Title :
Designing OSED´s (order statistic edge detectors)
Author :
Restrepo, Aljredo ; Naranjo, Alejandro ; Valderrama, Magdalenu ; Daniels, Mauricio ; De la Vega, Ramiro
Author_Institution :
Univ. de Los Andes, Bogota, Colombia
Abstract :
A class of order statistic filters consisting of linear combinations of moving quasiranges has been proposed for the detection of edges in images [Restrepo et al., 1994]. Here, the distributions of quasiranges are obtained, for samples containing several outliers, and used to compute statistics such as expectations, variances and probabilities of error of the corresponding quasirange. A procedure for the choice of the threshold level is given; such a threshold level determines a minimal edge contrast to be detected under acceptable SNR conditions. We give several examples for the case of window size five
Keywords :
edge detection; error statistics; nonlinear filters; statistical analysis; OSED; SNR conditions; edge contrast; error probabilities; expectations; linear combinations; moving quasiranges; order statistic edge detector; order statistic filters; outliers; threshold level; variances; window size five; Additive white noise; Detectors; Distributed computing; Error analysis; Image edge detection; Nonlinear filters; Probability; Signal to noise ratio; Statistical distributions; Statistics;
Conference_Titel :
Image Processing, 1995. Proceedings., International Conference on
Conference_Location :
Washington, DC
Print_ISBN :
0-8186-7310-9
DOI :
10.1109/ICIP.1995.537442
