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 6 of 6 for “"ellipse-fitting"”.
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Stress relaxation of AZ31 alloy using high energy diffraction microscopy
… individual peak dynamics and reflection-wise ellipse-fitting strain time series. Peaks of crystallographic planes having a normal roughly parallel to the tensile axis are tracked and the relative plane distances calculated from radial displacements. Generally speaking, grains not favorably …
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Wire detection using ground penetrating radar using image processing techniques
… The second and third approaches propose an ellipse fitting technique to detect surface-laid and shallowly buried wires. After filtering and edge detection in the cross-section image, ellipse fitting is applied to obtain an ellipse feature for indicating how well the shape fits to an ellipse. …
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Implementation of a High-speed Sinusoidal Encoder Interpolation System
… gain and offset measurement errors based on ellipse-fitting techniques.
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Activity segmentation with special emphasis on sit-to-stand analysis
… of a human body in vowel space as well as ellipse fitting algorithms and image features to capture orientation of the body. Fuzzy clustering methods such as the Gustafson vessel algorithm are also investigated. The proposed algorithms were tested on 9 subjects with ages ranging from 18 to …
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Star formation in the bars of nearby galaxies
… location of the bar and its properties, we used ellipse fitting to identify the bar properties, including the bar size and the bar strength. We also use the host stellar mass of each galaxy measured from the 3.6μm integrated magnitudes from S⁴G to investigate how the three star formation …
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Non-contract Estimation of Respiration and Heartbeat Rate using Ultra-Wideband Signals
… mitigate these problems. Specifically, an ellipse-fitting algorithm is adopted to track and compensate the aperiodic large-scale body motion, and a wavelet-based filter is applied for attenuating the interference caused by respiratory harmonics to accurately estimate the heartbeat …