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 74 for “"3D images"”.
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Novel haptic interface For viewing 3D images
… and systems capable of displaying stereoscopic 3D images. While these systems provide an improved experience over traditional bidimensional displays they often fall short on user immersion. Usually these systems only improve depth perception by relying on the stereopsis phenomenon. We propose a …
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Object Localization, Segmentation, and Classification in 3D Images
… problem of identifying objects of interest in 3D images as a set of related tasks involving localization of objects within a scene, segmentation of observed object instances from other scene elements, classifying detected objects into semantic categories, and estimating the 3D pose of detected …
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Two algorithms for Lossy compression of 3D images
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1995.
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Digital Watermarking for Depth-Image-Based Rendering 3D Images and Its Application to Quality Evaluation
Due to the rapid development of 3D display market, the protection and authentication of the intellectual property rights of 3D multimedia has become an essential concern. As a consequence, the digital watermarking for 3D image and video is attracting considerable attention. The depth-image-based …
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Solution of a Second Order Elliptic Partial Differential Equation with Varying Complex Coefficients: An Application for Computing Effective Complex Electrical Properties of Materials represented by 3D Images
… a static field. The material is represented in a 3D image. The Finite Element method and periodic boundary conditions are used to build an energy function which is minimised using the Conjugate Gradient algorithm. It allows to obtain the electric potentials, and then the computation of the …
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Solution of a Second Order Elliptic Partial Differential Equation with Varying Complex Coefficients: An Application for Computing Effective Complex Electrical Properties of Materials represented by 3D Images
… a static field. The material is represented in a 3D image. The Finite Element method and periodic boundary conditions are used to build an energy function which is minimised using the Conjugate Gradient algorithm. It allows to obtain the electric potentials, and then the computation of the …
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Method for Segmentation of Structures in the Serially Sectioned Images of the Entire Body and Surface Reconstruction to Make Three-Dimensional Images
… of this research is to prepare the segmented images of whole body in detail, which are distributed to help other investigators make 3D images and virtual dissection software of whole body. Second purpose is to present of semi-automatic surface reconstruction on the commercial software, which …
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2D-3D Registration Methods for Computer-Assisted Orthopaedic Surgery
2D-3D registration is one of the underpinning technologies that enables image-guided intervention in computer-assisted orthopaedic surgery (CAOS). Preoperative 3D images and surgical plans need to be mapped to the patient in the operating room before they can be used to augment the surgical …
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Protein Loop Length Estimation From Medium Resolution Cryoem Images
… an important biophysical technique that produces 3D subnanometer resolution images of molecules not amenable to past approaches like x-ray crystallography or nuclear magnetic resonance. De novo modeling is becoming a promising approach to derive the atomic structure of proteins from the cryoEM 3D …
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Head mounted display architectures for 3D augmented reality
… and be able to display bright, high-resolution 3D images. Current AR displays are limited by bulky-form factors with a limited field of view (FOV), and the inability to display high quality 3D images without introducing side effects such as nausea and eyestrain. In the first part of this thesis …
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Scalable algorithms for semi-automatic segmentation of electron microscopy images of the brain tissue
… scalable algorithms for segmenting very large 3D images of brain tissue. Currently, light and electron microscopy can now produce terascale 3D images within hours. Extracting the information about the shapes and connectivity of the neurons require fast and accurate image segmentation …
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Analyzing Performance of Bounding Volume Hierarchies for Ray Tracing
… the ray tracing algorithm used to render 3D images. There are many possible variations to consider when implementing a BVH for a particular ray tracing project. The goal of this thesis is to gain an understanding of how a few of the most significant design decisions affect a BVH’s …
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A design and implementation of an efficient, parallel watershed algorithm for affinity graphs
… for hierarchical segmentintation of large scale 3D images of the brain tissue obtained by electron microscopy making it an essential tool for reconstructing the brain's neural-networks called connectomes. The algorithm was fully implemented in C++ and tested on a currently largest available …
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QUiLT (Quantitative Ultrasound in Longitudinal Tissue Tracking): Stitching 2D images into 3D Volumes for Organ Health Monitoring
… liver disease (CLD). Unlike 2D property maps, 3D property maps allow for precise, consistent, and accurate longitudinal comparison because they eliminate the variabil- ities associated with the underlying image acquisition protocol. 3D organ reconstruc- tions provide a holistic view of the …
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Path Planning for Trajectory Guided Freehand Ultrasound Scan
… crucial role in medical diagnosis and analysis. 3D medical imaging provides more comprehensive and greater anatomical detail of internal body structures when compared to traditional 2D images, allowing for more accurate measurement of organ and tumor volume, and prediction and monitoring of some …
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Three-Dimensional Body Volume Measurement From Two-Dimensional Images: Towards A Smartphone Application
… health outcomes for patients. Three-dimensional (3D) scanners provide a useful tool to provide body measurements based on 3D images in obesity management. However, such scanners are often inaccessible due to cost. A smartphone image-based method able to produce 3D images may provide a more …
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EVALUATION OF INTERPOLATION AND REGISTRATION TECHNIQUES IN MAGNETIC RESONANCE IMAGE FOR ORTHOGONAL PLANE SUPER RESOLUTION RECONSTRUCTION
… the 2 scans of the orthogonal plane, new 3D images can be reconstructed. This thesis addresses the principal problem of image quality and considers a novel SRR technique that uses the original information from 3 MRI plane orientations in order to enhance the resolution based on prior …
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Digital holographic imaging of aquatic species
… system, capable of capturing three-dimensional (3D) images of aquatic species. The images produced by this system are used in a non-intrusive manner to characterize the abundance, morphology and 3D location of the aquatic species. The DHI system operates by recording the hologram produced by the …
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Design and development of a 3D X-ray microscope
… theorem were used to regenerate conventional CT images as well as contrast volumetric 3D images of the internal structures of opaque objects. This paper presents the design and development of the 3D x-ray microscope together with experimental results obtained during the calibration and initial …
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