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 20 for “"Deformable Model"”.
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A hybrid deformable model 3-D segmentation algorithm
Thesis (S.B. and M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1999.
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Probabilistic Multi-Compartment Deformable Model, Application to Cell Segmentation
… not perform well. The proposed method combines deformable models with a probabilistic framework in a simple graphical model such that it would capture the shape, structure and appearance of a cell. The process aims at the simultaneous cell partitioning into nucleus and cytoplasm. We considered …
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Vibration of a nonlinear shear deformable beam by numerical simulation
… of a uniform geometrically nonlinear shear deformable beam subjected to a transverse harmonic excitation is investigated by the method of numerical simulation. Rotatory and axial inertia are included in the model. The beam is simply supported with supports a fixed distance apart. The …
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Automatic 3D facial modelling with deformable models.
Facial modelling and animation has been an active research subject in computer graphics since the 1970s. Due to extremely complex biomechanical structures of human faces and peoples visual familiarity with human faces, modelling and animating realistic human faces is still one of greatest …
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From local and bulk structure-flow correlations to macro-scale transport properties with MRI: applications using deformable porous media and deep learning
… the solid framework and the local flow fields of deformable model porous systems were probed by both spatially and non-spatially resolved NMR methods and linked to bulk transport properties such as permeability and dispersion. Three-dimensional (3D) spatially resolved flow MRI measurements …
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Light field appearance manifolds
Statistical shape and texture appearance models are powerful image representations, but previously had been restricted to 2D or 3D shapes with smooth surfaces and lambertian reflectance. In this thesis we present a novel 4D appearance model using image-based rendering techniques, which can …
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Robust learning and segmentation for secure understanding
… to segmentation. Combined with a parametric deformable model, this technique provides smooth boundaries and globally salient structures.
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Motion compensation from limited data for reference-constrained image reconstruction
… problem by introducing an intermediate image model that expresses the target image as a combination of a generalized series model and a residual component. This model allows the reference and target images to have different contrast and can be used with various motion models. It also makes use …
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Segmentation of Subcortical Structures from Nonhuman Primate MRI
… Rhesus Macaque monkeys. Using the Level Set Deformable Model (LSDM) with a priori structural information, a series of T1-weighted MR images of Rhesus Macaque hippocampi and striatum were segmented in an effort to compare the structural hippocampal and striatal volumes between early and late …
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Dynamic Stability of Uncertain Laminated Beams Subjected to Subtangential Loads
… loads, using the dynamic criterion. Thus a shear-deformable laminated beam element, including warping effects, is derived to study the deterministic and probabilistic response of laminated beams. This twenty-one degrees of freedom element can be used for solving both static and dynamic problems. …
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Deformable meshes for shape recovery: models and applications
… more 3D objects become available. Among them, deformable objects have gained increasing interests. They include medical instances such as organs, a sequence of objects in motion, and objects of similar shapes where a meaningful correspondence can be established between each other. Thus, it …
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Development and Validation of Fluid-Structure Interaction in Aircraft Crashworthiness Studies
… accurate and effective developments in numerical modeling that have the possibility of replacing these rigorous physical experiments. Through finite element analysis, an in-depth investigation of an aircraft equipped with a fabricated composite undercarriage was evaluated during water ditching. …
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Segmentation and Fracture Detection in X-ray images for Traumatic Pelvic Injury
… which combines cubic spline interpolation with a deformable model approach which maintains curved contours and provides local control over segmentation. In order for the proposed system to be used as a component in a computerized decision support system, segmentation is designed to be entirely …
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Single-View 3D Reconstruction of Animals
… limited, particularly for highly articulated and deformable objects. Hence, the purpose of this thesis is to develop methods for single-view 3D reconstruction of non-rigid objects, specifically for people and animals. Our goal is to recover a full 3D surface model of these objects from a single …
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Video Scene Understanding: Semantic-based representation, Temporal Variation Modeling, Multi-Task Learning
… high-level information content of videos, (ii) modeling temporal variation of frame-based descriptors in videos, and (iii) proposing a multitask learning framework to leverage the huge amount of unlabeled videos. The first category covers a method for enriching visual words that contain local …
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Modelling geometric uncertainties in prostate radiotherapy
… of geometric errors into existing methods for modelling theeffectiveness of radiotherapy treatment. In this work the impact of geometric errors onthe tumour control probability (TCP) for prostate radiotherapy is investigated.Positional measurement data are analysed in a manner which …
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3D Morphable Models: Data Pre-Processing, Statistical Analysis and Fitting
… research aimed at using a 3D linear statistical model (known as a 3D morphable model) of an object class (which could be faces, bodies, cars, etc) for robust shape recovery. Our aim is to use this recovered information for the purposes of potentially useful applications like recognition and …
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3D tooth surface reconstruction
… leading to the creation of a point distribution model (PDM). During the reconstruction process, an automatic rigid registration (possibly preceded by a manual one) is realized to align the model with the target, and the PDMa??s parameters are optimized to transform the target by minimizing the …
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The utility of synthetic images for face modelling and its applications
In recent years, deformable face model based approaches have been a very active area of research. The Active Appearance Model (AAM) has been by far the most popular approach for generating the face models and has been used in several facial image analysis based applications. This thesis …
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The utility of synthetic images for face modelling and its applications
In recent years, deformable face model based approaches have been a very active area of research. The Active Appearance Model (AAM) has been by far the most popular approach for generating the face models and has been used in several facial image analysis based applications. This thesis …