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Graphics and Human Computer Interfaces Commons™

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2011

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Articles 31 - 42 of 42

Full-Text Articles in Graphics and Human Computer Interfaces

In-Degree Dynamics Of Large-Scale P2p Systems, Zhongmei Yao, Daren B. H. Cline, Dmitri Loguinov Jan 2011

In-Degree Dynamics Of Large-Scale P2p Systems, Zhongmei Yao, Daren B. H. Cline, Dmitri Loguinov

Computer Science Faculty Publications

This paper builds a complete modeling framework for understanding user churn and in-degree dynamics in unstructured P2P systems in which each user can be viewed as a stationary alternating renewal process. While the classical Poisson result on the superposition of n stationary renewal processes for n→∞ requires that each point process become sparser as n increases, it is often difficult to rigorously show this condition in practice. In this paper, we first prove that despite user heterogeneity and non-Poisson arrival dynamics, a superposition of edge-arrival processes to a live user under uniform selection converges to a Poisson process when …

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Tracking And Recognizing Multiple Faces Using Kalman Filter And Modularpca, Jacob Foytik, Praveen Sankaran, Vijayan Asari Jan 2011

Tracking And Recognizing Multiple Faces Using Kalman Filter And Modularpca, Jacob Foytik, Praveen Sankaran, Vijayan Asari

Computer Science Faculty Publications

Real-time tracking and recognizing multiple faces in complex environments has the ability to provide efficient security automation to large areas. Previous research has shown that Kalman filter techniques paired with the traditional face detection methods can be used to track one or more faces in a viewing region, but prove unreliable under variant conditions due to the inability to reliably distinguish between multiple trackers. A real-time face tracking and recognition system is presented that is capable of processing multiple faces simultaneously. The proposed system utilizes the Kalman filter for tracking and uses a low-level recognition system to properly distinguish between …

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Is There A Core Set Of Skills For Visual Analysis Across Different Imaging Technologies?, Craig Hm Donald Jan 2011

Is There A Core Set Of Skills For Visual Analysis Across Different Imaging Technologies?, Craig Hm Donald

Australian Security and Intelligence Conference

This research examines the technological challenges posed by security imaging technologies for human visual analysis of images. Imaging technologies are increasing becoming part of an overall security strategy that incorporates a range of camera technologies, x-ray technologies, and other electromagnetic imaging such as millimetre wave and terahertz based systems. Still and video image types are increasingly becoming presented to viewers or screeners in forms that are only representative in nature and highly abstract, and the use of filters is increasing the complexity of interpretation. Despite a range of factors that are being looked at to enhance visual analysis, the contribution …

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Trends And Controversies: Ai, Virtual Worlds, And Massively Multiplayer Online Games, Hsinchun Chen, Yulei Zhang, W. S. Bainbridge, Kyong Jin Shim, N. Pathak, M. A. Ahmad, C. Delong, Z. Borbora, A. Mahapatra, J. Srivastava Jan 2011

Trends And Controversies: Ai, Virtual Worlds, And Massively Multiplayer Online Games, Hsinchun Chen, Yulei Zhang, W. S. Bainbridge, Kyong Jin Shim, N. Pathak, M. A. Ahmad, C. Delong, Z. Borbora, A. Mahapatra, J. Srivastava

Research Collection School Of Computing and Information Systems

The rich social media data generated in virtual worlds has important implications for business, education, social science, and society at large. Similarly, massively multiplayer online games (MMOGs) have become increasingly popular and have online communities comprising tens of millions of players. They serve as unprecedented tools for theorizing about and empirically modeling the social and behavioral dynamics of individuals, groups, and networks within large communities. Some technologists consider virtual worlds and MMOGs to be likely candidates to become the Web 3.0. AI can play a significant role, from multiagent avatar research and immersive virtual interface design to virtual world and …

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A Low Cost Adaptive Graphical User Interface For The Visually Handicapped With Multiple Conditions, David Veal, Stanislaw Maj Jan 2011

A Low Cost Adaptive Graphical User Interface For The Visually Handicapped With Multiple Conditions, David Veal, Stanislaw Maj

Research outputs 2011

Limited trials have been demonstrated that a Graphical User Interface (GUI) for the visually handicapped called Dynamic Pattern System (DPS) can adaptively utilize residual vision by generating different patterns, colors and shapes. Low vision simulators, used by normally sighted, have allowed researchers to clearly identify visual impairments that can be helped by DPS. However, it is not uncommon for the visually handicapped to suffer from multiple conditions having a multiplicative degenerative effect on their sight. This paper demonstrates how DPS can be used to assist individuals with compound sight disorders.

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Concept-Driven Multi-Modality Fusion For Video Search, Xiao-Yong Wei, Yu-Gang Jiang, Chong-Wah Ngo Jan 2011

Concept-Driven Multi-Modality Fusion For Video Search, Xiao-Yong Wei, Yu-Gang Jiang, Chong-Wah Ngo

Research Collection School Of Computing and Information Systems

As it is true for human perception that we gather information from different sources in natural and multi-modality forms, learning from multi-modalities has become an effective scheme for various information retrieval problems. In this paper, we propose a novel multi-modality fusion approach for video search, where the search modalities are derived from a diverse set of knowledge sources, such as text transcript from speech recognition, low-level visual features from video frames, and high-level semantic visual concepts from supervised learning. Since the effectiveness of each search modality greatly depends on specific user queries, prompt determination of the importance of a modality …

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Mining Event Structures From Web Videos, Xiao Wu, Yi-Jie Lu, Qiang Peng, Chong-Wah Ngo Jan 2011

Mining Event Structures From Web Videos, Xiao Wu, Yi-Jie Lu, Qiang Peng, Chong-Wah Ngo

Research Collection School Of Computing and Information Systems

The article is discussing the issues of mining event structures from Web video search results using text analysis, burst detection, and clustering as with the proliferation of social media, the volume of Web videos have grown exponentially.

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Enhancement Technique For Aerial Images, Sertan Erkanli, Ahmet Gungor Pakfiliz, Jiang Li Jan 2011

Enhancement Technique For Aerial Images, Sertan Erkanli, Ahmet Gungor Pakfiliz, Jiang Li

Electrical & Computer Engineering Faculty Publications

Recently, we proposed an enhancement technique for uniformly and non-uniformly illuminated dark images that provides high color accuracy and better balance between the luminance and the contrast in images to improve the visual representations of digital images. In this paper we define an improved version of the proposed algorithm to enhance aerial images in order to reduce the gap between direct observation of a scene and its recorded image.

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Visual Learning Styles Among Digital Natives, Eric Palmer Jan 2011

Visual Learning Styles Among Digital Natives, Eric Palmer

Department of Computer Graphics Technology Degree Theses

This study explored the concept of digital nativity and its educational implications, including application of the learning styles hypothesis. The concept of digital natives, first put forth by Marc Prensky, introduced the notion that individuals raised in a technological environment have developed in such a way as to utilize information differently than the non-native generations before them. This study examined the possibility that these differences may include an increased efficiency in the utilization of narrative imagery versus textual information. The potential benefit of utilizing narrative imagery as an instructional tool is discussed. An experimental test application was developed for the …

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Designing For The User: Exploring The Interface Design Of Web Services, Katelyn Anne Haw Jan 2011

Designing For The User: Exploring The Interface Design Of Web Services, Katelyn Anne Haw

Honors Program Theses

My thesis investigated the ideas of usability and the design process to create software that is considered usable. I developed a web interface for a Plan of Study Application that would help students make the educated decisions about their studies at UNI. Throughout the development of this application I addressed the following questions: "What makes an interface usable?" and "How does the design process affect a system's usability?" User interface design is an interdisciplinary process and it often involves computer programmers and graphic designers working together. Without clear communication and vision between the groups, the software being developed has little …

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3d Face Reconstruction From Limited Images Based On Differential Evolution, Qun Wang, Jiang Li, Vijayan K. Asari, Mohammad A. Karim, Andrew G. Tescher (Ed.) Jan 2011

3d Face Reconstruction From Limited Images Based On Differential Evolution, Qun Wang, Jiang Li, Vijayan K. Asari, Mohammad A. Karim, Andrew G. Tescher (Ed.)

Electrical & Computer Engineering Faculty Publications

3D face modeling has been one of the greatest challenges for researchers in computer graphics for many years. Various methods have been used to model the shape and texture of faces under varying illumination and pose conditions from a single given image. In this paper, we propose a novel method for the 3D face synthesis and reconstruction by using a simple and efficient global optimizer. A 3D-2D matching algorithm which employs the integration of the 3D morphable model (3DMM) and the differential evolution (DE) algorithm is addressed. In 3DMM, the estimation process of fitting shape and texture information into 2D …

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Investigating Intrinsic And Extrinsic Variables During Simulated Internet Search, Molly M. Liechty, Poornima Madhaven Jan 2011

Investigating Intrinsic And Extrinsic Variables During Simulated Internet Search, Molly M. Liechty, Poornima Madhaven

Psychology Faculty Publications

Using an eye tracker we examined decision-making processes during an internet search task. Twenty experienced homebuyers and twenty-five undergraduates from Old Dominion University viewed homes on a simulated real estate website. Several of the homes included physical properties that had the potential to negatively impact individual perceptions. These negative externalities were either easy to change (Level 1) or impossible to change (Level 2). Eye movements were analyzed to examine the relationship between participants' "stated preferences"[verbalized preferences], "revealed preferences" [actual decisions[, and experience. Dwell times, fixation durations/counts, and saccade counts/amplitudes were analyzed. Results revealed that experienced homebuyers demonstrated a more refined …

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