Highly Efficient Arithmetic Coding for Bi-Level Images.
Nobuhito Matsushiro, Osamu Asada · The Journal of The Institute of Image Information and Television Engineers · 1995
We propose a highly efficient arithmetic coding method for bi-level images.In this paper, our main interest lies in generating bi-level images suitable for arithmetic coding.Hence, a bi-level quantizer is integrated in our coder.Bi-level images are generated by the bi-level quantizer where restrictions are imposed to improve coding efficiency under less degradation of image quality.These restrictions are provided by a priori knowledge on geometrical and statistical properties.We describe our arithmetic coding method and show simulation results for bi-level images including characters, figures and pseudo gray-scale images.Although our coding method is a semi-reversible coding in that only slight distortion is introduced , our simulation results show that the coder can reduce the total amount of code by 6.6%-27.6%more than conventional arithmetic coders.