检索结果-内蒙古大学图书馆

International Conference on Ubiquitous and Future Networks

作者： Yen, Hong-Hsu Shih Hsin Univ Dept Informat Management Taipei Taiwan

ISBN: (纸本)9781479989935

By equipping the Pan-Tilt-Zoom (PTZ) capable visual sensor in Wireless visual sensor Networks (WVSN), the visual sensor could move the camera to increase its coverage area. Then, fewer visual sensors will be needed on deploying the WVSN. Because of the PTZ, the Field of View (FoV) of the sensor is divided into two regions, namely Direct Coverage Region (DCR) and PTZ Coverage Region (PTZCR). The DCR is determined by the camera's depth of field and DCR span angle. The PTZCR is determined by the camera's depth of field and PTZCR span angle. We propose a mathematical model to capture the above requirements in determining the DCR and PTZCR in WVSN. Then the optimization-based heuristics that based on Lagrangean relaxation, call LGR_PTZ, is proposed to solve this problem. From the computational experiments, the LGR_PTZ outperforms the other two heuristics under all tested cases.

关键词： Pan-Tilt-Zoom visual sensor visual sensor deployment Field of View Wireless visual sensor Networks

来源：评论

学校读者我要写书评

暂无评论

Novel visual sensor deployment Algorithm in PTZ Wireless visual sensor Networks

Novel Visual Sensor Deployment Algorithm in PTZ Wireless Vis...

引用

IEEE Asia Pacific Conference on Wireless and Mobile (APWiMob)

作者： Yen, Hong-Hsu Shih Hsin Univ Dept Informat Management Taipei Taiwan

ISBN: (纸本)9781479937110

In this paper, we consider the visual sensor deployment algorithm in Pan-Tilt-Zoom (PTZ) Wireless visual sensor Networks (WVSN). With the capability of panning, tilting and zooming, the sensor visual coverage can be enlarged and fewer visual sensors are needed as compared to the traditional WVSN. We divide the Field of View (FoV) of the PTZ sensor into two regions, Direct Coverage Region (DCR) and PTZ Coverage Region (PTZCR). In the PTZCR, the visual sensor need to pan-tilt-zoom the camera angle to cover the object. Because pan-tilt-zoom is a slow mechanic operation, visual sensor might not be able to adjust the angle in time to capture the visual data. One possible way to alleviate this problem is to make sure the PTZCR are covered by M sensors. With large M, there is a high probability of adjusting the camera in time to capture the visual data at the PTZCR by at least one camera. We tackle this visual sensor deployment problem in PTZ WVSN to make sure that each area is either covered in the DCR of a single visual sensor or in the PTZCR of M sensors. Then novel heuristic, PTZA algorithm, is proposed to solve the problem. In the computational experiments, we find out that PTZ capable camera sensor could significantly reduce the number of deployed sensors especially in smaller sensing range and smaller camera span angle.

关键词： Pan-Tilt-Zoom visual sensor visual sensor Coverage visual sensor deployment Field of View Wireless visual sensor Networks

来源：评论

学校读者我要写书评

暂无评论

Novel visual sensor Coverage and deployment in Time Aware PTZ Wireless visual sensor Networks

引用

sensorS 2017年第1期17卷 64-64页

作者： Yap, Florence G. H. Yen, Hong-Hsu Chang Gung Univ Ctr Gen Educ Taoyuan 333 Taiwan Shih Hsin Univ Dept Informat Management Taipei 116 Taiwan

In this paper, we consider the visual sensor deployment algorithm in Pan-Tilt-Zoom (PTZ) Wireless visual sensor Networks (WVSNs). With PTZ capability, a sensor's visual coverage can be extended to reduce the number of visual sensors that need to be deployed. The coverage zone of a visual sensor in PTZ WVSN is composed of two regions, a Direct Coverage Region (DCR) and a PTZ Coverage Region (PTZCR). In the PTZCR, a visual sensor needs a mechanical pan-tilt-zoom operation to cover an object. This mechanical operation can take seconds, so the sensor might not be able to adjust the camera in time to capture the visual data. In this paper, for the first time, we study this PTZ time-aware PTZ WVSN deployment problem. We formulate this PTZ time-aware PTZ WVSN deployment problem as an optimization problem where the objective is to minimize the total visual sensor deployment cost so that each area is either covered in the DCR or in the PTZCR while considering the PTZ time constraint. The proposed Time Aware Coverage Zone (TACZ) model successfully captures the PTZ visual sensor coverage in terms of camera focal range, angle span zone coverage and camera PTZ time. Then a novel heuristic, called Time Aware deployment with PTZ camera (TADPTZ) algorithm, is proposed to solve the problem. From our computational experiments, we found out that TACZ model outperforms the existing M coverage model under all network scenarios. In addition, as compared to the optimal solutions, the TACZ model is scalable and adaptable to the different PTZ time requirements when deploying large PTZ WVSNs.

关键词： PTZ visual sensor PTZ time constraint visual sensor deployment wireless visual sensor networks

来源：评论

学校读者我要写书评

暂无评论

Radial Coverage Strength for Optimization of Monocular Multicamera deployment

引用

IEEE-ASME TRANSACTIONS ON MECHATRONICS 2021年第6期26卷 3221-3231页

作者： Lei, Zike Chen, Xi Chen, Xiang Chai, Li Wuhan Univ Sci & Technol Sch Informat Sci & Engn Wuhan 430081 Hubei Peoples R China Wuhan Univ Sci & Technol Engn Res Ctr Met Automat & Measurement Technol Wuhan 430081 Hubei Peoples R China Univ Windsor Dept Elect & Comp Engn Windsor ON N9B 3P4 Canada

In this article, a new concept, radial coverage strength, is first proposed to characterize the visual sensing performance when the orientation of the target pose is considered. In particular, the elevation angle of the optical pose of the visual sensor is taken to decompose the visual coverage strength into effective and ineffective components, motivated by the imaging intuition. An optimization problem is then formulated for a monocular multicamera network to maximize the coverage of the object area based on the strength information fusion along the effective coverage strength direction through the deployment of the angle between radial coverage vector of the camera optical pose. Both simulation and experiments are conducted to validate the proposed approach and comparison with existing methods is also provided.

关键词： Cameras visualization Solid modeling Task analysis Optimization Optical imaging Mechatronics Data fusion monocular multicamera network radial coverage visual sensor deployment

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：