Image-based geometric fusion of multiple depth images using ray casting
US10818071B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2019 |
| Grant date | Oct 27, 2020 |
| Priority date | — |
| Expiry date | Jul 26, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20221
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Techniques of rendering images includes generating signed distance values (SDVs) along a ray from a specified viewpoint in terms of projected distances along that ray from given depth images. For each pixel in an image of from the perspective of the specified viewpoint, a ray is traced into the three-dimensional scene represented by the image. An iterative step is performed along the ray, obtaining in each iteration a three-dimensional world-space point p. The result is the signed distance sj as measured from depth view Dj. If the absolute value of the signed distance sj is greater than some truncation threshold parameter, the signed distance sj is replaced by a special undefined value. The defined signed-distance values are aggregated to obtain an overall signed distance s. Finally, the roots or zero set (isosurface) of the signed distance field is determined.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.