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Chessboard corner detection is a necessary procedure of the popular chessboard pattern-based camera calibration technique, in which the inner corners on a two-dimensional chessboard are employed as calibration markers. In this study, an automatic chessboard corner detection algorithm is presented for camera calibration. In authors’ method, an initial corner set is first obtained with an improved Hessian...
The authors present a camera calibration method for estimating the extrinsic parameters and focal length of a camera using only a single image of a planar rotation-symmetric pattern. The frontal parallel image of the pattern can preserve the rotation-symmetric pattern, causing the corresponding frieze-expansion (FE) pattern to be expressed as a low-rank matrix, which does not exist when the image...
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