Current Search: Reconstruction (x)
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Pages
- Title
- Summary of the world federation plan: An outline of a practical and detailed plan for world settlement.
- Creator
-
Culbertson, Ely, World federation, inc
- Date Issued
- 1943
- Identifier
- 2700028, CFDT2700028, ucf:5153
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/FCLA/DT/2700028
- Title
- Curvelets and the Radon Transform.
- Creator
-
Dickerson, Jill, Katsevich, Alexander, Tamasan, Alexandru, Moore, Brian, University of Central Florida
- Abstract / Description
-
Computed Tomography (CT) is the standard in medical imaging field. In this study, we look at the curvelet transform in an attempt to use it as a basis for representing a function. In doing so, we seek a way to reconstruct a function from the Radon data that may produce clearer results. Using curvelet decomposition, any known function can be represented as a sum of curvelets with corresponding coefficients. It can be shown that these corresponding coefficients can be found using the Radon data...
Show moreComputed Tomography (CT) is the standard in medical imaging field. In this study, we look at the curvelet transform in an attempt to use it as a basis for representing a function. In doing so, we seek a way to reconstruct a function from the Radon data that may produce clearer results. Using curvelet decomposition, any known function can be represented as a sum of curvelets with corresponding coefficients. It can be shown that these corresponding coefficients can be found using the Radon data, even if the function is unknown. The use of curvelets has the potential to solve partial or truncated Radon data problems. As a result, using a curvelet representation to invert radon data allows the chance of higher quality images to be produced. This paper examines this method of reconstruction for computed tomography (CT). A brief history of CT, an introduction to the theory behind the method, and implementation details will be provided.
Show less - Date Issued
- 2013
- Identifier
- CFE0004674, ucf:49852
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004674
- Title
- Marshall plan--recovery or war?.
- Creator
-
Allen, James Stewart
- Date Issued
- 1948
- Identifier
- 671398, CFDT671398, ucf:5565
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/FCLA/DT/671398
- Title
- RECONSTRUCTING ANCIENT BURIALS AT LOMA DON GENARO.
- Creator
-
Kulenguski, Alexandra M, Barber, Sarah B., University of Central Florida
- Abstract / Description
-
This thesis reconstructs and analyzes a Classic period (AD 250-800) burial collection from the archaeological site of Loma Don Genaro in Oaxaca, Mexico. This research aims to address two main questions: 1.) What information about the burial collection is available through the archaeological archives? 2.) What does this information tell us about social organization during the Classic period at Loma Don Genaro? In order to address these questions, the following objectives were explored: to...
Show moreThis thesis reconstructs and analyzes a Classic period (AD 250-800) burial collection from the archaeological site of Loma Don Genaro in Oaxaca, Mexico. This research aims to address two main questions: 1.) What information about the burial collection is available through the archaeological archives? 2.) What does this information tell us about social organization during the Classic period at Loma Don Genaro? In order to address these questions, the following objectives were explored: to reconstruct ancient burials using archival material; to describe the burial demography across the site; to describe variation in grave goods; to relatively date and order the burials chronologically; to draw conclusions about social organization through patterns visible in the burial record. This project included bringing together existing archival records such as field drawings, burial record forms, lot forms, field maps, photographs, and field notes in order to reconstruct detailed burial records for 25 individuals. This recontextualization of the burial collection has made the data concerning each burial easily accessible, enabling further data to be gleaned from the remains. After creating a usable data management system for the burial collection and its associated records, the burials were analyzed. Analysis included: providing relative dates for the burials and chronologically ordering the burials using stratigraphic information; demographic analysis in order to identify the number adults, juveniles, males, and females in the collection, as well as the ages of each individual; analysis of burial position and orientation; analysis of the diversity of both the amount and type of grave goods (such as ceramic vessels, jade beads, figurines, and lithics) present in each burial. Several patterns relating to sex, age, and social status across the site were identified: there is an emphasis on adult burials with minimal children in the burial collection; the more elaborate burials reflecting a higher social status for the buried individuals were those with greater than ten ceramic vessels, had slab-lined burials, or were slab-lined and contained greater than ten vessels, and contained both male and female individuals. The data from this thesis provide an important snapshot of life during a key period of social change in ancient Mexico.
Show less - Date Issued
- 2018
- Identifier
- CFH2000335, ucf:45795
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000335
- Title
- MULTI-VIEW APPROACHES TO TRACKING, 3D RECONSTRUCTION AND OBJECT CLASS DETECTION.
- Creator
-
khan, saad, Shah, Mubarak, University of Central Florida
- Abstract / Description
-
Multi-camera systems are becoming ubiquitous and have found application in a variety of domains including surveillance, immersive visualization, sports entertainment and movie special effects amongst others. From a computer vision perspective, the challenging task is how to most efficiently fuse information from multiple views in the absence of detailed calibration information and a minimum of human intervention. This thesis presents a new approach to fuse foreground likelihood information...
Show moreMulti-camera systems are becoming ubiquitous and have found application in a variety of domains including surveillance, immersive visualization, sports entertainment and movie special effects amongst others. From a computer vision perspective, the challenging task is how to most efficiently fuse information from multiple views in the absence of detailed calibration information and a minimum of human intervention. This thesis presents a new approach to fuse foreground likelihood information from multiple views onto a reference view without explicit processing in 3D space, thereby circumventing the need for complete calibration. Our approach uses a homographic occupancy constraint (HOC), which states that if a foreground pixel has a piercing point that is occupied by foreground object, then the pixel warps to foreground regions in every view under homographies induced by the reference plane, in effect using cameras as occupancy detectors. Using the HOC we are able to resolve occlusions and robustly determine ground plane localizations of the people in the scene. To find tracks we obtain ground localizations over a window of frames and stack them creating a space time volume. Regions belonging to the same person form contiguous spatio-temporal tracks that are clustered using a graph cuts segmentation approach. Second, we demonstrate that the HOC is equivalent to performing visual hull intersection in the image-plane, resulting in a cross-sectional slice of the object. The process is extended to multiple planes parallel to the reference plane in the framework of plane to plane homologies. Slices from multiple planes are accumulated and the 3D structure of the object is segmented out. Unlike other visual hull based approaches that use 3D constructs like visual cones, voxels or polygonal meshes requiring calibrated views, ours is purely-image based and uses only 2D constructs i.e. planar homographies between views. This feature also renders it conducive to graphics hardware acceleration. The current GPU implementation of our approach is capable of fusing 60 views (480x720 pixels) at the rate of 50 slices/second. We then present an extension of this approach to reconstructing non-rigid articulated objects from monocular video sequences. The basic premise is that due to motion of the object, scene occupancies are blurred out with non-occupancies in a manner analogous to motion blurred imagery. Using our HOC and a novel construct: the temporal occupancy point (TOP), we are able to fuse multiple views of non-rigid objects obtained from a monocular video sequence. The result is a set of blurred scene occupancy images in the corresponding views, where the values at each pixel correspond to the fraction of total time duration that the pixel observed an occupied scene location. We then use a motion de-blurring approach to de-blur the occupancy images and obtain the 3D structure of the non-rigid object. In the final part of this thesis, we present an object class detection method employing 3D models of rigid objects constructed using the above 3D reconstruction approach. Instead of using a complicated mechanism for relating multiple 2D training views, our approach establishes spatial connections between these views by mapping them directly to the surface of a 3D model. To generalize the model for object class detection, features from supplemental views (obtained from Google Image search) are also considered. Given a 2D test image, correspondences between the 3D feature model and the testing view are identified by matching the detected features. Based on the 3D locations of the corresponding features, several hypotheses of viewing planes can be made. The one with the highest confidence is then used to detect the object using feature location matching. Performance of the proposed method has been evaluated by using the PASCAL VOC challenge dataset and promising results are demonstrated.
Show less - Date Issued
- 2008
- Identifier
- CFE0002073, ucf:47593
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002073
- Title
- HEURISTIC 3D RECONSTRUCTION OF IRREGULAR SPACED LIDAR.
- Creator
-
Shorter, Nicholas, Kasparis, Takis, University of Central Florida
- Abstract / Description
-
As more data sources have become abundantly available, an increased interest in 3D reconstruction has emerged in the image processing academic community. Applications for 3D reconstruction of urban and residential buildings consist of urban planning, network planning for mobile communication, tourism information systems, spatial analysis of air pollution and noise nuisance, microclimate investigations, and Geographical Information Systems (GISs). Previous, classical, 3D reconstruction...
Show moreAs more data sources have become abundantly available, an increased interest in 3D reconstruction has emerged in the image processing academic community. Applications for 3D reconstruction of urban and residential buildings consist of urban planning, network planning for mobile communication, tourism information systems, spatial analysis of air pollution and noise nuisance, microclimate investigations, and Geographical Information Systems (GISs). Previous, classical, 3D reconstruction algorithms solely utilized aerial photography. With the advent of LIDAR systems, current algorithms explore using captured LIDAR data as an additional feasible source of information for 3D reconstruction. Preprocessing techniques are proposed for the development of an autonomous 3D Reconstruction algorithm. The algorithm is designed for autonomously deriving three dimensional models of urban and residential buildings from raw LIDAR data. First, a greedy insertion triangulation algorithm, modified with a proposed noise filtering technique, triangulates the raw LIDAR data. The normal vectors of those triangles are then passed to an unsupervised clustering algorithm – Fuzzy Simplified Adaptive Resonance Theory (Fuzzy SART). Fuzzy SART returns a rough grouping of coplanar triangles. A proposed multiple regression algorithm then further refines the coplanar grouping by further removing outliers and deriving an improved planar segmentation of the raw LIDAR data. Finally, further refinement is achieved by calculating the intersection of the best fit roof planes and moving nearby points close to that intersection to exist at the intersection, resulting in straight roof ridges. The end result of the aforementioned techniques culminates in a well defined model approximating the considered building depicted by the LIDAR data.
Show less - Date Issued
- 2006
- Identifier
- CFE0001315, ucf:47017
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001315
- Title
- "SET A LIGHT IN A DARK PLACE": TEACHERS OF FREEDMEN IN FLORIDA, 1863-1874.
- Creator
-
Wakefield, Laura, Adams, Sean, University of Central Florida
- Abstract / Description
-
As the Civil War closed and Reconstruction began, a small army of teachers arrived in Florida. Under the auspices of northern aid societies, churches, and educational associations, they proposed to educate the newly emancipated slaves, believing that education would prepare African Americans for citizenship. Teachers found Florida's freedmen determined to acquire literacy by whatever means they could, but they faced a white populace resistant to outsiders. Reformers, politicians, literate...
Show moreAs the Civil War closed and Reconstruction began, a small army of teachers arrived in Florida. Under the auspices of northern aid societies, churches, and educational associations, they proposed to educate the newly emancipated slaves, believing that education would prepare African Americans for citizenship. Teachers found Florida's freedmen determined to acquire literacy by whatever means they could, but they faced a white populace resistant to outsiders. Reformers, politicians, literate blacks, and Yankee businessmen intent on socially, politically, and economically transforming Florida joined educators in reconstructing Florida. Florida's educational system transformed during Reconstruction, and an examination of the reciprocity between Reconstruction-era teachers and Florida's freedmen provides a window into how Florida's learning community changed. Teachers exerted a profound influence on Florida's freedmen and on the development of Florida's educational system. But it was not simply a matter of outsiders transforming freedmen. While previous writers have emphasized the teachers' limitations, conservatism, or sacrifice, this study examines the complex interplay, and at times mutual dependence, between northern reformers and freedmen. Teachers partnered with Florida's black community, which was determined to seize education by whatever means available; they joined with the state's white community, struggling to come to terms with radical social changes; and they worked with Yankee strangers, who saw education of freedmen as an opportunity to transform the state politically. The reciprocal process of social change created a new politically charged educational system in Florida.
Show less - Date Issued
- 2004
- Identifier
- CFE0000199, ucf:46164
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000199
- Title
- CONTRIBUTIONS TO AUTOMATIC PARTICLE IDENTIFICATION IN ELECTRON MICROGRAPHS: ALGORITHMS, IMPLEMENTATION, AND APPLICATIONS.
- Creator
-
Singh, Vivek, Marinescu, Dan, University of Central Florida
- Abstract / Description
-
Three dimensional reconstruction of large macromolecules like viruses at resolutions below 8 \AA~ - 10 \AA~ requires a large set of projection images and the particle identification step becomes a bottleneck. Several automatic and semi-automatic particle detection algorithms have been developed along the years. We present a general technique designed to automatically identify the projection images of particles. The method utilizes Markov random field modelling of the projected images and...
Show moreThree dimensional reconstruction of large macromolecules like viruses at resolutions below 8 \AA~ - 10 \AA~ requires a large set of projection images and the particle identification step becomes a bottleneck. Several automatic and semi-automatic particle detection algorithms have been developed along the years. We present a general technique designed to automatically identify the projection images of particles. The method utilizes Markov random field modelling of the projected images and involves a preprocessing of electron micrographs followed by image segmentation and post processing for boxing of the particle projections. Due to the typically extensive computational requirements for extracting hundreds of thousands of particle projections, parallel processing becomes essential. We present parallel algorithms and load balancing schemes for our algorithms. The lack of a standard benchmark for relative performance analysis of particle identification algorithms has prompted us to develop a benchmark suite. Further, we present a collection of metrics for the relative performance analysis of particle identification algorithms on the micrograph images in the suite, and discuss the design of the benchmark suite.
Show less - Date Issued
- 2005
- Identifier
- CFE0000705, ucf:46610
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0000705
- Title
- FEEDING THE CHILDREN: A PALEODIETARY RECONSTRUCTION OF JUVENILES FROM KUELAP, PERU.
- Creator
-
Denierio, Marley, Toyne, J. Marla, University of Central Florida
- Abstract / Description
-
Before reaching adulthood, every individual experiences a period of dependency, the juvenile period, during which they rely on the older, more experienced members of their society for their security, subsistence and care. This juvenile period is an important stage of life for human physical and physiological development. In bioarchaeology, there has been limited research conducted on juveniles, particularly, the development of their own social identity and influences. The research method of...
Show moreBefore reaching adulthood, every individual experiences a period of dependency, the juvenile period, during which they rely on the older, more experienced members of their society for their security, subsistence and care. This juvenile period is an important stage of life for human physical and physiological development. In bioarchaeology, there has been limited research conducted on juveniles, particularly, the development of their own social identity and influences. The research method of stable carbon (C) and nitrogen (N) isotope analysis is used to reconstruct the paleodiet of juveniles to determine their dietary composition. Specifically, this research is focused on Kuelap, located in the highlands of Peru, a large settlement inhabited from 900-1535 AD, including pre-Inca (900-1469 AD) and Inca periods (1470-1535 AD). The primary aim of this research is to determine if juveniles consumed different foods through different time periods. Another aim of this research is to determine if juveniles were treated differently than their adult counterparts. Bone collagen samples, primarily ribs, from 32 juveniles were analyzed. The average ?13C value for the pre-Inca juveniles was -13.1%, and -13.4% for the Inca period juveniles. There was no statistically significant difference in ?13C values between juvenile groups or between adult and juvenile subsamples. The average ?15N for the pre-Inca juveniles was +8.1% and +7.8% for the Inca period juveniles. The Mann-Whitney U test determined there was not a statistically significant difference in ?15N values between the juvenile burial groups; however, there was a statistically significant difference between the juvenile and adult subgroups. The findings suggest that there may have been preferential treatment toward or metabolic stressors on the juvenile. The results of this study offer insights to availability of dietary components, societal roles based on developmental age stages, and the potential role of parenting in Kuelap.
Show less - Date Issued
- 2018
- Identifier
- CFH2000415, ucf:45758
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH2000415
- Title
- THE IMPACT OF TRAINING ON EYEWITNESS MEMORY.
- Creator
-
Nelson, Breanna, Whitten, Shannon, University of Central Florida
- Abstract / Description
-
In a large body of research, Elizabeth Loftus (1975) first illuminated major concerns about the inaccuracy of eyewitness accounts. The primary goal of the present research was to test whether training regarding common eyewitness mistakes and witness suggestibility could improve eyewitness accuracy. The experimental group watched a presentation on research conducted by Elizabeth Loftus (1975) on eyewitness testimony and suggestibility during a Psychology course. Afterwards, an actor...
Show moreIn a large body of research, Elizabeth Loftus (1975) first illuminated major concerns about the inaccuracy of eyewitness accounts. The primary goal of the present research was to test whether training regarding common eyewitness mistakes and witness suggestibility could improve eyewitness accuracy. The experimental group watched a presentation on research conducted by Elizabeth Loftus (1975) on eyewitness testimony and suggestibility during a Psychology course. Afterwards, an actor interrupted the classroom and had a discussion with the teacher. Students were asked a series of questions about the disruption. Some of the questions were leading and suggested certain things about the disruption that were inaccurate. After the misleading questions were asked, students were instructed to write a brief summary of what they saw. One week later, the students were asked direct questions about the disruption. A control group did not receive the presentation on eyewitness testimony, but witnessed the exact same event as the experimental group and followed the same procedure. The results suggest that participants who were trained were not as influenced as participants in the control group. Additionally, students in the control group reported the actor's behavior as more threatening than did the experimental group. This research not only adds to the existing literature, but has the potential to improve current eyewitness identification procedures in order to strengthen our justice system.
Show less - Date Issued
- 2013
- Identifier
- CFH0004379, ucf:45023
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFH0004379
- Title
- The road ahead to victory and lasting peace.
- Creator
-
Browder, Earl
- Date Issued
- 1944
- Identifier
- 2659977, CFDT2659977, ucf:4967
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/FCLA/DT/2659977
- Title
- The thugs of Europe.
- Creator
-
Norden, Albert
- Date Issued
- 1942
- Identifier
- 370505, CFDT370505, ucf:5505
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/FCLA/DT/370505
- Title
- EFFICIENT CONE BEAM RECONSTRUCTION FOR THE DISTORTED CIRCLE AND LINE TRAJECTORY.
- Creator
-
Konate, Souleymane, Katsevich, Alexander, University of Central Florida
- Abstract / Description
-
We propose an exact filtered backprojection algorithm for inversion of the cone beam data in the case when the trajectory is composed of a distorted circle and a line segment. The length of the scan is determined by the region of interest , and it is independent of the size of the object. With few geometric restrictions on the curve, we show that we have an exact reconstruction. Numerical experiments demonstrate good image quality.
- Date Issued
- 2009
- Identifier
- CFE0002530, ucf:47669
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002530
- Title
- The Mothers: An Exploration of Memory and Secondary Knowledge.
- Creator
-
Battle, Taylor, Raimundi-Ortiz, Wanda, Harris, Christopher, Price, Mark, University of Central Florida
- Abstract / Description
-
I consider the experiences of past generations of women in my family and my relationship to them. This body of work began with Bessie, a portrait of my father's mother. I painted it after attending her funeral. I did not have a meaningful relationship with either of my grandmothers. This led me to consider my right to portray them. My need to admit my incomplete memory and avoid the objectification of my subjects caused me to question my perspective. I wanted to memorialize these women to...
Show moreI consider the experiences of past generations of women in my family and my relationship to them. This body of work began with Bessie, a portrait of my father's mother. I painted it after attending her funeral. I did not have a meaningful relationship with either of my grandmothers. This led me to consider my right to portray them. My need to admit my incomplete memory and avoid the objectification of my subjects caused me to question my perspective. I wanted to memorialize these women to avoid their erasure. Through the progressive abstraction of these women's figures, I chase an honest representation of my understanding.
Show less - Date Issued
- 2016
- Identifier
- CFE0006072, ucf:50947
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006072
- Title
- Sampling and Reconstruction of Spatial Signals.
- Creator
-
Cheng, Cheng, Li, Xin, Sun, Qiyu, Yong, Jiongmin, Liu, Zhe, Xu, Mengyu, University of Central Florida
- Abstract / Description
-
Digital processing of signals f may start from sampling on a discrete set ?, f ?? f(?_n), ?_n ??.The sampling theory is one of the most basic and fascinating topics in applied mathematics and in engineering sciences. The most well known form is the uniform sampling theorem for band-limited/wavelet signals, that gives a framework for converting analog signals into sequences of numbers. Over the past decade, the sampling theory has undergone a strong revival and the standard sampling paradigm...
Show moreDigital processing of signals f may start from sampling on a discrete set ?, f ?? f(?_n), ?_n ??.The sampling theory is one of the most basic and fascinating topics in applied mathematics and in engineering sciences. The most well known form is the uniform sampling theorem for band-limited/wavelet signals, that gives a framework for converting analog signals into sequences of numbers. Over the past decade, the sampling theory has undergone a strong revival and the standard sampling paradigm is extended to non-bandlimited signals including signals in reproducing kernel spaces (RKSs), signals with finite rate of innovation (FRI) and sparse signals, and to nontraditional sampling methods, such as phaseless sampling.In this dissertation, we first consider the sampling and Galerkin reconstruction in a reproducing kernel space. The fidelity measure of perceptual signals, such as acoustic and visual signals, might not be well measured by least squares. In the first part of this dissertation, we introduce a fidelity measure depending on a given sampling scheme and propose a Galerkin method in Banach space setting for signal reconstruction. We show that the proposed Galerkin method provides a quasi-optimal approximation, and the corresponding Galerkin equations could be solved by an iterative approximation-projection algorithm in a reproducing kernel subspace of Lp.A spatially distributed network contains a large amount of agents with limited sensing, data processing, and communication capabilities. Recent technological advances have opened up possibilities to deploy spatially distributed networks for signal sampling and reconstruction. We introduce a graph structure for a distributed sampling and reconstruction system by coupling agents in a spatially distributed network with innovative positions of signals. We split a distributed sampling and reconstruction system into a family of overlapping smaller subsystems, and we show that the stability of the sensing matrix holds if and only if its quasi-restrictions to those subsystems have l_2 uniform stability. This new stability criterion could be pivotal for the design of a robust distributed sampling and reconstruction system against supplement, replacement and impairment of agents, as we only need to check the uniform stability of affected subsystems. We also propose an exponentially convergent distributed algorithm for signal reconstruction, that provides a suboptimal approximation to the original signal in the presence of bounded sampling noises.Phase retrieval (Phaseless Sampling and Reconstruction) arises in various fields of science and engineering. It consists of reconstructing a signal of interest from its magnitude measurements. Sampling in shift-invariant spaces is a realistic model for signals with smooth spectrum. We consider phaseless sampling and reconstruction of real-valued signals in a shift-invariant space from their magnitude measurements on the whole Euclidean space and from their phaseless samples taken on a discrete set with finite sampling density. We find an equivalence between nonseparability of signals in a shift-invariant space and their phase retrievability with phaseless samples taken on the whole Euclidean space. We also introduce an undirected graph to a signal and use connectivity of the graph to characterize the nonseparability of high-dimensional signals. Under the local complement property assumption on a shift-invariant space, we find a discrete set with finite sampling density such that signals in shift-invariant spaces, that are determined by their magnitude measurements on the whole Euclidean space, can be reconstructed in a stable way from their phaseless samples taken on that discrete set. We also propose a reconstruction algorithm which provides a suboptimal approximation to the original signal when its noisy phaseless samples are available only.
Show less - Date Issued
- 2017
- Identifier
- CFE0006726, ucf:51889
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0006726
- Title
- Dictionary Learning for Image Analysis.
- Creator
-
Khan, Muhammad Nazar, Tappen, Marshall, Foroosh, Hassan, Stanley, Kenneth, Li, Xin, University of Central Florida
- Abstract / Description
-
In this thesis, we investigate the use of dictionary learning for discriminative tasks on natural images. Our contributions can be summarized as follows:1) We introduce discriminative deviation based learning to achieve principled handling of the reconstruction-discrimination tradeoff that is inherent to discriminative dictionary learning.2) Since natural images obey a strong smoothness prior, we show how spatial smoothness constraints can be incorporated into the learning formulation by...
Show moreIn this thesis, we investigate the use of dictionary learning for discriminative tasks on natural images. Our contributions can be summarized as follows:1) We introduce discriminative deviation based learning to achieve principled handling of the reconstruction-discrimination tradeoff that is inherent to discriminative dictionary learning.2) Since natural images obey a strong smoothness prior, we show how spatial smoothness constraints can be incorporated into the learning formulation by embedding dictionary learning into Conditional Random Field (CRF) learning. We demonstrate that such smoothness constraints can lead to state-of-the-art performance for pixel-classification tasks.3) Finally, we lay down the foundations of super-latent learning. By treating sparse codes on a CRF as latent variables, dictionary learning can also be performed via the Latent (Structural) SVM formulation for jointly learning a classifier over the sparse codes. The dictionary is treated as a super-latent variable that generates the latent variables.
Show less - Date Issued
- 2013
- Identifier
- CFE0004701, ucf:49844
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0004701
- Title
- Recollections: An Internal Analysis of Memory and Perception.
- Creator
-
Jimenez, Samuel, Kovach, Keith, Price, Mark, Raimundi-Ortiz, Wanda, Poindexter, Carla, University of Central Florida
- Abstract / Description
-
I investigate the depths of memory, the entanglement of personal recollections withcommunal knowledge (learned semantic information from media and society such as facts and social norms) and the changing perceptions of environments over time. Memories define us. Throughout life we are exposed to vast quantities of imagery through a variety of media and personal experiences. Over time our firsthand experiences and what we witness in film, print, photography, and the internet become...
Show moreI investigate the depths of memory, the entanglement of personal recollections withcommunal knowledge (learned semantic information from media and society such as facts and social norms) and the changing perceptions of environments over time. Memories define us. Throughout life we are exposed to vast quantities of imagery through a variety of media and personal experiences. Over time our firsthand experiences and what we witness in film, print, photography, and the internet become indistinguishable in our memory.My work recreates consequential scenes from my past through technical drawings and blended imagery while exploring the possibilities provided by the interaction of common knowledge and the ambiguous nature of memory.
Show less - Date Issued
- 2014
- Identifier
- CFE0005188, ucf:50623
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0005188
- Title
- ELECTRICAL CAPACITANCE VOLUME TOMOGRAPHY OF HIGH CONTRAST DIELECTRICS USING A CUBOID GEOMETRY.
- Creator
-
Nurge, Mark, Schelling, Patrick, University of Central Florida
- Abstract / Description
-
An Electrical Capacitance Volume Tomography system has been created for use with a new image reconstruction algorithm capable of imaging high contrast dielectric distributions. The electrode geometry consists of two 4 x 4 parallel planes of copper conductors connected through custom built switch electronics to a commercially available capacitance to digital converter. Typical electrical capacitance tomography (ECT) systems rely solely on mutual capacitance readings to reconstruct images of...
Show moreAn Electrical Capacitance Volume Tomography system has been created for use with a new image reconstruction algorithm capable of imaging high contrast dielectric distributions. The electrode geometry consists of two 4 x 4 parallel planes of copper conductors connected through custom built switch electronics to a commercially available capacitance to digital converter. Typical electrical capacitance tomography (ECT) systems rely solely on mutual capacitance readings to reconstruct images of dielectric distributions. This dissertation presents a method of reconstructing images of high contrast dielectric materials using only the self capacitance measurements. By constraining the unknown dielectric material to one of two values, the inverse problem is no longer ill-determined. Resolution becomes limited only by the accuracy and resolution of the measurement circuitry. Images were reconstructed using this method with both synthetic and real data acquired using an aluminum structure inserted at different positions within the sensing region. Comparisons with standard two dimensional ECT systems highlight the capabilities and limitations of the electronics and reconstruction algorithm.
Show less - Date Issued
- 2007
- Identifier
- CFE0001591, ucf:47119
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0001591
- Title
- UNSUPERVISED BUILDING DETECTION FROM IRREGULARLY SPACED LIDAR AND AERIAL IMAGERY.
- Creator
-
Shorter, Nicholas, Kasparis, Takis, University of Central Florida
- Abstract / Description
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As more data sources containing 3-D information are becoming available, an increased interest in 3-D imaging has emerged. Among these is the 3-D reconstruction of buildings and other man-made structures. A necessary preprocessing step is the detection and isolation of individual buildings that subsequently can be reconstructed in 3-D using various methodologies. Applications for both building detection and reconstruction have commercial use for urban planning, network planning for mobile...
Show moreAs more data sources containing 3-D information are becoming available, an increased interest in 3-D imaging has emerged. Among these is the 3-D reconstruction of buildings and other man-made structures. A necessary preprocessing step is the detection and isolation of individual buildings that subsequently can be reconstructed in 3-D using various methodologies. Applications for both building detection and reconstruction have commercial use for urban planning, network planning for mobile communication (cell phone tower placement), spatial analysis of air pollution and noise nuisances, microclimate investigations, geographical information systems, security services and change detection from areas affected by natural disasters. Building detection and reconstruction are also used in the military for automatic target recognition and in entertainment for virtual tourism. Previously proposed building detection and reconstruction algorithms solely utilized aerial imagery. With the advent of Light Detection and Ranging (LiDAR) systems providing elevation data, current algorithms explore using captured LiDAR data as an additional feasible source of information. Additional sources of information can lead to automating techniques (alleviating their need for manual user intervention) as well as increasing their capabilities and accuracy. Several building detection approaches surveyed in the open literature have fundamental weaknesses that hinder their use; such as requiring multiple data sets from different sensors, mandating certain operations to be carried out manually, and limited functionality to only being able to detect certain types of buildings. In this work, a building detection system is proposed and implemented which strives to overcome the limitations seen in existing techniques. The developed framework is flexible in that it can perform building detection from just LiDAR data (first or last return), or just nadir, color aerial imagery. If data from both LiDAR and aerial imagery are available, then the algorithm will use them both for improved accuracy. Additionally, the proposed approach does not employ severely limiting assumptions thus enabling the end user to apply the approach to a wider variety of different building types. The proposed approach is extensively tested using real data sets and it is also compared with other existing techniques. Experimental results are presented.
Show less - Date Issued
- 2009
- Identifier
- CFE0002783, ucf:48125
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0002783
- Title
- THE NORTH COMES SOUTH: NORTHERN METHODISTS IN FLORIDA DURING RECONSTRUCTION.
- Creator
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Bollinger, Heather, Cassanello, Robert, University of Central Florida
- Abstract / Description
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This thesis examines three groups of northern Methodists who made their way to north Florida during Reconstruction: northern white male Methodists, northern white female Methodists, and northern black male and female Methodists. It analyzes the ways in which these men and women confronted the differences they encountered in Florida's southern society as compared to their experiences living in a northern society. School catalogs, school reports, letters, and newspapers highlight the ways in...
Show moreThis thesis examines three groups of northern Methodists who made their way to north Florida during Reconstruction: northern white male Methodists, northern white female Methodists, and northern black male and female Methodists. It analyzes the ways in which these men and women confronted the differences they encountered in Florida's southern society as compared to their experiences living in a northern society. School catalogs, school reports, letters, and newspapers highlight the ways in which these northerners explained the culture and behaviors of southern freedmen and poor whites in Jacksonville, Gainesville, and Monticello. This study examines how these particular northern men and women present in Florida during Reconstruction applied elements of "the North" to their interactions with the freedmen and poor whites. Ultimately, it sheds light on northern Methodist middle class values in southern society.
Show less - Date Issued
- 2011
- Identifier
- CFE0003897, ucf:48723
- Format
- Document (PDF)
- PURL
- http://purl.flvc.org/ucf/fd/CFE0003897
