Title :
The Effect of Median Filtering on Edge Estimation and Detection
Author :
Bovik, Alan Conrad ; Huang, Thomas S. ; Munson, David C., Jr.
Author_Institution :
Coordinated Science Laboratory, Department of Electrical and Computer Engineering, University of Illinois, Urbana, IL 61801; Department of Electrical and Computer Engineering, University of Texas, Austin, TX 78712.
fDate :
3/1/1987 12:00:00 AM
Abstract :
In this paper we consider the effect of median prefiltering on the subsequent estimation and detection of edges in digital images. Where possible, a quantitative statistical comparison is made for a number of filters defined with two-dimensional geometries; in some cases one-dimensional analyses are required to illustrate certain points. Noise images prefiltered by median filters defined with a variety of windowing geometries are used to support the analysis, and it is found that median prefiltering improves the performance of both thresholding and zero-crossing based edge detectors.
Keywords :
Digital filters; Digital images; Filtering; Geometry; Image analysis; Image edge detection; Image processing; Noise generators; Nonlinear filters; Statistics; Computer vision; edge detection; image processing; median filter; order statistics;
Journal_Title :
Pattern Analysis and Machine Intelligence, IEEE Transactions on
DOI :
10.1109/TPAMI.1987.4767894
