尽管最近的面部识别(FR)系统在许多部署场景中取得了出色的成果,但它们在挑战现实世界中的表现仍在质疑。因此,面部图像质量评估(FIQA)技术旨在通过为它们提供示例质量信息来支持FR系统,这些信息可用于拒绝不适合识别目的的质量差数据。文献中已经提出了几组依赖不同概念的FIQA方法,所有这些方法都可以用于生成质量的面部图像,这些面部图像可以用作伪造的(质量)标签,并可以利用进行训练(回归 - 基于)质量估计模型。几个fiqa批准\ - 表明可以从与某些面部匹配器生成的配对相似度分布中提取大量样本质量信息。基于这种见解,我们在本文中提出了一种质量标签优化方法,该方法将来自配对配置的相似性的样本质量信息纳入现有现成的FIQA技术的质量预测。我们使用三种不同数据集的三种最先进的FIQA方法评估了建议的方法。我们的实验结果表明,提出的优化过程在很大程度上取决于执行的优化迭代次数。在十个迭代中,该方法似乎执行了最佳,始终超过三种FIQA方法的基本质量得分,这是为实验所选择的。
translated by 谷歌翻译
人工智能(AI)是21世纪最有前途的技术之一,对社会和经济产生了明显影响。通过这项工作,我们简要概述了全球趋势,行业应用以及我们在工业和学术界的国际经验和工作中的精选用例。目的是提出全球和地区的积极实践,并就将B&H定位在全球AI场景中定位的现实目标和机会提供明智的意见。
translated by 谷歌翻译
Face image quality assessment (FIQA) attempts to improve face recognition (FR) performance by providing additional information about sample quality. Because FIQA methods attempt to estimate the utility of a sample for face recognition, it is reasonable to assume that these methods are heavily influenced by the underlying face recognition system. Although modern face recognition systems are known to perform well, several studies have found that such systems often exhibit problems with demographic bias. It is therefore likely that such problems are also present with FIQA techniques. To investigate the demographic biases associated with FIQA approaches, this paper presents a comprehensive study involving a variety of quality assessment methods (general-purpose image quality assessment, supervised face quality assessment, and unsupervised face quality assessment methods) and three diverse state-of-theart FR models. Our analysis on the Balanced Faces in the Wild (BFW) dataset shows that all techniques considered are affected more by variations in race than sex. While the general-purpose image quality assessment methods appear to be less biased with respect to the two demographic factors considered, the supervised and unsupervised face image quality assessment methods both show strong bias with a tendency to favor white individuals (of either sex). In addition, we found that methods that are less racially biased perform worse overall. This suggests that the observed bias in FIQA methods is to a significant extent related to the underlying face recognition system.
translated by 谷歌翻译
压力溃疡在ICU患者中具有很高的患病率,但如果以初始阶段识别,则可预防。在实践中,布拉登规模用于分类高风险患者。本文通过使用MIMIC-III V1.4中可用的数据调查了在电子健康中使用机器学习记录数据的使用。制定了两个主要贡献:评估考虑在住宿期间所有预测的模型的新方法,以及用于机器学习模型的新培训方法。结果与现有技术相比,表现出卓越的性能;此外,所有型号在精密召回曲线中的每个工作点都超过了Braden刻度。 - - les \〜oes por按\〜ao possuem alta preval \ ^ encia em pacientes de Uti e s \〜ao preven \'iveis ao serem endicidificadas em Est \'agios Iniciais。 na pr \'atica materiza-se a escala de braden para classifica \ c {c} \〜ao de pacientes em risco。 Este Artigo Investiga o Uso de Apenizado de M \'Aquina Em Dados de Registros Eletr \ ^ Onicos Para Este Fim,Parir Da Base dados Mimic-III V1.4。 s \〜ao feitas duas contribui \ c {c} \〜oes principais:uma nova abordagem para a avalia \ c {c} \〜ao dos modelos e da escala da escala de braden levando em conta todas作为predi \ c {c} \ 〜oes feitas ao longo das interna \ c {c} \〜oes,euro novo m \'etodo de treinamento para os modelos de aprendizo de m \'aquina。 os结果os overidos superam o estado da arte everifica-se que os modelos superam意义a escala de braden em todos oS pontos de Opera \ c {c} \〜〜ao da curva de precis \〜ao por sensibilidade。
translated by 谷歌翻译
Advances in image processing and analysis as well as machine learning techniques have contributed to the use of biometric recognition systems in daily people tasks. These tasks range from simple access to mobile devices to tagging friends in photos shared on social networks and complex financial operations on self-service devices for banking transactions. In China, the use of these systems goes beyond personal use becoming a country's government policy with the objective of monitoring the behavior of its population. On July 05th 2021, the Brazilian government announced acquisition of a biometric recognition system to be used nationwide. In the opposite direction to China, Europe and some American cities have already started the discussion about the legality of using biometric systems in public places, even banning this practice in their territory. In order to open a deeper discussion about the risks and legality of using these systems, this work exposes the vulnerabilities of biometric recognition systems, focusing its efforts on the face modality. Furthermore, it shows how it is possible to fool a biometric system through a well-known presentation attack approach in the literature called morphing. Finally, a list of ten concerns was created to start the discussion about the security of citizen data and data privacy law in the Age of Artificial Intelligence (AI).
translated by 谷歌翻译
Recent state-of-the-art face recognition (FR) approaches have achieved impressive performance, yet unconstrained face recognition still represents an open problem. Face image quality assessment (FIQA) approaches aim to estimate the quality of the input samples that can help provide information on the confidence of the recognition decision and eventually lead to improved results in challenging scenarios. While much progress has been made in face image quality assessment in recent years, computing reliable quality scores for diverse facial images and FR models remains challenging. In this paper, we propose a novel approach to face image quality assessment, called FaceQAN, that is based on adversarial examples and relies on the analysis of adversarial noise which can be calculated with any FR model learned by using some form of gradient descent. As such, the proposed approach is the first to link image quality to adversarial attacks. Comprehensive (cross-model as well as model-specific) experiments are conducted with four benchmark datasets, i.e., LFW, CFP-FP, XQLFW and IJB-C, four FR models, i.e., CosFace, ArcFace, CurricularFace and ElasticFace, and in comparison to seven state-of-the-art FIQA methods to demonstrate the performance of FaceQAN. Experimental results show that FaceQAN achieves competitive results, while exhibiting several desirable characteristics.
translated by 谷歌翻译
大型审慎的语言模型最近征服了自然语言处理领域。作为BERT中引入的主要掩盖语言建模的替代方案,T5模型引入了更通用的训练目标,即序列转换的顺序,其中包括蒙版语言模型,但自然地适合文本生成任务,例如机器翻译,摘要,开放 - 开放 - 域问题回答,文本简化,对话系统等。T5模型的单语变体仅限于资源良好的语言,而大量的多语言T5模型则支持101种语言。相比之下,我们训练了两个不同尺寸的T5型序列,以使用较少的资源并分析其行为的形态丰富的斯洛文尼语的序列模型。关于分类任务,SLOT5模型主要落后于单语Slovene Sloberta模型,但应考虑生成任务。
translated by 谷歌翻译
在这项工作中,研究了来自磁共振图像的脑年龄预测的深度学习技术,旨在帮助鉴定天然老化过程的生物标志物。生物标志物的鉴定可用于检测早期神经变性过程,以及预测与年龄相关或与非年龄相关的认知下降。在这项工作中实施并比较了两种技术:应用于体积图像的3D卷积神经网络和应用于从轴向平面的切片的2D卷积神经网络,随后融合各个预测。通过2D模型获得的最佳结果,其达到了3.83年的平均绝对误差。 - Neste Trabalho S \〜AO InvestigaDAS T \'Ecnicas de Aprendizado Profundo Para a previ \ c {c} \〜ate daade脑电站a partir de imagens de resson \ ^ ancia magn \'etica,Visando辅助Na Identifica \ c {C} \〜AO de BioMarcadores Do Processo Natural de Envelhecimento。一个identifica \ c {c} \〜ao de bioMarcarcores \'e \'util para a detec \ c {c} \〜ao de um processo neurodegenerativo em Est \'Agio无数,Al \'em de possibilitar Prever Um decl 'inio cognitivo relacionado ou n \〜ao \`一个懒惰。 Duas T \'ECICAS S \〜AO ImportyAdas E Comparadas Teste Trabalho:Uma Rede神经卷应3D APLICADA NA IMAGEM VOLUM \'ETRICA E UME REDE神经卷轴2D APLICADA A FATIAS DO PANIAS轴向,COM后面fus \〜AO DAS PREDI \ C {c} \ \ oes个人。 o Melhor ResultAdo Foi optido Pelo Modelo 2D,Que Alcan \ C {C} OU UM ERRO M \'EDIO ABSOLUTO DE 3.83 ANOS。
translated by 谷歌翻译
在人类生活的最初阶段,沟通被视为社会互动的过程,始终是达成当事方之间达成共识的最佳方法。在此过程中的理解和可信度对于相互协议的验证至关重要。但是,如何做到这一沟通才能达到巨大的群众?当寻求的是信息及其批准时,这是主要的挑战。在这种情况下,本研究介绍了ALT软件,该软件是由适应葡萄牙语的原始可读性指标开发的,以减少通信困难。该软件的开发是由哈贝马斯(Habermas)的沟通行动理论激励的,哈贝马斯(Habermas)使用多学科风格来衡量与公众建立和维持与公众建立和保持安全健康关系的沟通渠道中话语的可信度。 - 没有est \'agio da vida humana a comunica \ c {c} \ 〜ao,vista como um como um como um como de intera \ c {c} \ 〜ao社交,foi semper o melhor caminho para para para o consenso Entre作为partes。 o entendimento e credibilidade nesse processo s \ 〜Ao Fundamentais para para que o acordo m \'utuo seja seja valyado。 Mas,Como faz \^e-lo de forma que essa comunica \ c {c} \ 〜ao alcance a grande massa? eSse \'o principtal desafio que se busca \'e difus \ 〜ao da informa \ c {c} \ 〜ao a sua aprova \ c {c {c} \ 〜ao。 Nesse Contectiono,Este estudo apresenta o Software Alt,desenvolvido a partir de m \'eTricas de legibilidade originais aDaptadas para a l \'ingua polduguesa,dispon \'ivel'ivel na web,para reduzir,dificuldades na comunica na comunica \ comunica \ c \ c} AO。 O desenvolvimento do software foi motivado pela teoria do agir comunicativo de Habermas, que faz uso de um estilo multidisciplinar para medir a credibilidade do discurso nos canais de comunica\c{c}\~ao utilizados para construir e manter uma rela\c{c } \ 〜Ao Segura E Saud \'avel com o p \'ublico。
translated by 谷歌翻译
translated by 谷歌翻译
我们的食品偏好指导我们的食物选择,反过来影响我们的个人健康和社交生活。在本文中,我们采用了一种方法,使用OWL2中表达的域本体进行支持,以支持正规主义CP-Net中的偏好的获取和表示。具体而言,我们展示了域本体论的构建和问卷设计来获取和代表偏好。偏好的收购和代表在大学食堂的领域实施。我们在这项初步工作中的主要贡献是获取偏好,并优选地通过本体中所代表的域知识来获取偏好。
translated by 谷歌翻译
面部图像的质量显着影响底层识别算法的性能。面部图像质量评估(FIQA)估计捕获的图像的效用在实现可靠和准确的识别性能方面。在这项工作中,我们提出了一种新的学习范式,可以在培训过程中学习内部网络观察。基于此,我们所提出的CR-FiQA使用该范例来通过预测其相对分类性来估计样品的面部图像质量。基于关于其类中心和最近的负类中心的角度空间中的训练样本特征表示来测量该分类性。我们通过实验说明了面部图像质量与样本相对分类性之间的相关性。由于此类属性仅为培训数据集可观察到,因此我们建议从培训数据集中学习此属性,并利用它来预测看不见样品的质量措施。该培训同时执行,同时通过用于面部识别模型训练的角度裕度罚款的软墨损失来优化类中心。通过对八个基准和四个面部识别模型的广泛评估实验,我们展示了我们提出的CR-FiQA在最先进(SOTA)FIQ算法上的优越性。
translated by 谷歌翻译
如今,有了大数据和数据湖泊,我们面临着大量数据,这些数据很难手动管理。在这种情况下,对个人数据的保护需要自动分析数据发现。存储在知识库中已经分析的属性名称可以优化此自动发现。要拥有更好的知识库,我们不应存储任何名称没有意义的属性。在本文中,要检查属性的名称是否具有含义,我们提出了一个解决方案来计算此名称和字典中的单词之间的距离。我们对距离的研究诸如N-gram,Jaro-Winkler和Levenshtein的功能,显示了在知识库中设定属性的接受阈值的限制。为了克服这些局限性,我们的解决方案旨在通过基于最长序列使用指数函数来增强得分计算。此外,还提出了词典中的双扫描,以处理具有复合名称的属性。
translated by 谷歌翻译
本文显示编辑和在线发布的边界正在失去其实力。在这种情况下,只会有意义地续签WayhyPertexts,尤其面对Web的演变。我们尤其是特殊的棘手的学者超文本文件流程 - 具体而是文化背景。本文的目的是证明,考虑到网络的众多分支机构,只有通过作者,编辑和广播公司之间的适当对话,才能通过适当的对话来提高质量文档的超文本。它将满足读者,因为他们可以达到适当的信息。还将表明,这种扫描中的集电运营者是纳税人。实际上,定性的形式化工作将与强大的广播范围相结合。最后,我们将指出,调解的这项方式必须由信息通信的演员领导,使人类和机器的教材。这种冥想的行为在这里被指定为序列课程的序列。
translated by 谷歌翻译
In Novel Class Discovery (NCD), the goal is to find new classes in an unlabeled set given a labeled set of known but different classes. While NCD has recently gained attention from the community, no framework has yet been proposed for heterogeneous tabular data, despite being a very common representation of data. In this paper, we propose TabularNCD, a new method for discovering novel classes in tabular data. We show a way to extract knowledge from already known classes to guide the discovery process of novel classes in the context of tabular data which contains heterogeneous variables. A part of this process is done by a new method for defining pseudo labels, and we follow recent findings in Multi-Task Learning to optimize a joint objective function. Our method demonstrates that NCD is not only applicable to images but also to heterogeneous tabular data.
translated by 谷歌翻译
该手稿概述了我在Besan \ c {C} Institute内部进行的研究工作,尤其是在自动和微型技术系统(AS2M)部门中。最重要的是我(CO)实习生,博士学位学生和博士后的所有结果。我想向他们致敬,以便他们在这里和其他地方为科学研究做出了重大贡献。
translated by 谷歌翻译
Recently, there has been an interest in improving the resources available in Intrusion Detection System (IDS) techniques. In this sense, several studies related to cybersecurity show that the environment invasions and information kidnapping are increasingly recurrent and complex. The criticality of the business involving operations in an environment using computing resources does not allow the vulnerability of the information. Cybersecurity has taken on a dimension within the universe of indispensable technology in corporations, and the prevention of risks of invasions into the environment is dealt with daily by Security teams. Thus, the main objective of the study was to investigate the Ensemble Learning technique using the Stacking method, supported by the Support Vector Machine (SVM) and k-Nearest Neighbour (kNN) algorithms aiming at an optimization of the results for DDoS attack detection. For this, the Intrusion Detection System concept was used with the application of the Data Mining and Machine Learning Orange tool to obtain better results
translated by 谷歌翻译
口语理解的最新进展受益于接受大型语音语料库训练的自制模型。对于法国人来说,Lebenchmark项目已经提供了此类模型,并在包括口语理解在内的几项任务上取得了令人印象深刻的进步。这些进步在计算时间和能耗方面具有不可忽略的成本。在本文中,我们比较了几种旨在降低这种成本同时保持竞争性能的学习策略。实验是在媒体语料库上进行的,并表明可以在保持最先进的表演的同时降低学习成本。
translated by 谷歌翻译
面部识别系统必须处理可能导致匹配决策不正确的大型变量(例如不同的姿势,照明和表达)。这些可变性可以根据面部图像质量来测量,这在样本的效用上定义了用于识别的实用性。以前的识别作品不使用这种有价值的信息或利用非本质上的质量估算。在这项工作中,我们提出了一种简单且有效的面部识别解决方案(Qmagface),其将质量感知的比较分数与基于大小感知角裕度损耗的识别模型相结合。所提出的方法包括比较过程中特定于模型的面部图像质量,以增强在无约束情况下的识别性能。利用利用损失诱导的质量与其比较评分之间的线性,我们的质量意识比较功能简单且高度普遍。在几个面部识别数据库和基准上进行的实验表明,引入的质量意识导致识别性能一致的改进。此外,所提出的Qmagface方法在挑战性环境下特别好,例如交叉姿势,跨年或跨品。因此,它导致最先进的性能在几个面部识别基准上,例如在XQLFQ上的98.50%,83.97%,CFP-FP上的98.74%。 QMagface的代码是公开可用的。
translated by 谷歌翻译
本文提出了一种自动创建变量(在回归的情况下)的方法,该方法补充了初始输入向量中包含的信息。该方法是一个预处理步骤,其中将要回归的变量的连续值离散为一组间隔,然后将其用于定义值阈值。然后,对分类器进行训练,以预测要回归的值小于或等于这些阈值中的每个阈值。然后,将分类器的不同输出以额外的变量向量的形式串联,以丰富回归问题的初始向量。因此,实施的系统可以被视为通用预处理工具。我们用5种类型的回归器测试了提出的富集方法,并在33个回归数据集中对其进行了评估。我们的实验结果证实了该方法的兴趣。
translated by 谷歌翻译