Title :
Overlapping dyadic drift
Author_Institution :
Dept. of Electr. Eng., Tianjin Univ., China
Abstract :
The discrete Walsh transform is defined over a finite interval and produces undesirable blocking effects in digital image processing. It is shown how significant improvement can be obtained in eliminating the blocking problem by introducing the overlapping matrix Q and its false inverse Q¯ for dyadic drift Walsh functions. This is applied to a two-dimensional overlapping sequency filter and an overlapping dyadic differentiation operator
Keywords :
Walsh functions; matrix algebra; picture processing; two-dimensional digital filters; blocking effects; digital image processing; discrete Walsh transform; dyadic drift Walsh functions; overlapping dyadic differentiation operator; overlapping matrix Q; two-dimensional overlapping sequency filter; Digital images; Discrete transforms; Filters; Transfer functions;
Conference_Titel :
Electromagnetic Compatibility, 1989., IEEE 1989 National Symposium on
Conference_Location :
Denver, CO
DOI :
10.1109/NSEMC.1989.37189
