DOI: 10.3724/SP.J.1087.2013.03548

Journal of Computer Applications (计算机应用) 2013/33:12 PP.3548-3551

Corner detection algorithm using multi-channel odd Gabor gradient autocorrelation matrix

A new corner detection algorithm based on the autocorrelation matrix of Multi-channel Odd Gabor grAdient (MOGA) was proposed to suppress the decrease of corner positioning accuracy caused by the smoothed edge. The input image was transformed by 8-channel odd Gabor filter, and then autocorrelation matrices were constructed for each pixel by Gabor gradient correlation of the pixel and its surrounding pixels. If the sum of the normalized eigenvalues of the pixel was local maxima, the pixel was labeled as a corner. Compared with the classical algorithms, such as Harris and Curvature Scale Space (CSS), the proposed algorithm increased the average rate of correct detection by 17.74%, and decreased the average rate of positioning error by 18.15%. The experimental results show that the proposed algorithm has very good detection performance, and gets higher corner detection rate and better corner positioning accuracy.

Key words:edge smoothing,positioning accuracy,corner detection,Harris algorithm,Curvature Scale Space (CSS) algorithm

ReleaseDate:2014-07-21 16:59:02