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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 51 to 60 of 75 (0.032 seconds)| 51 |
Computer-Vision-basierte Tracking- und Kalibrierungsverfahren für Augmented RealityStricker, Didier. Unknown Date (has links)
Techn. Universiẗat, Diss., 2002--Darmstadt.
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Exploring the mathematics that children read in the world: A case study of Grade 8 learners in a South African SchoolMokotedi, Lesego Brenda 07 May 2012 (has links)
This paper presents a qualitative study in which an attempt was made to extend the debate surrounding the use of real life contexts to make mathematics more meaningful and real. The study investigated Grade 8 learners’ knowledge of number, understanding of number concepts and the kinds of connections they make between number and the context in which number is used. An important aspect of the study’s methodological approach involved an examination of the comments that learners made about what they said they know about number. A response to the question: “Why is the number in the picture?” provided a framework for establishing how learners saw relationships between number and the context in which numbers are used. A face scenario with four questions was given to learners to elicit these relationships. Results pointed to the usefulness of real life contexts as tools that have a central role in uncovering what learners know about number and how they use that knowledge to understand situations that call for proficiency in mathematics.
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Der Einsatz unbemannter Flugsysteme zur Charakterisierung von gesprengtem HaufwerkTscharf, Alexander, Mostegel, Christian, Gaich, Andreas, Mayer, Gerhard, Fraundorfer, Friedrich, Bischof, Horst 28 September 2017 (has links)
Die erreichte Zerkleinerung und die Form des Haufwerks sind die beiden wichtigsten Ergebnisse einer Tagebausprengung. Schnelle Informationen über die Eigenschaften des gesprengten Haufwerks ermöglichen eine zielgerichtete und effiziente Produktionsplanung und Kenntnisse über die erreichte Zerkleinerung ermöglichen außerdem Anpassungen in der weiteren Zerkleinerungskette. Durch den Einsatz von UAVs (unmanned aerial vehicles) gemeinsam mit modernen Algorithmen aus dem Bereich Computer Vision und des maschinellen Lernens soll eine schnelle Erfassung und Interpretation der Daten bei gleichzeitiger Integration in die herkömmlichen betrieblichen Abläufe ermöglicht werden, und außerdem können Schwächen bodengebundener Systeme hinsichtlich Vollständigkeit
und Repräsentativität umgangen werden. Im vorliegenden Beitrag wird einerseits auf den relevanten Stand des Wissens und der Technik eingegangen und andererseits wird die verfolgte Stoßrichtung bei der Systementwicklung dargelegt sowie erste Arbeiten präsentiert. / The fragmentation and the shape of the muck pile are the two major outcomes of open pit mine and quarry blasts. Fast information about the muck pile properties will help to improve the production scheduling and furthermore this information could be used to optimize the blasting patterns of future production blasts. The combined use of unmanned aerial vehicles (UAVs) and modern machine learning and computer vision systems offers a new way of acquiring spatial data to determine on-site fragment size distribution, while at the same time enabling integration into common work flows and mitigating the weaknesses of ground-based systems with special regard to completeness and representativeness. In the present paper, we will discuss the relevant related work, present the planned path for system development and give examples of first work.
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Towards Dense Visual SLAMPietzsch, Tobias 05 December 2011 (has links) (PDF)
Visual Simultaneous Localisation and Mapping (SLAM) is concerned with simultaneously estimating the pose of a camera and a map of the environment from a sequence of images. Traditionally, sparse maps comprising isolated point features have been employed, which facilitate robust localisation but are not well suited to advanced applications. In this thesis, we present map representations that allow a more dense description of the environment. In one approach, planar features are used to represent textured planar surfaces in the scene. This model is applied within a visual SLAM framework based on the Extended Kalman Filter. We presents solutions to several challenges which arise from this approach.
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Towards Dense Visual SLAMPietzsch, Tobias 07 June 2011 (has links)
Visual Simultaneous Localisation and Mapping (SLAM) is concerned with simultaneously estimating the pose of a camera and a map of the environment from a sequence of images. Traditionally, sparse maps comprising isolated point features have been employed, which facilitate robust localisation but are not well suited to advanced applications. In this thesis, we present map representations that allow a more dense description of the environment. In one approach, planar features are used to represent textured planar surfaces in the scene. This model is applied within a visual SLAM framework based on the Extended Kalman Filter. We presents solutions to several challenges which arise from this approach.
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Untersuchungen des visuellen Kortex zum Mechanismus der visuellen Fusion mittels funktioneller Magnetresonanztomographie / Investigations of the visual cortex on the mechanism of visual fusion by functional magnetic resonance tomographySchmidt, Constanze 17 August 2011 (has links)
No description available.
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Compression of visual data into symbol-like descriptors in terms of a cognitive real-time vision system / Die Verdichtung der Videoeingabe in symbolische Deskriptoren im Rahmen des kognitiven EchtzeitvisionsystemsAbramov, Alexey 18 July 2012 (has links)
No description available.
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VOCUS a visual attention system for object detection and goal-directed search /Frintrop, Simone. January 1900 (has links)
Thesis (Ph.D.)--University of Bonn, Germany. / Includes bibliographical references and index.
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VOCUS : a visual attention system for object detection and goal-directed search /Frintrop, Simone. January 1900 (has links)
Thesis (Ph.D.)--University of Bonn, Germany. / Includes bibliographical references and index. Also issued online.
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Towards Efficient Convolutional Neural Architecture DesignRichter, Mats L. 10 May 2022 (has links)
The design and adjustment of convolutional neural network architectures is an opaque and mostly trial and error-driven process.
The main reason for this is the lack of proper paradigms beyond general conventions for the development of neural networks architectures and lacking effective insights into the models that can be propagated back to design decision.
In order for the task-specific design of deep learning solutions to become more efficient and goal-oriented, novel design strategies need to be developed that are founded on an understanding of convolutional neural network models.
This work develops tools for the analysis of the inference process in trained neural network models.
Based on these tools, characteristics of convolutional neural network models are identified that can be linked to inefficiencies in predictive and computational performance.
Based on these insights, this work presents methods for effectively diagnosing these design faults before and during training with little computational overhead.
These findings are empirically tested and demonstrated on architectures with sequential and multi-pathway structures, covering all the common types of convolutional neural network architectures used for classification.
Furthermore, this work proposes simple optimization strategies that allow for goal-oriented and informed adjustment of the neural architecture, opening the potential for a less trial-and-error-driven design process.
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