Image analysis – Applications
Reexamination Certificate
2006-12-26
2006-12-26
Chawan, Sheela (Department: 2624)
Image analysis
Applications
C382S154000, C356S127000, C356S606000, C359S664000
Reexamination Certificate
active
07155030
ABSTRACT:
The invention relates to a camera calibration system and method thereof which is capable of easily performing camera calibration using a concentric circle pattern. According to the invention, a method of calibrating a camera calibrates the intrinsic parameters of the camera required to measure geometric information of an object using projection invariable characteristics of concentric circles. The method includes the steps of taking images of the calibration pattern consisting of two or more concentric circles located in the same plane and having different radius at different angles to obtain projected images calculating the central point of the projected images using a given algorithm, and calculating the principal point and focal point of camera using a nonlinear minimization algorithm based on the central point thus obtained.
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Kim Jun-Sik
Kweon In-So
Akin Gump Strauss Hauer & Feld & LLP
Chawan Sheela
Korea Advanced Institute of Science and Technology
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