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2017 Seventh International Conference on Image Processing Theory, Tools and Applications (IPTA)最新文献

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Markov random fields for pattern extraction in analog wafer test data 模拟晶圆测试数据模式提取的马尔可夫随机场
Stefan Schrunner, Olivia Bluder, Anja Zernig, Andre Kästner, Roman Kern
In semiconductor industry it is of paramount importance to check whether a manufactured device fulfills all quality specifications and is therefore suitable for being sold to the customer. The occurrence of specific spatial patterns within the so-called wafer test data, i.e. analog electric measurements, might point out on production issues. However, the shape of these critical patterns is unknown. In this paper different kinds of process patterns are extracted from wafer test data by an image processing approach using Markov Random Field models for image restoration. The goal is to develop an automated procedure to identify visible patterns in wafer test data to improve pattern matching. This step is a necessary precondition for a subsequent root-cause analysis of these patterns. The developed pattern extraction algorithm yields a more accurate discrimination between distinct patterns, resulting in an improved pattern comparison than in the original dataset. In a next step pattern classification will be applied to improve the production process control.
在半导体工业中,检查制造的器件是否符合所有质量规范,从而适合销售给客户是至关重要的。所谓晶圆测试数据(即模拟电测量)中出现的特定空间模式可能会指出生产问题。然而,这些关键图案的形状是未知的。本文利用马尔科夫随机场模型对硅片测试数据进行图像处理,提取不同类型的过程模式。目标是开发一种自动化程序来识别晶圆测试数据中的可见模式,以改善模式匹配。这一步是对这些模式进行后续根本原因分析的必要前提。与原始数据集相比,所开发的模式提取算法在不同模式之间产生更准确的区分,从而提高了模式比较。下一步,图案分类将用于改进生产过程控制。
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引用次数: 6
High performance and fast object detection in road environments 道路环境中高性能、快速的目标检测
M. Kang, Y. Lim
In this paper, we present a high performance and fast object detection method based on a fully convolutional network (FCN) for advanced driver assistance systems (ADAS). Object detection methods based on deep learning have high performance but they require high computational complexity. Even if a method works on the high-performance graphics processing unit (GPU) hardware platform, it is hard to guarantee real-time processing. General object detectors based on deep learning try to localize too many classes of objects in various dynamic environments. The proposed detection method based on FCN improves detection performance and maintains real-time processing in road environments through various schemes related to the limitation of object class type, data augmentation, network architecture, and multi-ratio default boxes. Our experimental results show that the proposed method outperforms a previous method both in terms of performance and speed.
在本文中,我们提出了一种基于全卷积网络(FCN)的高性能快速目标检测方法,用于高级驾驶辅助系统(ADAS)。基于深度学习的目标检测方法具有较高的性能,但其计算复杂度较高。即使一种方法在高性能图形处理单元(GPU)硬件平台上工作,也很难保证实时处理。基于深度学习的一般对象检测器试图在各种动态环境中定位太多类别的对象。本文提出的基于FCN的检测方法通过对象类类型限制、数据增强、网络架构、多比例默认框等多种方案,提高了道路环境下的检测性能,保持了实时处理。实验结果表明,该方法在性能和速度上都优于先前的方法。
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引用次数: 7
A new change detector in heterogeneous remote sensing imagery 一种新的异构遥感图像变化检测器
Redha Touati, M. Mignotte, M. Dahmane
Multimodal change detection in satellite images is a challenging and complex problem mainly because the local statistics of the images to be compared can be very different. In this paper, we present a novel, reliable and simple change detection operator which is first based on a imaging modality-invariant operator that detects the common specific high-frequency pattern of each structural region existing in the two heterogeneous satellite images. The resultant similarity map is then filtered out by a superpixel-based spatially adaptive filter which increases its reliability against noise. Second, in order to achieve more robustness, changes are then identified, from this similarity map, by combining the results of different automatic thresholding algorithms with a weighted spatially regularized multi-criteria decision analysis. Experimental results involving a mixture of different types of imaging modalities confirm the robustness of the proposed approach.
卫星图像的多模态变化检测是一个具有挑战性和复杂性的问题,主要是因为待比较图像的局部统计数据可能非常不同。本文提出了一种新颖、可靠、简单的变化检测算子,该算子首先基于成像模态不变算子来检测两幅异构卫星图像中存在的每个结构区域的共同特定高频模式。然后通过基于超像素的空间自适应滤波器过滤出所得的相似性图,从而提高了其对噪声的可靠性。其次,为了获得更强的鲁棒性,然后通过将不同自动阈值算法的结果与加权空间正则化多准则决策分析相结合,从相似性图中识别变化。实验结果涉及不同类型的成像模式的混合物证实了所提出的方法的鲁棒性。
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引用次数: 14
Effective Waterline detection for unmanned surface vehicles in inland water 内陆水域无人水面航行器的有效水线检测
Wenqiang Zhan, Changshi Xiao, Haiwen Yuan, Y. Wen
In the maritime environment, real-time and accurate water line detection can help unmanned surface vehicles (USVs) for autonomous navigation. Special features such as cloud clutter, water reflection, water surface glint and background texture in optical images make it very difficult for USV to detect the water line accurately. To address this problem, a novel water line detection approach is proposed for a practical USV system in the inland water. In this paper, land-water and sky-water line are taken into consideration as part of the water line. To minimize the influence of background texture, the local variation method is introduced to smooth the image and remain the background structure, such as the water line. Regarding the linear characteristic, these water line points are constrained near a line by the RANSAC algorithm. The experimental results are given in the end and show that the proposed approach is effective and can be applied to different environments.
在海洋环境中,实时准确的水线检测可以帮助无人水面车辆(usv)自主导航。光学图像中的云杂波、水面反射、水面闪烁和背景纹理等特殊特征使得USV很难准确探测到水线。为了解决这一问题,提出了一种新的内陆水下无人潜航器系统水线检测方法。本文考虑了水陆线和天水线作为水线的一部分。为了减少背景纹理的影响,引入局部变化法对图像进行平滑处理,同时保留背景结构,如水线等。考虑到水线的线性特性,采用RANSAC算法将水线点约束在一条直线附近。最后给出了实验结果,表明该方法是有效的,可以适用于不同的环境。
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引用次数: 9
Image cryptography based on the imitation of gene fusion and horizontal gene transfer 基于模仿基因融合和水平基因转移的图像密码
Z. Hamici
In this paper a novel signal processing algorithm for secure image communication is proposed. It is a genetic algorithm that combines both gene fusion and Horizontal Gene Transfer (HGT) inspired from the spread of antibiotic resistance in bacteria. The symmetric encryption key playing the role of a pathogen is generated by controlled multi-layer random sequences. The principal key is then absorbed by the organism genome represented by the image. The process of encryption starts by a full uptake of the key-agent or pathogen which has the size of the whole image; the image and the principal key are merged together in a gene fusion process. A second phase of encryption is an obfuscation process produced by an HGT where the genes are pixels and the chromosomes are the rows and columns of the image. The obfuscation process as a second layer of encryption is realized by two sub-keys from which the principal key matrix is constructed. The whole process is repeated recursively L rounds. A Salt extracted from the image hash-value is used against chosen-plaintext cryptanalysis, therefore, even a modification of one pixel will generate different encryption keys adding a stealthy-key feature to the cipher. The key generation process with the two layers of encryption of the genetic algorithm are fully described. Results of the signal processing algorithm based on gene fusion and HGT show a great promise in genetic inspired data security.
本文提出了一种新的用于图像安全通信的信号处理算法。它是一种结合了基因融合和水平基因转移(HGT)的遗传算法,灵感来自细菌中抗生素耐药性的传播。扮演病原体角色的对称加密密钥是由可控的多层随机序列生成的。然后,主密钥被图像所代表的生物体基因组所吸收。加密过程从完全吸收具有整个图像大小的密钥代理或病原体开始;在基因融合过程中,图像和主密钥被合并在一起。加密的第二阶段是由HGT产生的混淆过程,其中基因是像素,染色体是图像的行和列。作为第二层加密的混淆过程由两个子密钥实现,主密钥矩阵由两个子密钥构造。整个过程递归地重复L轮。从图像哈希值中提取的Salt用于选择明文密码分析,因此,即使修改一个像素也会生成不同的加密密钥,从而为密码添加隐形密钥特性。详细描述了遗传算法的两层加密密钥生成过程。基于基因融合和HGT的信号处理算法在遗传数据安全方面具有广阔的应用前景。
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引用次数: 4
A novel algorithm for optimal matching of elastic shapes with landmark constraints 一种具有地标约束的弹性形状最优匹配算法
Justin Strait, S. Kurtek
An important problem in statistical shape analysis is the matching of geometric features across shapes, known as registration. In short, given two objects, one wants to know the correspondence of points on one shape to points on another. Such a matching problem, with various levels of complexity, is present regardless of the shape's mathematical representation. A recent framework for shape analysis of n-dimensional curves combines an infinite-dimensional functional curve representation with landmark information encoding important curve features. In this setting, shape matching is performed by minimizing an objective function with constraints, which respect landmark correspondences. Currently, the minimizer in this approach is found using piecewise dynamic programming; this does not respect the smoothness requirement of the matching function. Thus, the solution is not really a member of the group of registration functions. In this work, we present a landmark-constrained gradient descent algorithm, which searches for a smooth matching function and respects landmark locations. We compare the proposed method to the previously used approach using examples from the MPEG-7 dataset.
统计形状分析中的一个重要问题是几何特征的匹配,即配准。简而言之,给定两个物体,人们想知道一个形状上的点与另一个形状上的点的对应关系。无论形状的数学表示如何,这种具有不同复杂程度的匹配问题都是存在的。最近的一种n维曲线形状分析框架将无限维函数曲线表示与重要曲线特征的地标信息编码相结合。在这种情况下,形状匹配是通过最小化具有约束的目标函数来执行的,这些约束尊重地标对应。目前,这种方法的最小值是用分段动态规划方法求出来的;这不符合匹配函数的平滑要求。因此,该解决方案实际上不是注册函数组的成员。在这项工作中,我们提出了一种地标约束梯度下降算法,该算法搜索平滑匹配函数并尊重地标位置。我们使用来自MPEG-7数据集的示例将所提出的方法与先前使用的方法进行比较。
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引用次数: 2
Real-time recognition of suicidal behavior using an RGB-D camera 用RGB-D摄像头实时识别自杀行为
Bo Li, W. Bouachir, Rafik Gouiaa, R. Noumeir
Inmates in solitary confinement may attempt to harm themselves in many ways, resulting in trivial to mortal injuries. In this context, suicide by hanging is one of the major causes of death among the incarcerated. The Rapid detection of suicide can reduce the mortality rate. Recently, several technologies have been developed to detect suicide by hanging attempts, but most of them use bulky devices, or they are greatly depending on human attention. In this paper, we propose a computer vision based system to automatically detect suicide by hanging attempts. Our method is based on modeling suicidal actions using pose and motion features, by exploiting the body joints' positions. The proposed video surveillance system analyses depth images provided by an RGB-D camera to detect the event of interest in real-time, regardeless of illumination conditions. The experimental results obtained on a realistic dataset demonstrated the high precision of our system in detecting suicide by hanging.
单独监禁的囚犯可能会试图以多种方式伤害自己,造成轻微甚至致命的伤害。在这种情况下,上吊自杀是囚犯死亡的主要原因之一。快速发现自杀可以降低死亡率。最近,已经开发了几种检测上吊自杀企图的技术,但大多数技术使用笨重的设备,或者很大程度上依赖于人类的注意力。本文提出了一种基于计算机视觉的上吊自杀自动检测系统。我们的方法是通过利用身体关节的位置,利用姿势和运动特征来建模自杀行为。提出的视频监控系统分析由RGB-D摄像机提供的深度图像,以实时检测感兴趣的事件,而不考虑照明条件。在一个真实数据集上的实验结果表明,我们的系统在检测上吊自杀方面具有很高的精度。
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引用次数: 3
JPEG compression model in copy-move forgery detection 复制-移动伪造检测中的JPEG压缩模型
Adam Novozámský, M. Šorel
The integrity of visual data is important for the credibility of news media and especially when used as an evidence in court or during criminal investigation. The common way to manipulate image content is copying an object and pasting in another location of the same image. In this paper, we describe a new idea for the detection of this type of forgery in JPEG images, where the compression significantly degrades detection by popular algorithms. We derive a JPEG-based constraint that any pair of patches must satisfy to be considered a valid candidate for tampered area. We propose also efficient algorithm to verify the constraint that can be integrated into most existing methods. Experiments show significant improvement of detection, especially for difficult cases, such as small objects, objects covered by textureless areas and repeated patterns.
视觉数据的完整性对于新闻媒体的可信度非常重要,特别是在法庭或刑事调查期间用作证据时。操作图像内容的常用方法是复制对象并将其粘贴到同一图像的另一个位置。在本文中,我们描述了一种在JPEG图像中检测此类伪造的新思路,其中压缩显着降低了常用算法的检测。我们导出了一个基于jpeg的约束,任何一对补丁必须满足被认为是篡改区域的有效候选。我们还提出了一种有效的算法来验证约束,这种算法可以集成到大多数现有的方法中。实验结果表明,该方法在识别小物体、被无纹理区域覆盖的物体和重复图案等困难情况下,具有显著的提高。
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引用次数: 2
A deep learning approach for detecting and correcting highlights in endoscopic images 一种用于检测和纠正内窥镜图像高光的深度学习方法
A. Rodríguez-Sánchez, D. Chea, G. Azzopardi, Sebastian Stabinger
The image of an object changes dramatically depending on the lightning conditions surrounding that object. Shadows, reflections and highlights can make the object very difficult to be recognized for an automatic system. Additionally, images used in medical applications, such as endoscopic images and videos contain a large amount of such reflective components. This can pose an extra difficulty for experts to analyze such type of videos and images. It can then be useful to detect — and possibly correct — the locations where those highlights happen. In this work we designed a Convolutional Neural Network for that task. We trained such a network using a dataset that contains groundtruth highlights showing that those reflective elements can be learnt and thus located and extracted. We then used that trained network to localize and correct the highlights in endoscopic images from the El Salvador Atlas Gastrointestinal videos obtaining promising results.
物体的图像会随着物体周围的闪电条件而发生巨大变化。阴影、反射和高光会使物体很难被自动系统识别。此外,在医疗应用中使用的图像,如内窥镜图像和视频包含大量的这种反射成分。这给专家分析这类视频和图像带来了额外的困难。然后,它可以用来检测——并可能纠正——这些高光发生的位置。在这项工作中,我们为这项任务设计了一个卷积神经网络。我们使用包含基础事实亮点的数据集来训练这样的网络,表明这些反射元素可以被学习,从而定位和提取。然后,我们使用该训练网络来定位和纠正来自萨尔瓦多Atlas胃肠道视频的内窥镜图像中的亮点,获得了令人满意的结果。
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引用次数: 13
A computer vision method for respiratory monitoring in intensive care environment using RGB-D cameras 采用RGB-D摄像机进行重症监护环境呼吸监测的计算机视觉方法
H. Rehouma, R. Noumeir, P. Jouvet, W. Bouachir, S. Essouri
This paper presents a novel computer vision method to measure the breathing pattern in intensive care environment. The proposed system uses depth information captured by two RGB-D cameras in order to reconstruct a 3D surface of a patient's torso with a high spatial coverage. The optimal positioning for the sensors is a key step to perform an accurate 3D reconstruction without interfering with patient care. In this context, our hardware setup meets the clinical requirements while allowing accurate estimation of respiratory parameters including respiratory rate, tidal volume and inspiratory time. Our system provides the motion information not only for the top of the torso surface but also for its both lateral sides. Our method was tested in an environment designed for critically ill children, where it was compared to the gold standard method currently used in intensive care units. The performed experiments yielded high accuracy and showed significant agreement with gold standard method.
本文提出了一种新的计算机视觉方法来测量重症监护环境下的呼吸模式。该系统使用两个RGB-D相机捕获的深度信息,以重建具有高空间覆盖率的患者躯干的3D表面。传感器的最佳定位是在不干扰患者护理的情况下进行精确3D重建的关键步骤。在这种情况下,我们的硬件设置满足临床要求,同时允许准确估计呼吸参数,包括呼吸频率,潮气量和吸气时间。我们的系统不仅提供躯干表面的运动信息,还提供躯干两侧的运动信息。我们的方法在为危重儿童设计的环境中进行了测试,并与目前在重症监护病房使用的金标准方法进行了比较。实验结果与金标准法具有较高的准确度和一致性。
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引用次数: 9
期刊
2017 Seventh International Conference on Image Processing Theory, Tools and Applications (IPTA)
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