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2014 22nd European Signal Processing Conference (EUSIPCO)最新文献

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Locally linear embedding-based prediction for 3D holoscopic image coding using HEVC 基于局部线性嵌入的HEVC三维全息图像编码预测
2014 22nd European Signal Processing Conference (EUSIPCO) Pub Date : 2014-11-13 DOI: 10.5281/ZENODO.44040
Luís F. R. Lucas, Caroline Conti, P. Nunes, Luís Ducla Soares, Nuno M. M. Rodrigues, C. Pagliari, E. Silva, S. Faria
{"title":"Locally linear embedding-based prediction for 3D holoscopic image coding using HEVC","authors":"Luís F. R. Lucas, Caroline Conti, P. Nunes, Luís Ducla Soares, Nuno M. M. Rodrigues, C. Pagliari, E. Silva, S. Faria","doi":"10.5281/ZENODO.44040","DOIUrl":"https://doi.org/10.5281/ZENODO.44040","url":null,"abstract":"Holoscopic imaging is a prospective acquisition and display solution for providing true 3D content and fatigue-free 3D visualization. However, efficient coding schemes for this particular type of content are needed to enable proper storage and delivery of the large amount of data involved in these systems. Therefore, this paper proposes an alternative HEVC-based coding scheme for efficient representation of holoscopic images. In this scheme, some directional intra prediction modes of the HEVC are replaced by a more efficient prediction framework based on locally linear embedding techniques. Experimental results show the advantage of the proposed prediction for 3D holoscopic image coding, compared to the reference HEVC standard as well as previously presented approaches in this field.","PeriodicalId":198408,"journal":{"name":"2014 22nd European Signal Processing Conference (EUSIPCO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131614324","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 52
A new approach to wavelet entropy: Application to postural signals 小波熵的一种新方法:在姿态信号中的应用
2014 22nd European Signal Processing Conference (EUSIPCO) Pub Date : 2014-11-13 DOI: 10.5281/ZENODO.43981
C. Franco, P. Gumery, A. Fleury, N. Vuillerme
{"title":"A new approach to wavelet entropy: Application to postural signals","authors":"C. Franco, P. Gumery, A. Fleury, N. Vuillerme","doi":"10.5281/ZENODO.43981","DOIUrl":"https://doi.org/10.5281/ZENODO.43981","url":null,"abstract":"This study proposes a new approach for quantifying complexity of physiological signals characterized by a spectral distribution in modes. Our approach is inspired by wavelet entropy but based on a modal representation: Synchrosqueezing transform. It is calculated for each time sample within the cone of influence of the decomposition. This index is first validated and discussed on simulated multicomponent signals. Finally, it is applied to assess postural control and ability at using all the sensory resources available. Results show significant differences in our index following an induced change in sensory conditions whereas a conventional approach fails. This index may constitute a promising tool for detection of postural troubles.","PeriodicalId":198408,"journal":{"name":"2014 22nd European Signal Processing Conference (EUSIPCO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121310014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Alternating maximization algorithm for the broadcast beamforming 广播波束形成的交替最大化算法
2014 22nd European Signal Processing Conference (EUSIPCO) Pub Date : 2014-11-13 DOI: 10.5281/ZENODO.43909
Ozlem Tugfe Demir, T. E. Tuncer
{"title":"Alternating maximization algorithm for the broadcast beamforming","authors":"Ozlem Tugfe Demir, T. E. Tuncer","doi":"10.5281/ZENODO.43909","DOIUrl":"https://doi.org/10.5281/ZENODO.43909","url":null,"abstract":"Semidefinite relaxation (SDR) is a powerful approach to solve nonconvex optimization problems involving rank condition. However its performance becomes unacceptable for certain cases. In this paper, a nonconvex equivalent formulation without the rank condition is presented for the broadcast beamforming problem. This new formulation is exploited to obtain an alternating optimization method which is shown to converge to the local optimum rank one solution. Proposed method opens up new possibilities in different applications. Simulations show that the new method is very effective and can attain global optimum especially when the number of users is low.","PeriodicalId":198408,"journal":{"name":"2014 22nd European Signal Processing Conference (EUSIPCO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125231315","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 25
Parallel performance and energy efficiency of modern video encoders on multithreaded architectures 现代视频编码器在多线程架构下的并行性能和能效
2014 22nd European Signal Processing Conference (EUSIPCO) Pub Date : 2014-11-13 DOI: 10.5281/ZENODO.43805
Rafael Rodríguez-Sánchez, Francisco D. Igual, José Luis Martínez, R. Mayo, E. S. Quintana‐Ortí
{"title":"Parallel performance and energy efficiency of modern video encoders on multithreaded architectures","authors":"Rafael Rodríguez-Sánchez, Francisco D. Igual, José Luis Martínez, R. Mayo, E. S. Quintana‐Ortí","doi":"10.5281/ZENODO.43805","DOIUrl":"https://doi.org/10.5281/ZENODO.43805","url":null,"abstract":"In this paper we evaluate four mainstream video encoders: H.264/MPEG-4 Advanced Video Coding, Google's VP8, High Efficiency Video Coding, and Google's VP9, studying conventional figures-of-merit such as performance in terms of encoded frames per second, and encoding efficiency in both PSNR and bit-rate of the encoded video sequences. Additionally, two platforms equipped with a large number of cores, representative of current multicore architectures for high-end servers, and equipped with a wattmeter allow us to assess the quality of these video encoders in terms of parallel scalability and energy consumption, which is well-founded given the significant levels of thread concurrency and the impact of the power wall in todays' multicore processors.","PeriodicalId":198408,"journal":{"name":"2014 22nd European Signal Processing Conference (EUSIPCO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126419956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Optimal quantization and power allocation for energy-based distributed sensor detection 基于能量的分布式传感器检测的最优量化和功率分配
2014 22nd European Signal Processing Conference (EUSIPCO) Pub Date : 2014-11-13 DOI: 10.5281/ZENODO.43947
Edmond Nurellari, D. McLernon, M. Ghogho, S. Aldalahmeh
{"title":"Optimal quantization and power allocation for energy-based distributed sensor detection","authors":"Edmond Nurellari, D. McLernon, M. Ghogho, S. Aldalahmeh","doi":"10.5281/ZENODO.43947","DOIUrl":"https://doi.org/10.5281/ZENODO.43947","url":null,"abstract":"We consider the decentralized detection of an unknown deterministic signal in a spatially uncorrelated distributed wireless sensor network. N samples from the signal of interest are gathered by each of the M spatially distributed sensors, and the energy is estimated by each sensor. The sensors send their quantized information over orthogonal channels to the fusion center (FC) which linearly combines them and makes a final decision. We show how by maximizing the modified deflection coefficient we can calculate the optimal transmit power allocation for each sensor and the optimal number of quantization bits to match the channel capacity.","PeriodicalId":198408,"journal":{"name":"2014 22nd European Signal Processing Conference (EUSIPCO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114870494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Robust linear regression analysis - The greedy way 鲁棒线性回归分析-贪婪的方式
2014 22nd European Signal Processing Conference (EUSIPCO) Pub Date : 2014-11-13 DOI: 10.5281/ZENODO.44146
G. Papageorgiou, P. Bouboulis, S. Theodoridis, K. Themelis
{"title":"Robust linear regression analysis - The greedy way","authors":"G. Papageorgiou, P. Bouboulis, S. Theodoridis, K. Themelis","doi":"10.5281/ZENODO.44146","DOIUrl":"https://doi.org/10.5281/ZENODO.44146","url":null,"abstract":"In this paper, the task of robust estimation in the presence of outliers is presented. Outliers are explicitly modeled by employing sparsity arguments. A novel efficient algorithm, based on the greedy Orthogonal Matching Pursuit (OMP) scheme, is derived. Theoretical results concerning the recovery of the solution as well as simulation experiments, which verify the comparative advantages of the new technique, are discussed.","PeriodicalId":198408,"journal":{"name":"2014 22nd European Signal Processing Conference (EUSIPCO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114457553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
On the application of AAM-based systems in face recognition 基于aam的系统在人脸识别中的应用
2014 22nd European Signal Processing Conference (EUSIPCO) Pub Date : 2014-11-13 DOI: 10.5281/ZENODO.44192
M. A. Khan, C. Xydeas, Hassan Ahmed
{"title":"On the application of AAM-based systems in face recognition","authors":"M. A. Khan, C. Xydeas, Hassan Ahmed","doi":"10.5281/ZENODO.44192","DOIUrl":"https://doi.org/10.5281/ZENODO.44192","url":null,"abstract":"The presence of significant levels of signal variability in face-portrait type of images, due to differences in illumination, pose and expression, is generally been accepted as having an adverse effect on the overall performance of i) face modeling and synthesis (FM/S) and also on ii) face recognition (FR) systems. Furthermore, the dependency on such input data variability and thus the sensitivity, with respect to face synthesis performance, of Active Appearance Modeling (AAM), is also well understood. As a result, the Multi-Model Active Appearance Model (MM-AAM) technique [1] has been developed and shown to possess a superior face synthesis performance than AAM. This paper considers the applicability in FR applications of both AAM and MM-AAM face modeling and synthesis approaches. Thus, a MM-AAM methodology has been devised that is tailored to operate successfully within the context of face recognition. Experimental results show FR-MM-AAM to be significantly superior to conventional FR-AAM.","PeriodicalId":198408,"journal":{"name":"2014 22nd European Signal Processing Conference (EUSIPCO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122147353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
How to localize ten microphones in one finger snap 如何在一个弹指间定位十个麦克风
2014 22nd European Signal Processing Conference (EUSIPCO) Pub Date : 2014-11-13 DOI: 10.5281/ZENODO.44162
Ivan Dokmanić, L. Daudet, M. Vetterli
{"title":"How to localize ten microphones in one finger snap","authors":"Ivan Dokmanić, L. Daudet, M. Vetterli","doi":"10.5281/ZENODO.44162","DOIUrl":"https://doi.org/10.5281/ZENODO.44162","url":null,"abstract":"A compelling method to calibrate the positions of microphones in an array is with sources at unknown locations. Remarkably, it is possible to reconstruct the locations of both the sources and the receivers, if their number is larger than some prescribed minimum [1, 2]. Existing methods, based on times of arrival or time differences of arrival, only exploit the direct paths between the sources and the receivers. In this proof-of-concept paper, we observe that by placing the whole setup inside a room, we can reduce the number of sources required for calibration. Moreover, our technique allows us to compute the absolute position of the microphone array in the room, as opposed to knowing it up to a rigid transformation or reflection. The key observation is that echoes correspond to virtual sources that we get “for free”. This enables endeavors such as calibrating the array using only a single source.","PeriodicalId":198408,"journal":{"name":"2014 22nd European Signal Processing Conference (EUSIPCO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132317958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 23
Compressed spectrum sensing in the presence of interference: Comparison of sparse recovery strategies 存在干扰的压缩频谱感知:稀疏恢复策略的比较
2014 22nd European Signal Processing Conference (EUSIPCO) Pub Date : 2014-11-13 DOI: 10.5281/ZENODO.43898
E. Lagunas, M. Nájar
{"title":"Compressed spectrum sensing in the presence of interference: Comparison of sparse recovery strategies","authors":"E. Lagunas, M. Nájar","doi":"10.5281/ZENODO.43898","DOIUrl":"https://doi.org/10.5281/ZENODO.43898","url":null,"abstract":"Existing approaches to Compressive Sensing (CS) of sparse spectrum has thus far assumed models contaminated with noise (either bounded noise or Gaussian with known power). In practical Cognitive Radio (CR) networks, primary users must be detected even in the presence of low-regulated transmissions from unlicensed systems, which cannot be taken into account in the CS model because of their non-regulated nature. In [1], the authors proposed an overcomplete dictionary that contains tuned spectral shapes of the primary user to sparsely represent the primary users' spectral support, thus allowing all frequency location hypothesis to be jointly evaluated in a global unified optimization framework. Extraction of the primary user frequency locations is then performed based on sparse signal recovery algorithms. Here, we compare different sparse reconstruction strategies and we show through simulation results the link between the interference rejection capabilities and the positive semidefinite character of the residual autocorrelation matrix.","PeriodicalId":198408,"journal":{"name":"2014 22nd European Signal Processing Conference (EUSIPCO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130331548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Bone microstructure reconstructions from few projections with stochastic nonlinear diffusion 基于随机非线性扩散的少量投影重建骨微结构
2014 22nd European Signal Processing Conference (EUSIPCO) Pub Date : 2014-11-13 DOI: 10.5281/ZENODO.44155
L. Wang, B. Sixou, F. Peyrin
{"title":"Bone microstructure reconstructions from few projections with stochastic nonlinear diffusion","authors":"L. Wang, B. Sixou, F. Peyrin","doi":"10.5281/ZENODO.44155","DOIUrl":"https://doi.org/10.5281/ZENODO.44155","url":null,"abstract":"In this work, we use a stochastic diffusion equation for the reconstruction of binary tomography cross-sections obtained from a small number of projections. The aim of this new method is to escape from local minima by changing the shape of the boundaries of the image. First, an initial binary image is reconstructed with a deterministic Total Variation regularization method, and then this binary reconstructed image is refined by a stochastic partial differential equation with singular diffusivity and a gradient dependent noise. This method is tested on a 256 × 256 experimental micro-CT trabecular bone image with different additive Gaussian noises. The reconstruction images are clearly improved.","PeriodicalId":198408,"journal":{"name":"2014 22nd European Signal Processing Conference (EUSIPCO)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114090573","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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