Gesture recognition system

• US 20030076293A1
• Filed: 09/13/2002
• Published: 04/24/2003
• Est. Priority Date: 03/13/2000
• Status: Active Grant

• Current Assignee: Motuveri AB
• Original Assignee: Hans Arvid Mattsson
• Inventors: Mattsson, Hans
• Granted Patent: US 7,129,927 B2
• Time in Patent Office: Days
• US Class Current: 345/156
• CPC Class Codes: A61B 2017/00207 with hand gesture control or hand gesture recognition
• CPC Class Codes: G06F 3/017 Gesture based interaction, e.g. based on a set of recognized hand gestures interaction based on gestures traced on a digitiser G06F3/04883
• CPC Class Codes: G06V 40/20 Movements or behaviour, e.g. gesture recognition recognition of facial expressions G06V40/16

Abstract

A gesture recognition system includes: elements for detecting and generating a signal corresponding a number of markers arranged on an object, elements for processing the signal from the detecting elements, members for detecting position of the markers in the signal. The markers are divided into first and second set of markers, the first set of markers constituting a reference position and the system comprises elements for detecting movement of the second set of markers and generating a signal as a valid movement with respect to the reference position.

Claims

1. A gesture recognition system comprising:

means for detecting and generating a signal corresponding a number of markers arranged on a movable object,

means for processing said signal from said detecting means,

means for detecting position of said markers in said signal, characterised in

that said markers are divided into first and second set of markers, said first set of markers constituting a reference position and that said system comprises means for detecting movement of said second set of markers and generating a signal as a valid movement with respect to said reference position.

2. The system of claim 1, characterised in

that said detecting means is at least one camera and said markers are optically detectable markers.

3. The system of claim 1, characterised in

that said detecting means is microphones and said markers are ultrasound generating markers.

4. The system according to claim 1, characterised in

that said detecting means is radio receivers and said markers are radio transponders.

5. The system of claim 1, characterised in

that the system comprises a gesture database.

6. The system of claim 5, characterised in

that the system comprises Gesture Recognition module, which takes an input stream of marker positions and compares a research gesture to a template gestures and produces an estimation of similarity for every gesture in the database.

7. The system according to claim 1, characterised in

that the gesture recognition is accomplished by Gesture fragmentation, whereby gesture crucial points are looked for.

8. The system according to claim 1, characterised in

that the gesture recognition is accomplished ccoordinate transformations, where every gesture is entered in various places in space, under various angles, and the gesture is transformed to some normalized coordinate system.

9. The system according to claim 1, characterised in

that it comprises a Noise Filtering, which reduces the noise in marker data signal from detection means.

10. The system of claim 9, characterised in

that said filter is a median filter, in which a filtered output for a marker at a time (t₁) is taken from the middle of a sorted array build from the positions of markers in a range of times from t₁₋

n to t_1+n.

11. The system according to claim 1, characterised in

that it comprises a GUI Driver, which serves as an intermediate level between a Control unit and a GUI module.

12. The system according to claim 1, characterised in

that said object is body of or parts of body of a person.

13. A method of gesture recognition, in a system comprising:

means for detecting and generating a signal corresponding a number of markers arranged on a moving object,

means for processing said signal from said detecting means,

means for detecting position of said markers in said signal, characterised by

dividing said markers into first and second set of markers, said first set of markers constituting a reference position and that said system comprises means for detecting movement of said second set of markers and generating a signal as a valid movement with respect to said reference position.