Gradient-based edge detection using nonlinear edge enhancing prefilters.
This correspondence examines the use of nonlinear edge enhancers as prefilters for edge detectors. The filters are able to convert smooth edges to step edges and suppress noise simultaneously. Thus, false alarms due to noise are minimized and edge gradient estimates tend to be large and localized. This leads to significantly improved edge maps.
Hardie
R C
RC
Dept. of Electr. Eng., Dayton Univ., OH.
Boncelet
C G
CG