Method and apparatus for encoding a point cloud representing three-dimensional objects
US11095920B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 29, 2018 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Nov 29, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/698
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A colored 3D scene is encoded as one or two patch atlas images. Points of the 3D scene belonging a part of the space defined according to a truncated sphere center on a point of view and visible from this point of view are iteratively projected onto projection maps. At each iteration the projected part is removed from the 3D scene and the truncated sphere defining the next part of the scene to be projected is rotated. Once the entirety of the 3D scene is projected on a set of projection maps, pictures are determined within these maps. A picture, also called patch, is a cluster of depth consistent connected pixels. Patches are packed in a depth and a color atlas associated with data comprising an information relative to the rotation of the truncated sphere, so, a decoder can retrieve the projection mapping and proceed to the inverse projection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.