Estimating photometric properties using a camera and a display screen
US9734433B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2015 |
| Grant date | Aug 15, 2017 |
| Priority date | — |
| Expiry date | Jul 24, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/10152
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system determines what regions in a scene captured by a camera include highly reflective (specular) surfaces. The system illuminates the scene by outputting images to a display screen such as a television screen so as to illuminate the scene from different angles. Images of the scene are captured by the camera under the different illuminations. The images are analyzed to determine which regions in the scene exhibit changes in reflected luminance that correspond to the changes in illumination, indicating a specular surface. Regions containing diffuse surfaces are also identified based on such regions exhibiting a reflected luminance that is substantially independent of the changes in illumination.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.