恶劣环境下监控视频中舰船图像增强研究

受到舰船监控应用环境的影响,恶劣环境下监控视频中会因为低照度原因,出现视频图像运动影像模糊问题,严重影响视频监控应用。为此,提出恶劣环境下监控视频中舰船图像增强研究。首先对低照度舰船监控视频图像进行降噪明度提升计算,接着对视频图像运动目标轨迹进行增强计算,最后对图像全局通道进行模糊遮罩层的去雾计算,从而完成图像增强计算。为了证明提出研究方法的有效性,通过仿真对比实验对提出方法与传统方法进行测试,根据测试结果,得出有效性结论。     

基于CamShift的监控视频中运动目标跟踪算法研究

针对监控视频中运动目标的运动状态变化较快,一般算法难以实现及时跟踪的现状,论文提出了应用Cam-Shift算法对视频监控中的运动目标进行跟踪。实验结果表明,与MeanShift算法的目标跟踪结果相比,CamShift算法能够快速并高效地对视频中目标变化较快的物体进行跟踪,定位准确,算法复杂度较小,具有很好的鲁棒性。     

船舶监控数字视频分块无损压缩模型构建

视频监控系统是船舶不可或缺的组成部分,该系统在管理监控方面具有不可替代的作用,在防碰撞中的作用尤为突出。视频监控系统采集到的数字视频需要进行压缩处理,为提高压缩效果,可以对视频进行分块,然后利用无损压缩模型快速完成视频压缩。鉴于此,提出数字视频无损压缩技术,对监控视频进行分块处理,基于运动估计和图像增强构建无损压缩模型,利用该模型完成监控视频压缩。结果表明,构建的模型对数字视频具有良好的重建效果。     

海事智能视频监控系统设计与实现

设计了一个面向海事场景的网络视频监控系统,系统从网络上获取航道和港区视频序列,进行分析和处理,对用户定义的受控区域进行实时监控,当受控区域出现运动目标时进行分级告警.针对海事场景背景复杂、干扰大等困难,提出了改进的混合高斯背景模型及运动检测方法.在目标跟踪方面,为运动区域建立颜色、形状和运动的混合模型,并通过距离矩阵和匹配矩阵判定目标和轨迹间的对应关系.经测试,该设计实现的各项功能都能满足海事部门对海事场景的实时监控.     

舰船视频监控数据压缩算法的设计

数据压缩算法是舰船监控视频系统中的重要技术,直接影响舰船监控视频传输的实时性,针对当前舰船监控视频数据压缩算法存在压缩比小、信息丢失严重等不足,设计了基于剪切波变换和压缩感知算法的舰船监控视频数据压缩算法。首先对当前舰船监控视频数据压缩算法进行研究,找到各种算法存在的局限性,然后对舰船监控视频原始数据进行去噪处理,减少噪声传输所占的通信资源,并采用剪切波变换对舰船监控视频数据进行分解,最后采用压缩感知算法对剪切波变换系数进行压缩处理,减少舰船监控视频数据规模,并通过剪切波反变换对舰船监控视频数据进行重构。与对比舰船监控视频数据压缩算法的仿真对比测试结果表明,本文算法能够在保持舰船监控视频数据原始信息的基础上,对舰船监控视频数据进行了最大限度的压缩,而且舰船监控视频数据压缩速度快,获得了对比算法更加理想的舰船监控视频数据压缩结果。     

基于深度学习的监控视频中船舶识别方法

针对当前监控视频中船舶识别成功率低、无法进行在线识别的难题,为了对监控视频中船舶进行准确识别,提出基于深度学习的监控视频中船舶识别方法。首先对监控视频中船舶识别原理进行分析,采集船舶识别的监控视频,将船舶识别从背景中分割,然后提取船舶识别的不变矩特征,将不变矩特征输入深度学习算法中进行训练,建立监控视频中船舶识别模型,最后进行了多个监控视频中船舶识别验证性实验。实验结果表明深度学习算法可以准确对监控视频中的船舶进行识别,提高了监控视频中船舶识别成功率,误识率急剧下降,远低于当前其它监控视频中船舶识别方法,实时性要也要高于其它识别方法,是一种速度快、结果可信的监控视频中船舶识别方法。     

港区视频监控系统维护管理综述

视频监控技术已经在港区安全监管中得到广泛应用,而良好的维护管理工作是保证视频监控系统稳定可靠运行的重要手段。文中首先介绍了视频监控系统的组成结构,然后阐述了港区视频监控的特点,并对维护管理工作存在的问题进行详细分析,最后提出了加强视频监控系统维护管理的几项措施。     

SIP在视频监控系统互联互通中的应用研究

分析了传统视频监控系统在互联互通性上存在的问题,设计了一个基于SIP的网络视频监控系统,并进一步研究了SIP在该视频监控系统之内和视频监控系统之间的应用。     

主动轮廓模型在运动舰船目标跟踪中的应用

应用数字图像处理技术对视频监控系统中的舰船目标进行运动检测与跟踪。针对水面环境存在的复杂变化,选用混合高斯背景模型的方法构建实时背景模型,应用背景差分法检测出监控画面中的运动舰船区域,并得到舰船目标的初始轮廓,再利用主动轮廓模型方法,提取运动舰船目标轮廓,并利用舰船轮廓实现目标跟踪。实验表明,算法可对目标轮廓进行较好地跟踪,并且复杂度较低。     

改进ViBe算法及其在运动船舶目标检测中的应用

为了抑制ViBe算法在海面动态背景视频下“鬼影”区域对船舶运动目标检测的影响,提高监控视频中船舶运动目标识别的准确率,提出一种改进的ViBe算法。首先,背景模型用连续帧初始化,以减少“鬼影”的影响;然后,使用自适应阈值和闪烁级别来减少海面杂波,同时采用像素点对比消除“鬼影”,提取运动目标前景,获取完整的运动目标区域。最后,对输入视频进行高斯金字塔多尺度分解,并采用改进的ViBe算法检测低分辨率视频中的移动船舶,完整提取了海上移动船舶。实验结果表明,所改进的算法消除了“鬼影”区域,减少了海面杂波的干扰,检测率为92.5%,单帧视频图像检测时间控制在97 ms以内,可准确、快速地检测和提取海面船舶运动目标。     

Errata

正In the paper"Influence of Fouling Assemblage on the Corrosion Behaviour of Mild Steel in the Coastal Waters of The Gulf of Mannar,India"in Vol.12,No.4,Page:509,References were lost,and the two authors’biographies were identical.The correct text is shown below.We apologize to the authors and our readers for any inconvenience caused by the errors.     

Journal of Marine Science and Application 2014 Sum. Contents

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33rd International Conference on Ocean,Offshore and Arctic Engineering （OMAE2014）

正San Francisco,California,June 8-13,2014.OMAE 2014 is the ideal forum for researchers,engineers,managers,technicians and students from the scientific and industrial communities from around the world to:·meet and present advances in technology and its scientific support;·to exchange ideas and experiences whilst promoting technological progress and its application in industry·to promote international cooperation in ocean,offshore and arctic engineering.In line with the tradition of excellence of previous OMAE conferences,more than 900 technical papers are planned for presentation.Outreach for Engineers Specialty Forum This Specialty Forum is designed for students and professionals who may not be familiar with the Ocean and Offshore industry,as well as those who have just recently specialized in this field.     

联合作战计划和执行系统

全球指挥控制系统(GCCS)实施当前美国海军网络中心战信息基础设施的联合计划网络。联合作战计划和执行系统(JOPES)支持GCCS实现联合计划。JOPES有两类计划：时间不限的精密预案计划生成作战计划、方案计划或职能计划；时间敏感的危机行动计划生成作战命令或战役方案。前者在和平时期创建的作战计划是后者的计划基础，加速应付危机的能力。     

Recent progress on wave induced loading measurements in warships

Recent measurements of wave induced hull strain and flexure in RN warships are presented together with the derivation of the current design criteria for extreme hull girder bending loads. The history of the development of the shipboard instrumentation used is given and recent developments to improve the quality and ease of analysis of the data are described. An unexpectedly high transverse asymmetry in the longitudinal strains measured in destroyers is shown to be the result of a combination of vertical and lateral bending in oblique seas. Finally recent theoretical comparisons between the loading of Deep-Vee hulls and conventional UK rounded bilge hulls are presented which demonstrate the higher loading experienced by this type of hull form.     

The 11th International Conference on Hydrodynamics (ICHD 2014)

正19–24 October 2014 SingaporeCONFERENCE THEMES The overall aim of the ICHD Conference is to provide a forum for participants from around the world to review,discuss and present the latest developments in the broad discipline of hydrodynamics and fluid mechanics.The first International Conference on Hydrodynamics(ICHD)was initiated in 1994 in Wuxi,China.Since then,9 more ICHD conferences were held subsequently in Hong Kong,Seoul,Yokohama,Tainan,Perth,Ischia,Nantes,Shanghai and St Petersburg.Evidently the ICHD conference has become an important event among academics,researchers,engineers and operators,working in the fields closely related to the science and technology of hydrodynamics.The 11th ICHD will be held in Singapore in 2014.     

第十二届深水操作会议和展览会(英文)

正November 4-6,2014Moody Gardens HotelConvention Center/Galveston,TX The Deepwater Operations Conference and Exhibition is celebrating its 12th anniversary this year.This growing event will continue the tradition of excellence in addressing operational challenges involved in developing deepwater resources.We will return to the Moody Gardens Hotel and Convention Center on November 5-7,2014 in Galveston,Texas.     

Eastbound or westbound ?

In terms of equal sailing distances, where is the inflexion when ships depart from ports in the Asian Continent to New York via Suez and/or Panama？
The answer is China South Port Group （Hong Kong, Shenzhen and Guangzhou）.     

Impact of regulation on the performances of long-distance transport services: A comparison of the different approaches in Sweden and Norway

Despite the many socio-economic similarities between Sweden and Norway, differences in jurisdiction, organisation, cooperation, and financing of long-distance passenger train and coach services have led to the development of four distinctively different ways of serving the markets. This paper describes how the train and coach markets have developed in the two countries, with emphasis on regulatory and industrial structure and a couple of performance variables.Looking at passenger rail, both countries separated infrastructure from operation over a decade ago. However, while Norwegian rail is characterised by an almost monopoly supplier, rail services in Sweden are partly decentralised to the responsibility of county authorities and are widely subjected to competitive tendering. The rest of the network is about to be opened up for on-the-track competition. Swedish Rail (SJ) has spent the last decades consolidating its core business (passenger rail) and sold out its other businesses. In contrast, the Norwegian state rail (NSB) has expanded its business to become a major bus operator and property owner, with extensions also into the Swedish market.The coach industry was more recently deregulated in both countries. The Swedish coach market is dominated by privately owned companies operating services to and from Stockholm. In Norway, state-owned NSB is a major coach operator on medium distance routes, and is also the largest partner of Nor-Way Bussekspress which totally dominates long-distance coach services. Further, the Norwegian coach market is characterised by cross-ownership and cooperation which has enabled an extensive route network which covers most of Norway.We find distinct differences in achievements in the two modes and in the two countries. Swedish rail services have succeeded in winning market shares and in renewing and developing both infrastructure and service levels to a greater extent than the Norwegian model. On the other hand, the Norwegian coach market seems to be more developed and efficient compared to its Swedish counterpart.The paper concludes with a discussion on the possible links between the different approaches and the performance observed, with the aim to stimulate further and more detailed research on some important issues.     

某海港码头的撞损修复

依据码头撞击受损区域调查检测结果,对受损构件提出合理的修复方案,为码头的安全运行提供保障。