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共 4342 条记录，以下是311-320 订阅

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Linear Regression-based Classifier For Audio visual Person Identification

Linear Regression-based Classifier For Audio Visual Person I...

引用

1st International conference on communications, Signal processing, and their Applications (ICCSPA)

作者： Alam, Mohammad Rafiqul Togneri, Roberto Sohel, Ferdous Bennamoun, Mohammed Naseem, Imran Univ Western Australia Sch Comp Sci & Software Engn Crawley WA 6009 Australia Univ Western Australia Sch Elect & Elect Engn Crawley WA 6009 Australia PAF Karachi Inst Econ & Technol Karachi 75190 Pakistan

ISBN: (纸本)9781467328210;9781467328203

This paper presents an audio visual (AV) person identification system using Linear Regression-based Classifier (LRC) for person identification. Class specific models are created by stacking q-dimensional speech and image vectors from the training data. The person identification task is considered a linear regression problem, i.e., a test (speech or image) feature vector is expressed as a linear combination of the (speech or image) model of the class it belongs to. The Euclidean distance between a test feature vector and the estimated response vectors for all the class specific models are used as matching scores. These matching scores from both modalities are normalized using the min-max score normalization technique and then combined using the the sum rule of fusion. The system was tested on 88 subjects from the AusTalk AV database. Experimental results show that the identification accuracy after AV fusion is higher compared to the identification accuracy of an individual modality.

关键词： audio databases audio-visual systems biometrics (access control) image classification minimax techniques personal information systems regression analysis speaker recognition visual databases

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A Dynamic Threshold System with DFT Compound Motion Analysis

A Dynamic Threshold System with DFT Compound Motion Analysis

引用

International conference on Signal processing and communications

作者： Al-Sudani, Asaad A. M. Al-Salih Univ Baghdad Dept Elect Engn Coll Engn Baghdad Iraq

ISBN: (纸本)9781424471379

This paper is concerned with investigating, experiencing, and validating a local adaptive threshold system with compound motion analysis. The motivation here is to analyze moving objects in outdoor/indoor video frames with respect to: movement detection, objects segmentation, features extraction besides DFT-based velocity computation. The underlying methodology exhibits a single correlation of the behavioral-mathematical model of the examined image sequences among identifying the image as time-varying functions applicable for processing through 2D Discrete Fourier Transform (DFT). The justification of this method has been revealed through output data, human visual inspection, histogramming;showing appreciable accuracy, lower level of noise, and shorter segmentation time in comparison with some available standard techniques. The horizon of applications of the presented method may involve security control, industry and traffic control, surveillance, and general civil and military fields.

关键词： 2D discrete Fourier transform behavioral-mathematical model compound motion analysis discrete Fourier transforms dynamic threshold system feature extraction features extraction histogram human visual inspection image motion analysis image segmentation image sequences image sequences indoor video frames industry control local adaptive threshold system movement detection object detection objects segmentation outdoor video frames security control surveillance traffic control velocity computation video signal processing

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visual SALIENCY GUIDED EXPOSURE FUSION

VISUAL SALIENCY GUIDED EXPOSURE FUSION

引用

22nd IEEE Signal processing and communications Applications conference (SIU)

作者： Mammadova, Kubra Erdem, Erkut Erdem, Aykut Hacettepe Univ Bilgisayar Muhendisligi Bolumu Cankaya Turkey

ISBN: (纸本)9781479948741

Exposure Fusion is a popular multi-exposure image fusion method which blends a set of differently exposed low dynamic range images of a scene to obtain another low dynamic range but contrast rich image. This approach carries out the integration process by using three local quality measures, namely contrast, saturation and exposedness. Our aim in this study is to extend the exposure fusion method by incorporating a novel visual saliency based quality measure. This new measure captures the parts of the scene that grabs our attention and gives more prominence to these salient regions, which is otherwise impassible 19, the previous measures in use. Our experiments show that, as compared to the exposure fusion method, our saliency-guided approach gives more vivid results and leads to sharp boundaries in the output images.

关键词： image fusion

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Fast wavelet transform domain texture synthesis

Fast wavelet transform domain texture synthesis

引用

conference on visual communications and image processing 2004

作者： Wickramanayake, DS Edirisinghe, EA Bez, HE Loughborough Univ Technol Parallelism Algorithms & Architectures Res Ctr PARC Loughborough LE11 3TU Leics England

ISBN: (纸本)0819452114

Block based texture synthesis algorithms have shown better results than others as they help to preserve the global structure. Previous research has proposed several approaches in the pixel domain, but little effort has been taken in the synthesis of texture in a multiresolution domain. We propose a multiresolution framework in which coefficient-blocks of the spatio-frequency components of the input texture are efficiently stitched together to form the corresponding components of the output texture. We propose two algorithms to this effect. In the first, we use a constant block size throughout the algorithm. In the second, we adaptively split blocks so as to use the largest possible block size in order to preserve the global structure, while maintaining the mismatched error of the overlapped boundaries below a certain error tolerance. Special consideration is given to minimization of the computational cost, throughout the algorithm designs. We show that the adaptation of the multiresolution approach results in a fast, cost-effective, flexible texture synthesis algorithm that is capable of being used in modern, bandwidth-adaptive, real-time imaging applications. A collection of regular and stochastic test textures is used to prove the effectiveness of the proposed algorithm.

关键词： texture synthesis image processing multi resolution wavelets

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Orthogonal Coded Multi-view Structured Light for Inter-view Interference Elimination

Orthogonal Coded Multi-view Structured Light for Inter-view ...

引用

IEEE International conference on visual communications and image processing (VCIP)

作者： Sun, Zaichao Qian, Guochao Peng, Zhaoyu Dai, Weiju Sun, Dongjun Zhang, Gongyuan Zhang, Nongtao Xu, Jun Wang, Ren Li, Chunlin Yunnan Elect Power Grid Co Ltd Elect Power Res Inst Kunming Yunnan Peoples R China

ISBN: (纸本)9781728180687

Rapid 3D reconstruction of dynamic scenes is very useful in 3D object structure analysis, accident avoidance for UAV, and other visual applications. Against dynamic scenes, coded structured light methods have been proposed to obtain the depth information of an object in 3D world, and most of them are based on spatial codification. A brutal truth is that two or more cameras and projectors from different viewpoints are needed to measure the dynamic scene simultaneously for rapid 3D reconstruction. However, when two traditional patterns, especially the binaries, are mutually overlapped, interference between them arises to a new challenge to 3D reconstruction. Traditional patterns can hardly be separated from each other, which surely influence the quality of the 3D reconstruction. To eliminate the interference problem, we propose a scheme of orthogonal coded multi-view structured light systems, which can obtain accurate of depth maps for a scene. Besides, we also test the stability of the orthogonal patterns by establishing three different scenes and making a comparisons to traditional patterns. New state-of-the-art results can be obtained by our scheme in the experiments.

关键词： image reconstruction

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Studying the Added Value of Computational Saliency in Objective image Quality Assessment

Studying the Added Value of Computational Saliency in Object...

引用

IEEE visual communications and image processing conference

作者： Zhang, Wei Borji, Ali Yang, Fuzheng Jiang, Ping Liu, Hantao Univ Hull Dept Comp Sci Kingston Upon Hull N Humberside England Univ Wisconsin Dept Comp Sci Milwaukee WI 53201 USA Xidian Univ Sch Telecommun Engn Xian Peoples R China

ISBN: (纸本)9781479961399

Advances in image quality assessment have shown the potential added value of including visual attention aspects in objective quality metrics. Numerous models of visual saliency are implemented and integrated in different quality metrics;however, their ability of improving a metric's performance in predicting perceived image quality is not fully investigated. In this paper, we conduct an exhaustive comparison of 20 state-of-the-art saliency models in the context of image quality assessment. Experimental results show that adding computational saliency is beneficial to quality prediction in general terms. However, the amount of performance gain that can be obtained by adding saliency in quality metrics highly depends on the saliency model and on the metric.

关键词： visual attention eye-tracking saliency model objective quality metric image quality assessment

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A Garment Suggestion Engine Based on visual Similarity 28

A Garment Suggestion Engine Based on Visual Similarity

引用

28th Signal processing and communications Applications conference (SIU)

作者： Gokturk, Mehmet Kabakli, Bilal Yogurtcuglu, Hamza Gebze Tech Univ Dept Comp Sci Gebze Turkey Modanisa AS R&D Ctr Istanbul Turkey

ISBN: (纸本)9781728172064

In this study, a product suggestion engine has been developed for an e-commerce site portfolio focusing on garment items. Traditional collaborative filtering methods usually lack applicability due to high turnover rates in product lists. Thus, by focusing on visual similarity using deep leraning technique successful results were obtained and it has been concluded that application of this technique to real live e-commerce garment site will be suitable.

关键词： deep learning e-commerce image processing

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Globally optimal wavelet-based motion estimation using interscale edge and occlusion models

Globally optimal wavelet-based motion estimation using inter...

引用

conference on visual communications and image processing 2004

作者： Sendur, L Guleryuz, OG Univ Cambridge Dept Psychiat Cambridge England

ISBN: (纸本)0819452114

We propose a non-iterative, globally optimal dense motion field estimation technique based on a multiresolutional probability model. We consider the field to be estimated in terms of its wavelet coefficients and carry out the estimation in the field's wavelet transform domain. Our approach models interscale dependencies of the wavelet coefficients and allows for smooth. edge, and occluded regions in the field. We obtain segmentations of the field and our results show that the field estimates yield accurate depictions of scene motion. The globally optimal nature of our estimation framework allows it to be applicable in scenes exhibiting large motion and in settings of ill-posed motion. Hence, our algorithms can also be used to determine accurate initializations for optical flow type estimation techniques, which use more sophisticated models but can only obtain locally optimal solutions that are heavily dependent on initial conditions. The performance is illustrated on several examples.

关键词： Motion models Motion estimation Computer programming Wavelet transforms image segmentation Wavelets Optical flow Optimization (mathematics) Probability theory Video

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visual Navigation System with Real-time image processing for Patrol Service Robot

Visual Navigation System with Real-time Image Processing for...

引用

Int Joint conference of 10th IEEE Int Conf on Trust, Security and Privacy in Computing and communications (TrustCom) / 8th IEEE Int Conf on Embedded Software and Systems (ICESS) / 6th Int Conf on Frontier of Computer Science and Technology (FCST)

作者： Asami, Kenichi Hagiwara, Hayato Komori, Mochimitsu Kyushu Inst Technol Dept Appl Sci Integrated Syst Engn 1-1 Sensui Kitakyushu Fukuoka 8048550 Japan

ISBN: (纸本)9780769546001

The visual navigation system for a mobile patrol robot using image processing by FPGA and real-time Linux is presented. The CMOS image sensor and the stepper motors driver ICs are connected to external I/O ports of the FPGA. The image processing and motor drive circuits are implemented into the reconfigurable device as original logic. The image capture circuit applies state machine and FIFO memory buffer to adjust timing for pixel data transmission. The motor drive circuit generates clock signals for steps according to the value from processor in the FPGA. The realtime device driver has been developed for the linkage between flexible hardware circuits and real-time software applications for robot vision purpose.

关键词： autonomous mobile robot patrol service robot real-time image processing visual navigation system

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Approaching real-time processing for fractal compression

Approaching real-time processing for fractal compression

引用

1997 conference on visual communications and image processing

作者： Hammerle, J Uhl, A Univ. of Salzburg (Austria)

ISBN: (纸本)0819424358

Fractal image compression is computationally expensive. Therefore speedup techniques are required to achieve time demands comparable to other compression techniques. In this paper we combine sequential and parallel techniques suitable for MIMD architectures which moves this compression scheme closer to real-time processing. The algorithms introduced are especially designed for memory-critical environments.

关键词： fractal image compression parallel algorithms MIMD architectures

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