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 37 for “"unwrapping"”.
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A Study of 2-D Phase Unwrapping
Finally, multibaseline phase unwrapping for InSAR processing is discussed. An MAP approach is proposed to overcome the drawbacks of the conventional maximum likelihood (ML) approach. The optimal choice of baselines is derived.
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Unwrapping the wings of the television show The West Wing
My thesis project is a textual analysis of the television show The West Wing using John Fiske’s narrative analysis approach and Douglas Kellner’s multicultural and multiperspectival critical cultural theory. My initial venture into the show was more a chance to get away from commonplace television …
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Realistic Tactile Stylization for Digital Fabrication using Enhanced UV Unwrapping Method
… Our research systematically evaluates various UV unwrapping methods, including alternative UV projections and an optimization-based neural UV mapping, to improve the realism and accuracy of texture application on 3D models in digital fabrication. Building on these findings, we will release a …
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Absolute distance contouring and a phase unwrapping algorithm for phase maps with discontinuities.
… absolute distance contouring, and a phase unwrapping algorithm for phase maps with discontinuities. Absolute distance contouring, which is based on the shadow moire method, using the rotation of a grating, is a technique which can be used for the measurement of absolute distance from the …
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Phase projection using three satellites
… Aperture Radar (InSAR) during the phase unwrapping process and the noise filtering step. In particular, as intuition would follow, we establish that the advantage of using three satellites over using just two in noise reduction means that using three satellites should be the way to go in …
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DEVELOPMENT OF PHASE RETRIEVAL TECHNIQUES IN DISPLACEMENT AND DISPLACEMENT DERIVATIVES MEASUREMENT
… genetic algorithm for two-dimensional phase unwrapping method, is also proposed for phase unwrapping of a noisy phase map. A method to determine material properties of a small cantilever beam using DSPI is also developed which overcomes the influence of rigid body movement in the out of plane …
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Algorithms for 3D time-of-flight imaging
… method for simultaneously performing phase unwrapping and denoising for sinusoidal amplitude modulated continuous wave ToF cameras using multiple frequencies. The first application uses several unfocused photodetectors with high time resolution to estimate information about features in the …
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Synthetic Aperture Radar Interferometry with 3 satellites
… which seeks to ease the reliance on phase unwrapping steps often necessary in retrieving height. It does so by expanding the wrapped phase range without performing any phase unwrapping, through the use of different wrapping speeds of the 3 sets of satellite pairings. The third method is the …
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An investigation of various computational techniques in optical fringe analysis.
… the process with Fourier Fringe Analysis (FFA). Unwrapping, or elimination of 21t discontinuities in a phase map, is treated in detail. Two novel unwrapping techniques are proposed, analysed and demonstrated. A new method to reduce the number of wraps in the resulting phase distribution is …
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Molecular mechanisms of pioneer factor ELF2 interactions with the nucleosome
… the TSS. The results indicate ELF2 is capable of unwrapping the nucleosome to increase DNA accessibility. By unwrapping the nucleosome by three helical turns, ELF2 binding to the nucleosome increases inter-nucleosome distance and could allow recruitment of chromatin remodellers. It is therefore …
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Topics in CT and SAR Imaging: Fast Back -Projection Algorithms and Optimal Antenna Spacings
… is motivated by the investigation of the phase unwrapping problem in 3-D SAR imaging. In this thesis, we study the optimal antenna spacings for pointwise terrain height estimation. In particular, we start from the maximum likelihood estimates of the terrain height. The ambiguous terrain height …
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Ascender : unfolding fantasies of control, power and collapse through expanded painting
… drawing, painting, and installation. This 'unwrapping' of ideologies and narratives of self, this 'unfolding', becomes itself a transcendent act through which the artist's overall vision is conveyed. It is the working through of ideas that becomes the essence of this artwork, whether it is a …
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Digital Holographic Micro-Interferometery for the Measurement of the Refractive Index of Biological Cells
… wrapped phase image and quality-guided phase unwrapping program were implemented in LabVIEW®. From the three different interference phase distributions of these holograms and the refractive index and its variation of the cell medium, four linearly independent phase difference equations, …
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Real-Time Detection of GPS Spoofing Attack with Hankel Matrix and Unwrapped Phase Angle Data
… We have demonstrated that, together with angle unwrapping algorithm, low-rank approximation of Hankel Matrix can help us separating GPS-spoofing attack with FDIA. The proposed method is verified with simulation result. It has been demonstrated that the GSA with 3 second time-shift creates a …
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Spatial Fringe Analysis Methods and their Application to Holographic Interferometry and Fringe Projection Techniques
… and avoids the necessity of using filtering and unwrapping procedures, multiple analysis techniques, and multiple interferometric configurations. Developing such a spatial fringe analysis method with the added advantage of having less computational complexity would open up avenues for making …
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The Development of Quasi-Optical Techniques for Log Wavelength Imaging
… to phase grating design. Several phase unwrapping techniques were also investigated in order to simplify manufacture of phase gratings with difficult-to-fabricate profiles. Results of experimental measurements from a number of test gratings are presented and verified using the Maynooth …
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Three-Dimensional Microscopy by Laser Scanning and Multi-Wavelength Digital Holography
… The method compares favorably to software unwrapping, as the technique does not produce non-existent phase steps. Curvature mismatch between the reference and object beams is numerically compensated. The 3D images of porous coal samples and SKOV-3 ovarian cancer cells are presented.
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Movements in Binaural Space: Issues in HRTF Interpolation and Reverberation, with applications to Computer Music
… A rigorous analysis of threshold based phase unwrapping is also performed. The results and conclusions drawn from these analyses motivate the development of two novel methods for HRTF representation and interpolation. Empirical data is used directly in a Phase Truncation method. A Functional …
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