Subjective Quality Database and Objective Study of Compressed Point Clouds with 6DoF Head-mounted Display

Xinju WU, Yun ZHANG, Chunling FAN, Junhui HOU, Sam KWONG

Research output: Journal PublicationsJournal Article (refereed)peer-review

34 Citations (Scopus)


In this paper, we focus on subjective and objective Point Cloud Quality Assessment (PCQA) in an immersive environment and study the effect of geometry and texture attributes in compression distortion. Using a Head-Mounted Display (HMD) with six degrees of freedom, we establish a subjective PCQA database, named SIAT Point Cloud Quality Database (SIAT-PCQD). Our database consists of 340 distorted point clouds compressed by the MPEG point cloud encoder with the combination of 20 sequences and 17 pairs of geometry and texture quantization parameters. The impact of distorted geometry and texture attributes is further discussed in this paper. Then, we propose two projection-based objective quality evaluation methods, i.e., a weighted view projection based model and a patch projection based model. Our subjective database and findings can be used in point cloud processing, transmission, and coding, especially for virtual reality applications. The subjective dataset1 2 has been released in the public repository.
Original languageEnglish
Pages (from-to)4630-4644
Number of pages15
JournalIEEE Transactions on Circuits and Systems for Video Technology
Issue number12
Early online date30 Jul 2021
Publication statusPublished - Dec 2021
Externally publishedYes

Bibliographical note

This work was supported in part by Guangdong International Science and Technology Cooperative Research Project under Grant 2018A050506063, in part by Shenzhen Science and Technology Program under Grant JCYJ20180507183823045 and Grant JCYJ20200109110410133, and in part by the Membership of Youth Innovation Promotion Association, Chinese Academy of Sciences under Grant 2018392.


  • Point clouds
  • quality metrics
  • six degrees of freedom (6DoF)
  • subjective quality assessment
  • virtual reality


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