Transformable privacy mask for video camera images
US8212872B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 2, 2004 |
| Grant date | Jul 3, 2012 |
| Priority date | — |
| Expiry date | Nov 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/695
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system including a camera, display screen and processing device. A privacy mask obscures a portion of the displayed images. The processing device transforms the privacy mask in accordance with changes in the field of view of the camera, wherein, in a first field of view, the privacy mask is defined by a plurality of vertices having coordinates (x1, y1), . . . (xn, yn), and, in a second field of view, the processing device determines transformed coordinates, (x1′, y1′), . . . (xn′, yn′), for each of the vertices based upon changes in the field of view of the camera. The privacy mask is definable by pixel rows and the processing device identifies opposing ends of a plurality of the pixel rows, each of the identified ends defining one vertex of the privacy mask. The privacy mask may also include an unmasked area completely encircled by masked area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.