涡流
边缘增强
旋涡
调幅
各向同性
振幅
物理
光学
数学
图像处理
计算机科学
人工智能
频率调制
图像(数学)
电信
带宽(计算)
热力学
作者
Zhongzheng Gu,Da Yin,Nie Shou-Ping,Shuai Feng,Fangjian Xing,Jun Ma,Yuan Caojin
出处
期刊:Infrared and Laser Engineering
[Shanghai Institute of Optics and Fine Mechanics]
日期:2019-01-01
卷期号:48 (6): 603015-603015
被引量:2
标识
DOI:10.3788/irla201948.0603015
摘要
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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