Title :
Nonlinear recursive filters and applications to image processing
Author :
Tsai, Tu-Chih ; Anastassiou, Dimitris
Author_Institution :
Dept. of Electr. Eng., Columbia Univ., New York, NY, USA
Abstract :
Stability conditions for nonlinear recursive filters are established. The results are applied to nonlinear recursive filters of the form y(n)=f[x(n), y (n-1)]. In the case of image filtering by incorporating with a multi-directional scheme, a two-dimensional nonlinear recursive image filter, satisfying these conditions, with combined edge-sharpening and noise-smoothing characteristics has been developed. It can be used for image enhancement or restoration, or as a pre-processor for coding techniques
Keywords :
encoding; filtering and prediction theory; filters; picture processing; smoothing circuits; stability; coding techniques; edge-sharpening; image enhancement; image filtering; image processing; image restoration; multi-directional scheme; noise-smoothing; nonlinear recursive filters; stability conditions; Chaos; Filtering; Frequency; Image coding; Image enhancement; Image processing; Image restoration; Nonlinear filters; Power filters; Stability criteria;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.196714
