Infrared and Laser Engineering, Volume. 48, Issue 6, 603015(2019)
Advances of image edge enhancement based on vortex filtering
As an important means of image processing, the edge enhancement techniques play an important role in amplitude-contrast and phase-contrast objects imaging. The vortex filtering techniques based on radial Hilbert transform have attracted much attention because it can achieve isotropic edge enhancement. However, the classical vortex filtering causes background noise and contrast reduction due to diffraction caused by central singularities and sharp edges. In recent years, many research groups have proposed new types of vortex filters for vortex filtering side lobe suppression. In addition, the isotropic and anisotropic edge enhancement techniques based on vortex filtering have also developed rapidly. In this paper, several methods for suppressing vortex side lobes were summarized in recent years, including Laguerre Gaussian amplitude modulation, Bessel-like amplitude modulation, and Airy amplitude modulation. What′s more, from two aspects: scalar vortex filtering and vector vortex filtering, the isotropic and anisotropic edge enhancement methods and progress were reviewed.
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Gu Zhongzheng, Yin Da, Nie Shouping, Feng Shaotong, Xing Fangjian, Ma Jun, Yuan Caojin. Advances of image edge enhancement based on vortex filtering[J]. Infrared and Laser Engineering, 2019, 48(6): 603015
Category: 特约专栏-“计算成像技术与应用”
Received: Apr. 5, 2019
Accepted: May. 3, 2019
Published Online: Jul. 29, 2019
The Author Email: Zhongzheng Gu (guzhongzheng1994@163.com)