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 104 for “"shape analysis"”.
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Shape Analysis in Bioinformatics
… a property often overlooked in protein image analysis. To complete this line of research we provide a method to rank points that are likely to be present in one group of images but absent in a second group. The produced score is used to highlight the proteins that are not present in both image …
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Shape Analysis Using Spectral Geometry
<p>Shape analysis is a fundamental research topic in computer graphics and computer vision. To date, more and more 3D data is produced by those advanced acquisition capture devices, e.g., laser scanners, depth cameras, and CT/MRI scanners. The increasing data demands advanced analysis tools …
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Shape analysis in shape space
… to classify different deformations based on the shape space concept. A shape space is a quotient space in which each point corresponds to a class of shapes. The shapes of each class are transformed to each other by a transformation group preserving a geometrical property in which we are …
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Measurement Error Models in Shape Analysis
… deals with the problem of measurement error in shape analysis, especially in the Procrustes matching of shapes. Shape data are often prone to measurement error due to the wide sources of errors. In traditional shape analysis measurement error is usually not considered, but ignoring measurement …
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Dominant points detection for shape analysis
… can be extracted from them and the contour analysis offers a lower computational complexity also. The contour analysis can be restricted to the study of some salient points with high curvature from which it is possible to reconstruct the original contour. The thesis is focused on the …
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Geometric techniques for molecular shape analysis
… biological functions. The idea of molecular shape and shape complementarity play crucial roles in protein folding, conformational stability, molecular solubility, crystal packing, and docking. Various models based on a union of balls representation have been suggested for representing …
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Statistical shape analysis of anatomical structures
… framework for image-based statistical analysis of anatomical shape in different populations. Applications of such analysis include understanding developmental and anatomical aspects of disorders when comparing patients vs. normal controls, studying morphological changes caused by aging, …
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Statistical Shape Analysis for the Human Back
… Procrustes and Euclidean distance matrix analysis (EDMA) have been investigated for analysing the three-dimensional shape and form of the human back. Procrustes analysis is used to distinguish deformed backs from normal backs. EDMA is used to locate the changes occurring on the back …
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Stress and shape analysis of a paraglider wing
… payload with respect to the wing. The deflected shape of the sail depends on the pressure distribution over the sail; the pressure distribution in turn depends aerodynamically on the deflected shape of the sail. It is the purpose of this thesis to derive the equilibrium equations for the sail and …
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Automated shape analysis and visualization of the human back.
… the deformity is to base the assessment on the shape of back surface. Though three-dimensional data acquisition methods exist, techniques to extract relevant information for clinical use have not been widely developed. Thi's thesis presentsthe content and progression of research into automated …
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Nonparametric statistical methods for image segmentation and shape analysis
… either about the image intensities or about the shapes of the objects to be segmented. To this end, we use nonparametric statistical methods for modeling both the intensity distributions and the shape distributions. Previous work on active contour-based segmentation considered the class of images …
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A size and shape analysis in obstructive sleep apnea patients
… studies on the disease usually require the analysis of many variables. This makes it difficult to obtain an adequate sample size. Further, the size of the upper airway structure often overwhelms the data matrix, and thus may be a source of multicollinearity or noise. More seriously, the …
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A statistical shape analysis of the neurocranium and long bones
… often fail to sufficiently capture the "true" shape of features, thus also failing to identify potentially important feature characteristics. The development of geometric morphometrics has allowed more comprehensive and accurate three-dimensional data capture which maintains the geometric …
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Steklov geometry processing : an extrinsic approach to spectral shape analysis
… Laplacian for spectral geometry processing and shape analysis. Intrinsic approaches, usually based on the Laplace-Beltrami operator, cannot capture the spatial embedding of a shape up to rigid motion, and many previous extrinsic methods lack theoretical justification. Instead, we consider the …
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Shape analysis for digital representation of East Asian silk patterns
… in Korea and China. Through a comparative analysis, I identify that the pattern is a shared heritage of the region and proses that more holistic approach is required to understand its relation with geometric patterns from other cultures. One of the approach is symmetry analysis, a method …
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Multi-scale and multi-spectral shape analysis: from 2d to 3d
<p>Shape analysis is a fundamental aspect of many problems in computer graphics and computer vision, including shape matching, shape registration, object recognition and classification. Since the SIFT achieves excellent matching results in 2D image domain, it inspires us to convert the 3D shape …
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A shape analysis approach to prediction of bone stiffness using FEXI
… the spatial distribution of bone. Finite element analysis can be performed in both two and three dimensions, and predicts the deformation or induced stress when a load is applied to a structure (such as a bone) of defined material composition and shape. The simulation of a mechanical compression …
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An image processing based system for three dimensional sail shape analysis
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1991.
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Statistical shape analysis of neuroanatomical structures based on spherical wavelet transformation
… in vivo. Previous work in studying the shape variations of brain structures has provided additional localized information compared with traditional volume-based study. However, challenges remain in finding an accurate shape presentation and conducting shape analysis with sound …
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