Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 16 of 16 for “"Groundtruth"”.
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Groundtruth budgeting : a novel approach to semi-supervised relation extraction in medical language
… bootstrapping of a classifier for this task: Groundtruth Budgeting. In the case of highly-overlapping, self-similar datasets as is the case with the 2010 i2b2/VA challenge corpus, the performance of classifiers on the minority classes is often poor. To address this we set aside a random …
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Supporting and Transforming High-Stakes Investigations with Expert-Led Crowdsourcing
… crowdsourcing in two collaboration systems: GroundTruth and CuriOSINTy. GroundTruth is focused on one specific investigative task, image geolocation. CuriOSINTy expands the flexibility and scope of expert-led crowdsourcing to handle more complex and multiple investigative tasks: identifying …
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VirtualHome : learning to infer programs from synthetic videos of activities in the home
… of a large activity video dataset with rich groundtruth, enabling training and testing of video understanding models. Using the collected dataset, a sequence-to-sequence neural encoder-decoder model with visual attention is built, and learns to infer programs directly from videos. It achieves …
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Supporting Open Source Investigative Journalism with Crowdsourced Image Geolocation
… work. We produced a software prototype called GroundTruth which enables crowd workers to support investigative journalists in the geolocation of visual media quickly and accurately. Additionally, this work contributes experimental results demonstrating how the crowd can be utilized to support …
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Advancing 6DoF Object Pose Estimation: Keypoint Voting, Optimal Keypoint Sampling, and Bridging the Simulation-to-real Gap
… fully supervised methods, requiring no real groundtruth annotations. Together, these contributions advance 6DoF pose estimation in accuracy, efficiency, and adaptability across diverse datasets and scenarios.
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Extreme weather disaster resilient port and waterway infrastructure for sustainable global supply chain
… surfaces using Landsat-8 satellite imagery. Groundtruth samples of the Landsat-8 pansharpened multispectral satellite imageries from six selected sites were sampled and used to develop the Landsat-8 Built-up Area and Natural Surface (L-BANS) auto-classification methodology. The L-BANS surface …
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Pedestrian detection and tracking using stereo vision techniques
… techniques are evaluated using both 2D and 3D groundtruth methodologies.
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Combining Probabilistic Shape-from-Shading & Statistical Facial Shape Models
… to calculate the error di�fference between the groundtruth and recovered normals and surface heights. The results of experiments in this thesis have shown improvements in probabilistic shape-from-shading when statistical shape models are used
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Learning image segmentation and hierarchies by learning ultrametric distances
… few have parameters that can be optimized using groundtruth data to extract maximum performance on a specialized dataset. In this thesis, I present the first machine learning method to directly minimize an image segmentation error. It is based the theory of ultrametric distances and hierarchical …
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Remote Sensing of Cyanobacteria in Case II Waters Using Optically Active Pigments, Chlorophyll a and Phycocyanin
… ASD Fieldspec (UV/VNIR) spectroradiometers. Groundtruth samples were analyzed for in-vitro pigment concentrations and other physical and chemical water quality parameters. Empirical algorithms by Gitelson et al. (1986, 1994), Mittenzwey et al. (1991), Dekker (1993), and Schalles et al. …
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Accurate, fast, and robust 3D city-scale reconstruction using wide area motion imagery
… recall, and F-score using real-world LiDAR groundtruth data. Last but not least, this dissertation work proposes an automatic workflow, which can stitch multiple point cloud models with limited overlapping areas into one larger 3D model for better geographical coverage. All the results …
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Inferring Undirected and Causally Directed Graph Structures from Multivariate Time Series
… physiological connectivity is used as the groundtruth. The maps obtained by the graph inference and the traditional method of spectral coherence are compared with the CEP map. The results show that the proposed method provides a description of cortical connectivity that is more similar to …
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Evaluating the influence of machine-specific DRR parameters on the accuracy of X-ray simulation and orthopaedic 2D-3D reconstruction
… were then measured through comparison to a groundtruth X-ray image of an object with known geometry and density. The results demonstrated a 2D Dice overlap error of 0.4% for every 1 cm with which the S2O distance was offset, and a pixel intensity error of 1% for every 0.1 point offset of the …
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Mapping and assessing ecosystem threat status of South African kelp forests
… mapping and assessment; improve pressure data, groundtruth ecosystem condition, and assess the disruption of biotic processes. In line with the protocols of the IUCN RLE, South African kelp forest ecosystem types appear threatened with plausible results ranging between Vulnerable and Endangered. …
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Integrated Predictive Modeling and Analytics for Crisis Management
… analytical framework, EAGLE (Enhancing Airline Groundtruth Labels and Review rating prediction), which utilizes Large Language Models (LLMs) to improve the accuracy and objectivity of customer sentiment analysis in strategic airline route planning. EAGLE leverages LLMs for zero-shot …
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Black Genius: An Achievement Distortion
… a questionnaire, and document analyses. “Groundtruthing” (Pérez Huber et al., 2018) was also used to verify the data with 23 Black educators. Findings revealed a lack of any strong correlation between the state standardized test to other, more meaningful outcomes for Black students. The …