Editing Point cloud (section)

== MPEG Point Cloud Compression ==

MPEG began standardizing point cloud compression (PCC) with a Call for Proposal (CfP) in 2017.<ref>{{cite web |url=http://www.mpeg-pcc.org/ |title=MPEG Point Cloud Compression |author=<!--Unstated--> |access-date=2020-10-22}}</ref><ref>{{cite journal |last1=Schwarz |first1=Sebastian |last2=Preda |first2=Marius |last3=Baroncini |first3=Vittorio |last4=Budagavi |first4=Madhukar |last5=Cesar |first5=Pablo |last6=Chou |first6=Philip A. |last7=Cohen |first7=Robert A. |last8=Krivokuća |first8=Maja |last9=Lasserre |first9=Sébastien |last10=Li |first10=Zhu |last11=Llach |first11=Joan |last12=Mammou |first12=Khaled |last13=Mekuria |first13=Rufael |last14=Krivokuća |first14=Maja |last15=Nakagami |first15=Ohji |last16=Siahaan |first16=Ernestasia |last17=Tabatabai |first17=Ali |last18=Tourapis |first18=Alexis M. |last19=Zakharchenko |first19=Vladyslav |date=2018-12-10 |title=Emerging MPEG Standards for Point Cloud Compression |journal= IEEE Journal on Emerging and Selected Topics in Circuits and Systems |volume=9 |issue=1 |pages=133–148 |doi=10.1109/JETCAS.2018.2885981 |doi-access=free}}</ref><ref>{{cite journal |last1=Graziosi |first1=Danillo |last2=Nakagami |first2=Ohji |last3=Kuma |first3=Satoru |last4=Zaghetto |first4=Alexandre |last5=Suzuki |first5=Teruhiko |last6=Tabatabai |first6=Ali |date=2020-04-03 |title=An overview of ongoing point cloud compression standardization activities: video-based (V-PCC) and geometry-based (G-PCC) |journal=APSIPA Transactions on Signal and Information Processing |volume=9 |pages=1–17 |doi=10.1017/ATSIP.2020.12 |doi-access=free}}</ref> Three categories of point clouds were identified: category 1 for static point clouds, category 2 for dynamic point clouds, and category 3 for Lidar sequences (dynamically acquired point clouds). Two technologies were finally defined: [[G-PCC]] (Geometry-based PCC, ISO/IEC 23090 part 9)<ref>{{Cite web|title=ISO/IEC DIS 23090-9|url=https://www.iso.org/cms/render/live/en/sites/isoorg/contents/data/standard/07/89/78990.html|access-date=2020-06-07|website=ISO|language=en}}</ref> for category 1 and category 3; and [[V-PCC]] (Video-based PCC, ISO/IEC 23090 part 5)<ref>{{Cite web|title=ISO/IEC DIS 23090-5|url=https://www.iso.org/standard/73025.html|access-date=2020-10-21|website=ISO|language=en}}</ref> for category 2. The first test models were developed in October 2017, one for [[G-PCC]] (TMC13) and another one for [[V-PCC]] (TMC2). Since then, the two test models have evolved through technical contributions and collaboration, and the first version of the PCC standard specifications was expected to be finalized in 2020 as part of the ISO/IEC 23090 series on the coded representation of immersive media content.<ref>{{Cite web|title=Immersive Media Architectures {{!}} MPEG|url=https://mpeg.chiariglione.org/standards/mpeg-i/immersive-media-architectures|access-date=2020-06-07|website=mpeg.chiariglione.org}}</ref>