Image capture device calibration

Number: 10038895
Published: 2018-07-31
Filed: 2013-01-15
Assignee: Disney Enterprises, Inc.
Inventors: Beardsley; Paul; Grundhoefer; Anselm; Reetz; Daniel
CPC: G01B21/042; H04N17/002; G01B11/002; G01B7/004
Verdict: Low Hardware
Source: Google Patents · FreePatentsOnline

The keeper's note

Camera calibration hardware.

Abstract

A three-dimensional coordinate position of a calibration device is determined. Further, a code is emitted to an image capture device. The code indicates the three-dimensional coordinate position of the calibration device. In addition, an image of light emitted from the calibration device is captured. The light includes the code. An image capture device three-dimensional coordinate position of the calibration device is calibrated according to the real world three-dimensional coordinate position of the calibration device indicated by the code.

Background

BACKGROUND(1) 1. Field(2) This disclosure generally relates to the field of image capture systems. More particularly, the disclosure relates to camera calibration.(3) 2. General Background(4) Camera calibration is currently utilized in a variety of areas to find the correspondence of a real world coordinate system with a coordinate system of a camera. Camera calibration is often utilized to calibrate projector-camera systems. Further, camera calibration is often utilized to calibrate multi-camera systems that track people and their interactions.(5) Current approaches to calibrating one or more cameras utilize a checkerboard target, a distinctive point such as a light emitting diode (“LED”) light source that is moved from position to position, or multiple naturally occurring points in a scene. In the approach that utilizes the checkerboard target, the one or more cameras are typically directed toward the checkerboard target that is typically held by a human. The calibration involves the human adjusting the checkerboard to be located at different ranges from the camera with different inclinations. In the approach that utilizes a moving distinctive point, the one or more cameras are typically directed toward the distinctive point that is typically held by a human. The calibration involves the human moving the distinctive point through a variety of positions. With respect to the approach that utilizes multiple naturally occurring points in a scene, the multiple naturally occurrin

Claims

1. An image capture device comprising: an image capture sensor that captures an image of light emitted from a calibration device, the light including a code that indicates a set of real world three-dimensional coordinate positions of the calibration device; and a controller that calibrates at least one intrinsic parameter and at least one extrinsic parameter according to the set of real world three-dimensional coordinate positions of the calibration device indicated by the code. 6. A system comprising: a calibration device that includes a controller and at least one light emitter, the controller determining a three-dimensional coordinate position of the calibration device, the at least one light emitter emitting a code to an image capture device, the code indicating the three-dimensional coordinate position of the calibration device; and an image capture device that includes an image capture sensor and a controller, the image capture sensor capturing an image of light emitted from a calibration device, the light including the code, the controller calibrating an image capture device three-dimensional coordinate position of the calibration device according to the real world three-dimensional coordinate position of the calibration device indicated by the code. 15. A method comprising: determining a three-dimensional coordinate position of a calibration device; emitting a code to an image capture device, the code indicating the three-dimensional coordinate position of the calibration device; capturing an image of light emitted from the calibration device, the light including the code; and calibrating an image capture device three-dimensional coordinate position of the calibration device according to the real world three-dimensional coordinate position of the calibration device indicated by the code.