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检索条件"任意字段=Multimedia on Mobile Devices 2012;and Multimedia Content Access: Algorithms and Systems VI"

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Proceedings of SPIE-IS and T Electronic Imaging - multimedia on mobile devices 2012;and multimedia content access: algorithms and systems vi

Proceedings of SPIE-IS and T Electronic Imaging - Multimedia...

引用

multimedia on mobile devices 2012;and multimedia content access: algorithms and systems vi

ISBN: (纸本)9780819489517

The proceedings contain 31 papers. The topics discussed include: location-aware gang graffiti acquisition and browsing on a mobile device;dietary intake assessment using integrated sensors and software;FCam for multiple cameras;continuously adjustable Pulfrich spectacles for mobile devices;parameters of the human 3D gaze while observing portable autostereoscopic display: a model and measurement results;deblocking of mobile stereo video;SUPL support for mobile devices;measuring ionizing radiation with a mobile device;design and evaluation of security multimedia warnings for children's smartphones;using wi-fi hotspots as an intrusion vector into corporate networks;frame rate up-conversion assisted with camera auto exposure information;and fused fibonacci-like (p,q) sequences with compression and barcoding applications.

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Forensics of location data collected by Google Android mobile devices

Forensics of location data collected by Google Android mobil...

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Conference on multimedia on mobile devices and multimedia content access - algorithms and systems vi

作者： Kroeger, Knut Creutzburg, Reiner Brandenburg Univ Appl Sci Dept Informat & Media D-14770 Brandenburg Germany

This paper deals with forensic investigation of stored location data collected by Android mobile devices. The main aspects of the study are the extraction and examination of the location data and the possibilities for... 详细信息

ISBN: (纸本)9780819489517

关键词： Android forensics mobile forensics rooting Android Oxygen Forensic Suite 2011 location data forensics

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Overview of potential forensic analysis of an Android smartphone

Overview of potential forensic analysis of an Android smartp...

引用

Conference on multimedia on mobile devices and multimedia content access - algorithms and systems vi

作者： Sack, Stefan Kroeger, Knut Creutzburg, Reiner Brandenburg Univ Appl Sci Dept Informat & Media D-14770 Brandenburg Germany

ISBN: (纸本)9780819489517

This paper deals with the forensic examination of Android smartphones. The structure of the Android system was analyzed and a forensic guide was created. As an example this guide was used to examine a HTC Desire. The conclusion of this paper is the fact that all data stored on the smartphone can be examined. The main problem is that some of the used procedures lack forensic requirements.

关键词： Android cell phone mobile phone forensics rooting forensic tools

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Location-Aware Gang Graffiti Acquisition and Browsing on a mobile Device

Location-Aware Gang Graffiti Acquisition and Browsing on a M...

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Conference on multimedia on mobile devices and multimedia content access - algorithms and systems vi

作者： Parra, Albert Boutin, Mireille Delp, Edward J. Purdue Univ Video & Image Proc Lab VIPER Sch Elect & Comp Engn W Lafayette IN 47907 USA Purdue Univ CIL Sch Elect & Comp Engn W Lafayette IN 47907 USA

ISBN: (纸本)9780819489517

In this paper we describe a mobile-based system that allows first responders to identify and track gang graffiti by combining the use of image analysis and location-based-services. The gang graffiti image and metadata (geoposition, date and time) obtained automatically are transferred to a server and uploaded to a database of graffiti images. The database can then be queried with the matched results sent back to the mobile device where the user can then review the results and provide extra inputs to refine the information.

关键词： gang graffiti mobile telephone geolocation interactive map

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Raster Image Adaptation for mobile devices using Profiles

Raster Image Adaptation for Mobile Devices using Profiles

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Conference on multimedia on mobile devices and multimedia content access - algorithms and systems vi

作者： Rosenbaum, Rene Hamann, Bernd Univ Calif Davis Inst Data Anal & Visualizat Dept Comp Sci Davis CA 95616 USA

ISBN: (纸本)9780819489517

Focusing on digital imagery, this paper introduces a strategy to handle heterogeneous hardware in mobile environments. Constrained system resources of most mobile viewing devices require contents that are tailored to the requirements of the user and the capabilities of the device. Appropriate image adaptation is still an unsolved research question. Due to the complexity of the problem, available solutions are either too resource-intensive or inflexible to be more generally applicable. The proposed approach is based on scalable image compression and progressive refinement as well as data and user profiles. A scalable image is created once and used multiple times for different kinds of devices and user requirements. Profiles available on the server side allow for an image representation that is adapted to the most important resources in mobile computing: screen space, computing power, and the volume of the transmitted data. Options for progressively refining content thereby allow for a fluent viewing experience during adaptation. Due to its flexibility and low complexity, the proposed solution is much more general compared to related approaches. To document the advantages of our approach we provide empirical results obtained in experiments with an implementation of the method.

关键词： Device adaptation Scalable image coding Progressive refinement Profiles mobile environments

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Template-Based Education Toolkit for mobile Platforms

Template-Based Education Toolkit for Mobile Platforms

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Conference on multimedia on mobile devices and multimedia content access - algorithms and systems vi

作者： Golagani, Santosh Chandana Esfahanian, Moosa Akopian, David Univ Texas San Antonio San Antonio TX 78249 USA

ISBN: (纸本)9780819489517

Nowadays mobile phones are the most widely used portable devices which evolve very fast adding new features and improving user experiences. The latest generation of hand-held devices called smartphones is equipped with superior memory, cameras and rich multimedia features, empowering people to use their mobile phones not only as a communication tool but also for entertainment purposes. With many young students showing interest in learning mobile application development one should introduce novel learning methods which may adapt to fast technology changes and introduce students to application development. mobile phones become a common device, and engineering community incorporates phones in various solutions. Overcoming the limitations of conventional undergraduate electrical engineering (EE) education this paper explores the concept of template-based based education in mobile phone programming. The concept is based on developing small exercise templates which students can manipulate and revise for quick hands-on introduction to the application development and integration. Android platform is used as a popular open source environment for application development. The exercises relate to image processing topics typically studied by many students. The goal is to enable conventional course enhancements by incorporating in them short hands-on learning modules.

关键词： Android platform hands-on learning image processing mobile applications

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Swimmer Detection and Pose Estimation for Continuous Stroke Rate Determination

Swimmer Detection and Pose Estimation for Continuous Stroke ...

引用

Conference on multimedia on mobile devices and multimedia content access - algorithms and systems vi

作者： Zecha, Dan Greif, Thomas Lienhart, Rainer Univ Augsburg Multimedia Comp Lab Augsburg Germany

ISBN: (纸本)9780819489517

In this work we propose a novel approach to automatically detect a swimmer and estimate his/her pose continuously in order to derive an estimate of his/her stroke rate given that we observe the swimmer from the side. We divide a swimming cycle of each stroke into several intervals. Each interval represents a pose of the stroke. We use specifically trained object detectors to detect each pose of a stroke within a video and count the number of occurrences per time unit of the most distinctive poses (so-called key poses) of a stroke to continuously infer the stroke rate. We extensively evaluate the overall performance and the influence of the selected poses for all swimming styles on a data set consisting of a variety of swimmers.

关键词： Object detection pose estimation stroke rate estimation swimming channel

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Collecting fingerprints for recognition using mobile phone cameras

Collecting fingerprints for recognition using mobile phone c...

引用

Conference on multimedia on mobile devices and multimedia content access - algorithms and systems vi

作者： Yang, Bian Li, Xue Busch, Christoph Gjovik Univ Coll N-2802 Gjovik Oppland Norway

ISBN: (纸本)9780819489517

We present in this paper a sample quality control approach for the case using a mobile phone's camera as a fingerprint sensor for fingerprint recognition. Our approach directly estimates the maximum ridge frequency orientation by the amplitude-frequency features of the Fast Fourier Transform and takes the frequency features' difference in two perpendicular orientations as a distinguishing feature for ridge-like patterns. Then a decision criterion which combines the frequency components' energy and ridge orientation features is used to determine if an image block should be classified as high-quality fingerprint area or not. The number of such high-quality blocks can thus be used to indicate the whole fingerprint sample's quality. Experiments show this approach's effectiveness in distinguishing the high-quality blocks from other low-quality ones or background area. Mapping the quality metric to the sample utility as derived from the the NIST minutiae extractor "mindtct" function is also given to verify the approach's quality prediction effectiveness.

关键词： Fingerprint quality assessment mobile phone camera

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White Synthesis with User Input for Color Balancing on mobile Camera systems

White Synthesis with User Input for Color Balancing on Mobil...

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Conference on multimedia on mobile devices and multimedia content access - algorithms and systems vi

作者： Srivastava, Satyam Xu, Chang Delp, Edward J. Purdue Univ Video & Image Proc Lab VIPER Sch Elect & Comp Engn W Lafayette IN 47907 USA

ISBN: (纸本)9780819489517

In this paper we extend the manual white balancing technique available on most imaging devices by allowing a user to specify arbitrary colors in the scene. We derive an interpolation technique to assign weights to the arbitrary colors which are then used to estimate the RGB complements corresponding to a white target. We obtain the user input by displaying a captured image alongside a color grid of commonly occurring colors. The user specifies color pairs-patches in the scene and veridical colors on the grid. We then use these pairs to estimate the white point with our interpolation method. The estimated white point is then used to construct a diagonal transform to determine the camera output under a desired illuminant. We will present results from testing our methods on images acquired under several illumination conditions. Our approach is very suitable for mobile devices because most mobile devices are equipped with moderately sophisticated imaging systems and our method allows better color capture with relatively little user input. Further, we can realize our method on mobile devices since these devices have built-in tools for graphical user input. Our method can be useful in several photography and image analysis applications.

关键词： White balance arbitrary illumination mobile device

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Measuring ionizing radiation with a mobile device

Measuring ionizing radiation with a mobile device

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Conference on multimedia on mobile devices and multimedia content access - algorithms and systems vi

作者： Michelsburg, Matthias Fehrenbach, Thomas Leon, Fernando Puente Inst Ind Informat Technol Karlsruhe Inst Technol D-76131 Karlsruhe Germany

ISBN: (纸本)9780819489517

In cases of nuclear disasters it is desirable to know one's personal exposure to radioactivity and the related health risk. Usually, Geiger-Mueller tubes are used to assess the situation. Equipping everyone with such a device in a short period of time is very expensive. We propose a method to detect ionizing radiation using the integrated camera of a mobile consumer device, e. g., a cell phone. In emergency cases, millions of existing mobile devices could then be used to monitor the exposure of its owners. In combination with internet access and GPS, measured data can be collected by a central server to get an overview of the situation. During a measurement, the CMOS sensor of a mobile device is shielded from surrounding light by an attachment in front of the lens or an internal shutter. The high-energy radiation produces free electrons on the sensor chip resulting in an image signal. By image analysis by means of the mobile device, signal components due to incident ionizing radiation are separated from the sensor noise. With radioactive sources present significant increases in detected pixels can be seen. Furthermore, the cell phone application can make a preliminary estimate on the collected dose of an individual and the associated health risks.

关键词： ionizing radiation radioactivity mobile device cell phone smartphone CMOS imaging chip camera

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