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检索条件"任意字段=2017 Conference on Design and Architectures for Signal and Image Processing, DASIP 2017"

共 891 条记录，以下是681-690 订阅

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DAMAGE DEVELOPMENT IN SIC_F/SIC COMPOSITES THROUGH MECHANICAL LOADING

DAMAGE DEVELOPMENT IN SIC<sub>F</sub>/SIC COMPOSITES THROUGH...

引用

ASME Turbo Expo: Turbine Technical conference and Exposition

作者： Bache, Martin R. Jones, J. Paul Quiney, Zak Gale, Louise Swansea Univ Inst Struct Mat Coll Engn Swansea SA1 8EN W Glam Wales Rolls Royce PLC POB 31 Derby DE24 8BJ England

ISBN: (纸本)9780791850916

Sophisticated mechanical characterisation is vital in support of a fundamental understanding of deformation in ceramic matrix composites. On the component scale, "damage tolerant" design and lifing philosophies depend upon laboratory assessments of macro-scale specimens, incorporating typical fibre architectures and matrix under representative stress-strain states. Standard SiCf/SiC processing techniques inherently introduce porosity between the individual reinforcing fibres and between woven fibre bundles. Subsequent mechanical loading (static or cyclic) may initiate cracking from these stress concentrations in addition to fibre/matrix decohesion and delamination. The localised coalescence of such damage ultimately leads to rapid failure. Proven techniques for the monitoring of damage in structural metallics, i.e. optical microscopy, potential drop systems, acoustic emission (AE) and digital image correlation (DIC), have been adapted for the characterisation of CMC's tested at room temperature. As processed SiCf/SiC panels were subjected to detailed X-ray computed tomography (XCT) inspection prior to specimen extraction and subsequent static and cyclic mechanical testing to verify their condition. DIC strain measurements, acoustic emission and resistance monitoring were performed and correlated to monitor the onset of damage during loading, followed by intermittent XCT inspections throughout the course of selected tests.

关键词： image correlation

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2nd International conference on Circuits, Controls, and Communications, CCUBE 2017 - Proceedings

2nd International Conference on Circuits, Controls, and Comm...

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2nd International conference on Circuits, Controls, and Communications, CCUBE 2017

ISBN: (纸本)9781538606155

The proceedings contain 45 papers. The topics discussed include: wavelet based clutter reduction of GPR data;synthesis of a thinned planar antenna array with suppressed peak side lobe level using modified binary coded genetic algorithm (MBC-GA);performance comparison of 8 bit & 32 bit logarithmic barrel shifter using Fredkin & SCRL gates;tri-level high capacitive load clock driver design for charge coupled devices;design of a state-machine based genomic simulator and development of a system for prediction of rheumatoid arthritis (RA) using signal processing techniques;implementation of 32-bit RISC processors without interlocked pipelining on Artix-7 FPGA board;an optimized reversible signed comparator;segmentation of lung vessels using radon transform;single image super resolution using sub-band coder and adaptive filtering;performance analysis of non uniform linear arrays using MUSIC algorithm for under water communication;spread spectrum based encrypted audio steganographic system with improved security;area efficient architecture of hyperbolic functions for high frequency applications;FIR filter implementation on FPGA using MCM design technique;and implementation of lightweight cryptographic algorithms in FPGA.

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Proceedings - International conference on Trends in Electronics and Informatics, ICEI 2017

Proceedings - International Conference on Trends in Electron...

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2017 International conference on Trends in Electronics and Informatics, ICEI 2017

ISBN: (纸本)9781509042579

The proceedings contain 226 papers. The topics discussed include: parallel hierarchical subspace clustering for segmenting large text corpuses;design of error normalized LMS adaptive filter for EEG signal with eye blink & PLI artefacts;species recognition using audio processing algorithm;a novel study on color image denoising and comparison of various state-of-the-art methods;study of back-propagation and self organizing maps for robotic motion control: a survey;study and implementation of IoT based smart healthcare system;implementation of re-encryption based security mechanism to authenticate shared access in cloud computing;traffic information verification techniques in VANET: a review;mitigating techniques of black hole attack in MANET: a review;TURBO coded OFDM performance analysis for digital video broadcasting;an improved digital watermarking technique based on 5-DWT,FFT & SVD;an improved image steganography based on 2- DWT-FFT-SVD on YCBCR color space;FPGA reconfiguration using UART and SPI Flash;AODV modification to address link breakage issue : a review;an efficient channel selection based on task classification;and novel ABC based training algorithm for ovarian cancer detection using neural network.

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Energy-Efficient Synchronous Counter design with Minimum Hardware Overhead 6

Energy-Efficient Synchronous Counter Design with Minimum Har...

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IEEE International conference on Communication and signal processing (ICCSP)

作者： Katreepalli, Raghava Haniotakis, Themistoklis Southern Illinois Univ Carbondale Dept Elect & Comp Engn Carbondale IL 62901 USA

ISBN: (纸本)9781509038008

The Performance of any VLSI circuit depends on its design architecture, which optimizes power and provides high reliability. To design any circuit with low power, power optimization of circuit at different levels is needed. Most of the system level architectures consists of sequential circuits, design of these circuits plays an pivotal role in reducing overall energy of the system. Counters are basic building blocks in many VLSI applications such as timers, memories, ADCs/DACs, frequency dividers etc. It is observed that design of counters has power overhead because of requirement of high power consumption for the clock signal distribution and undesired activity of flip-flops due to presence of clocks. In this paper we propose an energy efficient design of synchronous counters that reduces the power consumption due to clock distribution for different flip-flops and offers high reliability. The proposed counter design is evaluated and anlayzed in terms of energy in a standard 45nm CMOS technology in CADENCE. The proposed counter design has lower energy requirement than existing counter architectures and the energy reduction is more significant for wide-bit counters.

关键词： counter power conumption energy clock power

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A Spread-Spectrum Watermarking Scheme with Adaptive Embedding Strength and PSNR Guarantee 12

A Spread-Spectrum Watermarking Scheme with Adaptive Embeddin...

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12th IEEE International conference on Anti-counterfeiting, Security, and Identification (ASID)

作者： Huang, Ying Guan, Hu Niu, Baoning Zhang, Shuwu Taiyuan Univ Technol Coll Informat & Comp Taiyuan 030024 Shanxi Peoples R China Chinese Acad Sci Inst Automat Beijing 100190 Peoples R China

ISBN: (纸本)9781538660638

Watermarking is a crucial technique for copyright protection of digital images. The most common spread-spectrum watermarking schemes suffer from host signal interference (HSI), which degrades the decode performance. Although this condition can be improved by increasing the embedding strength, it might make the embedded watermark perceptible. This paper solves these problems by proposing a novel blind spread-spectrum watermarking scheme with adaptive embedding strength (SSAES). A notion called the error threshold is introduced to analyze how HSI and distortions compromise robustness and imperceptibility of the spread-spectrum scheme, which motivates us to come up with our solutions. SSAES is HSI free by utilizing the priori knowledge of HSI and features an adjustable embedding strength derived from a theoretical equation related to peak signal-to-noise ratio (PSNR), which strikes a perfect balance between robustness and imperceptibility. SSAES can be easily applied to other watermarking frameworks. The experimental results demonstrate our scheme can ensure that the PSNR of each watermarked image is more than 40 dB and is superior to the state of the art method under the same watermarking framework in any simulation scenarios include image processing attacks and geometric attacks.

关键词： image watermarking spread-spectrum adaptive copyright protection

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Estimating the Number of Endmembers in Hyperspectral imagery Using Accumulated Convex Hull Vertex and Similarity Measure 23

Estimating the Number of Endmembers in Hyperspectral Imagery...

引用

conference on image and signal processing for Remote Sensing XXIII

作者： Wu, Kang-Pei Teng, Hung-Chao Wu, Jee-Cheng Tungnan Univ Dept Construct & Spatial Design 152Sec 3Beishen Rd New Taipei 222 Taiwan Natl Ilan Univ Dept Civil Engn 1Sec 1Sheng Lung Rd I Lan City 260 Taiwan

ISBN: (数字)9781510613195

ISBN: (纸本)9781510613195;9781510613188

The key to successful spectral un-mixing is indicating number of endmembers and their corresponding spectral signatures. Nevertheless, correctly estimate the number of endmembers without a priori knowledge is a very hard task because pixels in a hyperspectral image are always contain a mixture of the several reflected spectra. Currently, Noise Whitened Harsanyi, Farrand, and Chang (NWHFC) and hyperspectral signal subspace identification by minimum error (HySime) are two well-known methods for estimating the number of endmembers. However, in practice, because NWHFC requires fixing the false-alarm probability and HySime needs estimate noise of each spectral band, these two methods may not only ignore small objects but also can't identify endmembers. In this paper, assuming endmembers in a hyperspectral image can be modeled by convex geometry. We propose a threestage process to estimate the number of endmembers. At the first stage, principal component (PC) is used to transform original image to low-dimensional components for speeding up algorithm execution. At second stage, successive volume maximization (SVMAX) is used to obtain vertex using convex properties. At the third stage, spectral angle mapper (SAM) is used to compute similarity measures among vertex, and minimum SAM value represents vertex separation. Repeat the second and third stages by increasing transformed component dimensions until reach a predefined criteria. The number of endmembers of the image is the vertex with maximum of the vertex separations Finally, the proposed method is applied to synthetic and real AVIRIS and HYDICE hyperspectral data sets for estimating the number of endmembers. The results demonstrate that the proposed method can be used to estimate more reasonable and precise number of endmembers than the two published methods.

关键词： Spectral unmixing endmember convex optimization similarity measure

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DENSE OPTICAL FLOW VARIATION BASED 3D FACE RECONSTRUCTION FROM MONOCULAR VIDEO 25

DENSE OPTICAL FLOW VARIATION BASED 3D FACE RECONSTRUCTION FR...

引用

25th IEEE International conference on image processing (ICIP)

作者： Wang, Shan Shen, Xukun Liu, Jiaqing Beihang Univ State Key Lab Virtual Real Technol & Syst Beijing Peoples R China Beihang Univ Sch New Media Art & Design Beijing Peoples R China

ISBN: (纸本)9781479970612

This paper presents a method for reconstructing 3D face expressions from monocular video sequences. Unlike previous approaches we don't require any prior face models, nor a large collection of images with diverse variation of poses and illuminations. Instead, we leverage a monocular video sequence without any restrictions. We formulate the 3D face reconstruction as an energy minimization problem integrated with dense optical flow variation, as rigid as possible(ARAP) constraint, spatial and temporal constraints. This paper offers the first dense optical flow variational approach to the problem of 3D reconstruction of non-rigid face expressions from a monocular video. Dense optical flow variation cost substitutes for photo consistency cost to enhance the reconstruction of exaggerated expressions. A generic 3D face template mesh and a simple 3D warping algorithm allow us to reconstruct a true 3D face mesh, relax the constraints of diverse views or illuminations and also avoid the dependency of the quality of prior face models, such as the facial expressions or face races varieties limitation. Finally, we use a per-pixel shape-from shading(SFS) algorithm to estimate the fine-scale geometry details such as wrinkles to further improve the reconstruction fidelity. Given unconstrained monocular RGB videos, our method reconstructs wrinkle-level 3D face model, without the need for any prior models or diverse capture conditions.

关键词： 3D face reconstruction dense optical flow monocular video

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image Filtering Enhancement 9th

Image Filtering Enhancement

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9th International conference on Swarm Intelligence (ICSI)

作者： Guo, Zhen Pan, Hang Chen, Jinlong Chen, Xianjun Guilin Univ Elect Technol Guangxi Key Lab Cryptog & Informat Secur Guilin 541004 Guangxi Peoples R China Guilin Univ Elect Technol Key Lab Intelligent Proc Comp Image & Graph Guilin 541004 Guangxi Peoples R China Haikou Coll Econ Informat Engn Sch Haikou 571127 Hainan Peoples R China

ISBN: (纸本)9783319938189;9783319938172

With the development of science and technology, mankind has entered the information age. image has become the main source of human access to information. However, in the actual process of image signal transmission, the loss and damage of data packet are inevitable due to the physical defects of the channel, which lead to a serious decline in the quality of the video stream. So it is necessary and even urgent now to do some research work on image enhancement technology. In this paper, the image enhancement algorithms that are commonly used, such as bilateral filtering algorithm, homomorphic filtering algorithm, are analyzed in image processing. In the design of the image enhancement, the best modeling and design schemes are chosen according to the comparison. The experimental results demonstrate that the bilateral filtering algorithm can effectively maintain the details of the image edges and make the image more smooth;the homomorphic filtering algorithm can effectively adjust the image gray range, so that the image details on the image area can be increased, and the algorithm can handle the image with inhomogeneous intensity. This work will lay a good foundation of further research.

关键词： image enhancement Homomorphic filtering Bilateral filtering

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2D optical accelerometer using POF array and image detection 25

2D optical accelerometer using POF array and image detection

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25th International conference on Plastic Optical Fibres, POF 2016

作者： Serrão, R. Antunes, P. André, P.S. Department of Electrical and Computer Engineering Instituto Superior Técnico University of Lisboa Lisboa Portugal Instituto de Telecomunicações Physics Department I3N University of Aveiro Aveiro Portugal Department of Electrical and Computer Engineering Instituto de Telecomunicações Instituto Superior Técnico University of Lisboa Lisboa Portugal

ISBN: (纸本)9781854494085

In this work we propose and demonstrate the development of an optical 2D accelerometer based on plastic optical fiber array using image detection for data analysis. The design is based in a light emitting diode coupled to a single POF working as a cantilever with an attached inertial mass. The output optical signal at the cantilever fiber is projected into a fiber array and acquired using a webcam. The use of image processing analysis allows the integration of the signal intensity in each fiber core and the estimation of the applied acceleration. © The Author(s) 2017.

关键词： Structural health monitoring

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ACM International conference Proceeding Series

ACM International Conference Proceeding Series

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2017 Mediterranean Symposium on Smart City Application, SCAMS 2017

ISBN: (纸本)9781450352116

The proceedings contain 30 papers. The topics discussed include: towards a system for integrating heterogeneous health records;applying text mining to predict learners' cognitive engagement;an adult learner's knowledge model based on ontologies and rule reasoning;big data architecture for decision making in protocols and medications assignment;3D GIS for smart cities;cloud-based integrated information system for medical offices;ICT assessment axes for the smart city approach;XACML policies into Mongodb for privacy access control;implementation of the algorithms of ECG signal processing on embedded architectures: a survey;perception of a new framework for detecting phishing web pages;TV home-box based IoT for smart home;smart adaptive learning based on Moodle platform;SVG image comparison using commands of element path;wireless sensors networks challenges;energy dynamic MANET on-demand with error rate QOS (e-DYMO-Er) routing protocol for wireless sensor networks;towards a big data analytics framework for smart cities;remote controlled human navigational assistance for the blind using intelligent computing;study of the impact of load and density on the behavior of routing protocols AODV and DSDV in the VANET networks;modeling of piezoelectric sensors for feat heart rate signal;first Africa and morocco NB-IoT experimental results and deployment scenario: new approach to improve main 5G KPIs for smart water management;survey on nature inspired algorithm for smart city applications;and detection of driver drowsiness based on the Viola & Jones method and logistic regression analysis.

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