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 20 of 31 for “"boundary detection"”.
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Boundary detection in ultrasonic speckle
… as lines in ultrasound scans and approach the boundary detection problem as one of detecting lines of unknown orientation. We define a set of ""sticks,"" short line segments of variable orientation that can locally approximate the boundaries. Using the physical principles that account for the …
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Left ventricular boundary detection in digitized cardiac images
<p>Edge detecting techniques relative to application in a portion of Eastern Washington University's Heart Modeling System (HMS) are discussed. Filters, sharpeners, and transforms are discussed in more depth. Twelve operators, several with more than one mask, are tested to arrive at the optimal …
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Word boundary detection using landmarks : a survey of consonants
This project searches for consistent acoustic attributes in a broad set of American English consonants that would help in identifying their word positions in running speech. A database of sentences containing word pairs (e.g. "lay keys" vs. "lake ease" for /k/) of thirteen consonants (six stops, …
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Report on the fast boundary detection algorithm of Werner Frei and Chung-Ching Chen
Typescript (photocopy).
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A Frequency-Modulated Continuous Wave-Based Boundary Detection System in a Small PCB Profile
… unit. One part of this monitoring system is a boundary detection system used to verify that the monitoring system is not capturing events outside the monitoring region such as an event outside the house or in a neighboring room.</p> <p>The work presented in the paper, “A Frequency-Modulated …
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RF Front End for an Integrated Silhouette Capture and Boundary Detection Frequency Modulated Continuous Wave Ultra-Wideband Radar System for the Extension of Independent Living
… monitoring system is comprised of four blocks: boundary detection, silhouette capture, human identification, and data transmission. This paper develops the RF front end hardware for the silhouette capture subsystem.</p> <p>System requirements are derived for the silhouette capture subsystem. An …
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A Frequency-Modulated Continuous Wave-Based Boundary Detection System for Determination of Monitoring Region for an Indoor Ultra-Wideband Short Range Radar-Based Eldercare Monitoring System
… system can summon immediate aid by the automatic detection of fall events. The application of ultra-wideband (UWB) signals for a monitoring system was chosen due to its unique characteristics such as wide spectrum, immunity to interference, penetrability, and application for the detection of …
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Reconstructing neurons from serial section electron microscopy images
… of exploiting 3D context to further improve boundary detection accuracy despite the high anisotropy of ssEM images. In the following parts, we propose two techniques for training convolutional nets that can substantially improve boundary detection accuracy. First, we introduce novel forms of …
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Accumulator-based three dimensional building boundary reconstruction framework for satellite images
Three-Dimensional (3D) building boundary detection and reconstruction from satellite images has various applications in computer vision such as 3D city modelling, radio network planning, urban planning, mapping, and navigation. Traditionally, 3D building models have been produced from multiview …
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Advanced Image Processing Methods for Automated Quantitative Microstructural Analysis
… Previous attempts to automate the grain boundary detection process using standard image processing techniques required images that were highly optimized for these algorithms. This work seeks to improve previous results by using newer, advanced mathematical methods for image processing. …
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Towards efficient and scalable computer vision systems
… new online algorithm for automatic lane and road-boundary detection. The algorithm runs in real time and is adaptive and able to handle several challenging environmental conditions. Finally, we express the road-boundary detection algorithm using our stream algebra. We use it as a case study for …
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Cough endpoint detection in continuous audio recordings
Cough detection and monitoring plays an important role in the assessment of respiratory conditions in patients. Cough audio can also prove valuable information for models used in the classification and diagnosis of diseases. However, cough detection remains a challenging problem due to variables in …
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Image-based direct geo-referencing of farm boundaries for autonomous farming vehicles using computer vision
… farming vehicles, this approach allows for the detection and geo-referencing of farm boundaries at an acceptable level of accuracy in comparison to conventional satellite imagery. Upon completion of our research, a comprehensive framework is developed, ranging from the acquisition of images to …
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Robust curved road boundary identification using hierarchical clustering.
We develop a new method for automatic curved road boundary detection in images captured by traffic cameras. The proposed method combines data driven (edge segments) and model based (2nd degree polynomial models for road boundaries) techniques to identify dominant road boundary in images exhibiting …
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Surface reconstruction and display of left ventricular function for pet images
… image slices generated by PET. An automatic boundary detection algorithm outlines the object surface and assigns appropriate intensity values to the surface points. The surface is then rotated with the long axis of the heart in a vertical position, allowing the myocardium to be viewed from …
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System for rapid subtitling
… is widely practiced, traditional speech boundary detection algorithms have proven insufficient for adoption when subtitling audiovisual sequences. Human-edited timing of subtitles is a dull and laborious exercise, yet with some human-guidance, basic systems may accurately align …
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Communicative context, expectations, and adaptation in prosodic production and comprehension
… the processing of intonational boundaries. In a boundary detection task, we manipulated a) the strength of cues to the presence of a boundary and b) whether or not a location in the sentence was a plausible location for an intonational boundary to occur given the syntactic structure. In …
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Content-based Digital Video Processing. Digital Videos Segmentation, Retrieval and Interpretation.
… based video content analysis require shot boundary detection as the first step to divide video sequences into sections. Furthermore, with the advances in networking and computing capability, efficient retrieval of multimedia data has become an important issue. Content-based retrieval …
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Machine learning of image analysis with convolutional networks and topological constraints
… problems, and examples include image denoising, boundary detection, and motion estimation. Our approach is characterized by two main elements, both of which represent a departure from previous work. The first is a focus on convolutional networks, a machine learning strategy that operates directly …
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