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,

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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  • System and method for object tracking
  • System and method for object tracking
  • System and method for object tracking

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028]FIG. 1 is a block diagram of a configuration of a main part of a video game console 60 adapted for use with a manipulated object (prop) serving as an alternative input device.

[0029] The game console 60 constitutes a component of an overall entertainment system 110 according to the present invention which, as shown in FIG. 1 is equipped by a multiprocessor unit MPU 112 for control of the overall system 110, a main memory 114 which is used for various program operations and for storage of data, a vector calculation unit 116 for performing floating point vector calculations necessary for geometry processing, an image processor 120 for generating data based on controls from the MPU 112, and for outputting video signals to a monitor 80 (for example a CRT), a graphics interface (GIF) 112 for carrying out mediation and the like-over a transmission bus between the MPU 112 or vector calculation unit 116 and the image processor 120, an input / output port 124 for facilitating reception a...

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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.

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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Application Information

Patent Timeline
03 Feb 2005
Publication
US20050026689A1
IPC
A63F13/00; G06F3/042; G06T1/00; G06T7/00; G06T7/60
CPC
A63F2300/1012; A63F2300/1093; G06F3/0304; G06T7/606; G06F3/03545; G06T7/0042; G06T7/602; G06F3/0346
Inventors
MARKS, RICHARD L.