Abstract: Corner detection is a key point in the program of camera calibration. Aiming at the problem of SUSAN algorithm which cannot differentiate the edge and corner in the corner detection of chessboard, this paper analyzed the characters of the chessboard’s corners. A chessboard corner detection algorithm based on multi-direction restriction of symmetry and uniformity of the corners was proposed. The real corners of the chessboard were confirmed by computing the restriction of symmetry and uniformity in the result of SUSAN algorithm. Experiments show that algorithm proposed has a better validity and precision.

Key words: Chessboard corner, SUSAN algorithm, Restriction of symmetry, Restriction of uniformity