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

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A Structured Light System Encoding for an Uncalibrated 3D Reconstruction based on Evolutionary Algorithms

A Structured Light System Encoding for an Uncalibrated 3D Re...

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international IEEE conference on signal-image Technologies and internet-based System

作者： Claire Bourgeois-République Albert Dipanda Alain Koch LE21 (CNRS-UMR 6306) Université de Bourgogne Dijon France

This paper deals with 3D shape reconstruction based on a structured-light projector and two cameras using Evolutionary Algorithms (EAs). Two main problems are solved: first, the correspondence problem (also called the stereo matching problem) which allows the matching of different views of a same point in the two images, and second, the camera calibration which takes into account the camera parameters and the camera relative locations through a fundamental matrix. Concerning the correspondence problem, the main issue is the detection of the points to be matched, i.e. the points of interest (POIs). In this paper we propose a structured pattern to be projected on the object to analyse. The structured pattern is composed of triangles with different colors and different orientations. The POIs to be matched are the vertices of the triangles. Then we define an encoding method allowing the recovery of all the POIs that are detected in both images. In previous work, we showed that EAs can be used to obtain the fundamental matrix, thus providing an uncalibrated 3D reconstruction approach. However the method processed too small a number of POIs. The proposed acquisition system allows a high number of POIs to be obtained. The initial EAs are improved to use the new set of POIs. The experiments show that the proposed encoding method allows an efficient matching. In addition, accurate 3D reconstruction results are obtained and the process converges correctly.

关键词： Three-dimensional displays Cameras Biological cells image color analysis Calibration Evolutionary computation Sociology

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2013 international conference on Microtechnology and MEMS, ICMM 2013

2013 International Conference on Microtechnology and MEMS, I...

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2013 international conference on Microtechnology and MEMS, ICMM 2013

ISBN: (纸本)9783037857656

The proceedings contain 28 papers. The special focus in this conference is on Materials Science and Materials Processing technology, Automation, Control, Information technology and MEMS, Design and Manufacturing. The topics include: Device modeling of ultrathin ferroelectric capacitors;new construction materials based on automobile construction sludge;determination of electronic conductance of 100 cm2 single molten carbonate fuel cell;resistance switching in metal oxide thin films and its memory application;a novel resonant tunneling diode based on AlGaAsP/GaAs and its circuit level design;a new approach for chatter prediction in robotic milling based on signal processing in time domain;segmentation on the key structures of the fundus digital image;sensor network and the internet data transmission technology research based on GPRS;the development of intelligent mobile phone game based on android system;flexible manipulator control based on singular perturbation theory study;hybrid force-position control three fingers end effector;design of the inverted brake in substation automation system;performance studies of linear quadratic AMD controller for civil engineering;the study on continuous blood pressure information based on the pulse characteristic parameters;segmentation of target nuclei in Parkinson's disease based on fuzzy connectedness;a MapReduce clone car identification model over traffic data stream;an adaptive intra-frame refresh algorithm based on rate distortion optimization;application of Bayesian for the situation assessment of sea-battlefield;the application of semantic similarity in text classification;the research of clock traffic congestion model and synchronization technology;research on motion capture instruments in sports;a study of innovative product design for drinking cups;a study of customized innovative self-portrait product design;a study of computer aided design for the international innovative poster competition and a study of creative fig

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RGB-D tracking and reconstruction for TV broadcasts

RGB-D tracking and reconstruction for TV broadcasts

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8th international conference on Computer Vision Theory and Applications, VISAPP 2013

作者： Tykkälä, Tommi Hartikainen, Hannu Comport, Andrew I. Kämäräinen, Joni-Kristian Lappeenranta Finland Department of Media Technology Aalto University Aalto Finland CNRS-I3S University of Nice Sophia-Antipolis Nice France Department of Signal Processing Tampere University of Technology Tampere Finland

ISBN: (纸本)9789898565471

In this work, a real-time image-based camera tracking solution is developed for television broadcasting studio environments. An affordable vision-based system is proposed which can compete with expensive matchmoving systems. The system requires merely commodity hardware: a low cost RGB-D sensor and a standard laptop. The main contribution is avoiding time-evolving drift by tracking relative to a pre-recorded keyframe model. Camera tracking is defined as a registration problem between the current RGB-D measurement and the nearest keyframe. The keyframe poses contain only a small error and therefore the proposed method is virtually driftless. Camera tracking precision is compared to KinectFusion, which is a recent method for simultaneous camera tracking and 3D reconstruction. The proposed method is tested in a television broadcasting studio, where it demonstrates driftless and precise camera tracking in real-time.

关键词： Studios

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DCT sign-based robust image hashing

DCT sign-based robust image hashing

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international conference for internet technology and Secured Transactions (ICITST)

作者： Supakorn Prungsinchai Fouad Khelifi Ahmed Bouridane Faculty of Engineering and Environment Northumbria University Newcastle upon Tyne UK

This paper proposes a robust image hashing technique based on the sign of coefficients in the Discrete Cosine Transforms (DCT) domain. The idea consists of exploiting the energy compaction property of the DCT and its ability to carry information of edges and texture in DCT sign values. It has been shown that the DCT sign-based hashing technique offers an excellent robustness against signal processing operations and geometric attacks and outperforms the conventional DCT-based image hashing technique.

关键词： Transforms Robustness Tin Handheld computers

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Dynamic, Behavior-based User Profiling Using Semantic Web Technologies in a Big Data Context

Dynamic, Behavior-Based User Profiling Using Semantic Web Te...

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On The Move (OTM) Federated international conference

作者： Hoppe, Anett Roxin, Ana Nicolle, Christophe Univ Bourgogne Lab Elect Informat & Image CheckSem Grp Dijon France

ISBN: (纸本)9783642410338;9783642410338

The success of shaping the e-society is crucially dependent on how well technology adapts to the needs of each single user. A thorough understanding of one's personality, interests, and social connections facilitate the integration of ICT solutions into one's everyday life. The MindMinings project aims to build an advanced user profile, based on the automatic processing of a user's navigation traces on the Web. Given the various needs underpinned by our goal (e.g. integration of heterogeneous sources and automatic content extraction), we have selected Semantic Web technologies for their capacity to deliver machine-processable information. Indeed, we have to deal with web-based information known to be highly heterogeneous. Using descriptive languages such as OWL for managing the information contained in Web documents, we allow an automatic analysis, processing and exploitation of the related knowledge. Moreover, we use semantic technology in addition to machine learning techniques, in order to build a very expressive user profile model, including not only isolated "drops" of information, but inter-connected and machine-interpretable information. All developed methods are applied to a concrete industrial need: the analysis of user navigation on the Web to deduct patterns for content recommendation.

关键词： Big data

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Research and design a intelligent monitoring alarm system based on DSP

Research and design a intelligent monitoring alarm system ba...

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international conference on Measurement, Information and Control (MIC)

作者： Laijun Sun Jianhai Liu Tingchun Yan Key Laboratory of Electronics Engineering Heilongjiang University Harbin China

ISBN: (纸本)9781479913916

With the rapid development of digital information, human call more and more for the monitoring system which based on the multimedia technology. based on such a background, this research study and design a set of intelligent monitoring alarm system based on DSP. This system, which used the strong image processing ability of DSP and matched some control module, can monitor the current scene accurately and real-time. If it recognizes illegal sports, it can alarm at real-time. At the same time, it can send packets to the user through the internet. This efficiency and real-time of this system can satisfy the current needs of the monitoring system which based on the multimedia technology.

关键词： Monitoring Digital signal processing Real-time systems Cameras internet image color analysis Wireless communication

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Weighted feature similarity - A nonlinear combination of gradient and phase congruency for full-reference image quality assessment

Weighted feature similarity - A nonlinear combination of gra...

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4th international conference on image Processing and Communications, IPC 2012

作者： Okarma, Krzysztof Faculty of Electrical Engineering Department of Signal Processing and Multimedia Engineering West Pomeranian University of Technology Szczecin 26. Kwietnia 10 Szczecin 71-126 Poland

ISBN: (纸本)9783642323836

In the paper the modified Feature Similarity metric has been discussed which is based on the nonlinear combination of two elements being the basics of the recently developed Feature Similarity metric for full-reference image quality assessment. Nevertheless, the influence of the gradient magnitude and phase congruency, used as two main elements of the metric, on the perceived quality is not necessarily equal. For this reason some experiments have been conducted in order to propose the weighting coefficients, applied as the local exponents, increasing the rank order correlation coefficients with subjective quality evaluations. The verification of the obtained results has been conducted using 5 "state-of-the-art" benchmark databases and the obtained weighted FSIM metric's performance results are better for all of them. © 2013 Springer-Verlag.

关键词： Benchmarking

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2013 2nd international conference on Information technology and Management Innovation, ICITMI 2013

2013 2nd International Conference on Information Technology ...

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2nd international conference on Information technology and Management Innovation, ICITMI 2013

ISBN: (纸本)9783037858646

The proceedings contain 642 papers. The special focus in this conference is on Information Processing and Information Security, Information Storage and Database System, Software Engineering, Computer Networks, Modern Technologies in Communication and Navigation, Multimedia technology, Data and signal Processing, Processing image and Video, Applied and Computational Mathematics, Sensors, Detection technology and Instrument, Automation, Control and Mechatronics and Artificial Intelligence and Optimization Algorithm. The topics include: Lattice-based multi-signature schemes;implementation of RFID middleware based on hash chain;a novel RFID authentication protocol based on NTRU;roles generation for applications in RBAC model;a trust-aware access control policy for cloud data protection;information fusion based on improved D-S evidence theory;the design and realization of the single-block hash function for the short message;a secure cloud computing scaling model;multi-parameters predicting method of geo-pressure in carbonate formation;towards a computer-based information retrieval systems process;personalized web service recommendation based on user interest;towards capturing population-wide expertise via online professional social network systems;a low power design of sm4 cipher based on MUX S-box architecture;an impersonating-resilient key agreement scheme for wireless sensor networks;a review of scientific publishing platforms;an identity authentication scheme based on dynamic password technology;a model of LBS privacy protection based on collaboration;ontology-based semantic similarity measure with concept lattice;study on cloud computing clusters based on coordination method;the research on dynamics evolution patterns of online public opinion;EID system's privacy protection enhancement design;structured document model in digital community;improving frequent-term based text clustering with word belief network discussion based on document management system of chemical

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Impulse radar imaging system for concealed object detection

Impulse radar imaging system for concealed object detection

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6th international conference on Millimetre Wave and Terahertz Sensors and technology as Part of the SPIE Europe Security + Defence Meeting

作者： Podd, F. J. W. David, M. Iqbal, G. Hussain, F. Morris, D. Osakue, E. Yeow, Y. Zahir, S. Armitage, D. W. Peyton, A. J. Univ Manchester Sch Elect & Elect Engn Manchester M13 9PL Lancs England

ISBN: (纸本)9780819497697

Electromagnetic systems for imaging concealed objects at checkpoints typically employ radiation at millimetre and terahertz frequencies. These systems have been shown to be effective and provide a sufficiently high resolution image. However there are difficulties and current electromagnetic systems have limitations particularly in accurately differentiating between threat and innocuous objects based on shape, surface emissivity or reflectivity, which are indicative parameters. In addition, water has a high absorption coefficient at millimetre wavelength and terahertz frequencies, which makes it more difficult for these frequencies to image through thick damp clothing. This paper considers the potential of using ultra wideband (UWB) in the low gigahertz range. The application of this frequency band to security screening appears to be a relatively new field. The business case for implementing the UWB system has been made financially viable by the recent availability of low-cost integrated circuits operating at these frequencies. Although designed for the communication sector, these devices can perform the required UWB radar measurements as well. This paper reports the implementation of a 2 to 5 GHz bandwidth linear array scanner. The paper describes the design and fabrication of transmitter and receiver antenna arrays whose individual elements are a type of antipodal Vivaldi antenna. The antenna's frequency and angular response were simulated in CST Microwave Studio and compared with laboratory measurements. The data pre-processing methods of background subtraction and deconvolution are implemented to improve the image quality. The background subtraction method uses a reference dataset to remove antenna crosstalk and room reflections from the dataset. The deconvolution method uses a Wiener filter to "sharpen" the returned echoes which improves the resolution of the reconstructed image. The filter uses an impulse response reference dataset and a signal-to-noise paramet

关键词： Antennas Imaging systems Reflection Solids Computer aided design image restoration Reconstruction algorithms UWB radar Electromagnetism Radar imaging

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Adaptive fractal intra-frame video coding technique using parallel GPU environment

Adaptive fractal intra-frame video coding technique using pa...

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international conference on Intelligent systems and signal Processing (ISSP)

作者： M. V. Kulkarni D. B. Kulkarni Jawaharlal Nehru Technological University Hyderabad India Department of Information Technology Walchand College of Engineering Sangli India

ISBN: (纸本)9781479903160

Due to the increase in the usage of computers and internet, the demand for higher transmission speed and lower storage is increasing as well. This leads to the necessity fo r video compression. image encoding is framed upon the fractal coding method. This method is based on the assumption that image redundancy can be efficiently explored through self-block transformability. It has shown good results in producing resolution independent, high-fidelity images. The decoding process, which has low complexity, also suggests use in real time applications. The high encoding time has unfortunately produced discouraging results. In this paper, a new approach is depicted where a comparison of range blocks with the domain pool is implemented using a parallel approach.

关键词： image coding Fractals Graphics processing units Video compression Decoding Transforms Distortion measurement

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