Adaptive focus sweep techniques for foreground/background separation
US10621729B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2017 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Oct 11, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20028
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Adaptive focus sweep (AFS) techniques for image processing are described. For one technique, an AFS logic/module can obtain an AFS representing a scene, where the AFS is a sequence of images representing the scene that includes: (i) a first image representing the scene captured at a first focus position; and (ii) a second image representing the scene captured at a second focus position that differs from the first focus position. The first focus position can be associated with a first depth of field (DOField) that is determined based on an autofocus technique. The second focus position can be associated with a second DOField, where the second focus position is at least two DOFields away from the first focus position. The AFS logic/module can detect a foreground of the scene in the first image based on information acquired from the first and second images. Other embodiments are described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.