Hand pattern switching apparatus
US7499569B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 23, 2005 |
| Grant date | Mar 3, 2009 |
| Priority date | — |
| Expiry date | Dec 22, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/59
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A camera for taking an image of movement of a hand, and a hand pattern switching apparatus which operates an object equipment based on the result of the image taken by the camera, having a storage unit for saving the image taken in the state that a hand does not exist in the image pickup area of the camera, as an initial image data, a differentiation unit for obtaining a difference image data between an original image data that is the image taken in the state that a hand exists in the image pickup area of the camera, and the initial image data, a luminance detection unit for obtaining an average luminance in a place close to a hand based on the image data of a place close to a hand obtained by the differentiation unit, and a processing unit for performing binary processing of the original image data by a threshold value based on the average luminance calculated by the luminance detection unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.