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 32 for “"3D Mapping"”.
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3D Mapping of Islamic Geometric Motifs
In this thesis a novel approach in generating 3D IGP is applied using shape grammar, an effective pattern generation method. The particular emphasis here is to generate the motifs (repeat unit) in 3D using parameterization, which can then be manipulated within 3D space to construct architectural …
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3D Mapping of Islamic Geometric Motifs
In this thesis a novel approach in generating 3D IGP is applied using shape grammar, an effective pattern generation method. The particular emphasis here is to generate the motifs (repeat unit) in 3D using parameterization, which can then be manipulated within 3D space to construct architectural …
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Applied Aerial Autonomy for Reliable Indoor Flight and 3D Mapping
… for wind rejection, and (3) indoor aerial 3D mapping. The dissertation begins with introducing a comprehensive nonlinear filtering framework for UAV parameter estimation, which considers factors such as external wind, drag coefficients, IMU bias, and center of pressure. Additionally, it …
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Robot search and rescue : a comparison of 3D mapping techniques
… need extensive knowledge of their surroundings. 3D mapping allows for the creation of such complex maps, and here we explore some of the options available for the creation of 3D maps. We consider using 2D and 3D sensors to see how helpful the extra information is.
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Fourier Transform Interferometry for 3D Mapping of Rough and Discontinuous Surfaces
… of existing optical techniques for non-contact 3D surface mapping, Fourier Transform Interferometry (FTI) is the method that most elegantly combines simplicity with high speed and high resolution. FTI generates continuous-phase surface maps from a projected optical interference pattern, which is …
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Autonomous Navigation and Simultaneous 3D Mapping with a UGV in an Open-Ended Environment
… model with multi-sensor fusion and simultaneous 3D mapping capabilities for the Clearpath Husky A200 unmanned ground vehicle (UGV) operating in complex outdoor environments. By combining panoptic segmentation for comprehensive scene understanding with the ROS2 Navigation Stack (Nav2) and RTAB-Map …
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Decentralized collaborative localization in urban environments with inter-agent ranging and 3D-mapping-aided (3DMA) GNSS
… inter-agent communication. Additionally, a 3D Map of the environment can be used to predict and account for the effects of multipath and signal-blockage. Shadow Matching has shown high potential in 3D-mapping-aided (3DMA) GNSS navigation for a single agent in urban environments, but it …
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Sensor Fused Scene Reconstruction and Surface Inspection
Optical three dimensional (3D) mapping routines are used in inspection robots to detect faults by creating 3D reconstructions of environments. To detect surface faults, sub millimeter depth resolution is required to determine minute differences caused by coating loss and pitting. Sensors that can …
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Three-dimensional interactive maps - theory and practice
… the enabling technologies for three-dimensional (3D) mapping have been ready for some time, and the benefits are significant, one might expect that a wide adoption of threedimensional maps should already be happening. However, for some reason, the transition to 3D cartography is not happening as …
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Energy-Efficient Real-Time Hardware Acceleration for Gaussian Fitting
… such systems can complete. Specifically, 3D mapping algorithms significantly contribute to the compute power footprint as a result of repeated memory accesses. A promising approach involving Gaussian Mixture Models (GMMs), Single-Pass Gaussian Fitting (SPGF) algorithm, allowed for …
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3D Geologic Mapping and Characterization Using Digital Outcrop Models Generated from Uninhabited Aerial Vehicles and Structure-from-Motion Photogrammetry
… across various scales. Conventional field mapping techniques have remained largely unchanged for the past two centuries and are commonly limited in their ability to quantitatively constrain measurements, extend observations laterally, and document features at multiple scales. Recently, …
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High Accuracy Mobile 3D Scanning Using Structured Laser Beam Patterning
… of calculating nutritional information by using 3D reconstruction and image processing. This system is called Dietary Data Recorder System (DDRS), which consists of a smartphone, a laser projector, and the main algorithm, which extracts the data from the DDRS for volume and nutritional …
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Improving Aerial Package Delivery Through Simulation of Hazard Detection, Mapping, and Regulatory Compliance
… was used to test hazard-detection and 3D-mapping. The tools presented in this research partly support the goal of autonomous drone package delivery, but additional testing is required to integrate these tools efficiently and then use them to train and safely operate a drone.</p>
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Simultaneous Three-Dimensional Mapping and Geolocation of Road Surface
This thesis paper presents a simultaneous 3D mapping and geolocation of road surface technique that combines local road surface mapping and global camera localization. The local road surface is generated by structure from motion (SFM) with multiple views and optimized by Bundle Adjustment (BA). A …
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On the construction of an autonomous 3D machine vision system and the development of techniques for interpreting its output data
… from fast, hardwired circuitry which generates a 3D mapping of its field of view in a bank of dual ported memory. The system uses the standard active triangulation technique known as "strip-lighting" but integrates the conventional components in a manner which allows efficient and fully autonomous …
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Volumetric Mapping for Medical Imaging and Geometry Processing
Mapping is the task of computing a transformation from a source shape to a target domain. It is a central problem in medical imaging and computer graphics. Most methods for this task apply only to two-dimensional (2D) surfaces. The neglected task of volumetric (3D) mapping, a natural extension …
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Visual Simultaneous Localization and Mapping: From Geometry to Deep Learning
Visual Simultaneous Localization and Mapping (SLAM) is essential to achieve persistent autonomy for mobile robots in unknown environments, and is a key technique for enormous vision based applications, such as virtual and augmented reality. Researchers from the robotics and computer vision …
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Three-dimensional flow-induced dynamics of the endothelial surface glycocalyx layer
… of single particles in three-dimensional (3D) space with high precision, typically 1~4 nm in the XY plane and 15 ~ 40nm in the Z-direction along the optical axis of the microscope. With the use of quantum dots (QDs), semiconducting nanoparticles of superior optical characteristics, this …
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Intensyvių femtosekundinių šviesos bangų paketų sklidimo Kero terpėse laikinis ir erdvinis charakterizavimas /
… high resolution temporal, spatial and spectral mapping of light wave-packet dynamics during the nonlinear propagation in transparent media, and enabled to observe and make accurate quantitative evaluation of the ultrafast change of medium properties. By means of high temporal (20 fs) and spatial …
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Resolving oxidation phenomena in layered semiconductors and scaled heterogeneous integration for low-power electronics
… This can be scaled to the non-destructive 3D mapping of semiconductor / oxide heterostructures, from 1 μm lateral resolution to wafer-scale processing. When applied to the study of HfS2 oxidation, this methodology enables ready access to buried HfS2 layers, oxide quality, and lateral and …
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