CALIBRATION METHOD - SUMITOMO RUBBER IND

Title:

CALIBRATION METHOD

Document Type and Number:

Japanese Patent JP2005270484

Kind Code:

A

Abstract:

To easily acquire a three-dimensional distance from an image taken by a camera.

This calibration method includes to take a image of a golfer 11 holding a golf club 13 and swinging it, import it in a computer 16, and calibrate position information of highlights P and Q projected on the taken image by the computer 16 to provide actual position information. A frame 20 surrounding the golfer 11 is provided on a ground constituting a swing actual space, at least two straight lines AD and BC constituting the frame 20 are recognized on the image, a conversion rate sfave converting pixel position information in the frame 20 into the actual position information is calculated using the length W2 in the swing actual space of the two straight lines AF and BC and the pixel lengths M1 and M2 on the image and and actual distance L is calculated by multiplying the conversion rate sfave by the pixel distance (a) on the image.

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Inventors:

UEDA KATSUHIKO
ONUKI MASAHIDE
SHIRAI YOSHIAKI
SHIMADA NOBUTAKA

Application Number:

JP2004090814A

Publication Date:

October 06, 2005

Filing Date:

March 26, 2004

Export Citation:

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Assignee:

SUMITOMO RUBBER IND
SHIRAI YOSHIAKI
SHIMADA NOBUTAKA

International Classes:

A63B69/36; G01B11/00; G06T1/00; G06T7/20; (IPC1-7): A63B69/36; G01B11/00; G06T1/00; G06T7/20

Attorney, Agent or Firm:

Kazumi Owada

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