Title :
Weighted D-filtering
Author :
Wu, Wen-Rong ; Kundu, Amlan
Author_Institution :
Microelectron. & Inf. Sci. & Technol. Res. Center, Nat. Chiao-Tung Univ., Taiwan
fDate :
4/1/1991 12:00:00 AM
Abstract :
A new type of filter which has the most desirable properties of an image smoothing filter is proposed. These properties are (1) robust smoothing efficiency, (2) edge preservation, and (3) thin-line detail preservation. The new filter, called the weighted D filter, computes its output as the median of weighted averages, instead of plain averages as used in the Hodges-Lehman D filter, of symmetrically placed order statistics. Experiments in which one particular weighting scheme is considered in detail are discussed. The experimental and comparison results verify the useful properties of the proposed filter
Keywords :
filtering and prediction theory; picture processing; edge preservation; image smoothing filter; median; robust smoothing efficiency; thin-line detail preservation; weighted D filter; weighted averages; weighting scheme; Estimation theory; Filtering; Finite impulse response filter; Image enhancement; Image processing; Image restoration; Noise robustness; Robot vision systems; Smoothing methods; Statistics;
Journal_Title :
Circuits and Systems, IEEE Transactions on
