Computation of Zernike moments in improved polar configuration

Abstract

A polar system is used to compute Zernike moments to enhance their accuracy and to improve invariance to rotation. This requires reconfiguration of pixel arrangements that are normally available in rectangular grids in the cartesian coordinate system. This study presents an improved reconfiguration model of pixel arrangements that uses nearly 27.3% less number of pixels compared to the existing model, thus enhancing the computational efficiency of the proposed method by the same percentage. The performance of the proposed model is analysed in detail, which is observed to be at par with the existing method.