OBJECT MOTION CAPTURING SYSTEM AND METHOD

• US 20100194879A1
• Filed: 07/09/2008
• Published: 08/05/2010
• Est. Priority Date: 07/10/2007
• Status: Abandoned Application

• Current Assignee: Koninklijke Philips N.V.
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Van Acht, Victor Martinus Gerardus, Pasveer, Willem Franke
• Application Number:
  US12/667,397
• Publication Number:
  US 20100194879A1
• Time in Patent Office: Days
• US Class Current: 348/135
• CPC Class Codes: A61B 2562/0219 Inertial sensors, e.g. accelerometers, gyroscopes, tilt switches
• CPC Class Codes: A61B 5/1127 using markers
• CPC Class Codes: A63B 2220/803 Motion sensors
• CPC Class Codes: A63B 2220/806 Video cameras
• CPC Class Codes: A63B 24/0006 Computerised comparison for qualitative assessment of motion sequences or the course of a movement
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00
• CPC Class Codes: G06T 2207/10016 Video; Image sequence
• CPC Class Codes: G06T 2207/30196 Human being; Person
• CPC Class Codes: G06T 7/246 using feature-based methods, e.g. the tracking of corners or segments

Abstract

In a system and method of capturing movement of an object, a tracking device is used having an optical marker and a motion sensor providing motion data representative of the position and orientation of the tracking device. The tracking device is connected to the object, and motion of the optical marker is registered by a camera to thereby provide video data representative of the position of the tracking device. The motion data and the video data are processed in combination to determine the position and orientation of the tracking device in space over time.

Claims

1. A system of capturing movement of an object, the system comprising:

a tracking device configured to be connected to the object, the tracking device comprising;

at least one optical marker; and

at least one motion sensor providing motion data representative of the position and orientation of the tracking device;

at least one camera to register motion of the optical marker to thereby provide video data representative of the position of the tracking device; and

a linking data processor configured for processing the video data and the motion data in combination to determine the position and orientation of the tracking device in space over time.

2. The system according to claim 1, wherein the linking data processor is configured to correct the position determined from the motion data on the basis of the position determined from the video data.

3. The system according to claim 1, wherein the linking data processor is configured to correct the position determined from the video data on the basis of the position determined from the motion data.

4. The system according to claim 1, wherein the optical marker is constituted by a reflective coating on the tracking device.

5. The system according to claim 1, wherein the tracking device further comprises a timer.

6. The system according to claim 1, wherein the motion sensor comprises at least one accelerometer.

7. The system according to claim 1, wherein the motion sensor comprises at least one magnetometer.

8. The system according to claim 1, wherein the motion sensor comprises at least one gyroscope.

9. The system according to claim 1, further comprising a wireless communication link to transfer the motion signal from the motion sensor to the data processor.

10. A method of capturing movement of an object, the method comprising:

providing a tracking device comprising;

at least one optical marker; and

at least one motion sensor providing motion data representative of the position and orientation of the tracking device;

connecting the tracking device to the object;

registering motion of the optical marker by a camera to thereby provide video data representative of the position of the tracking device; and

processing the motion data and the video data in combination to determine the position and orientation of the tracking device in space over time.

11. The method according to claim 10, wherein the processing of the motion data and the video data in combination comprises correcting the position determined from the motion data on the basis of the position determined from the video data.

12. The method according to claim 10, wherein the processing of the motion data and the video data in combination comprises correcting the position determined from the video data on the basis of the position determined from the motion data.