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2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)最新文献

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Real-time local stereo matching using edge sensitive adaptive windows 实时局部立体匹配使用边缘敏感自适应窗口
2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2014-08-28 DOI: 10.5220/0005065301170126
Maarten Dumont, Patrik Goorts, S. Maesen, P. Bekaert, G. Lafruit
{"title":"Real-time local stereo matching using edge sensitive adaptive windows","authors":"Maarten Dumont, Patrik Goorts, S. Maesen, P. Bekaert, G. Lafruit","doi":"10.5220/0005065301170126","DOIUrl":"https://doi.org/10.5220/0005065301170126","url":null,"abstract":"This paper presents a novel aggregation window method for stereo matching, by combining the disparity hypothesis costs of multiple pixels in a local region more efficiently for increased hypothesis confidence. We propose two adaptive windows per pixel region, one following the horizontal edges in the image, the other the vertical edges. Their combination defines the final aggregation window shape that rigorously follows all object edges, yielding better disparity estimations with at least 0.5 dB gain over similar methods in literature, especially around occluded areas. Also, a qualitative improvement is observed with smooth disparity maps, respecting sharp object edges. Finally, these shape-adaptive aggregation windows are represented by a single quadruple per pixel, thus supporting an efficient GPU implementation with negligible overhead.","PeriodicalId":438702,"journal":{"name":"2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121841502","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: 2
Product integral binding coefficients for high-order wavelets 高阶小波的积积分结合系数
2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2014-08-28 DOI: 10.5220/0005013300170024
Nick Michiels, J. Put, P. Bekaert
{"title":"Product integral binding coefficients for high-order wavelets","authors":"Nick Michiels, J. Put, P. Bekaert","doi":"10.5220/0005013300170024","DOIUrl":"https://doi.org/10.5220/0005013300170024","url":null,"abstract":"This paper provides an efficient algorithm to calculate product integral binding coefficients for a heterogeneous mix of wavelet bases. These product integrals are ubiquitous in multiple applications such as signal processing and rendering. Previous work has focused on simple Haar wavelets. Haar wavelets excel at encoding piecewise constant signals, but are inadequate for compactly representing smooth signals for which high-order wavelets are ideal. Our algorithm provides an efficient way to calculate the tensor of these binding coefficients. The algorithm exploits both the hierarchical nature and vanishing moments of the wavelet bases, as well as the sparsity and symmetry of the tensor. We demonstrate the effectiveness of high-order wavelets with a rendering application. The smoother wavelets represent the signals more effectively and with less blockiness than the Haar wavelets of previous techniques.","PeriodicalId":438702,"journal":{"name":"2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126095374","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: 2
A multimedia tracing traitors scheme using multi-level hierarchical structure for Tardos fingerprint based audio watermarking 一种基于多级层次结构的多媒体跟踪叛逆者方案，用于基于Tardos指纹的音频水印
2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2014-08-28 DOI: 10.5220/0005066602890296
Faten Chaabane, Maha Charfeddine, C. Amar
{"title":"A multimedia tracing traitors scheme using multi-level hierarchical structure for Tardos fingerprint based audio watermarking","authors":"Faten Chaabane, Maha Charfeddine, C. Amar","doi":"10.5220/0005066602890296","DOIUrl":"https://doi.org/10.5220/0005066602890296","url":null,"abstract":"This paper presents a novel approach in tracing traitors field. It proposes a multi-level hierarchical structure to the used probabilistic fingerprinting code; the well known Tardos code. This proposed structure is performed to address the problem of computational costs and time of Tardos code during its accusation step. The generated fingerprint is embedded in the extracted audio stream of the media by an audio watermarking technique operating in the frequency domain. The watermarking technique represents an original choice compared to the existing works in the literature. We assume that the strategy of collusion is known, we compare then the performance of our tracing traitors framework against different types of attacks. We show in this paper how the proposed hierarchy and the watermarking layer have a satisfying impact on the performance of our tracing system.","PeriodicalId":438702,"journal":{"name":"2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"7 10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128767095","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
Home position recognition methods using polarizing films for an eye-gaze interface system 基于偏振光片的眼-视界面系统定位方法
2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2014-08-28 DOI: 10.5220/0005048902750280
K. Ogata, Kensuke Sakamoto, Shingo Niino
{"title":"Home position recognition methods using polarizing films for an eye-gaze interface system","authors":"K. Ogata, Kensuke Sakamoto, Shingo Niino","doi":"10.5220/0005048902750280","DOIUrl":"https://doi.org/10.5220/0005048902750280","url":null,"abstract":"In eye-gaze interface systems, users' head movements during use result in detection errors. This problem causes inaccurate positioning of the mouse pointer on the display screen. A mechanism that allows the user to recognize the home position, which is an appropriate position for the head while using an eye-gaze interface system, can provide a useful solution to the problem because the user can then simply adjust his/her head position. The implementation of such a mechanism does not require special equipment, such as a position sensor to detect head movement and calculate compensation. We thus propose in this paper methods for recognizing the home position using polarizing films. Taking advantage of the characteristics of polarizing films, we propose two guidance methods to help an eye-gaze interface system user recognize whether or not his/her head is in the home position and adjust the position of the head if needed. The results of our experiments reveal that our proposed methods improve the usability of eye-gaze interface systems, and that one of our methods is more effective than the other. Therefore, our mechanism is useful in producing simple and low-cost interface systems.","PeriodicalId":438702,"journal":{"name":"2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115745515","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
Food image presentation system that discharge smell through screen and psychological effect 食品形象呈现系统通过画面和心理效果排出气味
2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2014-08-28 DOI: 10.5220/0005024102610268
A. Tomono, Mana Tanaka, Rei Shu, Keisuke Tomono
{"title":"Food image presentation system that discharge smell through screen and psychological effect","authors":"A. Tomono, Mana Tanaka, Rei Shu, Keisuke Tomono","doi":"10.5220/0005024102610268","DOIUrl":"https://doi.org/10.5220/0005024102610268","url":null,"abstract":"The author et al. are currently engaged in a project for an image displaying system with a screen from which smells are discharged for users, together with images, aiming at applying it to digital signage and for other purposes in order to enhance the realistic sensation of the food images. The author et al. conducted experiments in presenting food images and discharging smells from the same position, and analyzed the users' psychological impact. A subject questionnaire and a cerebral blood-flow meter were used for the analysis. In the first experiment, it was clarified that when an airflow and a smell were discharged in conformity with the image of cooking with a steaming hot pot, an inhaling action occurred and smell perception rate was enhanced. In the second experiment, when a smell fit with a food image was discharged, the realistic sensation and the oxyhemoglobin rose in the vicinity of the temple because the salivation central nerves became active.","PeriodicalId":438702,"journal":{"name":"2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125320052","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
A multi-threaded full-feature HEVC encoder based on Wavefront Parallel Processing 基于波前并行处理的多线程全功能HEVC编码器
2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2014-08-28 DOI: 10.5220/0005018300900098
S. Radicke, J. Hahn, C. Grecos, Qi Wang
{"title":"A multi-threaded full-feature HEVC encoder based on Wavefront Parallel Processing","authors":"S. Radicke, J. Hahn, C. Grecos, Qi Wang","doi":"10.5220/0005018300900098","DOIUrl":"https://doi.org/10.5220/0005018300900098","url":null,"abstract":"The High Efficiency Video Coding (HEVC) standard was finalized in early 2013. It provides a far better coding efficiency than any preceding standard but it also bears a significantly higher complexity. In order to cope with the high processing demands, the standard includes several parallelization schemes, that make multi-core encoding and decoding possible. However, the effective realization of these methods is up to the respective codec developers. We propose a multi-threaded encoder implementation, based on HEVC's reference test model HM11, that makes full use of the Wavefront Parallel Processing (WPP) mechanism and runs on regular consumer hardware. Furthermore, our software produces identical output bitstreams as HM11 and supports all of its features that are allowable in combination with WPP. Experimental results show that our prototype is up to 5.5 times faster than HM11 running on a machine with 6 physical processing cores.","PeriodicalId":438702,"journal":{"name":"2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128737506","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: 14
Evaluation of acoustic feedback cancellation methods with multiple feedback paths 多反馈路径声反馈对消方法的评价
2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2014-08-28 DOI: 10.5220/0005068201270133
Bruno C. Bispo, D. Freitas
{"title":"Evaluation of acoustic feedback cancellation methods with multiple feedback paths","authors":"Bruno C. Bispo, D. Freitas","doi":"10.5220/0005068201270133","DOIUrl":"https://doi.org/10.5220/0005068201270133","url":null,"abstract":"Acoustic feedback limits the maximum stable gain of a public address system and may cause the system to become unstable. Acoustic feedback cancellation methods use an adaptive filter to identify the impulse response of the acoustic feedback path and then remove its influence from the system. However, if the traditional adaptive filtering algorithms are used, a bias is introduced in the estimate of the acoustic feedback path obtained by the adaptive filter. Several methods have been proposed to overcome the bias problem but they are generally evaluated considering a public address system with only one microphone and one loudspeaker. This work evaluates some of the state-of-art methods considering a public address system with one microphone and four loudspeakers that results in multiple feedback paths and corresponds to a more realistic scenario of a typical system. Simulation results demonstrated that, with multiple feedback paths, the acoustic feedback cancellation methods are able to increase in 12 dB the maximum stable gain of the public address system when the source signal is speech.","PeriodicalId":438702,"journal":{"name":"2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124366104","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
Image denoising algorithm with a three-dimensional grid system of coupled nonlinear elements 三维网格系统非线性元素耦合图像去噪算法
2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2014-08-28 DOI: 10.5220/0005119302200225
A. Nomura, Y. Mizukami, K. Okada
{"title":"Image denoising algorithm with a three-dimensional grid system of coupled nonlinear elements","authors":"A. Nomura, Y. Mizukami, K. Okada","doi":"10.5220/0005119302200225","DOIUrl":"https://doi.org/10.5220/0005119302200225","url":null,"abstract":"This paper presents an image denoising algorithm with a three-dimensional grid system of coupled nonlinear elements. The system consists of a two-dimensional image grid and a one-dimensional grid representing a quantized image brightness. At each grid point, a FitzHugh-Nagumo type nonlinear element is placed and coupled with other elements placed at its nearest neighboring grid points. The FitzHugh-Nagumo element is described with a set of time-evolving ordinary differential equations, and is tuned to be excitable. When we externally stimulate the grid system with an image brightness distribution, we could observe that noise in the distribution was reduced and signal was strengthened as time proceeds. Thus, the image denoising algorithm utilizes this property of the grid system, in which we propose to modify external stimuli so as to have broad Gaussian distributions. We confirm performance of the algorithm on artificial and real images in comparison with two classical algorithms of a diffusion equation and median filtering.","PeriodicalId":438702,"journal":{"name":"2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127100093","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
Clothes change detection using the Kinect sensor 使用Kinect传感器检测衣服变化
2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2014-08-28 DOI: 10.5220/0005001200850089
Dimitris Sgouropoulos, Theodoros Giannakopoulos, Sergios Petridis, S. Perantonis, Antonis Korakis
{"title":"Clothes change detection using the Kinect sensor","authors":"Dimitris Sgouropoulos, Theodoros Giannakopoulos, Sergios Petridis, S. Perantonis, Antonis Korakis","doi":"10.5220/0005001200850089","DOIUrl":"https://doi.org/10.5220/0005001200850089","url":null,"abstract":"This paper describes a methodology for detecting when a human has changed clothes. Changing clothes is a basic activity of daily living which makes the methodology valuable for tracking the functional status of elderly people, in the context of a non-contract unobtrusive monitoring system. Our approach uses Kinect and the OpenNI SDK, along with a workflow of basic image analysis steps. Evaluation has been conducted on a set of real recordings under various illumination conditions, which is publicly available along with the source code of the proposed system at http://users.iit.demokritos.gr/ tyianak/ClothesCode.html.","PeriodicalId":438702,"journal":{"name":"2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132544180","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: 13
Combining top-down and bottom-up visual saliency for firearms localization 结合自顶向下和自底向上视觉显著性的枪械定位
2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP) Pub Date : 2014-08-28 DOI: 10.5220/0005054300250032
E. Ardizzone, R. Gallea, M. Cascia, G. Mazzola
{"title":"Combining top-down and bottom-up visual saliency for firearms localization","authors":"E. Ardizzone, R. Gallea, M. Cascia, G. Mazzola","doi":"10.5220/0005054300250032","DOIUrl":"https://doi.org/10.5220/0005054300250032","url":null,"abstract":"Object detection is one of the most challenging issues for computer vision researchers. The analysis of the human visual attention mechanisms can help automatic inspection systems, in order to discard useless information and improving performances and efficiency. In this paper we proposed our attention based method to estimate firearms position in images of people holding firearms. Both top-down and bottom-up mechanisms are involved in our system. The bottom-up analysis is based on a state-of-the-art approach. The top-down analysis is based on the construction of a probabilistic model of the firearms position with respect to the people's face position. This model has been created by analyzing information from of a public available database of movie frames representing actors holding firearms.","PeriodicalId":438702,"journal":{"name":"2014 International Conference on Signal Processing and Multimedia Applications (SIGMAP)","volume":"210 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127909917","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
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