System and method for object tracking

a technology of object tracking and system, applied in the field of computer vision systems, can solve the problems of preventing object tracking success, affecting the success of object tracking, and unable to reconstruct the position and orientation of objects,
US20050026689A1Inactive Publication Date: 2005-02-03SONY COMPUTER ENTERTAINMENT INC
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
SONY COMPUTER ENTERTAINMENT INC
Publication Date
2005-02-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

A hand-manipulated prop is picked-up via a single video camera, and the camera image is analyzed to isolate the part of the image pertaining to the object for mapping the position and orientation of the object into a three-dimensional space, wherein the three-dimensional description of the object is stored in memory and used for controlling action in a game program, such as rendering of a corresponding virtual object in a scene of a video display. Algorithms for deriving the three-dimensional descriptions for various props employ geometry processing, including area statistics, edge detection and / or color transition localization, to find the position and orientation of the prop from two-dimensional pixel data. Criteria are proposed for the selection of colors of stripes on the props which maximize separation in the two-dimensional chrominance color space, so that instead of detecting absolute colors, significant color transitions are detected. Thus, the need for calibration of the system dependent on lighting conditions which tend to affect apparent colors can be avoided.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to computer vision systems, and more particularly to a system in which an object is picked-up via an individual video camera, the camera image is analyzed to isolate the part of the image pertaining to the object, and the position and orientation of the object is mapped into a three-dimensional space. A three-dimensional description of the object is stored in memory and used for controlling action in a game program, such as rendering of a corresponding virtual object in a scene of a video display.

[0003] 2. Background of the Invention

[0004] Tracking of moving objects using digital video cameras and processing the video images for producing various displays has been known in the art. One such application, for producing an animated video version of a sporting event, has been disclosed by Segen, U.S. Pat. No. 6,072,504, the disclosure-of which is incorporated in the present specification ...

Claims

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