Main viewpoint-based panoramic video mapping method
US11301953B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2018 |
| Grant date | Apr 12, 2022 |
| Priority date | — |
| Expiry date | Jun 17, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/4038
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed are a panoramic video asymmetrical mapping method and a corresponding inverse mapping method that include mapping a spherical surface corresponding to a panoramic image or video A onto a two-dimensional image or video B, projecting the spherical surface onto an isosceles quadrangular pyramid with a square bottom plane, and further projecting the isosceles quadrangular pyramid onto a planar surface, using isometric projection on a main viewpoint region in the projection and using a relatively high sampling density to ensure that the video quality of the region of the main viewpoint is high, while using a relatively low sample density for non-main viewpoint regions so as to reduce bit rate. The panoramic video asymmetrical inverse mapping technique provides a method for mapping from a planar surface to a spherical surface, and a planar surface video may be mapped back to a spherical surface for rendering and viewing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.