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2011 17th International Conference on Digital Signal Processing (DSP)最新文献

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Alternating line high dynamic range imaging 交变线高动态范围成像
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004897
Seungki Cho, H. Hong, Heechul Han, Yanglim Choi
{"title":"Alternating line high dynamic range imaging","authors":"Seungki Cho, H. Hong, Heechul Han, Yanglim Choi","doi":"10.1109/ICDSP.2011.6004897","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004897","url":null,"abstract":"In this paper, a novel method of improving dynamic range of imaging device is proposed. Unlike multi-capture HDR methods, the suggested method requires only a small modification to existing CMOS imaging sensor. By changing exposure time line by line, one can obtain a multi-exposure image in a single capture of an image. With such captured image, digital image processing algorithms are applied to recover the lost vertical resolution with minimal degradation. This paper will cover overall system issues as well as detailed description of the algorithms applied to recover high dynamic range image.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133142752","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: 4
Spectral estimation of migrating targets in wideband radar 宽带雷达中迁移目标的频谱估计
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6005000
Francois Deudon, S. Bidon, O. Besson, J. Tourneret
{"title":"Spectral estimation of migrating targets in wideband radar","authors":"Francois Deudon, S. Bidon, O. Besson, J. Tourneret","doi":"10.1109/ICDSP.2011.6005000","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6005000","url":null,"abstract":"Low pulse repetition frequency radars aimed at detecting moving targets are faced with the problem of blind velocities, since Doppler ambiguous targets have to compete with clutter and possibly the sidelobes of strong targets. On the other hand, wideband radars offer high range resolution, and hence fast moving targets, in contrast to clutter or non moving targets, are likely to migrate during the coherent processing interval. Moreover, range migration is different between two Doppler ambiguous targets. These properties can be used to remove Doppler ambiguities and detect targets which fall in the clutter or targets sidelobes. In this paper, we derive new spectral estimators (and detectors accordingly) that can take into account range migration to improve detectability of Doppler ambiguous targets. The new techniques are based on an extension of Capon method to the wideband case, and take into account the non-stationarity of the covariance matrix of the targets. Numerical simulations show that the new estimators significantly reduce clutter and target sidelobes compared to previous proposed schemes.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122854399","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
Depth map coding by dense disparity estimation for MVD compression 基于密集视差估计的MVD压缩深度图编码
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6005011
Marco Cagnazzo, B. Pesquet-Popescu
{"title":"Depth map coding by dense disparity estimation for MVD compression","authors":"Marco Cagnazzo, B. Pesquet-Popescu","doi":"10.1109/ICDSP.2011.6005011","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6005011","url":null,"abstract":"In multiview video representation, one of the most popular format is the so-called multiple view video plus depth. This representation is made up of N image sequences, each accompanied by a sequence of depth maps, telling the distance of each represented pixel from the observing camera. The depth maps are needed at the decoder side in order to generate intermediate views and therefore to enrich the user experience. This format is very flexible but also very demanding, in terms of storage space or and transmission bandwidth. Therefore, compression is needed. At this end, one of the key steps is an efficient representation of depth maps. In this work we build over a proposed method for multiple view video coding, based on dense disparity estimation between views. This allows us to obtain a compact and high-quality depthmap representation. In particular we explore the complex relationship between estimation and encoding parameters, showing that an optimal parameter set exist, that allows a fine-tuning of the estimation phase and an adaption of its results to the subsequent compression phase. Experiments are encouraging, showing remarkable gain over simple methods such as H.264/AVC simulcast, and even some gain with respect to more sophisticated techniques such as MVC.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128653361","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
An abandoned and removed object detection algorithm in a reactive smart surveillance system 被动智能监控系统中一种废弃和移除的目标检测算法
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004901
G. D. Caterina, J. Soraghan
{"title":"An abandoned and removed object detection algorithm in a reactive smart surveillance system","authors":"G. D. Caterina, J. Soraghan","doi":"10.1109/ICDSP.2011.6004901","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004901","url":null,"abstract":"Important issues such as low image quality and human operators' reactivity can seriously reduce the effectiveness of video surveillance systems. Digital video surveillance is used in conjunction with video analytics, which is the semantic analysis of video data through signal and image processing techniques. This paper presents a novel algorithm for real time detection of abandoned and removed objects, in the context of a reactive smart surveillance system, which notifies the occurrence of such events of interest to registered users, within seconds. The proposed algorithm is demonstrated to be completely adaptive and computationally efficient.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128466521","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
Optimalwaveform design for MIMO radarwith low probability of interception 低截获概率MIMO雷达的最佳波形设计
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004928
Songbai Wang, Jian Wang, Jianshu Chen, X. Shan
{"title":"Optimalwaveform design for MIMO radarwith low probability of interception","authors":"Songbai Wang, Jian Wang, Jianshu Chen, X. Shan","doi":"10.1109/ICDSP.2011.6004928","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004928","url":null,"abstract":"In this paper, we consider the waveform design problem of multiple input multiple output (MIMO) radar in the presence of an interceptor. By the joint considerations of high estimation accuracy and low probability of interception, we formulate the problem as maximizing the mutual information with a constraint on the Kullback-Liebler (KL) divergence. Then it is converted effectively to a convex optimization, which can be solved efficiently to give the optimal waveform. Simulation results show that there exits the optimal tradeoff between the estimation accuracy and the probability of interception.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129230906","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: 4
Human brain response to visual fatigue caused by stereoscopic depth perception 人类大脑对立体深度感知引起的视觉疲劳的反应
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004997
Dongchan Kim, Yong Ju Jung, Eunwoo Kim, Yong Man Ro, Hyunwoo Park
{"title":"Human brain response to visual fatigue caused by stereoscopic depth perception","authors":"Dongchan Kim, Yong Ju Jung, Eunwoo Kim, Yong Man Ro, Hyunwoo Park","doi":"10.1109/ICDSP.2011.6004997","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004997","url":null,"abstract":"In stereopsis, excessive screen disparity is known as one of the main causes of visual fatigue. Although the visual fatigue caused by stereoscopic depth perception has been reported in a large number of subjective assessments, there has been little effort to measure objective indicators for the visual fatigue. In this study, we investigated the relationship between the visual fatigue and the amount of binocular disparity by using functional magnetic resonance imaging (fMRI). As a result, we detected strong neuronal activities in frontal eye field (FEF) when the presented visual stimuli had disparities beyond the comfort zone. Since FEF is known to be involved in eye movement control, it also appears to have correlation with the visual fatigue caused by the stereoscopic depth perception.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117121401","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: 39
Binaural sound source localization in the presence of reverberation 混响时双耳声源的定位
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004954
Cecilia Maria Zannini, R. Parisi, A. Uncini
{"title":"Binaural sound source localization in the presence of reverberation","authors":"Cecilia Maria Zannini, R. Parisi, A. Uncini","doi":"10.1109/ICDSP.2011.6004954","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004954","url":null,"abstract":"Binaural sound source localization consists in estimating the position of a sound source with respect to a single pair of stationary microphones. A possible implementation of binaural localization exploits the information contained in two physical cues: the Interaural Time Difference (ITD) and the Interaural Level Difference (ILD). A recent paper [1] described a novel approach to binaural source localization based on a joint ILD-ITD estimation. The present work describes the effect of acoustic reverberation on this method. As expected, reverberation adds uncertainty to the localization process, thusmaking it necessary to introduce proper prefiltering techniques.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127457986","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
Exemplar-based image inpainting with patch shifting scheme 基于样例的图像补绘方法
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004940
Sarawut Tae-O-Sot, A. Nishihara
{"title":"Exemplar-based image inpainting with patch shifting scheme","authors":"Sarawut Tae-O-Sot, A. Nishihara","doi":"10.1109/ICDSP.2011.6004940","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004940","url":null,"abstract":"This paper presents a novel exemplar-based image inpainting which uses a simple patch shifting scheme. Traditional exemplar-based inpainting techniques do not consider on the number of known and unknown pixels in the target patch. The errors often occur when small number of known pixels are used to present a large unknown area. The proposed patch shifting scheme provides more meaningful target patch than traditional exemplar-based approach. In this scheme, the target patch which has known pixels less than predefined threshold would be shifted in the direction that increases the number of known pixels. This means the chance to filling-in each patch more naturally is increasing. Experimental results show a significant improvement from traditional exemplar-based approach in both visual and mathematical aspects. Comparing with traditional exemplar-based inpainting sharper and more continuous edge can be achieved by our approach.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"3 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120985922","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: 12
Guiding optical flow estimation using superpixels 利用超像素进行导光流估计
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004871
Theodosios Gkamas, Christophoros Nikou
{"title":"Guiding optical flow estimation using superpixels","authors":"Theodosios Gkamas, Christophoros Nikou","doi":"10.1109/ICDSP.2011.6004871","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004871","url":null,"abstract":"In this paper, we show how the segmentation of an image into superpixels may be used as preprocessing paradigm to improve the accuracy of the optical flow estimation in an image sequence. Superpixels play the role of accurate support masks for the integration of the optical flow equation. We employ a variation of a recently proposed optical flow algorithm relying on local image properties that are taken into account only if the involved pixels belong to the same image segment. Experimental results show that the proposed optical flow estimation scheme significantly improves the accuracy of the estimated motion field with respect to other standard methods.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123729802","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
Speech dereverberation based on a recorded handclap 基于录制的鼓掌的语音去噪
2011 17th International Conference on Digital Signal Processing (DSP) Pub Date : 2011-07-06 DOI: 10.1109/ICDSP.2011.6004895
A. Tsilfidis, Eleftheria Georganti, Elias K. Kokkinis, J. Mourjopoulos
{"title":"Speech dereverberation based on a recorded handclap","authors":"A. Tsilfidis, Eleftheria Georganti, Elias K. Kokkinis, J. Mourjopoulos","doi":"10.1109/ICDSP.2011.6004895","DOIUrl":"https://doi.org/10.1109/ICDSP.2011.6004895","url":null,"abstract":"A semi-blind framework for the suppression of late speech reverberation is presented. The method is based on spectral subtraction and utilizes a simple recorded handclap to estimate the Power Spectral Density (PSD) of late reverberation. A statistical analysis of measured Room Impulse Responses (RIRs) and recorded handclaps demonstrates the sufficiency of the above estimation. Dereverberation results show that the proposed technique achieves significant reverberation suppression at multiple speaker positions in each room without compromising the quality of the estimated signals.","PeriodicalId":360702,"journal":{"name":"2011 17th International Conference on Digital Signal Processing (DSP)","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-07-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123240185","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
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