷 20, 期 11, 页码 2905-2920出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TMM.2018.2825882
关键词
Light field; holoscopic; plenoptic; integral imaging; field-of-view scalability; image compression; HEVC
资金
- FCT (Fundacao para a Ciencia e a Tecnologia, Portugal) [SFRH/BD/79480/2011, UID/EEA/50008/2013]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/79480/2011, UID/EEA/50008/2013] Funding Source: FCT
Light field imaging based on microlens arrays-a.k.a. holoscopic, plenoptic, and integral imaging-has currently risen up as a feasible and prospective technology for future image and video applications. However, deploying actual light field applications will require identifying more powerful representations and coding solutions that support arising new manipulation and interaction functionalities. In this context, this paper proposes a novel scalable coding solution that supports a new type of scalability, referred to as field-of-view scalability. The proposed scalable coding solution comprises a base layer compliant with the High Efficiency Video Coding (HEVC) standard, complemented by one or more enhancement layers that progressively allow richer versions of the same light field content in terms of content manipulation and interaction possibilities. In addition, to achieve high-compression performance in the enhancement layers, novel exemplar-based interlayer coding tools are also proposed, namely: 1) a direct prediction based on exemplar texture samples from lower layers and 2) an interlayer compensated prediction using a reference picture that is built relying on an exemplar-based algorithm for texture synthesis. Experimental results demonstrate the advantages of the proposed scalable coding solution to cater to users with different preferences/requirements in terms of interaction functionalities, while providing better rate-distortion performance (independently of the optical setup used for acquisition) compared to HEVC and other scalable light field coding solutions in the literature.
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