Interactive whiteboards and programs
US9024901B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 2011 |
| Grant date | May 5, 2015 |
| Priority date | — |
| Expiry date | Jan 5, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N7/183
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Provided is a technique of correcting influences of optical environment to correctly recognize the color of an input object used for inputting of coordinates, and enabling automatic designation of a color to be used for drawing. A coordinate detection unit detects coordinates of an input object. Next, display light on the display plane in the vicinity of the coordinates is estimated from display data, and a correction value to remove influences of the display light is calculated. A captured image of an input object used for input operations on the display plane is extracted, and the color of the captured image is corrected with a display light correction value. Thereby, influences of the display light added to the input object are removed, enabling the original color of the input object to be identified.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.