Displacement and tilt detection method for a portable autonomous device having an integrated image sensor and a device therefor
US7864982B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 14, 2006 |
| Grant date | Jan 4, 2011 |
| Priority date | — |
| Expiry date | Nov 4, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2200/1637
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A displacement detection method for a portable autonomous device having an integrated image sensor. The method comprises several steps. In the first step a current digital image is received from the image sensor; the current digital image depicting a background scene. Then, the position of a first area within the current digital image is chosen. Afterwards, a later digital image is received from the image sensor depicting an overlapping portion of the background scene. Then, the position of a second area matching to the first area within the later digital image is identified. After a match has been identified, the first and second areas depict approximately the same portion of the background scene. Then, a current motion vector of the portable autonomous device is calculated, according to a displacement between the first area and the second area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.