Article
Optics
Junyao Ma, Zhe Li, Shengmei Zhao, Le Wang
Summary: In this paper, a multiple images simultaneous encryption scheme is proposed by encrypting the orbital angular momentum (OAM) holography with ghost imaging. Different images can be selectively obtained for ghost imaging by controlling the topological charge of the incident OAM light beam. The proposed encryption scheme is shown to have a higher capacity for multiple images and is more secure and robust.
Article
Optics
Zihan Gao, Minghui LI, Peixia Zheng, Jiahao Xiong, Xuan Zhang, Zikang Tang, Hong-Chao Liu
Summary: Based on computational ghost imaging (CGI), a new imaging technique, feature ghost imaging (FGI), is presented, which converts color information into distinguishable edge features in retrieved grayscale images. With the extraction of edge features by different order operators, FGI can simultaneously obtain the shape and color information of objects in a single-round detection using one single-pixel detector. Numerical simulations demonstrate the feature distinction of rainbow colors, and experimental verification of FGI's practical performance is conducted. FGI extends the function and application fields of traditional CGI while maintaining the simplicity of the experimental setup.
Article
Physics, Applied
Huiquan Li, Wanting Hou, Zhiyuan Ye, Tianyu Yuan, Shangkun Shao, Jun Xiong, Tianxi Sun, Xuepeng Sun
Summary: Ghost imaging is a technique that uses a single-pixel detector and structured illumination for compressive and lens-free image formation. The resolution in most x-ray ghost imaging schemes is limited by the unit size of structured illumination. To overcome this limitation, we introduced polycapillary optics into x-ray ghost imaging, which improved the resolution by approximately 3 times.
APPLIED PHYSICS LETTERS
(2023)
Article
Optics
Deyang Duan, Rong Zhu, Yunjie Xia
Summary: This study introduces a novel color night vision imaging method based on a ghost imaging framework and optimized coincidence measurement using wavelet transformation, which can directly produce color night vision images with high reconstruction ability.
Article
Optics
Yang Ni, Dingfu Zhou, Sheng Yuan, Xing Bai, Zhao Xu, Jie Chen, Cong Li, Xin Zhou
Summary: The novel color computational ghost imaging scheme simplifies experimental setup and shortens acquisition time, effectively removing noise and color distortion with the use of a generative adversarial network, resulting in better visual quality and realistic textures in the final images.
Article
Optics
Ming Zhao, Xue-Dian Zhang, Rong-Fu Zhang
Summary: In this study, a BM3D-based algorithm is developed to improve the performance of color computational ghost imaging. The speckle patterns of red, green, and blue are separately projected onto the object, and the single-pixel photodetector is used to record the reflected light intensity. The correlation between the light intensity sequence and the corresponding speckle patterns is then calculated based on the BM3D algorithm. Simulation results show that the developed scheme can achieve high-quality reconstruction image even at low sampling ratio.
LASER PHYSICS LETTERS
(2023)
Article
Physics, Multidisciplinary
Yang Liu, Zhan Yu, Xing Bai, Sheng Yuan, Yujie Wang, Xingyu Chen, Xinjia Li, Mingze Sun, Xin Zhou
Summary: A compressive color ghost imaging method based on pseudo-inverse matrix is proposed in this paper, which improves the quality of imaging result via post-processing the measurement matrix. The feasibility of this method is proved by numerical simulation and physical experiment, and comparisons with other typical improvement methods are conducted, showing superior performance in reconstructing color images.
Article
Optics
Hang Liu, Yani Chen, Li Zhang, Da-Hai Li, Xiaowei Li
Summary: This research proposes a deep learning method for achieving color ghost imaging through scattering media. Experimental results demonstrate that the method can efficiently reconstruct color images with rich details, even at different scattering intensities.
Article
Optics
Tong Tian, Zhe Sun, Sukyoon Oh, Christian Spielmann
Summary: This study examined the influence of hybrid speckle patterns on the contrast-to-noise ratio (CNR) and resolution in pseudo-thermal ghost imaging (PGI) for both macroscopic and microscopic objects. The results showed that using hybrid speckle patterns resulted in enhanced CNR and resolution for macroscopic objects compared to single-size speckle patterns. Additionally, the hybrid speckle pattern allowed for the retrieval of ghost images for microscopic objects with similar trends in CNR and resolution. These findings suggest that the novel hybrid speckle pattern could be used to improve ghost image quality in future PGI experiments.
Article
Optics
Xing Bai, Jinxi Li, Zhan Yu, Zhongzhuo Yang, Yujie Wang, Xingyu Chen, Sheng Yuan, Xin Zhou
Summary: This research proposes a real single-channel color image encryption method based on computational ghost imaging, which does not require decomposing the color image into grayscale images for encryption. Instead, color speckle patterns are used as the key for direct encryption. The method guarantees security and reduces the volume of key transmission.
LASER PHYSICS LETTERS
(2022)
Article
Quantum Science & Technology
Jonte R. Hance, John Rarity
Summary: The protocol presents a ghost imaging method that maintains counterfactuality, ensuring no interaction between light and the imaged object. In the infinite limit, this method allows imaging of light-sensitive objects without damaging them, while in general, it offers significant improvement in visibility and signal-to-noise ratio compared to previous protocols.
NPJ QUANTUM INFORMATION
(2021)
Article
Optics
Harry Penketh, William L. Barnes, Jacopo Bertolotti
Summary: Computational ghost imaging is a method for reconstructing images by illuminating an object with known patterns and collecting scattered light. It has been found that by choosing different illumination patterns, the reconstruction process can behave like a spatial filtering operation on the image, allowing for bypassing post-processing steps and avoiding noise amplification.
Article
Optics
Huan Cui, Jie Cao, Qun Hao, Dong Zhou, Mingyuan Tang, Kaiyu Zhang, Yingqiang Zhang
Summary: The research proposes an omnidirectional ghost imaging system that can achieve a 360 degrees omnidirectional field of view with the addition of a curved mirror, obtaining undistorted and unwrapping-free panoramic images with uniform resolution.
Article
Optics
Baolei Liu, Fan Wang, Chaohao Chen, Fei Dong, David Mcgloin
Summary: Ghost imaging captures 2D images using a point detector instead of an array sensor, offering the potential to image objects in turbid media and bypass offline processing. The self-evolving ghost imaging strategy evaluates and generates illumination patterns in real time, updating the object's image at a rapid rate. SEGI demonstrates robust imaging capabilities for static and moving objects, surpassing traditional computational ghost imaging in terms of imaging power and adaptability.
Article
Optics
Junhyeok Kim, Jisung Hwang, Jinwoo Kim, Kilyoung Ko, Eunbie Ko, Gyuseong Cho
Summary: A Bayesian denoising method was proposed to improve the quality of ghost imaging, achieving higher PSNR and SSIM with fewer measurements than traditional methods. The reconstructed image quality was significantly better, and the method proved to be robust against noise, increasing the feasibility of practical application of ghost imaging technology.
