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Fast Non-minimal Solvers for Planar Motion Compatible Homographies 平面运动兼容同形异构的快速非极小解算器
Pub Date : 2019-02-19 DOI: 10.5220/0007258600400051
Marcus Valtonen Örnhag
This paper presents a novel polynomial constraint for homographies compatible with the general planar motion model. In this setting, compatible homographies have five degrees of freedom-instead of the general case of eight degrees of freedom-and, as a consequence, a minimal solver requires 2.5 point correspondences. The existing minimal solver, however, is computationally expensive, and we propose using non-minimal solvers, which significantly reduces the execution time of obtaining a compatible homography, with accuracy and robustness comparable to that of the minimal solver. The proposed solvers are compared with the minimal solver and the traditional 4-point solver on synthetic and real data, and demonstrate good performance, in terms of speed and accuracy. By decomposing the homographies obtained from the different methods, it is shown that the proposed solvers have future potential to be incorporated in a complete Simultaneous Localization and Mapping (SLAM) framework. (Less)
本文提出了一种适用于平面运动模型的多项式约束。在这种情况下,兼容同形异构词有5个自由度——而不是一般情况下的8个自由度——因此,最小解算器需要2.5个点对应。然而,现有的最小解算器计算成本高,我们建议使用非最小解算器,这大大减少了获得兼容单应性的执行时间,并且精度和鲁棒性与最小解算器相当。在合成数据和实际数据上与最小解算器和传统的四点解算器进行了比较,证明了该算法在速度和精度方面都有良好的性能。通过对不同方法得到的同形图进行分解,表明所提出的求解器具有整合到完整的同步定位与映射(SLAM)框架中的潜力。(少)
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引用次数: 5
Removal of Historical Document Degradations using Conditional GANs 使用条件gan去除历史文档退化
Pub Date : 2019-02-19 DOI: 10.5220/0007367701450154
Veeru Dumpala, Sheela Raju Kurupathi, S. S. Bukhari, A. Dengel
One of the most crucial problem in document analysis and OCR pipeline is document binarization. Many traditional algorithms over the past few decades like Sauvola, Niblack, Otsu etc,. were used for binarization which gave insufficient results for historical texts with degradations. Recently many attempts have been made to solve binarization using deep learning approaches like Autoencoders, FCNs. However, these models do not generalize well to real world historical document images qualitatively. In this paper, we propose a model based on conditional GAN, well known for its high-resolution image synthesis. Here, the proposed model is used for image manipulation task which can remove different degradations in historical documents like stains, bleed-through and non-uniform shadings. The performance of the proposed model outperforms recent state-of-the-art models for document image binarization. We support our claims by benchmarking the proposed model on publicly available PHIBC 2012, DIBCO (2009-2017) and Palm Leaf datasets. The main objective of this paper is to illuminate the advantages of generative modeling and adversarial training for document image binarization in supervised setting which shows good generalization capabilities on different inter/intra class domain document images.
文档二值化是文档分析和OCR管道中最关键的问题之一。过去几十年的许多传统算法,如Sauvola、Niblack、Otsu等。用于二值化,对有退化的历史文本给出的结果不充分。最近,许多人尝试使用深度学习方法来解决二值化问题,比如自动编码器、fcn。然而,这些模型不能很好地定性地推广到真实世界的历史文献图像。在本文中,我们提出了一个基于条件GAN的模型,该模型以其高分辨率图像合成而闻名。本文将所提出的模型用于图像处理任务,可以去除历史文档中不同的退化现象,如污渍、透血和不均匀阴影。所提出的模型的性能优于最近最先进的文档图像二值化模型。我们通过在公开可用的PHIBC 2012、DIBCO(2009-2017)和Palm Leaf数据集上对拟议模型进行基准测试来支持我们的主张。本文的主要目的是阐明生成建模和对抗训练在监督环境下对文档图像二值化的优势,它在不同的类间/类内领域文档图像上显示出良好的泛化能力。
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引用次数: 6
Clustering Honeybees by Its Daily Activity 蜜蜂的日常活动聚类
Pub Date : 2019-02-19 DOI: 10.5220/0007387505980604
E. Acuña, Velcy Palomino, José L. Agosto, R. Mégret, T. Giray, A. Prado, C. Alaux, Y. Conte
In this work, we analyze the activity of bees starting at 6 days old. The data was collected at the INRA (France) during 2014 and 2016. The activity is counted according to whether the bees enter or leave the hive. After data wrangling, we decided to analyze data corresponding to a period of 10 days. We use clustering method to determine bees with similar activity and to estimate the time during the day when the bees are most active. To achieve our objective, the data was analyzed in three different time periods in a day. One considering the daily activity during in two periods: morning and afternoon, then looking at activities in periods of 3 hours from 8:00am to 8:00pm and, finally looking at the activities hourly from 8:00am to 8:00pm. Our study found two clusters of bees and in one of them clearly the bees activity increased at the day 5. The smaller cluster included the most active bees representing about 24 percent of the total bees under study. Also, the highest activity of the bees was registered between 2:00pm until 3:00pm. A Chi-square test shows that there is a combined effect Treatment× Colony on the clusters formation.
在这项工作中,我们分析了蜜蜂从6天大开始的活动。该数据于2014年至2016年在法国INRA收集。活动是根据蜜蜂是否进入或离开蜂巢来计算的。经过数据整理,我们决定以10天为周期进行数据分析。我们使用聚类方法来确定具有相似活动的蜜蜂,并估计蜜蜂在一天中最活跃的时间。为了实现我们的目标,我们在一天中分析了三个不同的时间段的数据。首先考虑两个时间段的日常活动:上午和下午,然后从上午8点到晚上8点看3个小时的活动,最后从上午8点到晚上8点看每小时的活动。我们的研究发现了两群蜜蜂,其中一群蜜蜂的活动在第五天明显增加了。较小的集群包括最活跃的蜜蜂,约占被研究蜜蜂总数的24%。此外,蜜蜂的最高活动是在下午2点到3点之间。卡方检验表明,处理与菌落对簇的形成存在联合效应。
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引用次数: 0
Deep Learning for Relevance Filtering in Syndromic Surveillance: A Case Study in Asthma/Difficulty Breathing 深度学习在综合征监测中的相关性过滤:哮喘/呼吸困难的案例研究
Pub Date : 2019-02-19 DOI: 10.5220/0007366904910500
Oduwa Edo-Osagie, B. Iglesia, I. Lake, O. Edeghere
In this paper, we investigate deep learning methods that may extract some word context for Twitter mining for syndromic surveillance. Most of the work on syndromic surveillance has been done on the flu or Influenza- Like Illnesses (ILIs). For this reason, we decided to look at a different but equally important syndrome, asthma/difficulty breathing, as this is quite topical given global concerns about the impact of air pollution. We also compare deep learning algorithms for the purpose of filtering Tweets relevant to our syndrome of interest, asthma/difficulty breathing. We make our comparisons using different variants of the F-measure as our evaluation metric because they allow us to emphasise recall over precision, which is important in the context of syndromic surveillance so that we do not lose relevant Tweets in the classification. We then apply our relevance filtering systems based on deep learning algorithms, to the task of syndromic surveillance and compare the results with real-world syndromic surveillance data provided by Public Health England (PHE).We find that the RNN performs best at relevance filtering but can also be slower than other architectures which is important for consideration in real-time application. We also found that the correlation between Twitter and the real-world asthma syndromic surveillance data was positive and improved with the use of the deep- learning-powered relevance filtering. Finally, the deep learning methods enabled us to gather context and word similarity information which we can use to fine tune the vocabulary we employ to extract relevant Tweets in the first place.
在本文中,我们研究了深度学习方法,可以提取一些单词上下文,用于Twitter的综合征监测挖掘。大多数综合征监测工作是针对流感或流感样疾病(ILIs)进行的。出于这个原因,我们决定研究一种不同但同样重要的综合症,哮喘/呼吸困难,鉴于全球对空气污染影响的关注,这是一个非常热门的话题。我们还比较了深度学习算法,目的是过滤与我们感兴趣的综合症、哮喘/呼吸困难相关的推文。我们使用f度量的不同变体作为我们的评估指标进行比较,因为它们允许我们强调召回率而不是精度,这在综合征监测的背景下很重要,这样我们就不会在分类中丢失相关的推文。然后,我们将基于深度学习算法的相关过滤系统应用于综合征监测任务,并将结果与英国公共卫生部(PHE)提供的现实世界综合征监测数据进行比较。我们发现RNN在相关性过滤方面表现最好,但也比其他架构慢,这在实时应用中是重要的考虑因素。我们还发现Twitter与真实世界哮喘综合征监测数据之间的相关性是正的,并且通过使用深度学习驱动的相关性过滤得到了改善。最后,深度学习方法使我们能够收集上下文和单词相似度信息,我们可以使用这些信息来微调词汇表,以便首先提取相关的tweet。
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引用次数: 5
Adaptive Exploration of a UAVs Swarm for Distributed Targets Detection and Tracking 面向分布式目标检测与跟踪的无人机群自适应探索
Pub Date : 2019-02-19 DOI: 10.5220/0007581708370844
M. Cimino, M. Lega, Manilo Monaco, G. Vaglini
This paper focuses on the problem of coordinating multiple UAVs for distributed targets detection and tracking, in different technological and environmental settings. The proposed approach is founded on the concept of swarm behavior in multi-agent systems, i.e., a self-formed and self-coordinated team of UAVs which adapts itself to mission-specific environmental layouts. The swarm formation and coordination are inspired by biological mechanisms of flocking and stigmergy, respectively. These mechanisms, suitably combined, make it possible to strike the right balance between global search (exploration) and local search (exploitation) in the environment. The swarm adaptation is based on an evolutionary algorithm with the objective of maximizing the number of tracked targets during a mission or minimizing the time for target discovery. A simulation testbed has been developed and publicly released, on the basis of commercially available UAVs technology and real-world scenarios. Experimental results show that the proposed approach extends and sensibly outperforms a similar approach in the literature.
本文主要研究在不同技术和环境条件下协调多架无人机进行分布式目标探测和跟踪的问题。该方法基于多智能体系统中的群体行为概念,即一个自形成和自协调的无人机团队,该团队能够适应特定任务的环境布局。蜂群的形成和协调分别受到群集和污名的生物学机制的启发。这些机制适当地结合在一起,就有可能在环境中的全局搜索(探索)和局部搜索(利用)之间取得适当的平衡。群适应是基于一种进化算法,其目标是在任务中最大限度地跟踪目标数量或最小化目标发现时间。在商用无人机技术和真实世界场景的基础上,已经开发并公开发布了一个仿真试验台。实验结果表明,所提出的方法扩展并明显优于文献中的类似方法。
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引用次数: 8
3DCNN Performance in Hand Gesture Recognition Applied to Robot Arm Interaction 3DCNN手势识别在机械臂交互中的应用
Pub Date : 2019-02-19 DOI: 10.5220/0007570208020806
John Alejandro Castro-Vargas, Brayan S. Zapata-Impata, P. Gil, J. G. Rodríguez, Fernando Torres Medina
This work was funded by the Ministry of Economy, Industry and Competitiveness from the Spanish Government through the DPI2015-68087-R and the pre-doctoral grant BES-2016-078290, by the European Commission and FEDER funds through the project COMMANDIA (SOE2/P1/F0638), action supported by Interreg-V Sudoe.
这项工作由西班牙政府经济、工业和竞争力部通过DPI2015-68087-R和博士前拨款BES-2016-078290资助,由欧盟委员会和联邦联邦基金通过项目COMMANDIA (SOE2/P1/F0638)资助,行动由interregi - v Sudoe支持。
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引用次数: 4
Annealing by Increasing Resampling 增加重采样退火
Pub Date : 2019-02-19 DOI: 10.1007/978-3-030-40014-9_4
N. Higuchi, Yasunobu Imamura, T. Shinohara, K. Hirata, T. Kuboyama
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引用次数: 3
Template based Human Pose and Shape Estimation from a Single RGB-D Image 基于模板的RGB-D图像人体姿态和形状估计
Pub Date : 2019-02-19 DOI: 10.5220/0007383605740581
Zhongguo Li, A. Heyden, M. Oskarsson
Estimating the 3D model of the human body is needed for many applications. However, this is a challenging problem since the human body inherently has a high complexity due to self-occlusions and articulation. We present a method to reconstruct the 3D human body model from a single RGB-D image. 2D joint points are firstly predicted by a CNN-based model called convolutional pose machine, and the 3D joint points are calculated using the depth image. Then, we propose to utilize both 2D and 3D joint points, which provide more information, to fit a parametric body model (SMPL). This is implemented through minimizing an objective function, which measures the difference of the joint points between the observed model and the parametric model. The pose and shape parameters of the body are obtained through optimization and the final 3D model is estimated. The experiments on synthetic data and real data demonstrate that our method can estimate the 3D human body model correctly.
人体三维模型的估计在许多应用中都是必需的。然而,这是一个具有挑战性的问题,因为人体本身具有高度的复杂性,由于自我闭塞和关节。我们提出了一种从单幅RGB-D图像重建三维人体模型的方法。首先利用基于cnn的卷积位姿机模型预测二维关节点,然后利用深度图像计算三维关节点。然后,我们提出利用提供更多信息的二维和三维关节点来拟合参数化身体模型(SMPL)。这是通过最小化目标函数来实现的,该目标函数测量观测模型与参数模型之间结合点的差异。通过优化得到人体的位姿和形状参数,并对最终的三维模型进行估计。在合成数据和实际数据上的实验表明,该方法可以正确地估计出三维人体模型。
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引用次数: 3
Identification of Diseases in Corn Leaves using Convolutional Neural Networks and Boosting 基于卷积神经网络和Boosting的玉米叶片病害识别
Pub Date : 2019-02-19 DOI: 10.5220/0007687608940899
Prakruti V. Bhatt, Sanat Sarangi, Anshul Shivhare, Dineshkumar Singh, S. Pappula
Precision farming technologies are essential for a steady supply of healthy food for the increasing population around the globe. Pests and diseases remain a major threat and a large fraction of crops are lost each year due to them. Automated detection of crop health from images helps in taking timely actions to increase yield while helping reduce input cost. With an aim to detect crop diseases and pests with high confidence, we use convolutional neural networks (CNN) and boosting techniques on Corn leaf images in different health states. The queen of cereals, Corn, is a versatile crop that has adapted to various climatic conditions. It is one of the major food crops in India along with wheat and rice. Considering that different diseases might have different treatments, incorrect detection can lead to incorrect remedial measures. Although CNN based models have been used for classification tasks, we aim to classify similar looking disease manifestations with a higher accuracy compared to the one obtained by existing deep learning methods. We have evaluated ensembles of CNN based image features, with a classifier and boosting in order to achieve plant disease classification. Using an ensemble of Adaptive Boosting cascaded with a decision tree based classifier trained on features from CNN, we have achieved an accuracy of 98% in classifying the Corn leaf images into four different categories viz. Healthy, Common Rust, Late Blight and Leaf Spot. This is about 8% improvement in classification performance when compared to CNN only.
精准农业技术对于为全球不断增长的人口稳定供应健康食品至关重要。病虫害仍然是一个主要威胁,每年有很大一部分作物因此而损失。从图像中自动检测作物健康状况有助于及时采取行动提高产量,同时有助于降低投入成本。为了高可信度地检测作物病虫害,我们使用卷积神经网络(CNN)和增强技术对不同健康状态的玉米叶片图像进行处理。谷物女王玉米是一种适应各种气候条件的多功能作物。它是印度的主要粮食作物之一,还有小麦和大米。考虑到不同的疾病可能有不同的治疗方法,错误的检测可能导致错误的补救措施。虽然基于CNN的模型已经被用于分类任务,但我们的目标是对看起来相似的疾病表现进行分类,与现有的深度学习方法相比,分类的准确率更高。我们评估了基于CNN的图像特征集合,并使用分类器和boosting来实现植物病害分类。使用自适应增强与基于CNN特征训练的决策树分类器级联的集成,我们将玉米叶片图像分类为健康、普通锈病、晚枯病和叶斑病四种不同的类别,准确率达到98%。与CNN相比,这大约提高了8%的分类性能。
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引用次数: 24
Bipartite Edge Correlation Clustering: Finding an Edge Biclique Partition from a Bipartite Graph with Minimum Disagreement 二部边相关聚类:从最小分歧的二部图中寻找边的Biclique划分
Pub Date : 2019-02-19 DOI: 10.5220/0007471506990706
Mikio Mizukami, K. Hirata, T. Kuboyama
In this paper, first we formulate the problem of a bipartite edge correlation clustering which finds an edge biclique partition with the minimum disagreement from a bipartite graph, by extending the bipartite correlation clustering which finds a biclique partition. Then, we design a simple randomized algorithm for bipartite edge correlation clustering, based on the randomized algorithm of bipartite correlation clustering. Finally, we give experimental results to evaluate the algorithms from both artificial data and real data.
本文首先通过推广寻找双方划分的二部相关聚类问题,给出了从二部图中寻找分歧最小的边方划分的二部边相关聚类问题。然后,在二部相关聚类随机化算法的基础上,设计了一种简单的二部边缘相关聚类随机化算法。最后给出了人工数据和实际数据的实验结果。
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引用次数: 0
期刊
International Conference on Pattern Recognition Applications and Methods
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