The orthogonal moments defined in a circular domain, such as Zernike moments and pseudo-Zernike moments, have attracted attention due to their distinctive invariance properties. In this research, the accuracy analysis of Zernike and pseudo-Zernike moment functions has been conducted. Based on our numerical schemes to improve the accuracy of the circularly orthogonal moment functions, the simulation results show that the individual orders of Zernike and pseudo-Zernike moments represent image features uniquely. In particular, we discovered that the even orders of Zernike and pseudo-Zernike moments describe most of the image characteristics, while the contributions of odd orders are very limited.

Full text: IJEIR_1017_Final.pdf