Image Analysis by Hahn Moments and a Digital Filter

Abstract

In this paper, we propose a new method of the fast and stable computation of the discrete orthogonal moments of Hahn. In this method, we have combined two main concepts. The first concept is the digital filters based on the Z-transform to accelerate the calculation process and their inverses of the Hahn moments. The second concept is the partitioning of the image into a set of blocks of fixed sizes where each block is processed independently. The first concept to accelerate the computation time and the second to improve the quality of images reconstruction. Experimental results show that both the proposed algorithms to compute Hahn moments and inverse perform better than existing methods in term of computation speed and the quality of images reconstruction.