光学
涡流
边缘增强
数值孔径
噪音(视频)
物理
边缘检测
计算机科学
GSM演进的增强数据速率
鬼影成像
计算机视觉
人工智能
图像处理
热力学
波长
图像(数学)
作者
Lina Li,Jianshe Ma,Da Wei Sun,Zhanquan Tian,Liangcai Cao,Ping Su
出处
期刊:Optics Express
[Optica Publishing Group]
日期:2023-05-29
卷期号:31 (14): 22519-22519
被引量:7
摘要
We demonstrate a lensless imaging system with edge-enhanced imaging constructed with a Fresnel zone aperture (FZA) mask placed 3 mm away from a CMOS sensor. We propose vortex back-propagation (vortex-BP) and amplitude vortex-BP algorithms for the FZA-based lensless imaging system to remove the noise and achieve the fast reconstruction of high contrast edge enhancement. Directionally controlled anisotropic edge enhancement can be achieved with our proposed superimposed vortex-BP algorithm. With different reconstruction algorithms, the proposed amp-vortex edge-camera in this paper can achieve 2D bright filed imaging, isotropic, and directional controllable anisotropic edge-enhanced imaging with incoherent light illumination, by a single-shot captured hologram. The effect of edge detection is the same as optical edge detection, which is the re-distribution of light energy. Noise-free in-focus edge detection can be achieved by using back-propagation, without a de-noise algorithm, which is an advantage over other lensless imaging technologies. This is expected to be widely used in autonomous driving, artificial intelligence recognition in consumer electronics, etc.
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