Method for encoding normals of a 3D mesh model, method for decoding normals of a 3D mesh model, encoder and decoder
US9214042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2010 |
| Grant date | Dec 15, 2015 |
| Priority date | — |
| Expiry date | Sep 28, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T17/205
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for encoding vertex orientations, also known as normal components, of a 3D mesh model comprises a first clustering of the normal components, determining for each of the first clusters a sphere sector to which most of its elements belong, mapping normal components to a predefined sector, re-clustering the normal components in the predefined sector into second clusters, determining predictors for the second clusters and encoding a normal component by its residual, a reference to its predictor and data indicating which of said mirror mapping operations were performed. A sphere sector is obtained by dividing a sphere into m equal spherical segments and dividing each of said spherical segments into n equal sectors. The first clustering for the sector mapping and the second clustering for predictive coding result in an improved compression ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.