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2017 IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI)最新文献

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A robust gait recognition system using spatiotemporal features and deep learning 基于时空特征和深度学习的鲁棒步态识别系统
Md. Zia Uddin, W. Khaksar, J. Tørresen
Gait recognition plays a very vital role in many practical applications of computer and robot vision in smart environments such as health care for elderly using smart home technology. Hence, it has been attracting considerable attentions from many machine vision researchers in last decades. In this paper, we propose a novel method for depth video-based gait recognition using robust features and deep learning. Local Directional Pattern (LDP) features are first extracted from depth silhouettes. Then, LDP features are augmented with optical flow motion features to generate spatiotemporal robust features. The features are then applied on a Convolutional Neural Network (CNN) for training and recognition. The proposed method outperforms the conventional gait recognition approaches. This system can contribute in various practical applications such as observing elderly peoples' gait patterns in smart homes or hospitals.
步态识别在计算机和机器人视觉在智能环境中的许多实际应用中起着非常重要的作用,例如使用智能家居技术的老年人医疗保健。因此,在过去的几十年里,它已经引起了许多机器视觉研究者的极大关注。在本文中,我们提出了一种利用鲁棒特征和深度学习的基于视频的深度步态识别新方法。首先从深度轮廓中提取局部方向模式(LDP)特征。然后,将LDP特征与光流运动特征进行增强,生成时空鲁棒特征;然后将这些特征应用于卷积神经网络(CNN)进行训练和识别。该方法优于传统的步态识别方法。该系统可以在智能家居或医院中观察老年人的步态模式等各种实际应用中做出贡献。
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引用次数: 11
A grid-based indoor radiolocation technique based on spatially coherent path loss model 一种基于空间相干路径损耗模型的网格室内无线电定位技术
Murat Ambarkutuk, T. Furukawa
This paper presents a grid-based indoor radiolocation technique based on a Spatially Coherent Path Loss Model (SCPL). Received Signal Strength (RSS) fingerprints are collected at different positions in the environment from which the radio wave propagation for the environment is empirically approximated with the SCPL model. Unlike the conventional path loss models, SCPL approximates radio wave propagation by first dividing the localization environment into grid cells and estimating the model parameters for each grid cell. Thus, the proposed technique is able to account for attenuation, resulting from non-uniform environmental irregularities. The efficacy of the proposed technique was investigated with an experiment comparing SCPL and an indoor radiolocation technique based on a conventional path loss model. The comparison has indicated the improved performance of the SCPL by up to 44%.
提出了一种基于空间相干路径损耗模型(SCPL)的网格室内无线电定位技术。在环境的不同位置收集接收信号强度(RSS)指纹,并利用SCPL模型对该环境的无线电波传播进行经验近似。与传统的路径损耗模型不同,SCPL通过首先将定位环境划分为网格单元并估计每个网格单元的模型参数来近似无线电波传播。因此,所提出的技术能够解释由不均匀的环境不规则性引起的衰减。通过比较SCPL和基于传统路径损耗模型的室内无线电定位技术的实验,研究了该技术的有效性。比较表明,SCPL的性能提高了44%。
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引用次数: 0
An integrated UAV navigation system based on geo-registered 3D point cloud 基于地理配准三维点云的无人机综合导航系统
Shuai Zhang, Shuaijun Wang, Chengyang Li, Guocheng Liu, Qi Hao
The autonomous navigation of unmanned aerial vehicles (UAVs) require a lot of sensing modalities to improve their cruise efficiency. This paper presents a system for autonomous navigation and path planning of UAVs in GPS-denied environment based on the fusion of geo-registered 3D point clouds with proprioceptive sensors (IMU, odometry and barometer) and the 2D Google maps. The contributions of this paper are illustrated as follows: 1) combination of 2D map and geo-registered 3D point clouds; 2) registration of local point cloud to global geo-registered 3D point clouds; 3) integration of visual odometry, IMU, GPS and barometer. Experiment and simulation results demonstrate the efficacy and robustness of the proposed system.
为了提高无人机的巡航效率,无人机的自主导航需要大量的传感方式。本文提出了一种基于地理配准三维点云与本体感知传感器(IMU、里程计和气压计)和二维谷歌地图融合的gps环境下无人机自主导航和路径规划系统。本文的贡献主要体现在:1)结合二维地图和地理配准的三维点云;2)局部点云配准到全局地理配准的三维点云;3)视觉里程计、IMU、GPS和气压计的集成。实验和仿真结果验证了该系统的有效性和鲁棒性。
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引用次数: 2
Data association — solution or avoidance: Evaluation of a filter based on RFS framework and factor graphs with SME 数据关联-解决或避免:基于RFS框架和SME因子图的过滤器评估
Dhiraj Gulati, Uzair Sharif, Feihu Zhang, Daniel Clarke, A. Knoll
Data or measurement-to-track association is an integral and expensive part of any solution performing multi-target multi-sensor Cooperative Localization (CL) for better state estimation. Various performance evaluations have been performed between various state-of-the-art solutions, but they have been often limited within same family of algorithms. However, there exist solutions which avoid the task of data association to perform the CL in a multi-target multi-sensor environment. Factor Graphs using Symmetric Measurement Equations (SMEs) factor is one such solution. In this paper we compare and contrast the state estimation using state-of-the-art Random Finite Set (RFS) approach and using a Factor Graph solution with SMEs. For a RFS we use multi-sensor multi-object with the Generalized Labeled Multi-Bernoulli (GLMB) Filter. These two solution use conceptually different approaches, GLMB Filter solves the data association implicitly, but Factor Graph based solution avoids the task altogether. Simulations present an interesting results where for simple scenarios implemented GLMB filter performs efficiently. But the performance of GLMB Filter degrades faster than Factor Graphs using SMEs when the error in the sensors increase.
数据或测量-跟踪关联是执行多目标多传感器协同定位(CL)以获得更好的状态估计的任何解决方案中不可或缺且昂贵的一部分。在各种最先进的解决方案之间进行了各种性能评估,但它们通常受限于同一类算法。然而,在多目标多传感器环境下,已有解决方案可以避免数据关联任务来执行CL。利用对称测量方程(SMEs)的因子图就是这样一种解决方案。在本文中,我们比较和对比了使用最先进的随机有限集(RFS)方法和使用中小企业的因子图解决方案的状态估计。对于RFS,我们使用了多传感器多目标和广义标记多伯努利(GLMB)滤波器。这两种解决方案使用了概念上不同的方法,GLMB Filter隐式地解决了数据关联,而基于因子图的解决方案完全避免了这个任务。仿真显示了一个有趣的结果,在简单的场景中实现的GLMB滤波器可以有效地执行。但当传感器误差增加时,GLMB滤波器的性能比使用sme的因子图下降得更快。
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引用次数: 2
Discretization of SO(3) using recursive tesseract subdivision 用递推tesseract细分的SO(3)离散化
G. Kurz, F. Pfaff, U. Hanebeck
The group of rotations in three dimensions SO(3) plays a crucial role in applications ranging from robotics and aeronautics to computer graphics. Rotations have three degrees of freedom, but representing rotations is a nontrivial matter and different methods, such as Euler angles, quaternions, rotation matrices, and Rodrigues vectors are commonly used. Unfortunately, none of these representations allows easy discretization of orientations on evenly spaced grids. We present a novel discretization method that is based on a quaternion representation in conjunction with a recursive subdivision scheme of the four-dimensional hypercube, also known as the tesseract.
三维SO(3)中的旋转组在从机器人、航空到计算机图形学的应用中起着至关重要的作用。旋转有三个自由度,但表示旋转是一件很重要的事情,不同的方法,如欧拉角、四元数、旋转矩阵和罗德里格斯向量是常用的。不幸的是,这些表示都不允许在均匀间隔的网格上容易地离散方向。我们提出了一种新的离散化方法,该方法基于四元数表示,并结合了四维超立方体(也称为tesseract)的递归细分方案。
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引用次数: 1
Fast point cloud segmentation based on flood-fill algorithm 基于洪水填充算法的快速点云分割
P. Chu, Seoungjae Cho, Y. Park, Kyungeun Cho
With the aim of providing a fast and effective segmentation method based on the flood-fill algorithm, in this study, we propose a new approach to segment a 3D point cloud gained by a 3D multi-channel laser range sensor into different objects. First, we divide the point cloud into two groups: ground and nonground points. Next, we segment clusters in each scanline dataset from the group of nonground points. Each scanline cluster is joined with other scanline clusters using the flood-fill algorithm. In this manner, each group of scanline clusters represents an object in the 3D environment. Finally, we obtain each object separately. Experiments show that our method has the ability to segment objects accurately and in real time.
为了提供一种基于洪水填充算法的快速有效的分割方法,在本研究中,我们提出了一种新的方法,将三维多通道激光距离传感器获得的三维点云分割成不同的目标。首先,我们将点云分为地面点和非地面点两组。接下来,我们从非地面点组中分割每个扫描线数据集中的聚类。每个扫描线集群使用洪水填充算法与其他扫描线集群连接。通过这种方式,每组扫描线簇表示3D环境中的一个对象。最后,分别获得每个对象。实验表明,该方法具有准确、实时的目标分割能力。
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引用次数: 17
Light-weight semantic segmentation for compound images 复合图像的轻量级语义分割
Geonho Cha, Hwiyeon Yoo, Donghoon Lee, Songhwai Oh
The eye structure of insects, which is called a compound eye, has interesting advantages. It has a large field of view, low aberrations, compact size, short image processing time, and an infinite depth of field. If we can design a compound eye camera which mimics the compound eye structure of insects, compound images with these interesting advantages can be obtained. In this paper, we consider the design of a compound camera prototype and low complexity semantic segmentation scheme for compound images. The prototype has a hemisphere shape and consists of several synchronized single-lens reflex camera modules. Images captured from camera modules are mapped to compound images using multi-view geometry to emulate a compound eye. In this way, we can simulate various configurations of compound eye structures, which is useful for developing high-level applications. After that, a low complexity semantic segmentation scheme for compound images based on a convolutional neural network is proposed. The experimental result shows that compound images are more suitable for semantic segmentation than typical RGB images.
昆虫的眼睛结构被称为复眼,它有一些有趣的优点。它具有视场大、像差低、体积小、图像处理时间短、无限景深等特点。如果我们能设计出一种模仿昆虫复眼结构的复眼相机,就可以获得具有这些有趣优点的复合图像。在本文中,我们考虑设计一种复合相机原型和低复杂度的复合图像语义分割方案。原型机是一个半球形状,由几个同步的单镜头反射相机模块组成。从相机模块捕获的图像被映射到使用多视图几何模拟复眼的复合图像。通过这种方式,我们可以模拟复眼结构的各种形态,这对开发高级应用程序很有帮助。在此基础上,提出了一种基于卷积神经网络的低复杂度复合图像语义分割方案。实验结果表明,复合图像比典型RGB图像更适合语义分割。
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引用次数: 2
Experimental Study on Image Interpolation for Concealed Object Detection 图像插值用于隐藏目标检测的实验研究
Dokkyun Yi, Su-yeon Kim, S. Yeom, Mun-Kyo Lee, Sang-Won Jung
Millimeter wave (MMW) readily penetrates fabrics, thus it can be used to detect objects concealed under clothing. A passive MMW imaging system can operate as a stand-off type sensor that scans people away from the system. However, the image often suffers from low image quality due to the diffraction limit and low signal level. In the paper, we discuss four image interpolation methods to recognize objects hidden in the clothing of a person. The first method is the bi-cubic with Gaussian smooth filtering, the second is the Lagrangian, the third is the cubic spline, and the last is the Weighted Essentially Non-Oscillatory (WENO) interpolation. In the experiment, a person hiding a metallic gun in the clothing is captured by the passive MMW system. The experimental results show the interpolation methods can enhance the gun object for segmentation and recognition.
毫米波(MMW)很容易穿透织物,因此可以用来检测隐藏在衣服下的物体。无源毫米波成像系统可以作为一种隔离型传感器,将人从系统中扫描出来。然而,由于衍射极限和低信号电平,图像经常遭受低图像质量。本文讨论了四种图像插值方法来识别隐藏在人体服装中的物体。第一种方法是双三次高斯平滑滤波法,第二种是拉格朗日插值法,第三种是三次样条插值法,最后一种是加权非振荡插值法。在实验中,一个人把金属枪藏在衣服里,被动式毫米波系统就能捕捉到。实验结果表明,所提出的插值方法可以增强对枪目标的分割和识别能力。
{"title":"Experimental Study on Image Interpolation for Concealed Object Detection","authors":"Dokkyun Yi, Su-yeon Kim, S. Yeom, Mun-Kyo Lee, Sang-Won Jung","doi":"10.1109/MFI.2017.8170370","DOIUrl":"https://doi.org/10.1109/MFI.2017.8170370","url":null,"abstract":"Millimeter wave (MMW) readily penetrates fabrics, thus it can be used to detect objects concealed under clothing. A passive MMW imaging system can operate as a stand-off type sensor that scans people away from the system. However, the image often suffers from low image quality due to the diffraction limit and low signal level. In the paper, we discuss four image interpolation methods to recognize objects hidden in the clothing of a person. The first method is the bi-cubic with Gaussian smooth filtering, the second is the Lagrangian, the third is the cubic spline, and the last is the Weighted Essentially Non-Oscillatory (WENO) interpolation. In the experiment, a person hiding a metallic gun in the clothing is captured by the passive MMW system. The experimental results show the interpolation methods can enhance the gun object for segmentation and recognition.","PeriodicalId":402371,"journal":{"name":"2017 IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122443783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Facility activity inference using networks of radiation detectors based on SPRT 基于SPRT的辐射探测器网络的设施活动推断
N. Rao, C. Ramirez
We consider the problem of inferring the operational status of a reactor facility using measurements from a radiation sensor network deployed around the facility's ventilation off-gas stack. The intensity of stack emissions decays with distance, and the sensor counts or measurements are inherently random with parameters determined by the intensity at the sensor's location. We utilize the measurements to estimate the intensity at the stack, and use it in a one-sided Sequential Probability Ratio Test (SPRT) to infer on/off status of the reactor. We demonstrate the superior performance of this method over conventional majority fusers and individual sensors using (i) test measurements from a network of 21 NaI detectors, and (ii) effluence measurements collected at the stack of a reactor facility. We also analytically establish the superior detection performance of the network over individual sensors with fixed and adaptive thresholds by utilizing the Poisson distribution of the counts. We quantify the performance improvements of the network detection over individual sensors using the packing number of the intensity space.
我们考虑了利用部署在反应堆通风废气烟囱周围的辐射传感器网络的测量来推断反应堆设施运行状态的问题。堆栈发射强度随距离衰减,传感器计数或测量本身是随机的,其参数由传感器位置的强度决定。我们利用测量值来估计堆栈处的强度,并将其用于单侧顺序概率比测试(SPRT)来推断反应器的开/关状态。我们使用(i)来自21个NaI探测器网络的测试测量,以及(ii)在反应堆设施堆栈收集的流出物测量,证明了该方法优于传统的大多数熔断器和单个传感器的性能。我们还利用计数的泊松分布,分析地建立了网络对具有固定阈值和自适应阈值的单个传感器的优越检测性能。我们使用强度空间的包装数来量化网络检测对单个传感器的性能改进。
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引用次数: 0
Image-based multi-target tracking using a multi-layer particle filter and extended EM clustering 基于多层粒子滤波和扩展EM聚类的图像多目标跟踪
J. Buyer, M. Vollert, Mihai Kocsis, Nico Susmann, R. Zöllner
The paper presents an approach for tracking a variable number of objects by using a multi-layer particle filter combined with an extended Expectation Maximization (EM) clustering. The approach works on basis of binary foreground images coming from previous background subtraction. The multi-layer particle filter is an improvement of a conventional particle filter approach. It uses an introduced adaptive layer distribution spanned over the tracking area, which determines the areal extents of the particles. Thus, the multi-modal posterior distribution representing the objects is approximated with locally different resolutions. In addition, the layer distribution is used to find new appearing objects. In order to generate an object list out of the particle density, an EM clustering is used. The basic algorithm is extended with an estimation of the needful number of clusters by iteratively splitting and comparing the overall cluster areas. The new tracking approach improves tracking quality and robustness compared to the conventional particle filter approach. Experimental results are shown using the example of a traffic scene in a roundabout.
本文提出了一种结合扩展期望最大化聚类的多层粒子滤波方法来跟踪可变数量的目标。该方法是基于之前的背景减法得到的二值前景图像。多层粒子滤波是对传统粒子滤波方法的改进。它使用一个引入的自适应层分布跨越跟踪区域,这决定了粒子的面积范围。因此,代表目标的多模态后验分布近似于局部不同的分辨率。此外,层分布用于发现新出现的对象。为了从粒子密度中生成目标列表,使用了EM聚类。对基本算法进行了扩展,通过迭代分割和比较整个聚类区域来估计所需的聚类数量。与传统的粒子滤波方法相比,新的跟踪方法提高了跟踪质量和鲁棒性。以环岛交通场景为例,给出了实验结果。
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引用次数: 1
期刊
2017 IEEE International Conference on Multisensor Fusion and Integration for Intelligent Systems (MFI)
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