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Conference on mobile devices and multimedia: enabling technologies, algorithms, and applications

作者： Lindner, A. Atanassov, K. Goma, S. Qualcomm Inc San Diego CA 92121 USA

ISBN: (纸本)9781628415018

We propose a system that uses depth information for video stabilization. The system uses 2D-homographies as frame-pair transforms that are estimated with keypoints at the depth of interest. This makes the estimation more robust as the points lie on a plane. The depth of interest can be determined automatically from the depth histogram, inferred from user input such as tap-to-focus, or selected by the user;i.e., tap-to-stabilize. The proposed system can stabilize videos on the fly in a single pass and is especially suited for mobile phones with multiple cameras that can compute depth maps automatically during image acquisition.

关键词： video stabilization depth map stereo vision mobile imaging

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Concept for practical exercises for studying autonomous flying robots in a university environment: part II

Concept for practical exercises for studying autonomous flyi...

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Conference on mobile devices and multimedia: enabling technologies, algorithms, and applications

作者： Gageik, Nils Dilger, Erik Montenegro, Sergio Schoen, Stefan Wildenhein, Rico Creutzburg, Reiner Fischer, Arno Univ Wurzburg Aerosp Informat Technol D-97070 Wurzburg Germany Brandenburg Univ Appl Sci Informat & Media Brandenburg Germany

ISBN: (纸本)9781628415018

The present paper demonstrates the application of quadcopters as educational material for students in aerospace computer science, as it is already in usage today. The work with quadrotors teaches students theoretical and practical knowledge in the fields of robotics, control theory, aerospace and electrical engineering as well as embedded programming and computer science. For this the material, concept, realization and future view of such a course is discussed in this paper. Besides that, the paper gives a brief overview of student research projects following the course, which are related to the research and development of fully autonomous quadrotors.

关键词： mobile multimedia autonomous flying robots drones quadcopter quadrotor quadrocopter curriculum development practical exercises avionic laboratory

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A Privacy Protection for an mHealth Messaging System

A Privacy Protection for an mHealth Messaging System

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Conference on mobile devices and multimedia: enabling technologies, algorithms, and applications

作者： Aaleswara, Lakshmipathi Akopian, David Chronopoulos, Anthony T. Univ Texas San Antonio San Antonio TX 78249 USA

ISBN: (纸本)9781628415018

In this paper, we propose a new software system that employs features that help the organization to comply with USA HIPAA regulations. The system uses SMS as the primary way of communication to transfer information. Lack of knowledge about some diseases is still a major reason for some harmful diseases spreading. The developed system includes different features that may help to communicate amongst low income people who don't even have access to the internet. Since the software system deals with Personal Health Information (PHI) it is equipped with an access control authentication system mechanism to protect privacy. The system is analyzed for performance to identify how much overhead the privacy rules impose.

关键词： Medicine Information security Computer security Databases Telecommunications Control systems Global system for mobile communications Digital filtering mobile communications Network security

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A SENSOR DATA FORMAT INCORPORATING BATTERY CHARGE INFORMATION FOR SMARTPHONE-BASED M-HEALTH applications

A SENSOR DATA FORMAT INCORPORATING BATTERY CHARGE INFORMATIO...

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Conference on mobile devices and multimedia: enabling technologies, algorithms, and applications

作者： Escobar, Rodrigo Akopian, David Boppana, Rajendra Univ Texas San Antonio San Antonio TX 78249 USA

ISBN: (纸本)9781628415018

Remote health monitoring systems involve energy-constrained devices, such as sensors and mobile gateways. Current data formats for communication of health data, such as DICOM and HL7, were not designed for multi-sensor applications or to enable the management of power-constrained devices in health monitoring processes. In this paper, a data format suitable for collection of multiple sensor data, including readings and other operational parameters is presented. By using the proposed data format, the system management can assess battery charge consumptions and plan realistic monitoring scenarios. The proposed data format not only outperforms other known data formats in terms of readability, flexibility, interoperability and validation of compliant documents, but also enables battery charge assessment capability for realistic data collection scenarios and maintains or even reduces the overhead introduced due to formatting. Additionally, we provide analytical methods to estimate incremental battery charge consumption by various sensors and experiments to measure the actual battery drain on smartphones.

关键词： Sensors Data communications Binary data Medicine Standards development Telecommunications mobile devices Data processing Data storage servers Magnetic sensors

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Door and window image-based measurement using a mobile device

Door and window image-based measurement using a mobile devic...

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Conference on mobile devices and multimedia: enabling technologies, algorithms, and applications

作者： Ma, Guangyao Janakaraj, Manishankar Agam, Gady IIT Dept Comp Sci Chicago IL 60616 USA

ISBN: (纸本)9781628415018

We present a system for door and window image-based measurement using an Android mobile device. In this system a user takes an image of a door or window that needs to be measured and using interaction measures specific dimensions of the object. The existing object is removed from the image and a 3D model of a replacement is rendered onto the image. The visualization provides a 3D model with which the user can interact. When tested on a mobile Android platform with an 8MP camera we obtain an average measurement error of roughly 0.5%. This error rate is stable across a range of view angles, distances from the object, and image resolutions. The main advantages of our mobile device application for image measurement include measuring objects for which physical access is not readily available, documenting in a precise manner the locations in the scene where the measurements were taken, and visualizing a new object with custom selections inside the original view.

关键词： Image-based measurement image-based rendering window measurement door measurement mobile device computer vision image rectification projective map estimation

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Security risk of medical devices in IT networks - the case of an infusion and infusion syringe pump

Security risk of medical devices in IT networks - the case o...

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Conference on mobile devices and multimedia: enabling technologies, algorithms, and applications

作者： Knackmuss, Jenny Moeller, Thomas Pommerien, Wilfried Creutzburg, Reiner Brandenburg Univ Appl Sci Dept Informat & Media D-14737 Brandenburg Germany Assecor GmbH D-10369 Berlin Germany Stadt Klinikum Brandenburg GmbH Zentrum Innere Med 2 D-14770 Brandenburg Germany Med Hsch Brandenburg CAMPUS GmbH D-16816 Neuruppin Germany

ISBN: (纸本)9781628415018

Nowadays, wearable and implantable medical devices are being increasingly deployed to improve diagnosis, monitoring, and therapy for various medical conditions. Compared to other types of electronics and computing systems, security attacks on these medical devices have extreme consequences and must be carefully analyzed and prevented with strongest efforts. Often, the security vulnerabilities of such systems are not well understood or underestimated. The aim of this paper is to demonstrate security attacks that can easily be done in the laboratory on a popular infusion pump on the market, and also propose defenses against such attacks.

关键词： medical device security security of medical devices hacking medical devices hacking infusion pumps infusion pump wearable medical devices

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A virtualization mechanism for real-time multimedia-assisted mobile food recognition application in cloud computing

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CLUSTER COMPUTING-THE JOURNAL OF NETWORKS SOFTWARE TOOLS AND applications 2015年第3期18卷 1099-1110页

作者： Pouladzadeh, Parisa Peddi, Vijay Bharat Kuhad, Pallavi Yassine, Abdulsalam Shirmohammadi, Shervin Univ Ottawa Distributed & Collaborat Virtual Environm Res Lab Ottawa ON Canada Istanbul Sehir Univ Coll Engn Istanbul Turkey Istanbul Sehir Univ Coll Nat Sci Istanbul Turkey

The integration of multimedia-assisted healthcare systems with could-computing services and mobile technologies has led to increased accessibility for healthcare providers and patients. Utilizing cloud computing infrastructures and virtualization technologies allows for the transformation of traditional healthcare systems that demand manual care and monitoring to more salient, automatic and cost effective systems. The goal of this paper is to develop a multimedia-assisted mobile healthcare application using cloud-computing virtualization technologies. We consider calorie measurement as an example healthcare application that can benefit from cloud-computing virtualization technology. The key functionalities of our application entail image segmentation, image processing and deep learning algorithms for food classification and recognition. Client side devices (e.g. smartphones, tablets etc.) have limitations in handling time sensitive and computationally intensive algorithms pertained to our application. Image processing and deep learning algorithms, used in food recognition and calorie measurement, consume devices' batteries quickly, which is inconvenient for the user. It is also very challenging for client side devices to scale for large number of data and images, as needed for food recognition. The entire process is time-consuming and inefficient and discomforting from users' perspective and may deter them from using the application. In this paper, we address these challenges by proposing a virtualization mechanism in cloud computing that utilizes the Android architecture. Android allows for parting an application into activities run by the front-end user and services run by the back-end tasks. In the proposed virtualization mechanism, we use both the hosted and the hypervisor models to publish our Android-based food recognition and calorie measurement application in the cloud. By so doing, the users of our application can control their virtual smartphone operations

关键词： Cloud computing Virtualization Healthcare Food recognition multimedia

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Toward Energy-Aware Balancing of mobile Graphics

Toward Energy-Aware Balancing of Mobile Graphics

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Conference on mobile devices and multimedia: enabling technologies, algorithms, and applications

作者： Stavrakis, Efstathios Polychronis, Marios Pelekanos, Nectarios Artusi, Alessandro Hadjichristodoulou, Panayiotis Chrysanthou, Yiorgos Cyprus Inst CY-2121 Nicosia Cyprus Univ Cyprus CY-1678 Nicosia Cyprus ARMES Ltd CY-1678 Nicosia Cyprus Univ Girona Girona 17071 Spain

ISBN: (纸本)9781628415018

In the area of computer graphics the design of hardware and software has primarily been driven by the need to achieve maximum performance. Energy efficiency was usually neglected, assuming that a stable always-on power source was available. However, the advent of the mobile era has brought into question these ideas and designs in computer graphics since mobile devices are both limited by their computational capabilities and their energy sources. Aligned to this emerging need in computer graphics for energy efficiency analysis we have setup a software framework to obtain power measurements from 3D scenes using off-the-shelf hardware that allows for sampling the energy consumption over the power rails of the CPU and GPU. Our experiments include geometric complexity, texture resolution and common CPU and GPU workloads. The goal of this work is to combine the knowledge obtained from these measurements into a prototype energy-aware balancer of processing resources. The balancer dynamically selects the rendering parameters and uses a simple framerate-based dynamic frequency scaling strategy. Our experimental results demonstrate that our power saving framework can achieve savings of approximately 40%.

关键词： energy efficient computer graphics

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An Efficient Contents-adaptive Backlight Control Method for mobile devices

An Efficient Contents-adaptive Backlight Control Method for ...

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Conference on mobile devices and multimedia: enabling technologies, algorithms, and applications

作者： Chen, Qiao Song Yan, Ya Xing Zhang, Xiao Mou Cai, Hua Deng, Xin Wang, Jin Chongqing Univ Posts & Telecommun Chongqing Key Lab Computat Intelligence Chongqing 400065 Peoples R China Chongqing Univ Posts & Telecommun Coll Comp Sci & Technol Chongqing 400065 Peoples R China

ISBN: (纸本)9781628415018

For most of mobile devices with a large screen, image quality and power consumption are both of the major factors affecting the consumers' preference. Contents-adaptive backlight control (CABC) method can be utilized to adjust the backlight and promote the performance of mobile devices. Unlike the previous works mostly focusing on the reduction of power consumption, both of image quality and power consumption are taken into account in the proposed method. Firstly, region of interest (ROI) is detected to divide image into two parts: ROI and non-ROI. Then, three attributes including entropy, luminance, and saturation information in ROI are calculated. To achieve high perceived image quality in mobile devices, optimal value of backlight can be calculated by a linear combination of the aforementioned attributes. Coefficients of the linear combination are determined by applying the linear regression to the subjective scores of human visual experiments and objective values of the attributes. Based on the optimal value of backlight, displayed image data are processed brightly and backlight is darkened to reduce the power consumption of backlight later. Here, the ratios of increasing image data and decreasing backlight functionally depend on the luminance information of displayed image. Also, the proposed method is hardware implemented. Experimental results indicate that the proposed technique exhibits better performance compared to the conventional methods.

关键词： contents-adaptive backlight control image quality power consumption region of interest correlation coefficient

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Cross-standard user description in mobile, medical oriented virtual collaborative environments

Cross-standard user description in mobile, medical oriented ...

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Conference on mobile devices and multimedia: enabling technologies, algorithms, and applications

作者： Ganji, Rama Rao Mitrea, Mihai Joveski, Bojan Chammem, Afef Telecom SudParis ARTEMIS Dept Inst Mines Telecom Paris France UMR CNRS 8145 Paris France

ISBN: (纸本)9781628415018

By combining four different open standards belonging to the ISO/IEC JTC1/SC29 WG11 (a.k.a. MPEG) and W3C, this paper advances an architecture for mobile, medical oriented virtual collaborative environments. The various users are represented according to MPEG-UD (MPEG User Description) while the security issues are dealt with by deploying the WebID principles. On the server side, irrespective of their elementary types (text, image, video, 3D, ...), the medical data are aggregated into hierarchical, interactive multimedia scenes which are alternatively represented into MPEG-4 BiFS or HTML5 standards. This way, each type of content can be optimally encoded according to its particular constraints (semantic, medical practice, network conditions, etc.). The mobile device should ensure only the displaying of the content (inside an MPEG player or an HTML5 browser) and the capturing of the user interaction. The overall architecture is implemented and tested under the framework of the MEDUSA European project, in partnership with medical institutions. The testbed considers a server emulated by a PC and heterogeneous user devices (tablets, smartphones, laptops) running under iOS, Android and Windows operating systems. The connection between the users and the server is alternatively ensured by WiFi and 3G/4G networks.

关键词： MPEG-4 W3C WebID MPEG-UD HTML5 MEDUSA application virtualization remote desktop protocol

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