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Mental Rotation: Can Familiarity Alleviate The Effects Of Complex Backgrounds?, Anthony Selkowitz
Mental Rotation: Can Familiarity Alleviate The Effects Of Complex Backgrounds?, Anthony Selkowitz
Electronic Theses and Dissertations
This dissertation investigated the effects of complex backgrounds on mental rotation. Stimulus familiarity and background familiarity were manipulated. It systematically explored how familiarizing participants to objects and complex backgrounds affects their performance on a mental rotation task involving complex backgrounds. This study had 113 participants recruited through the UCF Psychology SONA system. Participants were familiarized with a stimulus in a task where they were told to distinguish the stimulus from 3 other stimuli. A similar procedure was used to familiarize the backgrounds. The research design was a 2 stimulus familiarity (Familiarized with the Target Stimulus, not familiarized with the Target …
Ar Physics: Transforming Physics Diagrammatic Representations On Paper Into Interactive Simulations., Yao Zhou
Ar Physics: Transforming Physics Diagrammatic Representations On Paper Into Interactive Simulations., Yao Zhou
Electronic Theses and Dissertations
A problem representation is a cognitive structure created by the solver in correspondence to the problem. Sketching representative diagrams in the domain of physics encourages a problem solving strategy that starts from 'envisionment' by which one internally simulates the physical events and predicts outcomes. Research studies also show that sketching representative diagrams improves learner's performance in solving physics problems. The pedagogic benefits of sketching representations on paper make this traditional learning strategy remain pivotal and worthwhile to be preserved and integrated into the current digital learning landscape. In this paper, I describe AR Physics, an Augmented Reality based application that …
Context-Aware Mobile Augmented Reality Visualization In Construction Engineering Education, Arezoo Shirazi
Context-Aware Mobile Augmented Reality Visualization In Construction Engineering Education, Arezoo Shirazi
Electronic Theses and Dissertations
Recent studies suggest that the number of students pursuing science, technology, engineering, and mathematics (STEM) degrees has been generally decreasing. An extensive body of research cites the lack of motivation and engagement in the learning process as a major underlying reason of this decline. It has been discussed that if properly implemented, instructional technology can enhance student engagement and the quality of learning. Therefore, the main goal of this research is to implement and assess effectiveness of augmented reality (AR)-based pedagogical tools on student learning. For this purpose, two sets of experiments were designed and implemented in two different construction …
Towards Real-Time Mixed Reality Matting In Natural Scenes, Nicholas Beato
Towards Real-Time Mixed Reality Matting In Natural Scenes, Nicholas Beato
Electronic Theses and Dissertations
In Mixed Reality scenarios, background replacement is a common way to immerse a user in a synthetic environment. Properly identifying the background pixels in an image or video is a dif- ficult problem known as matting. Proper alpha mattes usually come from human guidance, special hardware setups, or color dependent algorithms. This is a consequence of the under-constrained nature of the per pixel alpha blending equation. In constant color matting, research identifies and replaces a background that is a single color, known as the chroma key color. Unfortunately, the algorithms force a controlled physical environment and favor constant, uniform lighting. …
A Wearable Head-Mounted Projection Display, Ricardo F. Martins
A Wearable Head-Mounted Projection Display, Ricardo F. Martins
Electronic Theses and Dissertations
Conventional head-mounted projection displays (HMPDs) contain of a pair of miniature projection lenses, beamsplitters, and miniature displays mounted on the helmet, as well as a retro-reflective screen placed strategically in the environment. We have extened the HMPD technology integrating the screen into a fully mobile embodiment. Some initial efforts of demonstrating this technology has been captured followed by an investigation of the diffraction effects versus image degradation caused by integrating the retro-reflective screen within the HMPD. The key contribution of this research is the conception and development of a mobileHMPD (M-HMPD). We have included an extensive analysis of macro- and …
Training Wayfinding: Natural Movement In Mixed Reality, Ruthann Savage
Training Wayfinding: Natural Movement In Mixed Reality, Ruthann Savage
Electronic Theses and Dissertations
The Army needs a distributed training environment that can be accessed whenever and wherever required for training and mission rehearsal. This paper describes an exploratory experiment designed to investigate the effectiveness of a prototype of such a system in training a navigation task. A wearable computer, acoustic tracking system, and see-through head mounted display (HMD) were used to wirelessly track users' head position and orientation while presenting a graphic representation of their virtual surroundings, through which the user walked using natural movement. As previous studies have shown that virtual environments can be used to train navigation, the ability to add …
Real-Time Monocular Vision-Based Tracking For Interactive Augmented Reality, Lisa Spencer
Real-Time Monocular Vision-Based Tracking For Interactive Augmented Reality, Lisa Spencer
Electronic Theses and Dissertations
The need for real-time video analysis is rapidly increasing in today's world. The decreasing cost of powerful processors and the proliferation of affordable cameras, combined with needs for security, methods for searching the growing collection of video data, and an appetite for high-tech entertainment, have produced an environment where video processing is utilized for a wide variety of applications. Tracking is an element in many of these applications, for purposes like detecting anomalous behavior, classifying video clips, and measuring athletic performance. In this dissertation we focus on augmented reality, but the methods and conclusions are applicable to a wide variety …
Using Augmented Reality For Studying Left Turn Maneuver At Un-Signalized Intersection And Horizontal Visibility Blockage, Ghada Moussa
Using Augmented Reality For Studying Left Turn Maneuver At Un-Signalized Intersection And Horizontal Visibility Blockage, Ghada Moussa
Electronic Theses and Dissertations
Augmented reality "AR" is a promising paradigm that can provide users with real-time, high-quality visualization of a wide variety of information. In AR, virtual objects are added to the real-world view in a real time. Using the AR technology can offer a very realistic environment for driving enhancement as well as driving performance testing under different scenarios. This can be achieved by adding virtual objects (people, vehicles, hazards, and other objects) to the normal view while driving in a safe controlled environment. In this dissertation, the feasibility of adapting the AR technology into traffic engineering was investigated. Two AR systems; …
Orienting Of Visual-Spatial Attention With Augmented Reality: Effects Of Spatial And Non-Spatial Multi-Modal Cues, Christian Jerome
Orienting Of Visual-Spatial Attention With Augmented Reality: Effects Of Spatial And Non-Spatial Multi-Modal Cues, Christian Jerome
Electronic Theses and Dissertations
Advances in simulation technology have brought about many improvements to the way we train tasks, as well as how we perform tasks in the operational field. Augmented reality (AR) is an example of how to enhance the user's experience in the real world with computer generated information and graphics. Visual search tasks are known to be capacity demanding and therefore may be improved by training in an AR environment. During the experimental task, participants searched for enemies (while cued from visual, auditory, tactile, combinations of two, or all three modality cues) and tried to shoot them while avoiding shooting the …
Conformal Tracking For Virtual Environments, Larry Dennis Davis Jr.
Conformal Tracking For Virtual Environments, Larry Dennis Davis Jr.
Electronic Theses and Dissertations
A virtual environment is a set of surroundings that appears to exist to a user through sensory stimuli provided by a computer. By virtual environment, we mean to include environments supporting the full range from VR to pure reality. A necessity for virtual environments is knowledge of the location of objects in the environment. This is referred to as the tracking problem, which points to the need for accurate and precise tracking in virtual environments. Marker-based tracking is a technique which employs fiduciary marks to determine the pose of a tracked object. A collection of markers arranged in a rigid …
Dynamic Shared State Maintenance In Distributed Virtual Environments, Felix George Hamza-Lup
Dynamic Shared State Maintenance In Distributed Virtual Environments, Felix George Hamza-Lup
Electronic Theses and Dissertations
Advances in computer networks and rendering systems facilitate the creation of distributed collaborative environments in which the distribution of information at remote locations allows efficient communication. Particularly challenging are distributed interactive Virtual Environments (VE) that allow knowledge sharing through 3D information. In a distributed interactive VE the dynamic shared state represents the changing information that multiple machines must maintain about the shared virtual components. One of the challenges in such environments is maintaining a consistent view of the dynamic shared state in the presence of inevitable network latency and jitter. A consistent view of the shared scene will significantly increase …