Analyses of Trawling Track and Fishing Activity Based on the Data of Vessel Monitoring System(VMS): A Case Study of the Single Otter Trawl Vessels in the Zhoushan Fishing Ground

The original purpose of Vessel Monitoring System(VMS) is for enforcement and control of vessel sailing. With the application of VMS in fishing vessels, more and more population dynamic studies have used VMS data to improve the accuracy of fisheries stock assessment. In this paper, we simulated the trawl trajectory under different time intervals using the cubic Hermite spline(c Hs) interpolation method based on the VMS data of 8 single otter trawl vessels(totally 36000 data items) fishing in Zhoushan fishing ground from September 2012 to December 2012, and selected the appropriate time interval. We then determined vessels' activities(fishing or non-fishing) by comparing VMS speed data with the corresponding speeds from logbooks. The results showed that the error of simulated trajectory greatly increased with the increase of time intervals of VMS data when they were longer than 30 minutes. Comparing the speeds from VMS with those from the corresponding logbooks, we found that the vessels' speeds were between 2.5 kn and 5.0 kn in fishing. The c Hs interpolation method is a new choice for improving the accuracy of estimation of sailing trajectory, and the VMS can be used to determine the vessels' activities with the analysis of their trajectories and speeds. Therefore, when the fishery information is limited, VMS can be one of the important data sources for fisheries stock assessment, and more attention should be paid to its construction and application to fisheries stock assessment and management.

Real-time moving object detection for video monitoring systems

Moving object detection is one of the challenging problems in video monitoring systems, especially when the illumination changes and shadow exists. Amethod for real-time moving object detection is described. Anew background model is proposed to handle the illumination varition problem. With optical flow technology and background subtraction, a moving object is extracted quickly and accurately. An effective shadow elimination algorithm based on color features is used to refine the moving obj ects. Experimental results demonstrate that the proposed method can update the background exactly and quickly along with the varition of illumination, and the shadow can be eliminated effectively. The proposed algorithm is a real-time one which the foundation for further object recognition and understanding of video mum＇toting systems.

Research on Remote Video Monitoring System Used for Numerical Control Machine Tools Based on Embedded Technology

This paper designed an embedded video monitoring system using DSP (Digital Signal Processing ) and ARM (Ad- vanced RISC Machine).This system is an important part of self-service operation of numerical control machine tools,At first the analog input signals from the CCD(Charge Coupled Device) camera are transformed into digital signals,and then output to the DSP system,where the video sequence is encoded according to the new generation image compressing standard called H.264.The code will be transmitted to the ARM system through xBus,and then be packed in the ARM system and transmitted to the client port through the gateway.Web technology,embedded technology and image compressing as well as coding technology are integrated in the system,which can be widely used in self-service operation of numerical control machine tools and intelligent robot control areas.

Intensity Retrieved from Public Monitoring Video——Cases from the May 12,2008,Wenchuan Earthquake

Macroseismic investigation is presented with a new potential means of investigation in the "digital age". In this paper we studied several cases in the May 12, 2008, Wenchuan M_S8.0 earthquake with a view to exploring the feasibility of retrieving intensity, or even strong ground motion parameters, from public monitoring video which was originally deployed for security purposes. We used public monitoring video records from 44 sites across the meizoseismal region and its surroundings to estimate the intensity. By using the video from a bank in Dujiangyan, Sichuan Province and making the simple assumption that ground vibration is in the form of a propagating harmonic wave, we estimated that the local ground motion acceleration was 0.14g.

Scalable Compression Algorithm for Video Monitoring System

A layered compression algorithm is presented which delivers spatial scalable encoded bit streams for remote video monitoring system. The complexity of the algorithm is modest and is well suited to real time implementation. Based on the layered compression algorithm, a codec system model is established. High-speed video compression can be realized with parallel data compression in this codec system. For image reconstruction, a prediction method using two nearest pix points is presented.

Study on an Audio and Video Network Monitoring System for Weather Modification Operation

An audio and video network monitoring system for weather modification operation transmitting information by 3G, ADSL and Internet has been developed and applied in weather modification operation of Tai＇an City. The all-in-one machine of 3G audio and video network highly integrates all front-end devices used for audio and video collection, communication, power supply and information storage, and has advantages of wireless video transmission, clear two-way voice intercom with the command center, waterproof and dustproof function, simple operation, good portability, and long working hours. Compression code of the system is transmitted by dynamic bandwidth, and compression rate varies from 32 kbps to 4 Mbps under different network conditions. This system has forwarding mode, that is, monitoring information from each front-end monitoring point is trans- mitted to the server of the command center by 3G/ADSL, and the server codes＇and decodes again, then beck-end users call images from the serv- er, which can address 3G network stoppage caused by many users calling front-end video at the same time. In addition, the system has been ap- plied in surface weather modification operation of Tai＇an City, and has made a great contribution to transmitting operation orders in real time, monitoring, standardizing and recording operating process, and improving operating safety.

Design of DSP-based Embedded Video Remote Monitoring System

Presented is a scheme of an embedded video remote monitoring system based on TMS320DM642. Using DM642 as the data processing core, the remote monitoring system is composed of video acquisition module, video processing module and communication module, which gives an implementation of class/mini driver module in DSP/BIOS integrated developing environment and also a common task module in application layer is achieved. The system realizes the entire functions of the analog video signal acquisition, H.264 video coding and Internet transmission. It provides the general connection for the future development and has good flexibility and extendibility. The system uses a modular design and overall development of programming methods to improve the efficiency of system development.

The Monitoring with Video and Alarm System Based on Linux Router

As one of important safeguarded measures in security field, the video monitoring system have been applied in extensive ways such as building’s security,information’s acquisition and medical treatment. In current time, the intelligent home systems as well as the Internet of Things are forming a more and more mature industrial chain. With abundant of new technology applications, this industrial chain is developing towards to a more intelligent way. One of the most important applications is the video monitoring system developed by new technology. Deploy an appropriate design of video monitoring system in the several fields such as public security, traffic schedule, systems control and so on, is a major technological medium which can guarantee not wasting an amount of manpower resource as well as keeping the system in a good running status. This article based on the preponderance of the Linux system, especially the character of open source of it. Combine the Linux system and some particular routers;designing a real-time and efficient video monitoring system. It’s functional and in the meantime it can discriminate abnormal information or the situation automatically and then raise the alarm. This system use matured B/S mode in software’s framework, which is also lightweight class. In addition, this system manages the expenses in hardware cost more commendably.

Embedded Remote Monitoring System of Agricultural Environment Based on DSP

Agricultural environmental remote monitoring,data collection and network transmission are the development directions of modern agriculture.The embedded video remote monitoring system is designed with DSP processor DM642,which can collect the video signal of agricultural environment and biological information,as well as complete the extraction of video signal and network transmission.This system can be applied to the agro-ecological and environmental resources monitoring,agricultural disaster monitoring and warning and other digital agricultures.

基于MAX7474的SVMS视频信号补偿方案

针对安全视频监控系统(Security Video monitor System,简称SVMS)中非屏蔽双绞线(UTP)电缆远距离传输的视频信号损耗补偿需求,提出了利用自适应均衡器MAX7474来补偿UTP中衰减复合视频信号的应用方案。简要介绍了MAX7474器件的功能及其内部结构;给出了在MAX7474的基础上构建UTP视频信号补偿电路的一个应用实例。经实验证明,该方案中的电路工作稳定,对衰减后的视频信号具有良好的补偿性能。

数字视频监控系统(DVMS)中的重要视频段的剪辑与管理

现有的数字视频监控系统对存储的视频文件管理、利用,操作不够方便,效率不高。对故障排除或其他重要视频文件的处理,只能通过手工操作,利用现有的多媒体软件来进行。通过利用VC++6.0、ADO、SQLServer2000等技术,对视频文件格式为MPEG 1的大量视频文件分析,找到有效方法,提高视频信息管理、利用水平,开发新的数字视频监控管理系统。实验证实,该系统具有使用灵活、适用面广、实用性强、可靠性高等优点。

FH0201-VMS多级远程视频监控系统

详细介绍了北京佳讯飞鸿电气有限责任公司针对铁路系统现状而开发、生产的FH0201VMS视频监控系统,包括组网方案、主要功能、技术特色和实际应用等。

安讯士发布新视频存储系统——AXIS VMS N16-Z

安讯士网络通讯继发布Axis Camera Companion和AXIS Video Management Software两款视频管理软件之后,又新发布一款特别针对中国市场推出的视频存储系统——AXIS VMS N16-Z。这款产品是一款将视频查看、录像、回放和事件管理等功能融于一体,为用户提供全方位的视频监控解决方案。

基于iVMS-8700综合安防管理平台的视频监控系统

结合某园区项目,详细分析了基于综合安防管理平台iVMS-8700的视频监控系统的技术方案选择及构架,阐述了网络硬盘录像机在园区业务应用中的特点。提出基于综合安防管理平台iVMS-8700的视频监控系统运行稳定、可靠,报警联动及时、高效,保障各部门车间人员的行为安全,提高车间流水工作的日常监管效率。

关于NI VMS视频测量软件对电视视频信号发生器进行校准的研究

该文以美国国家仪器(NI)生产的NI PXI-5122数据采集卡结合NI VMS视频测量软件来代替VM700系列视频分析仪对电视视频信号发生器进行校准,简述校准步骤,并对相关不确定度进行评定。

VMS和ESD系统在自升式钻井平台上的设计和应用

船舶监控系统(VMS)和应急切断(ESD)是海上作业平台的神经中枢系统,用于监控全船设备的运行情况。一方面连续监测全船设备正常运行情况,另一方面监测到任何设备发生故障,及时进行全船报警,通过对故障点运算结果做出相应的切断处理,确保把故障范围降到最小,因而确保生产、人员和设施的安全。只有VMS和ESD正常工作才能为海上作业顺利完成保驾护航。

基于HOG+SVM的智能家居入侵检测系统设计

当前,大多数的智能家居视频监控系统仅仅完成简单的视频图像传输功能,不太智能;或是保持PC常开,将视频图像数据传输到PC端进行相应的检测和识别,增加消耗。为解决该问题,系统以嵌入式技术为载体,利用Cortex-A9处理器芯片搭载Linux操作系统,结合机器视觉图像处理技术,融入HOG+SVM机器学习方法来对视频中是否有外人入侵进行检测,并可通过GPRS模块进行短信报警通知。同时可通过智能终端,登录指定网页或者相应的客户端进行实时查看和取证。实验结果表明,该系统数据传输稳定、算法准确度较高,可替代传统的智能家居视频监控系统。

基于PSO-SVM的变电站视频监控火灾识别算法

为最大限度的降低由于火灾造成的生命财产损失,提出基于PSO-SVM的变电站视频监控火灾识别算法,提高火灾识别的精准度与环境适应性。依据火焰亮度与颜色特征在YCrCb颜色空间内,检测出变电站视频监控火灾图像中的火焰可疑区域,提取出火焰可疑区域的火焰面积变化率、火焰形状相似度、绿红分量面积比、高低频能量比4个特征,作为SVM的输入样本,构建SVM分类模型,将采用PSO算法快速精准地搜寻出SVM的最优参数,用于SVM模型训练与分类预测,最终实现对变电站视频监控火灾的识别。实验表明,该算法可精准检测出火焰可疑区域;有效排除干扰物,精准识别变电站视频监控火灾,识别火焰的精准度较高;即使在光线较暗时,也可快速识别火灾,火灾识别的环境适应性强。

A DUAL-CAMERA VIDEO-TRACKING SYSTEM USING PROJECTION ALGORITHM

This paper presents a video-tracking system composed of two cameras. One camera acts for producing an in-focus image of the object and the other one ensures an extended vision field under monitoring. Such a system scheme can achieve an excellent tracking performance,especially under various unfavorable conditions. A projection algorithm is used for the calculation of the displacement of the moving object. As a result, the computational cost is reduced greatly.In order that the tracking action of the system persists even if the object is sheltered or ns acceleration is larger than a specified threshold, a dedicated tracking algorithm on the basis of the α-β filtering is designed. Experiments show that the algorithm is efficient and the system works very well.

Using video imagery to reconstruct the 3D intertidal terrain along a beach with multiple cusps

A high-frequency,high-resolution shore-based video monitoring system(VMS)was installed on a macrotidal(tidal amplitude>4 m)beach with multiple cusps along the Quanzhou coast,China.Herein,we propose a video imagery-based method that is coupled with waterline and water level observations to reconstruct the terrain of the intertidal zone over one tidal cycle.Furthermore,the beach cusp system(BCS)was precisely processed and embedded into the digital elevation model(DEM)to more effectively express the microrelief and detailed characteristics of the intertidal zone.During a field experiment conducted in January 2022,the reconstructed DEM was deemed satisfactory.The DEM was verified by RTK-GPS and had an average vertical root mean square error along corresponding RTK-GPS-derived intertidal profiles and corresponding BCS points of 0.134 m and 0.065 m,respectively.The results suggest that VMSs are an effective tool for investigating coastal geomorphic processes.