Title :
Ladder realizations of fast subband/VQ coders with diamond support for color images
Author :
Van Dyck, R.E. ; Marshall, T.G., Jr.
Author_Institution :
Center for Comput. Aids for Ind. Productivity, Rutgers Univ., Piscataway, NJ, USA
Abstract :
A ladder implementation of a subband/vector quantization (VQ) coder is presented. The ladder realization significantly reduces the number of computations required to achieve the desired decomposition, compared to the separable system presented by R.E. Van Dyck and S.A. Rajala (see Proc. IEEE Visual Sig. Proc. Conf., p. 235-240, 1992). In this system, the low-pass subimage has a diamond orientation in order to more closely match the orientation of the human visual system. The reduction in computations is given, and coding results for color images are presented for different color spaces
Keywords :
colour graphics; filtering theory; image coding; ladder filters; quadrature mirror filters; two-dimensional digital filters; vector quantisation; color images; diamond orientation; fast subband/VQ coders; ladder implementation; low-pass subimage; vector quantization; Color; Computer industry; Digital filters; Frequency domain analysis; Humans; Image coding; Mirrors; Productivity; Signal synthesis; Visual system;
Conference_Titel :
Circuits and Systems, 1993., ISCAS '93, 1993 IEEE International Symposium on
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-1281-3
DOI :
10.1109/ISCAS.1993.393809
