Open AccessDirectional and omnidirectional edge enhancement based on radial Hilbert transform of Gabor filter
Author(s) -
Wang Ke
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2015.4555
Subject(s) - omnidirectional antenna , enhanced data rates for gsm evolution , filter (signal processing) , hilbert transform , noise (video) , acoustics , mathematics , computer science , computer vision , telecommunications , physics , image (mathematics) , antenna (radio)
A directional and omnidirectional edge enhancement method is proposed based on radial Hilbert transform (RHLT) of directional Gabor filter (DGF). A new transfer function is introduced to develop a new RHLT that can be rotated to enhance edges along the specified direction. Furthermore, to increase the edge response at the specified direction and suppress noise, DGF with the centre frequency being at the direct current component, is designed to be radial Hilbert transformed.