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High resolution reconstruction method of ghost imaging via SURF-NSML
Ye Hualong,Kang Yi,Wang Jian,Zhang Leihong,Sun Haojie,Zhang Dawei 한국물리학회 2022 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.80 No.10
To meet the visual characteristics of human eyes, high resolution imaging technology came into being. In this paper, a high resolution reconstruction method of ghost imaging via SURF-NSML is proposed. Using the image registration method of Speeded Up Robust Features (SURF) and the fusion algorithm of New Sum of Modifed Laplacian (NSML), a series of low-resolution images obtained by the ghost imaging system were registered and fused to obtain high-resolution images. This high resolution image reconstruction method does not need the use of spectroscopic devices, flters and other devices, simplifying the experimental equipment; and it is received by a bucket detector, which greatly increases the utilization of experimental equipment. By the reconstruction analysis of images from natural scenes and from the medical feld, it is proved that this method combining the device platform with the language algorithm can reconstruct the target image with better visual characteristics and richer details, which has a good promotion efect on the research of image reconstruction.
Research on Camouflaged Encryption Scheme Based on Hadamard Matrix and Ghost Imaging Algorithm
Zhang Leihong,Wang Yang,Ye Hualong,Xu Runchu,Zhang Dawei 한국광학회 2021 Current Optics and Photonics Vol.5 No.6
A camouflaged encryption scheme based on Hadamard matrix and ghost imaging is proposed. In the process of the encryption, an orthogonal matrix is used as the projection pattern of ghost imaging to improve the definition of the reconstructed images. The ciphertext of the secret image is constrained to the camouflaged image. The key of the camouflaged image is obtained by the method of sparse decomposition by principal component orthogonal basis and the constrained ciphertext. The information of the secret image is hidden into the information of the camouflaged image which can improve the security of the system. In the decryption process, the authorized user needs to extract the key of the secret image according to the obtained random sequences. The real encrypted information can be obtained. Otherwise, the obtained image is the camouflaged image. In order to verify the feasibility, security and robustness of the encryption system, binary images and gray-scale images are selected for simulation and experiment. The results show that the proposed encryption system simplifies the calculation process, and also improves the definition of the reconstructed images and the security of the encryption system.
A Ghost-Imaging System Based on a Microfluidic Chip
Kaimin Wang,Xiaoxuan Han,Hualong Ye,Zhaorui Wang,Leihong Zhang,Jiafeng Hu,Meiyong Xu,Xiangjun Xin,Dawei Zhang 한국광학회 2021 Current Optics and Photonics Vol.5 No.2
Microfluidic chip technology is a research focus in biology, chemistry, and medicine, for example. However, microfluidic chips are rarely applied in imaging, especially in ghost imaging. Thus in this work we propose a ghost-imaging system, in which we deploy a novel microfluidic chip modulator (MCM) constructed of double-layer zigzag micro pipelines. While in traditional situations a spatial light modulator (SLM) and supporting computers are required, we can get rid of active modulation devices and computers with this proposed scheme. The corresponding simulation analysis verifies good feasibility of the scheme, which can ensure the quality of data transmission and achieve convenient, fast ghost imaging passively.
Influence of Atmospheric Turbulence Channel on a Ghost-imaging Transmission System
Kaimin Wang,Zhaorui Wang,Leihong Zhang,Yi Kang,Hualong Ye,Jiafeng Hu,Jiaming Xu 한국광학회 2020 Current Optics and Photonics Vol.4 No.1
We research a system of compressed-sensing computational ghost imaging (CSCGI) based on the intensity fluctuation brought by turbulence. In this system, we used the gamma-gamma intensity-fluctuation model, which is commonly used in transmission systems, to simulate the CSCGI system. By setting proper values of the parameters such as transmission distance, refractive-index structure parameter, and sampling rates, the peak signal-to-noise ratio (PSNR) performance and bit-error rate (BER) performance are obtained to evaluate the imaging quality, which provides a theoretical model to further research the ghost-imaging algorithm.
Influence of Atmospheric Turbulence Channel on a Ghost-imaging Transmission System
Wang, Kaimin,Wang, Zhaorui,Zhang, Leihong,Kang, Yi,Ye, Hualong,Hu, Jiafeng,Xu, Jiaming Optical Society of Korea 2020 Current Optics and Photonics Vol.4 No.1
We research a system of compressed-sensing computational ghost imaging (CSCGI) based on the intensity fluctuation brought by turbulence. In this system, we used the gamma-gamma intensity-fluctuation model, which is commonly used in transmission systems, to simulate the CSCGI system. By setting proper values of the parameters such as transmission distance, refractive-index structure parameter, and sampling rates, the peak signal-to-noise ratio (PSNR) performance and bit-error rate (BER) performance are obtained to evaluate the imaging quality, which provides a theoretical model to further research the ghost-imaging algorithm.