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检索条件"任意字段=Conference on Optical Implementation of Information Processing"

共 1432 条记录，以下是1-10 订阅

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Attenuation-Aware Weighted optical Flow with Medium Transmission Map for Learning-based Visual Odometry in Underwater terrain 7

Attenuation-Aware Weighted Optical Flow with Medium Transmis...

引用

7th IEEE International conference on Multimedia information processing and Retrieval (MIPR)

作者： Bach, Nguyen Gia Tran, Chanh Minh Kamioka, Eiji Tan, Phan Xuan Shibaura Inst Technol Grad Sch Engn & Sci Tokyo Japan Shibaura Inst Technol Coll Engn Tokyo Japan

ISBN: (纸本)9798350351439;9798350351422

This paper addresses the challenge of improving learning-based monocular visual odometry (VO) in underwater environments by integrating principles of underwater optical imaging to manipulate optical flow estimation. Leveraging the inherent properties of underwater imaging, the novel wflow-TartanVO is introduced, enhancing the accuracy of VO systems for autonomous underwater vehicles (AUVs). The proposed method utilizes a normalized medium transmission map as a weight map to adjust the estimated optical flow for emphasizing regions with lower degradation and suppressing uncertain regions affected by underwater light scattering and absorption. wflow-TartanVO does not require fine-tuning of pre-trained VO models, thus promoting its adaptability to different environments and camera models. Evaluation of different real-world underwater datasets demonstrates the outperformance of wflow-TartanVO over baseline VO methods, as evidenced by the considerably reduced Absolute Trajectory Error (ATE). The implementation code is available at: https://***/bachzz/wflow-TartanVO

关键词： visual odometry underwater optical flow

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An optimized scheme of computer-generated hologram compression with convolutional neural networks and genetic algorithm 2

An optimized scheme of computer-generated hologram compressi...

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2nd International conference on optical Communication and optical information processing, OCOIP 2024

作者： Yao, Yuxuan Yang, Guanglin Laboratory of Signal and Information Processing School of Electronics Peking University Beijing100871 China

ISBN: (数字)9781510688995

ISBN: (纸本)9781510688988

Holography is pivotal in various applications ranging from microscopy to data storage. However, the practical implementation of holography often necessitates compression, which inevitably degrades the quality of the reconstructed images. Addressing this challenge, a scheme of computer-generated hologram compression with convolutional neural networks optimized is proposed. In this scheme, our research investigates the potential of genetic algorithm, a class of evolutionary algorithms inspired by natural selection, to optimize the initial weights of the network. Experimental results show that the scheme is feasible. © 2025 SPIE.

关键词： Convolutional neural networks

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Mismatch Correction for End-to-End Designed Phase-Encoded-Based Spectral Imaging System 32

Mismatch Correction for End-to-End Designed Phase-Encoded-Ba...

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32nd European Signal processing conference (EUSIPCO)

作者： Urrea, Sergio Gomez, Pablo Fonseca, Karen Garcia, Hans Arguello, Henry Univ Ind Santander Dept Comp Sci Bucaramanga Colombia Univ Ind Santander Dept Elect Engn Bucaramanga Colombia

ISBN: (纸本)9789464593617;9798331519773

Hyperspectral imaging provides important information about the composition of materials as a function of wavelength, which is useful for various computer vision tasks. Currently, to acquire hyperspectral images, several optical computational architectures have been developed in search of the best results in tasks such as reconstruction. However, the quality of the reconstruction of the acquired hyperspectral information is directly affected by perturbations and misalignments of the optical sensing system that are usually not considered in the system modeling. For the reconstruction of hyperspectral images, correcting the misalignment between the simulated and implemented optical systems is necessary since the acquired data, because of this phenomenon, greatly lowers their quality. Therefore, this work presents a model that predicts the behavior of the system in real scenarios and a regularized projector to match the expected measurements required by the reconstruction step. The performance of the proposed method is tested using a phase-encoded spectral imaging system on simulations and testbed implementation, with overall better results compared to the traditional method of reconstructing real hyperspectral data from the laboratory, obtaining an improvement of 4.79 [dB] compared to state-of-the-art methods.

关键词： Spectral imaging optical system Mismatch correction

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Design and Study of Passive optical Logic Element 'AND' for Application in Photonic Integrated Circuits

Design and Study of Passive Optical Logic Element 'AND' for ...

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2025 Systems of Signals Generating and processing in the Field of on Board Communications, SOSG 2025

作者： Malygin, Ivan Lukinukh, Ilya Korotkova, Elena Loginovskikh, Vitaliy Lyubin, Maxim Institute of Radioelectronics and Informational Technologies Ural Federal University Yekaterinburg Russia

ISBN: (纸本)9798331532635

The continuous increase in operating frequencies in information processing and transmission systems, as well as the development and improvement of the element base for the implementation of such systems, naturally led to the emergence of photonics as a direction using optical signals where electrical signals were traditionally used. At the same time, the emergence of new technologies and devices is associated with their high cost, which limits their distribution and implementation in modern technological processes. At this article offered to your attention is devoted to the development and study of a very simple passive optical logic element' AND', which can be used in the design of photonic integrated circuits or in the construction of optical computing devices for various purposes. © 2025 IEEE.

关键词： Photonic integrated circuits

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Laser Material processing Using Diffractive optical Elements 10

Laser Material Processing Using Diffractive Optical Elements

引用

10th International conference on information Technology and Nanotechnology, ITNT 2024

作者： Stiglbrunner, Christian Tu Wien Vienna Austria

ISBN: (纸本)9798350372939

Effective implementation of laser material processing involves achieving a predetermined distribution of power density of laser beams in selected areas on the surface of the processed material. This study explores the use of diffractive optical elements (DOEs) for laser material processing and nanostructure formation. The results underscore the effectiveness of laser technologies with adjustable spatial distribution of beam power in enhancing the strength and wear resistance of metallic materials, as well as the strength of welded joints. Additionally, the possibility of controlling the morphology of nanostructures by utilizing spatial redistribution of laser irradiation energy is discussed. © 2024 IEEE.

关键词： Diffractive optical elements

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implementation of the sliding window moving target detection algorithm for blade server

Implementation of the sliding window moving target detection...

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2024 International conference on Signal processing and Communication Security, ICSPCS 2024

作者： Zhou, Bangjian Xu, Fei Wang, Qian Xi'an Electronic Engineering Research Institute Xi'an China

ISBN: (纸本)9781510681699

Moving Target Detection(MTD) technology, as an effective means of suppressing clutter in radar signal processing, has been widely applied to various types of radars. In the development of traditional radar signal processing systems, the hardware computing resources of FPGA+DSP architecture limit the real-time processing performance of MTD, making it difficult for the radar to balance the clutter suppression effect and processing time well. In recent years, with the rapid development of GPUs, their powerful processing performance is gradually being applied to radar signal processing systems. In the process of implementing MTD, GPU relies on its powerful parallel processing ability to quickly suppress clutter and improve the radar's ability to detect moving targets. Starting from the design of the radar signal processing system, this article has completed the implementation of server-based MTD algorithm and the implementation of MTD algorithm in sliding window mode, improving the processing performance of the radar. © 2024 SPIE.

关键词： Clutter (information theory)

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An implementation method of the subject-oriented database based OLAP

An implementation method of the subject-oriented database ba...

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2023 International conference on Computer Application and information Security, ICCAIS 2023

作者： Song, Kai School of Economics and Management Qilu Normal University Shandong Jinan China

ISBN: (纸本)9781510675032

This paper analyzes the traditional implementation methods of online analytical processing (OLAP), and on this basis, puts forward the implementation scheme of the subject-oriented database based OLAP (SOLAP), and gives the description of the relevant functional model, the maintenance strategy of the topic library and the implementation method. This scheme can effectively improve the system execution efficiency and reduce the system resource occupation rate by building a topic library and saving the relevant information of user query requests. It greatly improves the working efficiency of traditional OLAP and reduces the occupation of computing resources. © 2024 SPIE.

关键词： Efficiency

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Impact of Limited Classical Channel Bandwidth on the Secret Key Rate of a CV-QKD System 24

Impact of Limited Classical Channel Bandwidth on the Secret ...

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24th International conference on Transparent optical Networks (ICTON)

作者： Silva, Nuno A. Almeida, Margarida Muga, Nelson J. Pinto, Armando N. Inst Telecomunicacoes Campus Univ Santiago P-3810193 Aveiro Portugal Univ Aveiro Dept Elect Telecommun & Informat Aveiro Portugal

ISBN: (纸本)9798350377330;9798350377323

Continuous-variable quantum key distribution (CV-QKD) can extract secret keys in an efficient and practical manner using off-the-shelf telecommunication equipment. This sets CV-QKD as a key technology for implementation in optical fiber networks already deployed in the field. Notwithstanding, the extraction of secret keys in CV-QKD requires the exchange of information, not only on a quantum channel, but also on an authenticated and public classical channel. The classical channel is required to exchange part of the coherent states to aid with the parameter estimation step to conclude on the secrecy of the extracted key, and to exchange side information essential to the reconciliation step. Here, we study the bandwidth demand of the information exchanged in the classical channel and how it can impact the extraction key rate of a CV-QKD system. The post-processing step consuming the highest bandwidth of the classical channel is the reconciliation step, due to the exchange of the side information. We consider different dimensions for the multidimensional reconciliation demanding different bandwidths on the classical channel and compute the allowed extraction key rate depending on the performance of the method, in terms of frame error

关键词： Quantum Key Distribution Quantum Continuous Variables Classical Channel Bandwidth Reconciliation information

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Frequency-flow convolution empowered by high-speed thin-film lithium niobate modulators

Frequency-flow convolution empowered by high-speed thin-film...

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2024 Asia Communications and Photonics conference, ACP 2024 and International conference on information Photonics and optical Communications, IPOC 2024

作者： Zhou, Haojun Wu, Bo Zhang, Shijing Xu, Mengyue Cai, Xinlun Dong, Jianji Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Wuhan China State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-sen University Guangzhou China

ISBN: (纸本)9798350379266

Current optical convolution architectures face challenges like limited scalability, data redundancy, and restricted processing bandwidth. We demonstrate an optical frequency-flow convolution (OFFC) core utilizing high-speed thin-film lithium niobate (LN) modulators. Our implementation achieves convolution at an 8 GHz frequency spacing with a power consumption of just 52.9 mW. © 2024 IEEE.

关键词： optical signal processing

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Design and implementation of intermediate frequency (IF) downconversion and direct radio frequency (RF) sampling in AIS receivers 5

Design and implementation of intermediate frequency (IF) dow...

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5th International conference on Signal processing and Computer Science, SPCS 2024

作者： Chen, Guohao Yu, Detao Wu, Na Yu, Zhaolei Gao, Wen Faculty of Information and Electronic Engineering Shandong Technology and Business University Yantai China Yantai Sanhang Radar Service Technology Research Institute Yantai264000 China Yan Tai En Bang Electronic Technology Co. Ltd. Yantai264006 China

ISBN: (数字)9781510686731

ISBN: (纸本)9781510686724

This paper presents a practical approach for processing AIS signals after RF direct acquisition in the ship automatic identification system. The method involves shifting the signals of the two AIS frequencies to baseband using two stages of digital downconversion (DDC). A multi-stage decimation filtering design is then employed to isolate the low-rate AIS signals of both channels. The implementation is carried out on the FPGA-JFM7K325T from Fudan Micro Company, followed by extensive repeated testing. The results demonstrate that the multi-stage filter extraction method effectively reduces hardware resource consumption and meets the design requirements, confirming the viability of this approach for enhancing AIS signal processing efficiency. © 2025 SPIE.

关键词： Signal sampling

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