深度学习体系结构已在不同领域(例如医学,农业和安全)取得了有希望的结果。但是,由于培训过程中所需的大型收藏品,在许多实际应用中使用这些强大的技术变得具有挑战性。几项作品通过提出可以更少学习更多知识的策略,例如弱和半监督的学习方法来克服它来克服它。由于这些方法通常无法解决对对抗性例子的记忆和敏感性,因此本文介绍了三种深度度量学习方法与混音相结合,以实现不完整的监督场景。我们表明,在这种情况下,指标学习中的一些最新方法可能无法很好地工作。此外,所提出的方法在不同数据集中的表现优于大多数。
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Video segmentation consists of a frame-by-frame selection process of meaningful areas related to foreground moving objects. Some applications include traffic monitoring, human tracking, action recognition, efficient video surveillance, and anomaly detection. In these applications, it is not rare to face challenges such as abrupt changes in weather conditions, illumination issues, shadows, subtle dynamic background motions, and also camouflage effects. In this work, we address such shortcomings by proposing a novel deep learning video segmentation approach that incorporates residual information into the foreground detection learning process. The main goal is to provide a method capable of generating an accurate foreground detection given a grayscale video. Experiments conducted on the Change Detection 2014 and on the private dataset PetrobrasROUTES from Petrobras support the effectiveness of the proposed approach concerning some state-of-the-art video segmentation techniques, with overall F-measures of $\mathbf{0.9535}$ and $\mathbf{0.9636}$ in the Change Detection 2014 and PetrobrasROUTES datasets, respectively. Such a result places the proposed technique amongst the top 3 state-of-the-art video segmentation methods, besides comprising approximately seven times less parameters than its top one counterpart.
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Scene change detection is an image processing problem related to partitioning pixels of a digital image into foreground and background regions. Mostly, visual knowledge-based computer intelligent systems, like traffic monitoring, video surveillance, and anomaly detection, need to use change detection techniques. Amongst the most prominent detection methods, there are the learning-based ones, which besides sharing similar training and testing protocols, differ from each other in terms of their architecture design strategies. Such architecture design directly impacts on the quality of the detection results, and also in the device resources capacity, like memory. In this work, we propose a novel Multiscale Cascade Residual Convolutional Neural Network that integrates multiscale processing strategy through a Residual Processing Module, with a Segmentation Convolutional Neural Network. Experiments conducted on two different datasets support the effectiveness of the proposed approach, achieving average overall $\boldsymbol{F\text{-}measure}$ results of $\boldsymbol{0.9622}$ and $\boldsymbol{0.9664}$ over Change Detection 2014 and PetrobrasROUTES datasets respectively, besides comprising approximately eight times fewer parameters. Such obtained results place the proposed technique amongst the top four state-of-the-art scene change detection methods.
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Research on remote sensing image classification significantly impacts essential human routine tasks such as urban planning and agriculture. Nowadays, the rapid advance in technology and the availability of many high-quality remote sensing images create a demand for reliable automation methods. The current paper proposes two novel deep learning-based architectures for image classification purposes, i.e., the Discriminant Deep Image Prior Network and the Discriminant Deep Image Prior Network+, which combine Deep Image Prior and Triplet Networks learning strategies. Experiments conducted over three well-known public remote sensing image datasets achieved state-of-the-art results, evidencing the effectiveness of using deep image priors for remote sensing image classification.
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Identifying anomalies has become one of the primary strategies towards security and protection procedures in computer networks. In this context, machine learning-based methods emerge as an elegant solution to identify such scenarios and learn irrelevant information so that a reduction in the identification time and possible gain in accuracy can be obtained. This paper proposes a novel feature selection approach called Finite Element Machines for Feature Selection (FEMa-FS), which uses the framework of finite elements to identify the most relevant information from a given dataset. Although FEMa-FS can be applied to any application domain, it has been evaluated in the context of anomaly detection in computer networks. The outcomes over two datasets showed promising results.
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In the last decade, exponential data growth supplied machine learning-based algorithms' capacity and enabled their usage in daily-life activities. Additionally, such an improvement is partially explained due to the advent of deep learning techniques, i.e., stacks of simple architectures that end up in more complex models. Although both factors produce outstanding results, they also pose drawbacks regarding the learning process as training complex models over large datasets are expensive and time-consuming. Such a problem is even more evident when dealing with video analysis. Some works have considered transfer learning or domain adaptation, i.e., approaches that map the knowledge from one domain to another, to ease the training burden, yet most of them operate over individual or small blocks of frames. This paper proposes a novel approach to map the knowledge from action recognition to event recognition using an energy-based model, denoted as Spectral Deep Belief Network. Such a model can process all frames simultaneously, carrying spatial and temporal information through the learning process. The experimental results conducted over two public video dataset, the HMDB-51 and the UCF-101, depict the effectiveness of the proposed model and its reduced computational burden when compared to traditional energy-based models, such as Restricted Boltzmann Machines and Deep Belief Networks.
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复杂的伤口通常会面临部分或完全损失皮肤厚度,从而通过次要意图愈合。它们可以是急性或慢性的,可以发现感染,缺血和组织坏死以及与全身性疾病的关联。全球研究机构报告了无数案件,最终涉及严重的公共卫生问题,因为它们涉及人力资源(例如医师和医疗保健专业人员),并对生活质量产生负面影响。本文提出了一个新的数据库,用于自动将复杂伤口自动分类为五个类别,即非缠绕区域,肉芽,纤维蛋白样组织和干性坏死,血肿。这些图像包括由压力,血管溃疡,糖尿病,燃烧和手术干预后的并发症引起的复杂伤口的不同情况。该数据集(称为ComplexWoundDB)是独一无二的,因为它可以从野外获得的27美元图像中的像素级分类,即在患者的房屋中收集图像,并由四名卫生专业人员标记。用不同的机器学习技术进行的进一步实验证明了解决计算机辅助复杂伤口组织分类问题的挑战。手稿阐明了该地区未来的方向,在文献中广泛使用的其他数据库中进行了详细比较。
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这项工作使用来自建设性模拟的可靠数据比较了监督的机器学习方法,以估算空袭期间发射导弹的最有效时刻。我们采用了重采样技术来改善预测模型,分析准确性,精度,召回和F1得分。的确,我们可以根据决策树以及其他算法对重采样技术的显着敏感性来确定模型的显着性能。最佳F1分数的模型的值分别为0.379和0.465,而没有重新采样技术,这一值分别增加了22.69%。因此,如果理想,重新采样技术可以改善模型的召回率和F1得分,而准确性和精确度略有下降。因此,通过通过建设性模拟获得的数据,可以根据机器学习模型开发决策支持工具,从而可以提高BVR空中战斗的飞行质量,从而提高进攻任务的有效性以达到特定目标。
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通常,基于生物谱系的控制系统可能不依赖于各个预期行为或合作适当运行。相反,这种系统应该了解未经授权的访问尝试的恶意程序。文献中提供的一些作品建议通过步态识别方法来解决问题。这些方法旨在通过内在的可察觉功能来识别人类,尽管穿着衣服或配件。虽然该问题表示相对长时间的挑战,但是为处理问题的大多数技术存在与特征提取和低分类率相关的几个缺点,以及其他问题。然而,最近的深度学习方法是一种强大的一组工具,可以处理几乎任何图像和计算机视觉相关问题,为步态识别提供最重要的结果。因此,这项工作提供了通过步态认可的关于生物识别检测的最近作品的调查汇编,重点是深入学习方法,强调他们的益处,暴露出弱点。此外,它还呈现用于解决相关约束的数据集,方法和体系结构的分类和表征描述。
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综合产生的内容的广泛扩散是一种需要紧急对策的严重威胁。合成含量的产生不限于多媒体数据,如视频,照片或音频序列,但涵盖了可以包括生物图像的显着大面积,例如西幕和微观图像。在本文中,我们专注于检测综合生成的西幕图像。生物医学文献在很大程度上探讨了西部污染图像,已经表明了如何通过目视检查或标准取证检测器轻松地伪造这些图像。为了克服缺乏公开可用的数据集,我们创建了一个包含超过14k原始的西幕图像和18K合成的Western-Blot图像的新数据集,由三种不同的最先进的生成方法产生。然后,我们调查不同的策略来检测合成的Western印迹,探索二进制分类方法以及单级探测器。在这两种情况下,我们从不利用培训阶段的合成纤维图像。所达到的结果表明,即使在这些科学图像的合成版本未优化利用检测器,综合生成的西幕图像也可以具有良好的精度。
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