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2021 5th International Conference on Vision, Image and Signal Processing (ICVISP)最新文献

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Cooperative Navigation and Autonomous Formation Flight for a Swarm of Unmanned Aerial Vehicle 无人机群协同导航与自主编队飞行
Pub Date : 2021-12-01 DOI: 10.1109/ICVISP54630.2021.00046
Boudjit Kamel, Ammi Oussama
In recent years, thanks to the low cost of deploying, maintaining an Unmanned Aerial Vehicle (UAV) system and the possibility to operating them in areas inaccessible or dangerous for human pilots, UAVs have attracted much research attention in both the military field and civilian application. In order to deal with more sophisticated tasks, such as searching survival points, multiple target monitoring and tracking, the application of UAV swarms is for seen. This requires more complex control, communication and coordination mechanisms. However, these mechanisms are difficult to test and analyses under flight dynamic conditions. This paper presents recent examples from work in our research team on in incorporates leader-follower unmanned aerial vehicles using vision processing, radiofrequency data transmission. This system targets search and rescue environments, employing controls, vision processing, and embedded systems to allow for easy deployment of multiple quadrotor UAVs while requiring the control of only one. The system demonstrates a relative localization scheme for UAVs in a leader-follower configuration, allowing for predictive manoeuvres including path following.
近年来,由于无人机系统的部署和维护成本低,并且可以在人类飞行员无法进入或危险的区域操作,无人机在军事和民用领域都受到了广泛的关注。为了处理更复杂的任务,如搜索生存点,多目标监视和跟踪,无人机群的应用是可见的。这需要更复杂的控制、沟通和协调机制。然而,这些机制很难在飞行动态条件下进行测试和分析。本文介绍了我们研究小组最近在采用视觉处理、射频数据传输的领导-跟随型无人机上的工作实例。该系统针对搜索和救援环境,采用控制、视觉处理和嵌入式系统,允许轻松部署多架四旋翼无人机,同时只需要控制一架。该系统演示了一种领先-跟随配置的无人机相对定位方案,允许包括路径跟踪在内的预测性机动。
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引用次数: 1
A Digital Twin Based Design of the Semi-physical Marine Engine Room Simulator for Remote Maintenance Assistance 基于数字孪生的船舶机舱半物理模拟器的远程维修辅助设计
Pub Date : 2021-12-01 DOI: 10.1109/ICVISP54630.2021.00032
Yanghui Tan, Chunyang Niu, Hui Tian, Jun-dong Zhang
The semi-physical marine engine room simulator is one of the necessary equipment for the training of marine engineers worldwide. However, its maintenance has become a problem for a long time due to its complexity and vulnerability. Although the semi-physical marine engine room simulator fails frequently, its failures are usually small-scale communication failures, which are easy to solve for experts. For such kind of micro faults, the cost of field maintenance by experts is very high due to the long journey. Generally, most manufactures will choose to assist the users’ maintenance by telephone or email firstly. If it does not work, they will have to send experts for field maintenance which is expensive for users. In this paper, we propose a digital twin architecture of the semi-physical marine engine room simulator to assist users in remote maintenance. The digital twin system is a multi-twins architecture consisting of the user digital twin and the manufacturer digital twin. The user digital twin is a technical guidance platform for information reception and display, through which the user can get technical adviser from the experts in the 3D virtual environment. The manufacture digital twin is a platform for monitoring and troubleshooting by experts. The communication faults are the main faults of the semi-physical marine engine room simulator, which are easy to monitor. Consequently, it is possible to realize remote maintenance assistance through the digital twin system without a lot of time cost and economic cost.
船用机舱半物理模拟器是世界范围内轮机工程师培训的必备设备之一。然而,由于其复杂性和脆弱性,其维护长期以来一直是一个问题。虽然半物理舰船机舱模拟器故障频繁,但其故障多为小规模通信故障,专家容易解决。对于这类微故障,由于路途遥远,专家现场维修的费用非常高。一般情况下,大多数厂家都会选择先通过电话或电子邮件的方式协助用户进行维修。如果它不起作用,他们将不得不派遣专家进行现场维护,这对用户来说是昂贵的。在本文中,我们提出了一种半物理船舶机舱模拟器的数字孪生结构,以帮助用户进行远程维护。数字孪生系统是由用户数字孪生和制造商数字孪生组成的多孪生体系结构。用户数字孪生是信息接收和显示的技术指导平台,用户可以通过该平台在三维虚拟环境中获得专家的技术指导。制造数字孪生是一个由专家进行监控和故障排除的平台。通信故障是半物理船舶机舱模拟器的主要故障,是一种易于监控的故障。因此,通过数字孪生系统实现远程维护辅助是可能的,而不会产生大量的时间成本和经济成本。
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引用次数: 5
Development of a Droplet-Based Microfluidics Platform Toward Single-cell Analysis 基于微滴的单细胞分析微流体平台的开发
Pub Date : 2021-12-01 DOI: 10.1109/ICVISP54630.2021.00039
Ines Amokrane, K. Ngo
Isolating and analyzing a single cell remains a challenging task in both biological and medical researches since the analysis at the single-cell level offers great potential in gaining a unique insight in cellular activity. The aim of this work is to develop a lab-on-chip device that consists in a fully integrated droplet-based microfluidics platform devoted to real-time and single-cell analysis and capable of performing a sequence of several steps such as single cell encapsulation, droplet characterization, droplet sorting, droplet trapping and the analysis of droplets of interest. Only the results of the first part of this project is presented in this paper, in which we present a simple and fast standard microelectronic technique to fabricate the microfluidic platform. In addition, we show the possibility to use the electrochemical impedance technique as an alternative to those based on optical methods to detect and characterize droplets flowing in a microfluidic channel.
分离和分析单细胞在生物学和医学研究中仍然是一项具有挑战性的任务,因为在单细胞水平上的分析为获得对细胞活动的独特见解提供了巨大的潜力。这项工作的目的是开发一个芯片上的实验室设备,该设备由一个完全集成的基于液滴的微流体平台组成,致力于实时和单细胞分析,并能够执行一系列步骤,如单细胞封装,液滴表征,液滴分选,液滴捕获和分析感兴趣的液滴。本文只介绍了本课题第一部分的研究成果,其中我们提出了一种简单快速的标准微电子技术来制作微流控平台。此外,我们展示了使用电化学阻抗技术作为基于光学方法的替代方法来检测和表征微流体通道中流动的液滴的可能性。
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引用次数: 0
Utilization and Potentials of Unmanned Aerial Vehicles (UAVs) in the Field of Automated Driving: A Survey 无人驾驶飞行器(uav)在自动驾驶领域的应用与潜力综述
Pub Date : 2021-12-01 DOI: 10.1109/ICVISP54630.2021.00012
Laurent Kloeker, Tobias Moers, Lennart Vater, A. Zlocki, L. Eckstein
The number of existing UAVs in the private and commercial sector has steadily increased in recent years and is expected to experience strong growth in the future. However, so far there is little research on the use of UAVs in connection with automated driving. In this paper, we first analyze existing research and the current state of the art in the use of UAVs in the transport sector. Then we list possible potentials how UAVs can be used in the field of automated driving. We focus on the four sub-areas of the transport sector a) surveillance, b) road user detection and tracking, c) wireless communication and V2X and d) infrastructure mapping. The elaborations show that the use of UAVs in all four sub-areas can contribute significantly to enable and safeguard automated driving. In sub-area a), UAVs for example can support intelligent parking space monitoring and enable functions such as automated valet parking. In sub-area b), UAVs are particularly suitable for collecting naturalistic trajectories of road users, which are stored as datasets and serve to develop and safeguard automated driving functions. By using UAVs in sub-area c), long distances can be bridged and new, previously unattainable areas can be made accessible for communication applications. Finally, UAVs can also be used in sub-area d) to easily map new areas or to improve and continuously update existing digital HD maps. It has been further shown in literature that UAVs are partly superior to conventional vehicle environment perception methods due to their low cost factor, their ease of use and especially due to their comparatively large area of sensor coverage.
近年来,私人和商业部门现有无人机的数量稳步增加,预计未来将出现强劲增长。然而,到目前为止,关于无人机在自动驾驶中的应用的研究很少。在本文中,我们首先分析了在运输部门使用无人机的现有研究和现状。然后,我们列出了无人机在自动驾驶领域的潜在应用。我们专注于交通部门的四个子领域:a)监控,b)道路使用者检测和跟踪,c)无线通信和V2X以及d)基础设施测绘。详细说明表明,在所有四个子领域使用无人机可以为实现和保护自动驾驶做出重大贡献。在子区域a)中,以无人机为例,可以支持智能车位监控,实现自动代客泊车等功能。在子区域b)中,无人机特别适合收集道路使用者的自然轨迹,这些轨迹被存储为数据集,用于开发和维护自动驾驶功能。通过在子区域c)中使用无人机,可以跨越长距离,并且可以为通信应用提供以前无法到达的新区域。最后,无人机也可用于子区域d),方便地绘制新区域或改进和不断更新现有的数字高清地图。文献进一步表明,无人机的成本低,使用方便,特别是传感器覆盖面积较大,在一定程度上优于传统的车辆环境感知方法。
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引用次数: 2
Multi-scale spatial-temporal transformer for 3D human pose estimation 三维人体姿态估计的多尺度时空变换
Pub Date : 2021-12-01 DOI: 10.1109/ICVISP54630.2021.00051
Yongpeng Wu, Junna Gao
Most existing video-based 3D human pose estimation methods focus on single-scale spatial and temporal feature extraction. However, many human motions are only related to local joints, which suggests that we need to pay attention to the local pose of the human body for 3D pose estimation. In this paper, we propose a novel multi-scale spatial-temporal transformer framework to tackle the problem of 3D human pose estimation. Our framework mainly consists of two separate modules: a multi-scale spatial transformer module and a multiscale temporal transformer module. The first module is designed to enhance the spatial dependencies by the joint-level and part-level spatial transformers. The goal for the second module is to capture the temporal correlation of human pose by the local part-level and global whole-level temporal transformer. Then we apply a weight fusion module to predict accurate 3D human pose of the center frame. Experimental results show that our method achieves excellent performance.
现有的基于视频的三维人体姿态估计方法大多集中在单尺度时空特征提取上。然而,许多人体运动只与局部关节有关,这表明我们在进行三维姿态估计时需要注意人体的局部姿态。在本文中,我们提出了一种新的多尺度时空变换框架来解决三维人体姿态估计问题。我们的框架主要由两个独立的模块组成:一个多尺度空间变压器模块和一个多尺度时间变压器模块。第一个模块通过关节级和部件级空间变压器增强空间依赖性。第二个模块的目标是通过局部局部级和全局全局级时间转换器捕获人体姿态的时间相关性。然后应用权重融合模块准确预测中心框架的三维人体姿态。实验结果表明,该方法具有良好的性能。
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引用次数: 1
Numerical Simulation of Winter Microclimate and Thermal Comfort of an Asymmetric Canyon in the Urban Square Area 城市广场区域非对称峡谷冬季小气候与热舒适数值模拟
Pub Date : 2021-12-01 DOI: 10.1109/ICVISP54630.2021.00044
Jing Xiao, T. Yuizono, H. Gokon
Variable canyon building morphology and neighborhood configurations affect pedestrian habits and comfort, and cold weather limits pedestrian mobility in the city. The orientation and aspect ratio of a canyon significantly affect the thermal comfort and microclimatic conditions of outdoor pedestrians. This study evaluated thermal comfort and microclimate conditions in an asymmetric canyon (aspect ratio $lt 0.5)$ within the East Square of Komatsu Station, Japan. The method combines ENVI-met numerical simulations and site measurements to derive thermal comfort ranges at the highest and lowest winter temperatures through the physiologically equivalent temperature (PET) thermal index. The results showed that the optimal comfort zone was on the south side of the E-W canyon, with a higher distribution of thermal comfort levels in the S-N orientation. The mean PET index was $17^{circ}mathrm{C}$ at the highest temperature, and it was $4.48^{circ}mathrm{C}$ at the lowest temperature. Meanwhile, there is a significant difference between the thermal comfort and mean radiation temperature (Tmrt) between day and night. Interestingly, the thermal comfort index PET distribution showed that the southern side of the seating area was consistent with the winter's optimal horizontal thermal comfort zone. The mean PET index was kept between $9.69^{circ}mathrm{C}$ and $11.77^{circ}mathrm{C}$, indicating that physiological stress at the moderate cold level in the asymmetric canyon (E-W direction) is challenging to maintain pedestrians' thermal balance and comfort in windy winter weather. As one of the typical urban canyon morphologies, the evaluation results of winter thermal comfort and microclimate in the asymmetric canyon will provide an important reference for the climate-sensitive design and planning of the local urban environment.
不同的峡谷建筑形态和社区配置影响行人的习惯和舒适度,寒冷的天气限制了城市中行人的流动性。峡谷的朝向和纵横比显著影响着室外行人的热舒适和小气候条件。本研究评估了日本小松站东广场内一个不对称峡谷(宽高比为0.5)的热舒适和小气候条件。该方法结合envi数值模拟和现场测量,通过生理等效温度(PET)热指数得出冬季最高和最低温度下的热舒适范围。结果表明:东西向峡谷南侧为最佳热舒适区,南北向热舒适区分布较高;PET指数在最高温度下为$17^{circ}mathrm{C}$,在最低温度下为$4.48^{circ}mathrm{C}$。同时,白天和夜间的热舒适和平均辐射温度(Tmrt)存在显著差异。有趣的是,热舒适指数PET分布显示,座位区南侧与冬季最优水平热舒适区一致。平均PET指数保持在$9.69^{circ}mathrm{C}$和$11.77^{circ}mathrm{C}$之间,表明非对称峡谷(东西向)中冷水平下的生理应激对冬季多风天气下行人的热平衡和舒适性具有挑战性。作为典型的城市峡谷形态之一,非对称峡谷冬季热舒适与小气候评价结果将为当地城市环境的气候敏感型设计与规划提供重要参考。
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引用次数: 0
Γ-induced-paired Dominating Graphs of Paths Γ-induced-paired支配路径图
Pub Date : 2021-12-01 DOI: 10.1109/ICVISP54630.2021.00048
Saharath Sanguanpong, Nantapath Trakultraipruk
Let D be a set of vertices of a graph G. Then D is called an induced-paired dominating set if every vertex in G is adjacent to some vertex in D and the subgraph induced by D contains only nonadjacent edges. The upper induced-paired domination number of G, denoted by $Gamma_{ip}(G)$, is the maximum cardinality of a minimal induced-paired dominating set of G. An induced-paired dominating set of cardinality $Gamma_{ip}(G)$ is called an $Gamma_{ip}(G)$-set. We introduce the $Gamma$-induced-paired dominating graph of G, denoted by $IPD_{Gamma}$, to be the graph whose vertex set is the set of all $Gamma_{ip}(G)$-sets, and two $Gamma_{ip}(G)$-sets are adjacent in $IPD_{Gamma}(G)$ if one can be obtained from the other by removing one vertex and adding another vertex of G. In this paper, we present the $Gamma$-induced-paired dominating graphs of all paths.
设D是图G的一个顶点集合,如果G中的每个顶点都与D中的某个顶点相邻,并且由D诱导的子图只包含非相邻边,则D称为诱导配对支配集。G的上诱导配对支配数,用$Gamma_{ip}(G)$表示,是G的最小诱导配对支配集的最大基数。基数$Gamma_{ip}(G)$的诱导配对支配集称为$Gamma_{ip}(G)$-集。我们引入G的$Gamma$诱导配对支配图,表示为$IPD_{Gamma}$,其顶点集是所有$Gamma_{ip}(G)$-集合的集合,并且如果两个$Gamma_{ip}(G)$-集合在$IPD_{Gamma}(G)$中相邻,则其中一个可以通过G的一个顶点减去另一个顶点而得到。本文给出了所有路径的$Gamma$诱导配对支配图。
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引用次数: 0
Front-end Electronics Design for Micro-Pattern Gas Detectors Based on VA140 基于VA140的微型气体检测仪前端电子设计
Pub Date : 2021-12-01 DOI: 10.1109/ICVISP54630.2021.00038
Qibin Zheng, Dongxue Zhao, J. Deng, Xiaoli Xu, Z. Ou
This study introduces a front-end electronics design for Micro-Pattern Gas Detectors based on VA140 chip. In this system, modular structure and scalable design concept is adopted. A data acquisition cell (DAQ Cell) integrates 16 VA140 chips processing 512 detector channels and numbers of DAQ Cells can be assembled and tailored to meet the needs of different scale requirements. The system based on VA140 has been assembled and tested with the MPGD detectors. Test results indicate that the INL of the VA140 based readout system is better than 1.5%, the equivalent noise charge is about 0.75 fC and 0.15 fC, with and without connecting to the detectors. The integration test results show that the VA140 based readout system works well with the MPGD detectors. An image of a slit has been achieved with a spatial resolution of about 235um.
本文介绍了一种基于VA140芯片的微型气体检测仪的前端电子设计。本系统采用模块化结构和可扩展设计理念。一个数据采集单元(DAQ cell)集成了16个VA140芯片,处理512个检测器通道,DAQ cell的数量可以组装和定制,以满足不同规模的需求。基于VA140的系统已组装完成,并与MPGD探测器进行了测试。测试结果表明,基于VA140的读出系统的INL优于1.5%,在有无连接检测器的情况下,等效噪声电荷约为0.75 fC和0.15 fC。集成测试结果表明,基于VA140的读出系统能很好地与MPGD探测器配合使用。狭缝图像的空间分辨率约为235um。
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引用次数: 1
A Multi-factor Comprehensive Model of Human Thermal Sensation in Free-running Built Environment in Summer in Xi'an, China 西安夏季自由运行建筑环境人体热感觉多因素综合模型
Pub Date : 2021-12-01 DOI: 10.1109/ICVISP54630.2021.00036
Wuxing Zheng, T. Shao, Yingluo Wang
Clarifying the influence degree of various factors that affect human thermal sensation in free-running built environment, can provide quantitative control basis for indoor thermal environment creation and behavioral adjustment based on thermal sensation evaluation. To this end, the college student apartment buildings in Xi'an were selected as the survey location, and a thermal comfort field survey was conducted in the summer, and 1160 effective questionnaires were obtained; by analyzing the factors affecting human body heat balance, 7 parameters that affected the human thermal sensation under free-running conditions were screened out as index variables. Statistical regression method was used to establish a multi-factor comprehensive model of human thermal sensation (principal component regression model) for summer in Xi'an, and the scoring coefficient for each parameters in the model was also obtained; the predicted thermal sensation (PMTS) calculated by the comprehensive model was compared with the measured thermal sensation (MTS), and the fitting relationship of PMTS against indoor air temperature (t) was compared with that of MTS against t as well, the results show that the accuracy of the comprehensive model is fine; the influence of each factor on thermal sensation was quantified and compared, and then the priority way to improve the thermal comfort in summer in Xi'an for free-running buildings was obtained.
明确自由运行建筑环境中影响人体热感觉的各种因素的影响程度,可以为基于热感觉评价的室内热环境创设和行为调整提供定量控制依据。为此,选取西安市大学生公寓楼作为调查地点,在夏季进行热舒适现场调查,获得有效问卷1160份;通过对人体热平衡影响因素的分析,筛选出自由运行工况下影响人体热感觉的7个参数作为指标变量。采用统计回归方法建立了西安市夏季人体热感觉多因素综合模型(主成分回归模型),并得到了模型中各参数的评分系数;将综合模型计算的预测热感觉与实测热感觉进行了比较,并将PMTS与室内空气温度(t)的拟合关系与MTS与t的拟合关系进行了比较,结果表明,综合模型的精度较好;通过对各因素对热感觉的影响进行量化比较,得出了改善西安市自由运行建筑夏季热舒适的优先途径。
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引用次数: 0
Research on Optimization of Target Ship System in Ship Handling Simulator 船舶操纵模拟器中目标船系统的优化研究
Pub Date : 2021-12-01 DOI: 10.1109/ICVISP54630.2021.00030
Xiaochen Li, Helong Shen, Yong Yin
To improve the performance of the maritime simulator, reduce the cost of maintenance and upgrades, the target ship system is refactored. Based on the basic principles of systems engineering, a demand analysis is made for the system. The system is layered according to functional requirements, non-functional requirements and design constraints. The architecture is optimized by five-view method, and the whole system is reconstructed by modular development. Functional tests and fatigue tests are done on the optimized system, the results showed that the system is fully functional, easy to maintenance and upgrade. The optimized system meets the requirements of the Det Norske Veritas for maritime simulator and it’s of positive significance for improving the quality of the marine simulator.
为了提高海上模拟器的性能,降低维护和升级成本,对目标舰系统进行了重构。根据系统工程的基本原理,对系统进行了需求分析。系统按照功能需求、非功能需求和设计约束进行分层。采用五视图法对系统结构进行优化,采用模块化开发方法对整个系统进行重构。对优化后的系统进行了功能测试和疲劳测试,结果表明系统功能齐全,易于维护和升级。优化后的系统满足挪威船级社对船舶模拟器的要求,对提高船舶模拟器的质量具有积极意义。
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引用次数: 0
期刊
2021 5th International Conference on Vision, Image and Signal Processing (ICVISP)
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