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检索条件"任意字段=International Conference on Signal-Image Technology and Internet-Based Systems"

共 6220 条记录，以下是4621-4630 订阅

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Chaos based Information Hiding and Security

Chaos Based Information Hiding and Security

引用

international conference for internet technology and Secured Transactions (ICITST)

作者： Safwan El Assad Ecole polyethnique IETR UMR CNRS 6164 Image team Université de Nantes Nantes France

Digital chaotic generators have been investigated for many decades. However, their performances in terms of the tradeoff between security and speed, as well as their use in many systems for secure information, has not been sufficiently addressed and demonstrated. We propose a very efficient digital chaotic generator and we demonstrate its capability to build robust and fast chaos based cryptosystems, and chaos based steganography systems. Also, the proposed chaotic generator, can be used to build efficient chaos based watermarking systems.

关键词： Generators Chaotic communication Ciphers internet

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The Control System Design of Automatic Weeding Robot based on Visual Navigation

The Control System Design of Automatic Weeding Robot Based o...

引用

IEEE international conference on Robotics and Biomimetics (ROBIO)

作者： Qin, Chuanbo Du, Qiliang Tian, Lianfang Huang, Xiaogang S China Univ Technol Coll Automat Sci & Engn Guangzhou 510641 Guangdong Peoples R China S China Univ Technol Sch Mech & Automot Engn Guangzhou 510641 Guangdong Peoples R China

ISBN: (纸本)9781467321273;9781467321259

Aimming at the problem of weeding robot has a bigger radius when changing lines in paddy fields. A novel system of weeding robot based on visual navigation was proposed. Firstly, a special and compact mechanical structure of weeding robot is designed. Secondly, to control the weeding robot automatic navigation, motion control and motors driver board and realtime video capture board respectively were designed. The visual navigation algorithm implemented in TI SOC DM6446 on the video capture module. When video capture is completed, the attitude parameters of seedling centerlines were calculated and detected based on the color model and the nearest neighbor algorithm of clustering combined with Hough transform. Finally, according to the parameters, weeding robot was driven to walk along line corps and cut off weeds with the crawler mobile mechanism in stamping mode. When arriving at the end of raw crops, the weeding robot adjusts the supporting device and striding device to fulfill automatic change lines. Nonholonomic equation with parameter uncertainty was applied to the problem of robot motion control system during the navigation process. The effectiveness of the proposed approach was validated by paddy field tests according to the proposed system. And the results show that weeding robot can correctly achieve line-changed action and meets fast, accurate weeding job requirements.

关键词： Hough transforms agricultural machinery crops image colour analysis industrial robots motion control object detection robot vision uncertain systems video signal processing

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Bringing the algorithms to the data: Cloud-based benchmarking for medical image analysis

Bringing the algorithms to the data: Cloud-based benchmarkin...

引用

3rd international conference of the CLEF Initiative, CLEF 2012

作者： Hanbury, Allan Müller, Henning Langs, Georg Weber, Marc André Menze, Bjoern H. Fernandez, Tomas Salas Vienna University of Technology Austria Switzerland CIR Dep. of Radiology Medical University of Vienna Austria Radiology Department University of Heidelberg Germany ETHZ Zürich Switzerland Gencat Spain

ISBN: (纸本)9783642332463

Benchmarks have shown to be an important tool to advance science in the fields of information analysis and retrieval. Problems of running benchmarks include obtaining large amounts of data, annotating it and then distributing it to the participants of a benchmark. Distribution of the data to participants is currently mostly done via data download that can take hours for large data sets and in countries with slow internet connections even days. Sending physical hard disks was also used for distributing very large scale data sets (for example by TRECvid) but also this becomes infeasible if the data sets reach sizes of 5-10 TB. With cloud computing it is possible to make very large data sets available in a central place with limited costs. Instead of distributing the data to the participants, the participants can compute their algorithms on virtual machines of the cloud providers. This text presents reflections and ideas of a concrete project on using cloud-based benchmarking paradigms for medical image analysis and retrieval. It is planned to run two evaluation campaigns in 2013 and 2014 using the proposed technology. © 2012 Springer-Verlag.

关键词： Benchmarking

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Optical fiber-based nonlinear signal processing for Ultra-wideband radio signals

Optical fiber-based nonlinear signal processing for Ultra-wi...

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The Joint international conference on Optical internet and Next Generation Network (COIN-NGNCON)

作者： Ju Han Lee Junsu Lee You Min Chang School of Electrical and Computer Engineering University of Seoul Seoul South Korea

In this paper, we review our recent research activities on the investigation of the feasibility of using the optical fiber-based nonlinear signal processing technologies for all-optical UWB radio signal processing. It is shown that the optical fiber-based nonlinear signal processing technology can be also applied to IR-UWB-based fiber/wireless-transmission systems.

关键词： Transfer functions signal processing Probes Pulse measurements Optical fibers Optical switches Nonlinear optics

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Ontology based image retrieval

Ontology based image retrieval

引用

international conference for internet technology and Secured Transactions (ICITST)

作者： Umar Manzoor Naveed Ejaz Nadeem Akhtar Muhammad Umar M. Shoaib Khan Hafsa Umar Department of Computer Science National University of Computer and Emerging Sciences Islamabad Pakistan

image processing is one of the hottest research field and researchers from the last decade have proposed many efficient approaches for image analysis and retrieval. Semantic technologies like ontology offers promising approach to image retrieval as it tries to map the low level image features to high level ontology concepts. In this paper, we have proposed Ontology based image Retrieval (OIR) system, which uses domain specific ontology for image retrieval relevant to the user query. The user can give concept / keyword as text input or can input the image itself. Mammals domain is chosen as a test case and its ontology is developed. The OIR system is trained on Mammals dataset and tested on large number of test cases related to this domain. Experimental results show the efficiency and accuracy of the proposed system.

关键词： Semantics Knowledge based systems

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Improvement of position based watermarking using hologram

Improvement of position based watermarking using hologram

引用

6th international conference on Convergence and Hybrid Information technology, ICHIT 2012

作者： Jin, Ruichen Kim, Jongweon Department of Copyright Protection Sangmyung University Seoul Korea Republic of

ISBN: (纸本)9783642326448

In this paper, we proposed a digital watermarking scheme using the position of the random number block in the subband of the DWT (Discrete Wavelet Transform). The random number block is spread by non-axial Fourier hologram and embedded into the subband. The position of the random number block expresses the watermark information by converting the information to the binary code that means an integer number. The proposed algorithm can achieve the higher PSNR (Peak signal to Noise Ratio) than that of traditional position based watermarking because the algorithm spread the block to the size of the subband which is embedded the watermark. When the embedding intensity of the watermark is 6.0 the PSNR of the watermarked image is over 40dB. If the strength is 6.0 the algorithm can detect the position of the block under the attacks such as JPEG compression and Gaussian noise, salt and pepper noise. © 2012 Springer-Verlag.

关键词： Holograms

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international conference in Electrics, Communication and Automatic Control, ECAC 2011

International Conference in Electrics, Communication and Aut...

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international conference in Electrics, Communication and Automatic Control, ECAC 2011

ISBN: (纸本)9781441988485

The proceedings contain 225 papers. The special focus in this conference is on Electrics, Communication and Automatic Control. The topics include: Teaching Examples and Pedagogy Methods of Hydraulic Driving technology based on CDIO Theory;Low Power Designs of XOR and XNOR Standard Cells;uses and Gratifications of the Mobile E-book Users;The Application of MUSIC Algorithm for Netting Radar Target Detection;a Standing Wave-Duct System for Acoustical Property Measurement of Soundproof Materials based on the Transfer Matrix Approach;synchronizing a New Hyperchaotic System via the Backstepping Scheme;Research of the Electrohydraulic Servo System based on Expert PID Controller;Low-Complexity Semidefinite Relaxation Detector for OFDM systems in Fast Time-Varying Wireless Channels;sponsor-Directed Cluster Supply Chain Alliances and Their Collaboration Modes;A Robust Blind Video Watermarking Scheme in the 3D-DCT Domain;the Normality Testing of Quasi-Linear Regression;quantitative Evaluation of Turbulence Locus Curve’s Influence on image Characteristics in Strengthen Grinding;proportional-Integral Chaotic Motion Control of Power System based on the Stable Region;A Novel Three-Phase Sinusoidal signal Generator FPGA Design and Implementation;prediction of Chaotic Ferroresonance Time Series based on the Dynamic Fuzzy Neural Network;Gaussian SPPF based on Evolution Sampling for GPS Bearings-Only System;a Review of Microblogging Marketing based on the Complex Network Theory;the Study of Product Design Evaluation based on the Analytic Hierarchy Process;handwritten Numeral Recognition Using Support Vector Machine with Bias;an Energy-Aware Reclustering Algorithm in Heterogeneous Wireless Sensor Networks;security Scheme for Transmitting Chaotic Encrypted Evidence in Network Tunnel;orientation-Adaptive Interpolation Method for Super-Resolution image.

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2012 IEEE 16th international Symposium on Consumer Electronics, ISCE 2012

2012 IEEE 16th International Symposium on Consumer Electroni...

引用

2012 IEEE 16th international Symposium on Consumer Electronics, ISCE 2012

ISBN: (纸本)9781467313544

The proceedings contain 61 papers. The topics discussed include: agent-based optimization of emulations of network server applications in honeypots;signal integrity validation of de-embedding techniques using accurate transfer functions;a Krawtchouk moments based super resolution technique for multiframe image sequence;influence of 3DTV video contents on physiological and psychological measurements of emotional state;generation of audible sound with ultrasonic signals through the human body;design of a breath detection system with multiple remotely enhanced hand-computer interaction devices;compatible design of wireless physiological measurement system with a health management function;adaptive amplification for amplify-and-forward dual-hop cooperative systems;and design and implementation of a fall monitor system by using a 3-axis accelerometer in a smart phone.

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An improved integral proportional guidance law based on optimization and variable proportional factors

An improved integral proportional guidance law based on opti...

引用

2012 international conference on Mechatronic systems and Automation systems, MSAS 2012

作者： Yang, Guantong Tang, Shengjing Guo, Jie Zhu, Dalin Key Laboratory of Dynamics and Control of Flight Vehicle School of Aerospace Engineering Beijing Institute of Technology Beijing 100081 China

ISBN: (纸本)9783037854921

For image guided missile, in order to avoid frame collision, the maximum needed frame-angle of the seeker should not exceed the maximum available frame-angle in flight. Subjected to diameter and volume of the seeker, the required frame-angle needs to be reduced. By combination signal of frame-angle, three different improved guidance laws are discussed. By using of special developed optimization scheme, the integral proportional guidance is selected finally for its best effect. For purpose of reducing required overload of the missile, further improvement of the guidance law is generated by using variable proportional factors. The simulation results show that after using of the final improved guidance law, the maximum required frame-angle is reduced by 1. 5°, the required overload of the missile at the beginning of tracking is reduced from 5. 8 to 2. 4. According to the results, the effectiveness of the improved guidance law is verified. © (2012) Trans Tech Publications, Switzerland.

关键词： Guided missiles

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4th international conference on Networked Digital Technologies, NDT 2012

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4th international conference on Networked Digital Technologies, NDT 2012

ISBN: (纸本)9783642305665

The proceedings contain 44 papers. The special focus in this conference is on Peer-to-Peer Social Networks, Quality of Service for Networked systems, Semantic Web and Ontologies, Security and Access Contro, signal Processing and Computer Vision for Networked systems, Social Networks and Web Services. The topics include: Efficient research in community semantic overlay networks;modeling push-based live P2P streaming by stochastic activity networks;a metamodeling and transformation approach for knowledge extraction;an SQA e-learning system for agile software development;interlinking scientific authors with the LOD cloud;multi-viewpoints ontology alignment based on description logics;ontology-based database multi-representation using viewpoints and views;bypassing workflow satisfiability problem due to access control constraints;cloud-ready biometric system for mobile security access;digital image steganography;evaluation of acceleration algorithm for biometric identification;leveraging cognitive principles to improve security visualization;LPC-based narrowband speech steganography;a new algorithm for watermarking colour images using the green channel;mobile authentication using iris biometrics;nonlinear-based human activity recognition using the kernel technique;threshold-based cross layer design for video streaming over lossy channels;viewpoint invariant face detection;quality adapting of role-based interactive applications;literacy demands for the virtual-world;exploiting title-keywords relation to develop concept classifier for scientific community;recursive incentives with guided recruiting encouragement;novel applications and research problems;the use of mobile technology for citizen E-participation;a dynamic web service and business process logic composition and consistency and composing web services using profiles similarity.

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