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RAS: Recursive automotive stereo RAS:递归式汽车立体声
Pub Date : 2014-06-08 DOI: 10.1109/IVS.2014.6856481
Sebastian Schneider, G. Mueller, Jan Kallwies, Hans-Joachim Wünsche
Obstacle avoidance is a key feature for automotive navigation that requires an accurate representation of the environment. In the field of visual perception this task has often been addressed with stereo algorithms that try to obtain a depth map of the environment via disparity calculations on a single pair of images. These algorithms do not exploit that especially in automotive scenarios the fields of view between two consecutive frames have large overlapping regions. Instead, the disparity map is computed from scratch for each stereo frame and no information is propagated from one frame to the next. Since monocular image processing has long benefited from recursive estimation techniques, such as the 4D Approach, this paper presents a novel recursive automotive stereo algorithm, called RAS. RAS internally maintains a list of recursively estimated 3D points that are continuously updated based on the vehicle's movement and measurements in the current stereo frame. We show that RAS not only preserves the knowledge of the environment across frames, but also accounts for measurement modalities and is robust against faulty or even missing measurements.
避障是汽车导航的一个关键功能,它需要准确地表示环境。在视觉感知领域,这项任务通常通过立体算法来解决,立体算法试图通过对单个图像的视差计算来获得环境的深度图。这些算法没有利用特别是在汽车场景中,两个连续帧之间的视场有很大的重叠区域。相反,视差图是为每个立体帧从头开始计算的,没有信息从一帧传播到下一帧。由于单眼图像处理长期受益于递归估计技术,如4D方法,本文提出了一种新的递归汽车立体算法,称为RAS。RAS内部维护一个递归估计的3D点列表,该列表根据车辆的运动和当前立体框架中的测量值不断更新。我们表明RAS不仅保留了跨框架的环境知识,而且还考虑了测量模式,并且对错误甚至缺失的测量具有鲁棒性。
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引用次数: 3
A support vector machine approach to unintentional vehicle lane departure prediction 基于支持向量机的非故意车道偏离预测
Pub Date : 2014-06-08 DOI: 10.1109/IVS.2014.6856602
A. Albousefi, H. Ying, Dimitar Filev, F. Syed, K. Prakah-Asante, F. Tseng, Hsin-Hsiang Yang
Advanced driver assistance systems, such as unintentional lane departure warning systems, have recently drawn much attention and R & D efforts. Such a system may assist the driver by monitoring the driver or vehicle behaviors to predict/detect driving situations (e.g, lane departure) and alert the driver to take corrective action. In this paper, we show how the support vector machine (SVM) methodology can potentially provide enhanced unintentional lane departure prediction, which is a new method relative to literature. Our binary SVM employed the Radial Basis Function kernel to classify time series of select vehicle variables. The SVM was trained and tested using the driver experiment data generated by VIRTTEX, a hydraulically powered 6-degrees-of-freedom moving base driving simulator at Ford Motor Company. The data that we used represented 16 drowsy subjects (three-hour driving time per subject) and six control subjects (20 minutes driving per subject), all of which drove a simulated 2000 Volvo S80. The vehicle variables were all sampled at 50 Hz. There were a total of 3,508 unintentional lane departure occurrences for the drowsy drivers and only 23 for four of the six control drivers (two had none). The SVM was trained by over 60,000 time series examples (the actual number depended on the prediction horizon) created from 50% of the lane departures. The training data were removed from the testing data. During the testing, the SVM made a lane departure prediction at every sampling time for every one of the 22 drivers (over 6.8 million predictions in total). The overall sensitivity and specificity of the SVM with a 0.2-second prediction horizon for the 22 drivers were 99.77465% and 99.99997%, respectively. The SVM predicted, on average 0.200181 seconds in advance, lane departure correctly for all the control drivers, but missed 4 of the 1,758 and gave false positives for another 2 for the drowsy drivers. For the prediction horizon of 0.4s, there was 1 false positive case for the control subjects, and the false negative and false positive cases rose substantially to 10 and 137 for the drowsy drivers, respectively.
先进的驾驶辅助系统,如意外车道偏离预警系统,最近引起了很多关注和研发努力。这样的系统可以通过监控驾驶员或车辆行为来帮助驾驶员预测/检测驾驶情况(例如,车道偏离),并提醒驾驶员采取纠正措施。在本文中,我们展示了支持向量机(SVM)方法如何潜在地提供增强的无意车道偏离预测,这是一种相对于文献的新方法。我们的二元支持向量机采用径向基函数核对所选车辆变量的时间序列进行分类。使用福特汽车公司的液压六自由度移动基座驾驶模拟器VIRTTEX生成的驾驶员实验数据对SVM进行训练和测试。我们使用的数据代表了16名昏昏欲睡的受试者(每个受试者驾驶时间为3小时)和6名对照受试者(每个受试者驾驶时间为20分钟),他们都驾驶一辆模拟的2000沃尔沃S80。车辆变量均以50 Hz采样。昏昏欲睡的司机共发生了3,508起意外偏离车道事件,而6名对照司机中的4名(2名没有)只有23起。支持向量机通过从50%的车道偏离中创建的60,000多个时间序列示例(实际数量取决于预测范围)进行训练。将训练数据从测试数据中删除。在测试过程中,SVM在每个采样时间对22个驾驶员中的每一个驾驶员进行车道偏离预测(总计超过680万次预测)。在0.2 s预测水平下,支持向量机对22个驾驶员的总体敏感性和特异性分别为99.77465%和99.99997%。支持向量机平均提前0.200181秒正确预测了所有控制驾驶员的车道偏离,但错过了1758个驾驶员中的4个,并且对昏昏欲睡的驾驶员给出了另外2个误报。在0.4s的预测范围内,对照组有1例假阳性,而疲劳驾驶组的假阴性和假阳性分别大幅上升至10例和137例。
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引用次数: 13
Experiences from implementing the ETSI ITS SecuredMessage service 实施ETSI ITS SecuredMessage服务的经验
Pub Date : 2014-06-08 DOI: 10.1109/IVS.2014.6856587
Nasser Nowdehi, T. Olovsson
Cooperative intelligent transport systems supporting secure vehicle to vehicle and vehicle to infrastructure communications, is becoming a very important topic. The aim of this paper is to share our experiences from implementing the ETSI Intelligent Transport System (ITS) SecuredMessage and sign/verify services on an existing ETSI ITS communication stack (ITSC). We have followed the new ETSI TS 103 097 v1.1.1 standard when implementing the security services, and have made our best to create a robust and secure implementation. Our goal has been to identify flaws and vulnerabilities in our implementation that are caused by weaknesses or deficiencies in the standard and in its description of services. We have then performed an analysis of the protocol, its headers and created test cases used to test our implementation. Several problems were found, and we have also repeated the tests with another, supposedly very stable implementation, provided by Fraunhofer FOKUS. To our surprise, this system also showed unexpected behavior as our system. We show that these problems are the result of weaknesses and complexities in the design of the standard. We present the problems found in our implementation and show what part in the standard was causing the problems. We show that several problems in the standard, mainly due to their complexity, open up for misinterpretation leading to various types of implementation errors. We conclude the paper with proposing changes to the standard to prevent other implementations from repeating the same mistakes.
协同智能交通系统支持安全的车与车、车与基础设施通信,正成为一个非常重要的课题。本文的目的是分享我们在现有的ETSI智能交通系统通信堆栈(ITSC)上实施ETSI智能交通系统(ITS)安全消息和签署/验证服务的经验。在实现安全服务时,我们遵循新的ETSI TS 103 097 v1.1.1标准,并尽最大努力创建一个健壮且安全的实现。我们的目标是识别我们实现中的缺陷和漏洞,这些缺陷和漏洞是由标准及其服务描述中的弱点或缺陷引起的。然后,我们对协议、它的头进行了分析,并创建了测试用例来测试我们的实现。发现了几个问题,我们也用Fraunhofer FOKUS提供的另一个应该非常稳定的实现重复了测试。令我们惊讶的是,这个系统也像我们的系统一样表现出意想不到的行为。我们表明,这些问题是由于标准设计中的弱点和复杂性造成的。我们提出了在我们的实现中发现的问题,并展示了标准中的哪个部分导致了问题。我们展示了标准中的几个问题,主要是由于它们的复杂性,导致了误解,导致了各种类型的实现错误。最后,我们提出了对标准的修改建议,以防止其他实现重复同样的错误。
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引用次数: 15
Driver- and situation-specific impact factors for the energy prediction of EVs based on crowd-sourced speed profiles 基于众包速度曲线的电动汽车能量预测的驾驶员和情境特定影响因子
Pub Date : 2014-06-08 DOI: 10.1109/IVS.2014.6856501
S. Grubwinkler, Martin Hirschvogel, M. Lienkamp
This paper presents a system for the prediction of the necessary energy for selected trips of electric vehicles (EVs), which can be used for various EV assistants like range estimation. We use statistical features extracted from crowd-sourced speed profiles for the energy prediction, since they consider the varying impact factors of the individual driving style and the prevailing traffic condition. A statistical prediction model uses these features in order to predict the deviation from the mean energy consumption of the EV. Hence, the model predicts the variance of energy consumption caused for example by individual driving behavior. The results show an improvement of the energy prediction by 5.4 percentage points if the statistical features are considered. The prediction of the propulsion energy for EVs before the start of a given route has a relative mean error of 6.8%.
本文提出了一种预测电动汽车选择行程所需能量的系统,该系统可用于各种电动汽车辅助,如里程估计。我们使用从人群源速度曲线中提取的统计特征进行能量预测,因为它们考虑了个人驾驶风格和当前交通状况的不同影响因素。统计预测模型利用这些特征来预测电动汽车的平均能耗偏差。因此,该模型预测了个体驾驶行为等引起的能源消耗方差。结果表明,如果考虑统计特征,能量预测提高了5.4个百分点。在给定路线出发前对电动汽车推进能量的预测相对平均误差为6.8%。
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引用次数: 19
Performance characteristics for automated driving of long heavy vehicle combinations evaluated in motion simulator 在运动模拟器中评估了长重型车辆组合自动驾驶的性能特征
Pub Date : 2014-06-08 DOI: 10.1109/IVS.2014.6856393
Peter Nilsson, L. Laine, B. Jacobson
This paper presents a driving simulator experiment in which manual and automated driving of a prospective long vehicle combination has been studied. Based on post analysis of manual and automated driving trajectories, characteristic measures reflecting the manual drivers behavior have been proposed. It was observed that the drivers had a round shape of the utilized accelerations while negotiating the curves. A similar shape was found when using an objective function which included minimizing the resultant jerk vector.
本文通过驾驶模拟器实验,研究了一种前瞻性长车组合的手动驾驶和自动驾驶。在对手动驾驶和自动驾驶轨迹进行事后分析的基础上,提出了反映手动驾驶行为的特征测度。可以观察到,驾驶员在通过弯道时所利用的加速度呈圆形。当使用目标函数时,也发现了类似的形状,该目标函数包括最小化产生的震动矢量。
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引用次数: 7
Map-relative localization in lane-level maps for ADAS and autonomous driving 面向ADAS和自动驾驶的车道级地图的地图相对定位
Pub Date : 2014-06-08 DOI: 10.1109/IVS.2014.6856428
Richard Matthaei, Gerrit Bagschik, M. Maurer
Future advanced driver assistant systems put high demands on the environmental perception especially in urban environments. Today's on-board sensors and on-board algorithms still do not reach a satisfying level of development from the point of view of robustness and availability. Thus, map data is often used as an additional data input to support the on-board sensor system and algorithms. The usage of map data requires a highly correct pose within the map even in cases of positioning errors by global navigation satellite systems or geometrical errors in the map data. In this paper we propose and compare two approaches for map-relative localization exclusively using a lane-level map. These approaches deliberately avoid the usage of detailed a priori maps containing point-landmarks, grids or road-markings. Additionally, we propose a grid-based on-board fusion of road-marking information and stationary obstacles addressing the problem of missing or incomplete road-markings in urban scenarios.
未来的高级驾驶辅助系统对环境感知提出了更高的要求,尤其是在城市环境中。从鲁棒性和可用性的角度来看,目前的车载传感器和车载算法还没有达到令人满意的发展水平。因此,地图数据通常被用作额外的数据输入,以支持车载传感器系统和算法。即使在全球导航卫星系统的定位错误或地图数据的几何错误的情况下,使用地图数据也需要在地图内高度正确的姿态。在本文中,我们提出并比较了两种仅使用车道级地图的地图相对定位方法。这些方法故意避免使用包含点地标、网格或道路标记的详细先验地图。此外,我们提出了一种基于网格的道路标记信息和固定障碍物的车载融合方法,以解决城市场景中道路标记缺失或不完整的问题。
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引用次数: 42
Fast road detection and tracking in aerial videos 航拍视频中的快速道路检测和跟踪
Pub Date : 2014-06-08 DOI: 10.1109/IVS.2014.6856523
Hailing Zhou, Hui Kong, J. Álvarez, D. Creighton, S. Nahavandi
We propose a fast approach for detecting and tracking a specific road in aerial videos. It combines adaptive Gaussian Mixture Models (GMMs) to describe road colour distributions, and homography based tracking to track road geometries, where an efficient technique is developed to estimate homography transformations between two frames. Experiments are conducted on videos captured by our unmanned aerial vehicles. All the results demonstrate the effectiveness of our proposed method. We test 1755 frames from 5 videos. Our approach can achieve 0.032 seconds per frame and 2.64% segmentation error for images with 908 × 513 resolutions, on average.
我们提出了一种快速检测和跟踪航拍视频中特定道路的方法。它结合了自适应高斯混合模型(GMMs)来描述道路颜色分布,以及基于单应性的跟踪来跟踪道路几何形状,其中开发了一种有效的技术来估计两帧之间的单应性变换。实验是在我们的无人机拍摄的视频上进行的。所有的结果都证明了我们所提出的方法的有效性。我们测试了来自5个视频的1755帧。对于908 × 513分辨率的图像,我们的方法平均每帧可以实现0.032秒的分割,平均分割误差为2.64%。
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引用次数: 8
Connected Vehicle Enabled Freeway Merge Assistance system-field test: Preliminary results of driver compliance to advisory 联网车辆支持高速公路合并辅助系统-现场测试:驾驶员遵守咨询的初步结果
Pub Date : 2014-06-08 DOI: 10.1109/IVS.2014.6856608
Md Tanveer Hayat, Hyungjun Park, Brian L. Smith
The Connected Vehicle enabled Freeway Merge Assistance system is developed by the University of Virginia Center for Transportation Studies, with the aim of reducing conflicts between merging vehicles in freeway ramp area. Initial simulation evaluation results showed that the merge assistance system has significant potential to increase capacity of freeway merge areas and reduce accidents by minimizing the number of conflicts between vehicles. As a next step of evaluation, a field test is conducted at a Connected Vehicle test bed to investigate drivers' response to the personalized advisories relayed by this system. This paper provides an overview of the field test methodology, system architecture, stated preference survey and presents preliminary results for this prototype freeway merge assistance system developed for the Connected Vehicle Environment. The revealed and stated preference data gathered will be used to develop an advisory response model that will incorporate drivers' response variability in the simulation evaluation framework of the freeway merge assistance system.
高速公路合并辅助系统是由弗吉尼亚大学交通研究中心开发的,旨在减少高速公路匝道区域合并车辆之间的冲突。初步仿真评估结果表明,合流辅助系统在提高高速公路合流区通行能力和减少车辆间冲突数量方面具有显著的潜力。作为评估的下一步,将在互联汽车测试台上进行现场测试,以调查驾驶员对该系统传递的个性化建议的反应。本文概述了现场测试方法、系统架构、陈述偏好调查,并介绍了为互联汽车环境开发的高速公路合并辅助系统原型的初步结果。收集到的显示的和声明的偏好数据将用于开发一个咨询响应模型,该模型将在高速公路合并辅助系统的模拟评估框架中纳入驾驶员的响应可变性。
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引用次数: 11
Vehicle collision probability calculation for general traffic scenarios under uncertainty 不确定情况下一般交通场景下车辆碰撞概率计算
Pub Date : 2014-06-08 DOI: 10.1109/IVS.2014.6856430
James R. Ward, Gabriel Agamennoni, Stewart Worrall, E. Nebot
Vehicle-to-vehicle (V2V) communication systems allow vehicles to share state information with one another to improve safety and efficiency of transportation networks. One of the key applications of such a system is in the prediction and avoidance of collisions between vehicles. If a method to do this is to succeed it must be robust to measurement uncertainty. The method should also be general enough that it does not rely on constraints on vehicle motion for the accuracy of its predictions. It should work for all interactions between vehicles and not just a select subset. This paper presents a method for collision probability calculation that addresses these problems.
车对车(V2V)通信系统允许车辆之间共享状态信息,以提高交通网络的安全性和效率。该系统的关键应用之一是预测和避免车辆之间的碰撞。如果这样做的方法是成功的,它必须是健壮的测量不确定度。该方法还应具有足够的通用性,使其预测的准确性不依赖于车辆运动的约束。它应该适用于车辆之间的所有交互,而不仅仅是一个选定的子集。本文提出了一种计算碰撞概率的方法来解决这些问题。
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引用次数: 45
Pose detection in truck and trailer combinations for advanced driver assistance systems 用于高级驾驶员辅助系统的卡车和拖车组合的姿态检测
Pub Date : 2014-06-08 DOI: 10.1109/IVS.2014.6856547
Christian Fuchs, Simon Eggert, Benjamin Knopp, Dieter Zöbel
The knowledge about relative orientations between truck and trailer is a vital prerequisite for driver assistance systems especially when dealing with safety improvements for this kind of vehicles. Yet, no adequate system solving this problem is available. A sensor system measuring this desired state information by an optical approach is presented in this paper. The sensor system is evaluated using a virtual testbed that has been developed for testing, diagnosis and proper configuration of the sensor.
了解卡车和拖车之间的相对方向是驾驶员辅助系统的重要先决条件,特别是在处理这类车辆的安全改进时。然而,目前还没有足够的系统来解决这个问题。本文提出了一种用光学方法测量期望状态信息的传感器系统。利用已开发的用于传感器测试、诊断和适当配置的虚拟试验台对传感器系统进行了评估。
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引用次数: 10
期刊
2014 IEEE Intelligent Vehicles Symposium Proceedings
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