Polarization-based shadow detection
US8319821B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 5, 2007 |
| Grant date | Nov 27, 2012 |
| Priority date | — |
| Expiry date | Aug 27, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/90
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a first exemplary embodiment of the present invention, an automated, computerized method is provided for determining an illumination flux condition in a scene. The method comprises the steps of generating and storing a sequence of images of the scene, each one of the sequence of images comprising an array of pixels and corresponding to the scene photographed in a preselected polarization direction, different from the polarization direction of other ones of the sequence of images, determining a polarization sequence vector for at least one pixel in the array, as a function of color information for the pixel in the array, among the sequence of images; and utilizing the polarization sequence vector to determine one of a shadowed and lit illumination condition for the at least one pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.