Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Computationally Efficient Light Field Image Compression Using a Multiview HEVC Framework
Mid Sweden University, Faculty of Science, Technology and Media, Department of Information Systems and Technology. (Realistic3D)
COMSATS University Islamabad, Pakistan.
COMSATS University Islamabad, Pakistan.
COMSATS University Islamabad, Pakistan.
Show others and affiliations
2019 (English)In: IEEE Access, E-ISSN 2169-3536, Vol. 7, p. 143002-143014Article in journal (Refereed) Published
Abstract [en]

The acquisition of the spatial and angular information of a scene using light eld (LF) technologies supplement a wide range of post-processing applications, such as scene reconstruction, refocusing, virtual view synthesis, and so forth. The additional angular information possessed by LF data increases the size of the overall data captured while offering the same spatial resolution. The main contributor to the size of captured data (i.e., angular information) contains a high correlation that is exploited by state-of-the-art video encoders by treating the LF as a pseudo video sequence (PVS). The interpretation of LF as a single PVS restricts the encoding scheme to only utilize a single-dimensional angular correlation present in the LF data. In this paper, we present an LF compression framework that efciently exploits the spatial and angular correlation using a multiview extension of high-efciency video coding (MV-HEVC). The input LF views are converted into multiple PVSs and are organized hierarchically. The rate-allocation scheme takes into account the assigned organization of frames and distributes quality/bits among them accordingly. Subsequently, the reference picture selection scheme prioritizes the reference frames based on the assigned quality. The proposed compression scheme is evaluated by following the common test conditions set by JPEG Pleno. The proposed scheme performs 0.75 dB better compared to state-of-the-art compression schemes and 2.5 dB better compared to the x265-based JPEG Pleno anchor scheme. Moreover, an optimized motionsearch scheme is proposed in the framework that reduces the computational complexity (in terms of the sum of absolute difference [SAD] computations) of motion estimation by up to 87% with a negligible loss in visual quality (approximately 0.05 dB).

Place, publisher, year, edition, pages
2019. Vol. 7, p. 143002-143014
Keywords [en]
Compression, light field, MV-HEVC, plenoptic
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:miun:diva-37489DOI: 10.1109/ACCESS.2019.2944765OAI: oai:DiVA.org:miun-37489DiVA, id: diva2:1358279
Available from: 2019-10-07 Created: 2019-10-07 Last updated: 2019-10-11Bibliographically approved

Open Access in DiVA

fulltext(1837 kB)23 downloads
File information
File name FULLTEXT01.pdfFile size 1837 kBChecksum SHA-512
5d29f228dd884915ac45fb5d3b437f425fc63c99ba7d344de1e90869721044f8f11fbecd3a4c21b97f7659a7dcc08a2f2d5dec1852f6e5119bebc5daefbed159
Type fulltextMimetype application/pdf

Other links

Publisher's full textSoftware

Search in DiVA

By author/editor
Ahmad, WaqasSjöström, MårtenOlsson, Roger
By organisation
Department of Information Systems and Technology
In the same journal
IEEE Access
Electrical Engineering, Electronic Engineering, Information Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 23 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 219 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf