Color scene classification by Zernike moment invariants
Yongjun Zhou, Mehmet Çelenk · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2001
Hu and Zernike moments have been widely used in many shape recognition and object classification tasks. The Hu moments are the projections of an image I(x,y) on the basis functions formed by the monomials xPyq of non-orthogonal nature. Zernike moments are computed based on a set of orthogonal polynomials over the interior of the unit circle x2+y2