Gesture-based input interface system with shadow detection
US6624833B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 2000 |
| Grant date | Sep 23, 2003 |
| Priority date | — |
| Expiry date | Apr 17, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0425
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An input interface system provides gesture-based user control of an application running on a computer by classification of user gestures in image signals. A given one of the image signals is processed to determine if it contains one of a number of designated user gestures, e.g., a point gesture, a reach gesture and a click gesture, each of the gestures being translatable to a particular control signal for controlling the application. If the image signal is determined to contain a point gesture, further processing is performed to determine position and orientation information for a pointing finger of a hand of the user and its corresponding shadow. The position and orientation information for the pointing finger and its shadow are then utilized to generate a three-dimensional pose estimate for the pointing figure in the point gesture. For example, the three-dimensional pose estimate may be in the form of a set of five parameters (X, Y, Z, &agr;, &egr;), where (X, Y, Z) denotes the position of a tip of the pointing finger in three-dimensional space, and (&agr;, &egr;) denotes the respective azimuth and elevation angles of an axis of the pointing finger. The point gesture can thus be …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.