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2016 12th International Conference on Signal-Image Technology & Internet-Based Systems (SITIS)最新文献

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Querying Data Services in an Uncertain Environment: A Possibilistic-Based Approach 不确定环境中的数据服务查询:一种基于可能性的方法
Asma Omri, Karim Benouaret, Mohamed Nazih Omri, D. Benslimane
The acceptance of open data practices by individuals and organizations lead to an enormous explosion in data production on the Internet. The access to a large number of these data is carried out through Web services, which provide a standard way to interact with data. This class of services is known as data services. In this context, users' queries often require the composition of multiple data services to be answered. On the other hand, the data returned by a data service is not always certain due to various raisons, e.g., the service accesses different data sources, privacy constraints, etc. In this paper, we study the basic activities of data services that are affected by the uncertainty of data, more specifically, modeling, invocation and composition. We propose a possibilistic approach that treats the uncertainty in all these activities.
个人和组织对开放数据实践的接受导致了互联网上数据生产的巨大爆炸。对大量这些数据的访问是通过Web服务进行的,Web服务提供了一种与数据交互的标准方式。这类服务被称为数据服务。在这种情况下,用户的查询通常需要回答多个数据服务的组合。另一方面,由于各种原因,例如服务访问不同的数据源、隐私约束等,数据服务返回的数据并不总是确定的。在本文中,我们研究了受数据不确定性影响的数据服务的基本活动,即建模、调用和组合。我们提出一种可能性方法来处理所有这些活动中的不确定性。
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引用次数: 3
Selfie Detection by Synergy-Constraint Based Convolutional Neural Network 基于协同约束的卷积神经网络自拍照检测
Yashas Annadani, Vijayakrishna Naganoor, A. Jagadish, K. Chemmangat
Categorisation of huge amount of data on the multimedia platform is a crucial task. In this work, we propose a novel approach to address the subtle problem of selfie detection for image database segregation on the web, given rapid rise in the number of selfies being clicked. A Convolutional Neural Network (CNN) is modeled to learn a synergy feature in the common subspace of head and shoulder orientation, derived from Local Binary Pattern (LBP) and Histogram of Oriented Gradients (HOG) features respectively. This synergy was captured by projecting the aforementioned features using Canonical Correlation Analysis (CCA). We show that the resulting network's convolutional activations in the neighbourhood of spatial keypoints captured by SIFT are discriminative for selfie-detection. In general, proposed approach aids in capturing intricacies present in the image data and has the potential for usage in other subtle image analysis scenarios apart from just selfie detection. We investigate and analyse the performance of the popular CNN architectures (GoogleNet, Alexnet), used for other image classification tasks, when subjected to the task of detecting the selfies on the multimedia platform. The results of the proposed approach are compared with these popular architectures on a dataset of ninety thousand images comprising of roughly equal number of selfies and non-selfies. Experimental results on this dataset shows the effectiveness of the proposed approach.
对多媒体平台上的海量数据进行分类是一项至关重要的任务。在这项工作中,我们提出了一种新的方法来解决网络上图像数据库隔离的自拍检测的微妙问题,因为自拍被点击的数量迅速增加。对卷积神经网络(CNN)进行建模,分别从局部二值模式(Local Binary Pattern, LBP)和方向梯度直方图(Histogram of Oriented Gradients, HOG)特征中提取头部和肩部方向共同子空间中的协同特征。这种协同作用是通过使用典型相关分析(CCA)预测上述特征来实现的。我们证明了所得网络在SIFT捕获的空间关键点附近的卷积激活对于自检测具有区别性。总的来说,所提出的方法有助于捕获图像数据中存在的复杂性,并且除了自拍检测之外,还具有在其他微妙图像分析场景中使用的潜力。我们调查和分析了用于其他图像分类任务的流行CNN架构(GoogleNet, Alexnet)在检测多媒体平台上的自拍照任务时的性能。将所提出的方法的结果与这些流行的架构在9万张图像的数据集上进行比较,这些图像包括大致相同数量的自拍照和非自拍照。在该数据集上的实验结果表明了该方法的有效性。
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引用次数: 3
Fast Fully Automatic Segmentation of the Severely Abnormal Human Right Ventricle from Cardiovascular Magnetic Resonance Images Using a Multi-Scale 3D Convolutional Neural Network 基于多尺度三维卷积神经网络的心血管磁共振图像中严重异常右心室快速全自动分割
A. Giannakidis, K. Kamnitsas, V. Spadotto, J. Keegan, Gillian Smith, B. Glocker, D. Rueckert, S. Ernst, M. Gatzoulis, D. Pennell, S. Babu-Narayan, D. Firmin
Cardiac magnetic resonance (CMR) is regarded as the reference examination for cardiac morphology in tetralogy of Fallot (ToF) patients allowing images of high spatial resolution and high contrast. The detailed knowledge of the right ventricular anatomy is critical in ToF management. The segmentation of the right ventricle (RV) in CMR images from ToF patients is a challenging task due to the high shape and image quality variability. In this paper we propose a fully automatic deep learning-based framework to segment the RV from CMR anatomical images of the whole heart. We adopt a 3D multi-scale deep convolutional neural network to identify pixels that belong to the RV. Our robust segmentation framework was tested on 26 ToF patients achieving a Dice similarity coefficient of 0.8281±0.1010 with reference to manual annotations performed by expert cardiologists. The proposed technique is also computationally efficient, which may further facilitate its adoption in the clinical routine.
心脏磁共振(CMR)被认为是法洛四联症(ToF)患者心脏形态学的参考检查,可以获得高空间分辨率和高对比度的图像。对右心室解剖的详细了解对ToF的治疗至关重要。由于右心室形状和图像质量的高可变性,在ToF患者的CMR图像中分割右心室(RV)是一项具有挑战性的任务。在本文中,我们提出了一种基于全自动深度学习的框架,用于从整个心脏的CMR解剖图像中分割RV。我们采用三维多尺度深度卷积神经网络来识别属于RV的像素。我们的鲁棒分割框架在26例ToF患者中进行了测试,参考心脏病专家的手工注释,Dice相似系数为0.8281±0.1010。所提出的技术也具有计算效率,这可能进一步促进其在临床常规中的采用。
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引用次数: 5
Times Change, Stalling Stays: Subjective Quality Assessment over Time of Stalling in Autostereoscopic 3D Video Services 时代变化,失速停留:自动立体3D视频服务中失速随时间的主观质量评估
P. A. Kara, M. Martini, C. Hewage, F. Felisberti
The interruption of video playback continuity, also identified from users' perspective as rebuffering or stalling, is one of the key phenomena that can hinder user experience during streaming video services. Its subjective observation, however, may change over time, similarly to most human factors. In this paper we present the results of a research designed to investigate how the perception of rebuffering during video streams varies over time, and how it correlates with the perceptual abilities of individuals. The subjective tests were performed on an autostereoscopic, glasses-free 3D display, as our experiment also studies the depth distance and thus the perceived size of objects in video content with a given motion during stalling events.
视频播放连续性的中断,从用户的角度来看,也被称为重缓冲或失速,是流媒体视频服务中影响用户体验的关键现象之一。然而,它的主观观察可能会随着时间的推移而改变,就像大多数人为因素一样。在本文中,我们展示了一项研究的结果,该研究旨在调查视频流中重新缓冲的感知如何随着时间的推移而变化,以及它如何与个体的感知能力相关。主观测试是在无眼镜的自动立体3D显示器上进行的,因为我们的实验还研究了深度距离,从而在失速事件中具有给定运动的视频内容中感知到的物体大小。
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引用次数: 3
The Effect of Light Field Reconstruction and Angular Resolution Reduction on the Quality of Experience 光场重建和角度分辨率降低对体验质量的影响
P. A. Kara, P. Kovács, Suren Vagharshakyan, M. Martini, A. Barsi, T. Balogh, A. Chuchvara, Ahmed Chehaibi
The quality of visual contents displayed on 3D autostereoscopic displays – such as light field displays – essentially depend on factors that are not present in case of 3D stereoscopic or 2D ones, like angular resolution. A higher number of views in a given field of view enables a smoother, continuous motion parallax, but evidently requires more resources to transmit and display. However, in several cases a sufficiently high number of views might not even be available, thus light field reconstruction is required to increase the density of intermediate views. In this paper we introduce the results of a research aiming to measure the perceptual difference between light field reconstruction and different angular resolutions via a series of subjective image quality assessments. The analysis also calls attention to transmission requirements of content for light field displays.
在3D自动立体显示器(如光场显示器)上显示的视觉内容的质量基本上取决于3D立体或2D显示器所不存在的因素,如角分辨率。在给定的视场中,更多的视图可以实现更平滑、连续的运动视差,但显然需要更多的资源来传输和显示。然而,在一些情况下,甚至可能没有足够多的视图,因此需要光场重建来增加中间视图的密度。本文介绍了一项研究的结果,该研究旨在通过一系列主观图像质量评估来衡量光场重建与不同角度分辨率之间的感知差异。分析还提出了光场显示对内容传输的要求。
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引用次数: 14
Emotion Identification from Spontaneous Communication 来自自发交流的情感认同
Fekade Getahun Taddesse, Mikiyas Kebede
This study aimed to design a model for automatic identification of emotion from spontaneous communication using the acoustic characteristics of human speech. An experimental setup to collect and annotate call center Amharic telephone dialogs containing natural emotions is presented. These dialogs, involve 35 subjects (18 male and 17 female), are first manually decomposed into speaker turns and then segmented into intermediate chunks to be used as the analysis unit for feature calculation. Open class annotation is carried out by 3 professional psychologists and the various emotional states are mapped onto 4 cover classes, and a Majority Voting (MV) technique is applied to decide perceived emotion in each chunk. A total of 170 acoustic features consisting of prosodic, spectral and voice quality features are extracted from each chunk. An optimal feature set representing emotion (i.e. 33 all together) are selected through the use of generic algorithm and used to train Multilayer Perceptron Neural Network (MLPNN) classifier. A prototype application has been developed and the classification performance has been evaluated based on extracted features. Our preliminary speech emotion recognition model exhibits an average accuracy of 72.4% in identifying Anger, Fear, Positive and Sadness emotions.
本研究旨在设计一个基于人类语音声学特征的情感自动识别模型。提出了一个收集和注释包含自然情绪的呼叫中心阿姆哈拉语电话对话的实验装置。这些对话涉及35个主体(18个男性和17个女性),首先被人工分解成说话人的轮换,然后被分割成中间块作为特征计算的分析单元。公开类标注由3名专业心理学家进行,将各种情绪状态映射到4个覆盖类上,并采用Majority Voting (MV)技术来决定每个块的感知情绪。从每个块中提取由韵律特征、频谱特征和语音质量特征组成的170个声学特征。通过使用通用算法选择代表情感的最优特征集(即33个特征集),并用于训练多层感知器神经网络(MLPNN)分类器。开发了一个原型应用程序,并基于提取的特征对分类性能进行了评估。我们的初步语音情绪识别模型在识别愤怒、恐惧、积极和悲伤情绪方面的平均准确率为72.4%。
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引用次数: 3
Numerical Remarks on the Estimation of the Option Price 关于期权价格估计的数值说明
S. Cuomo, R. Campagna, V. D. Somma, G. Severino
The computation of the European options price in a Black-Scholes market, characterized by the presence of no arbitrage condition, is an important applicative problem. In this paper we are interested in highlighting some numerical issues related to this problem. The proposed procedure is mainly divided into three parts: the test of the lognomality of the risk asset, the estimation of the volatility of the underlying and, finally, the determination of the price. As concerns the first point, we propose the adoption of the the Shapiro-Wilk test, in the second one we suggest to estimate the volatility by the sample standard deviation and in the third point we apply the Black-Scholes formula and we introduce an approximation for a Normal function value by means of a quadrature formula.
以不存在套利条件为特征的Black-Scholes市场的欧式期权价格计算是一个重要的应用问题。在本文中,我们感兴趣的是强调与此问题有关的一些数值问题。该过程主要分为三个部分:风险资产的对数态检验,标的波动率的估计,最后确定价格。关于第一点,我们建议采用夏皮罗-威尔克检验,在第二点,我们建议通过样本标准差估计波动率,在第三点,我们应用布莱克-斯科尔斯公式,并通过正交公式引入正态函数值的近似值。
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引用次数: 4
The System Vehicle of Application Detector for Categorize Type 分类型应用检测器的系统载体
Siriruang Phatchuay, Worawut Yimyam
The Detection of the vehicles on the road for the classification of the vehicles. The image processing by Blob Analysis for careful all the time, because of safety while driving is important. It's help to reduce accidents on the road, this article presents a program of on-road driving in a vehicle. When processed by the image processing and display counting when the object of interest when they move into the period, accounting for 96% of accuracy.
对道路上的车辆进行检测,对车辆进行分类。Blob Analysis的图像处理一直都很小心,因为行车安全很重要。为了减少道路交通事故的发生,本文提出了一种车辆上路驾驶程序。当经过图像处理并显示计数时,当感兴趣的物体移动时就进入周期,准确率占96%。
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引用次数: 15
Equal Partition Based Clustering Approach for Event Summarization in Videos 基于等分割的视频事件摘要聚类方法
Krishan Kumar, D. Shrimankar, Navjot Singh
The rapid growth of video data demands both effective and efficient video summarization methods so that users are allowed to speedily browse and comprehend a large amount of video content. Hence, it is very challenging to store and access such audiovisual information in real time where an immense amount of recorded video content is rising within one second. In this paper we proposed an equal partition based clustering technique for summarizing the events in videos which can work better for real time applications (for e.g., surveillance video in various security systems). In clustering, the difficulty is to obtain the optimal set of clusters, which is gained by implementing Davies-Bouldin Index, a cluster validation technique which permits the users with free parameter based video summarization method for selecting the numbers of key–frames without incurring additional computational cost. The qualitative as well as quantitative evaluation is done in order to compare the performances of our proposed model and state-of-theart models. Experimental results on two benchmark datasets with various types of videos expose that the proposed method outperforms the state-of-the-art models with the best Precision and F–measure.
快速增长的视频数据需要有效高效的视频摘要方法,使用户能够快速浏览和理解大量的视频内容。因此,在一秒钟内大量录制的视频内容不断增加的情况下,实时存储和访问这些视听信息是非常具有挑战性的。在本文中,我们提出了一种基于等分区的聚类技术来总结视频中的事件,该技术可以更好地用于实时应用(例如,各种安全系统中的监控视频)。在聚类中,难点在于如何获得最优的聚类集,这是通过实现Davies-Bouldin索引来实现的。Davies-Bouldin索引是一种聚类验证技术,它允许用户使用基于自由参数的视频摘要方法来选择关键帧的数量,而不会产生额外的计算成本。定性和定量的评估是为了比较我们提出的模型和目前最先进的模型的性能。在两个具有不同类型视频的基准数据集上的实验结果表明,该方法具有最佳的精度和F-measure,优于目前最先进的模型。
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引用次数: 43
Driver Drowsiness Detection Using Eye-Closeness Detection 基于眼距检测的驾驶员睡意检测
Oraan Khunpisuth, Taweechai Chotchinasri, Varakorn Koschakosai, Narit Hnoohom
The purpose of this paper was to devise a way to alert drowsy drivers in the act of driving. One of the causes of car accidents comes from drowsiness of the driver. Therefore, this study attempted to address the issue by creating an experiment in order to calculate the level of drowsiness. A requirement for this paper was the utilisation of a Raspberry Pi Camera and Raspberry Pi 3 module, which were able to calculate the level of drowsiness in drivers. The frequency of head tilting and blinking of the eyes was used to determine whether or not a driver felt drowsy. With an evaluation on ten volunteers, the accuracy of face and eye detection was up to 99.59 percent.
本文的目的是设计一种方法来提醒昏昏欲睡的司机在驾驶行为。车祸的原因之一是司机的睡意。因此,本研究试图通过创建一个实验来计算困倦程度来解决这个问题。本文的一个要求是利用树莓派相机和树莓派3模块,它们能够计算驾驶员的困倦程度。驾驶员头部倾斜和眨眼的频率被用来判断驾驶员是否感到昏昏欲睡。通过对10名志愿者的评估,面部和眼睛检测的准确率高达99.59%。
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引用次数: 47
期刊
2016 12th International Conference on Signal-Image Technology & Internet-Based Systems (SITIS)
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