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Removing Smoothing Effects for Color Image Segmentation

Removing Smoothing Effects for Color Image Segmentation

引用

IEEE International Conference on Systems, Man and Cybernetics

作者： Wen-Chang Cheng Hua-Hung Tseng Dep. of Computer Science and Information Engineering Chaoyang University of Technology Taiwan R.O.C.

ISBN: (纸本)9781479986989

In this study, we described the effects of image smoothing on image segmentation, introduced a method proposed by Yang et al. For removing smoothing effects (hereafter referred as Yang's method), and modified this method to solve image segmentation problems. The results showed that Yang's smoothing method still required further improvements, therefore, two solutions to solving problems related to this method were proposed. In Yang's method, the researchers only considered removing the effects of central pixels in a mask on mask calculation, neglecting the effects of edge pixels in a region of a mask on mask calculation. Therefore, we incorporated an edge mask calculation into Yang's method. Moreover, in Yang's method, distinct color masks are contained in the color components of a single pixel, which cause these components to yield differing adjustment results. Thus, the solution to this problem is to adopt a single-colored mask for color adjustments. The experimental results verified that the method proposed in this study effectively improved Yang's method and removed the effects of smoothing on image segmentation.

关键词： Image color analysis Image segmentation Image edge detection Smoothing methods Color Gray-scale Noise reduction

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Using Combined Cellular Ad Hoc Communications for Smart Environments

Using Combined Cellular Ad Hoc Communications for Smart Envi...

引用

International Conference on Advanced information Networking and Applications Workshops (AINAW)

作者： Mimoza Durresi Arjan Durresi Leonard Barolli Kazunori Uchida Dep. of IT Mathematics and Statistics European University of Tirane Tirana Albania Dep. of Computer Science IUPUI Indianapolis USA Dep. of Information and Communication Engineering Fukuoka Institute of Technology Fukuoka Japan

ISBN: (纸本)9781479917761

We propose a Heterogeneous Multi Domain (HMD) architecture and protocols that uses ad hoc and cellular communications for enabling the exchange of information among users and smart environments. In particular, we focuss on the data communication and information diffusion related to tourism industry. Sensor's technology enables today the collection of various data related to the environment, such as temperature, location, and so on. This information can be delivered timely to users interacting with the environment. For example, a user might get direction in a building or in a park. Our architecture uses a network of gateways as an hierarchical virtual infrastructure to interconnect various network domains. Gateways are responsible for translation among different communication protocols, including routing, signalling, and security. HMD architecture is scalable, flexible and adaptive to QoS needs for interdomain communications. The protocol goal is to optimize such communications in terms of performance.

关键词： Logic gates Protocols Ad hoc networks Routing Smart phones Delays Wireless sensor networks

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Using Cellular Sensor Networks for Environment Protection

Using Cellular Sensor Networks for Environment Protection

引用

International Conference on Advanced information Networking and Applications Workshops (AINAW)

ISBN: (纸本)9781479917761

Protecting the environment from many threats has become a priority worldwide. The existing sensor technology enables the continuous monitoring of various parameters related to environment status, such as air quality and many others. In this paper we propose a secure architecture based on cellular networks to collect such sensors' information in real time. The cell phones can interact with the cellular network and the sensor networks at the same time. This unique ability can be leveraged to provide better authentication and security. We propose an architecture for these networks along with protocols that can be used to establish security. In our architecture, we use gateways, as intermediate nodes that are able to interact with both the cell phones and the sensor nodes.

关键词： Cellular phones Logic gates Cryptography Authentication computer architecture Servers

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Energy Models for Communication of Future Computing Platforms

Energy Models for Communication of Future Computing Platform...

引用

IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

作者： Elke Franz Stefan Pfennig Bho Matthiesen Christian Scheunert Eduard A. Jorswieck Dep. of Computer Science/Privacy and Data Security Dep. of Electrical Engineering and Information Technology/Communications Laboratory Technische Universität Dresden Dresden Germany

ISBN: (纸本)9781467365567

Energy efficiency is an essential requirement on future computer architectures. Thereby, the efficiency of the communication will play an important role. Within this paper, we present an energy model for a unicast multi-hop communication. The model allows to derive predictions about the energy of a future computing platform. Further, it can be used to identify which components of the system or tasks related to communication have a significant influence on the overall energy and, hence, require special attention in the design phase. We discuss how values for processing delays and power consumption can be determined for a future computing platform and present values for a target platform. The energy model is applied to derive energy predictions for this platform.

关键词： Delays Computational modeling Power demand Network coding Open systems Hardware Receivers

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City users' classification with mobile phone data

City users' classification with mobile phone data

引用

IEEE International Conference on Big Data

作者： Lorenzo Gabrielli Barbara Furletti Roberto Trasarti Fosca Giannotti Dino Pedreschi Dep. of Information Engineering University of Pisa Italy ISTI - CNR Pisa Italy Dep. of Computer Science University of Pisa Italy

Nowadays mobile phone data are an actual proxy for studying the users' social life and urban dynamics. In this paper we present the Sociometer, and analytical framework aimed at classifying mobile phone users into behavioral categories by means of their call habits. The analytical process starts from spatio-temporal profiles, learns the different behaviors, and returns annotated profiles. After the description of the methodology and its evaluation, we present an application of the Sociometer for studying city users of one small and one big city, evaluating the impact of big events in these cities.

关键词： mobile phone data individual profiles classification semi-automatic methods

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Confidential Network Coding: Physical Layer vs. Network Layer

Confidential Network Coding: Physical Layer vs. Network Laye...

引用

IEEE International Conference on Ubiquitous Wireless Broadband (ICUWB)

作者： Stefan Pfennig Elke Franz Johannes Richter Christian Scheunert Eduard A. Jorswieck Dep. of Computer Science/Privacy and Data Security Technische Universitat Dresden Dresden Germany Dep. of Electrical Engineering and Information Technology Technische Universitat Dresden Dresden Germany

ISBN: (纸本)9781467365567

In all kind of information exchange, security is essential. One protection goal that has to be enforced is confidentiality. In state-of-the-art protocols, messages are encrypted before they are transmitted to ensure their confidentiality. However, incorporating novel technologies like network coding allows for more efficient solutions. Within this article, we compare different solutions for confidential communication by means of network coding at physical layer and at network layer. We discuss security, efficiency, and computational complexity of these approaches. The results allow to draw conclusions about the choice of a suited communication scheme dep.nding on the system model and the relevant parameters.

关键词： Network coding Relays Physical layer Lattices Computational modeling Cryptography

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Conducted EMI reduction of a soft-single-switched boost converter using heat-sink capacitance cancellation

Conducted EMI reduction of a soft-single-switched boost conv...

引用

Power Electronic and Drive Systems and Technologies Conference (PEDSTC)

作者： Mohammad Rouhollah Yazdani Maryam Alirezaei Hosein Farzanehfard Dep. of Electrical Engineering Islamic Azad University Isfahan Iran Dep. of Electrical and Computer Engineering Isfahan University of Technology Isfahan Iran

ISBN: (纸本)9781479976546

Conventional power supplies are considered as sources of electromagnetic interference. Increasing use of power converters leads to the need of electromagnetic emissions. Although soft switching methods are addressed to reduce electromagnetic emissions, the amount of EMI reduction may not be enough which leads to employ another EMI reduction methods. In this paper, a pulse width modulation soft-single-switched boost converter is modeled from conducted EMI viewpoint and its conducted EMI is predicted. To reduce EMI, a EMI reduction technique based on cancellation of the switch parasitic capacitor is investigated. This technique is applied to the converter and conducted EMI is simulated. The comparison between simulation results shows a considerable reduction in conducted EMI levels after applying this technique.

关键词： Switches Electromagnetic interference Electromagnetic compatibility Logic gates Pulse width modulation

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Derivation of AC small signal model and analysis of trans Z-source inverter

Derivation of AC small signal model and analysis of trans Z-...

引用

Iranian Conference on Electrical engineering (ICEE)

作者： Mehran Moslehi Bajestan Mohammad Ali Shamsinejad Davood Arab Khaburi Dep. of Electrical and Computer Engineering University of Birjand Birjand Iran Dep. of Electrical Engineering Iran University of Science and Technology Tehran Iran

This paper presents the ac small signal modeling and analysis of trans Z-Source inverter (trans ZSI). Trans ZSI has been derived from quasi Z-source converter recently. While maintaining all prominent features of pervious Z-source inverters, trans ZSI has several unique advantages such as increased voltage gain, reduced voltage stress and reduced components of impedance network. In the process of designing control schemes for the trans ZSI, knowledge of the transfer function representing its unique dc impedance network is essential. In particular, the state space averaging method is employed to deduce the transfer functions. These transfer functions reveal the presence of right half plane (RHP) zero, which imposes some limitations on controller design. The RHP zero trajectories with variations in network parameters can be studied using classical root-locus analyses. Considering system dynamic characteristics, the trans ZSI design guidelines for passive component sizing is investigated by parameter sweeping of the small signal model based transfer functions. Simulation results are presented to verify the dynamic modeling identified in this paper.

关键词： Inverters Electrical engineering Poles and zeros Capacitors Damping Analytical models

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Understanding thermal fluxes in and around pune city using remotely sensed data 36

Understanding thermal fluxes in and around pune city using r...

引用

36th Asian Conference on Remote Sensing: Fostering Resilient Growth in Asia, ACRS 2015

作者： More, Ravina Kale, Neha Kataria, Garima Yadav, Piyush Deshpande, Shailesh Dep. Computer Engineering Maharashtra Institute of Technology Savitribai Phule Pune University India TATA Research Development and Design Centre 54-B Hadapsar Industrial Estate Pune411013 India

Soaring temperatures of cities due to urbanisation leading to possible formation of an Urban Heat Island (UHI) is becoming a growing concern for India, a developing country, with the 2nd highest population in the world. Pune is no exception to that. Over the last few decades, the increasing urban landscape of the Pune city has led to fluctuations in the daily temperatures and disturbance in the thermal fluxes. To understand the nature and the consequences of this phenomenon, it is imperative to study the temperature changes and come up with a model that can quantify these changes. Whereas numerous studies have made use of satellite images for UHI analysis, only a few of these have paid significant attention to the analysis of long term changes. Our research aims to study the temperature profile of Pune city with the help of the Landsat-7 satellite imagery. The Land Surface Temperature (LST) and Land Use Land Cover (LULC) data extracted from these images is compared to find the correlation between the two. We used Hilbert Huang Transform (HHT) for analysing trends across the North-South and East-West extent of the city. The results are then compared with the Vegetation, Impervious and Soil (VIS) classification of the cross section to identify the relation of the trend with the classification. The results obtained show that the areas with residential, industrial have an average surface temperature of around 46 °C. That is higher by 2-3 degree on an average (5-6 degree worst case) than immediate surrounding vegetated region - indicating mild urban heat island effect. But because of physical geography of the region the outermost surrounding is covered with barren land, dry grass open area etc. and have similar temperatures to that of core of the city. Thus the observations indicate very specific temperature variation along the North-South and East-West cross sections of the city.

关键词： Surface temperature

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A novel framework for simultaneous localization and mapping

A novel framework for simultaneous localization and mapping

引用

Signal Processing and Intelligent Systems Conference (SPIS)

作者： Ghazal Zand Mojtaba Taherkhani Reza Safabakhsh Robotics Research Institute AmirKabir University of Technology Tehran Iran Dep. AmirKabir University of Technology Computer Engineering and Information Technology Tehran Iran

The six Degrees of freedom (6-Dof) Simultaneous Localization and Mapping (SLAM) aims to build a map of an unknown environment and simultaneously use this map to compute the location with 6-Dof poses. To solve this problem, probabilistic approaches such as Particle Filters (PF) have become dominant methods. PF suffers from certain problems (e.g. the need for large number of particles and so on) which induce high computational complexity. In this paper, an efficient SLAM framework is proposed and new ideas for each module are presented. By combining machine vision and a PF algorithm called the Exponential Natural Particle Filter (xNPF), the predicted results converge close to the true target states. Experimental results validate the potential of the proposed approach.

关键词： Simultaneous localization and mapping Feature extraction Particle filters Global Positioning System Vehicles Computational complexity

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