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.
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Showing 1 to 11 of 11 for “"Merkmalsextraktion"”.
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Single trial analyses of encephalogram data.
… liegt hierbei auf Methoden zur verbesserten Merkmalsextraktion, der Detektion mentaler Zustände und der Analyse der Variabilität von Reizantworten. Bedingte ereigniskorrelierte (De-)Synchronization: Die durch ein Ereignis induzierte Leistungsschwankung in einem Frequenzband wird konventionell …
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Entwicklung eines Systems zur dreidimensionalen Particle Tracking Velocimetry mit Genauigkeitsuntersuchungen und Anwendung bei Messungen in einem Wind-Wellen Kanal
… konnte durch einen neuen Algorithmus zur Merkmalsextraktion verbessert werden. Dabei konnten die Meßfehler auf die zugrundeliegende zweidimensionale Particle Tracking Velocimetry zurückgeführt werden. Abschließend wurde das Verfahren an Strömungsmessungen im Heidelberger Wind-Wellenkanal …
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Globale Bewegungsbeschreibung und Video-Mosaiking unter Verwendung parametrischer 2-D-Modelle, Schätzverfahren und Anwendungen
This dissertation deals with the description of global motion using parametric 2-D motion models and with the generation and application of video mosaics. The parametric 2-D motion models are derived, their properties are described and illustrated. In a new approach presented in this work an …
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Investigations on discriminative training criteria
In this work, a framework for efficient discriminative training and modeling is developed and implemented for both small and large vocabulary continuous speech recognition. Special attention will be directed to the comparison and formalization of varying discriminative training criteria and …
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Klassifikationsverfahren zur Materialerkennung : Grenzschichterkennung mittels laserinduzierter Fluoreszenz in mineralischen Lagerstätten am Beispiel der Braunkohlegewinnung
The analytical tool of the optical laser induced fluorescence (LIF) method offers the opportunity to recognize different materials and to detect boundaries. This study shows the methodology how to extract significant features from the fluorescence spectrum using systematic search algorithms. An …
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Nicht-intrusive Erkennung isolierter Gesten und Gebärden
Research in automatic gesture recognition is supposed to yield gesture-based human-machine interfaces and sign language translation systems. Using data gloves for capturing the hands or video cameras with markers attached to the user allows reliable separation of vocabulary sizes between 100 and …
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Quantile based histogram equalization for noise robust speech recognition
In many practical applications automatic speech recognition systems have to work in adverse acoustic environment conditions. Automatic systems are much more sensitive to the variabilities of the acoustic signal than humans. Whenever noise causes a mismatch between the distribution of the training …
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Acoustic feature combination for speech recognition
In this thesis, the use of multiple acoustic features of the speech signal is considered for speech recognition. The goals of this thesis are twofold: on the one hand, new acoustic features are developed, on the other hand, feature combination methods are investigated in order to find an effective …
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Modeling for part-based visual object detection based on local features
Today, automatic object detection in image data is usually performed using machine-learning approaches relying on a holistic object model and the sliding window principle. A major concern with holistic object detection is the insufficient tolerance to deformation, partial occlusion, and rotation. …
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Image retrieval, object recognition, and discriminative models
In this thesis, we present approaches to image retrieval, object recognition, and discriminative models. For image retrieval, we evaluate a large variety of different descriptors and answer the questions how descriptors can be combined and which descriptor should be chosen according to which …