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 35 for “"feature tracking"”.
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Facial feature tracking using deformable templates
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1997.
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Autonomous & adaptive oceanographic feature tracking on board autonomous underwater vehicles
… allowing them to sample and track various features of interest with greater efficiency and synopticity than previously possible with preplanned AUV or ship-based surveys. This concept is demonstrated to work in field testing on multiple occasions: with a single AUV autonomously and …
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Robust Feature Tracking in Image Sequences Using View Geometric Constraints
In computer vision, interest point tracking across an image sequence is a fundamental technique for determining motion characteristics. Once motion is extracted it can be applied to a wide array of other practical applications, including but not limited to automated surveillance, three-dimensional …
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Autonomous & adaptive oceanographic feature tracking on board autonomous underwater vehicles
… allowing them to sample and track various features of interest with greater efficiency and synopticity than previously possible with preplanned AUV or ship-based surveys. This concept is demonstrated to work in field testing on multiple occasions: with a single AUV autonomously and …
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Video Stabilization and Target Localization Using Feature Tracking with Video from Small UAVs
<p>Unmanned Aerial Vehicles (UAVs) equipped with lightweight, inexpensive cameras have grown in popularity by enabling new uses of UAV technology. However, the video retrieved from small UAVs is often unwatchable due to high frequency jitter. Beginning with an investigation of previous …
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Untersuchung der myokardialen Deformation des singulären linken Ventrikels mittels 2-dimensionaler Feature Tracking Magnetresonanztomographie
… in der Fontan-Zirkulation mittels 2D-MRT Feature Tracking und 2D-Speckle Tracking Echokardiographie untersucht und mit gesunden Kontrollen verglichen. Die meisten Patienten waren der NYHA-Klasse I zuzordnen und hatten eine normale Ejektionsfraktion (Median 55,6%), die jedoch gegenüber …
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Model-Based Tracking of Articulated Objects
… on-line model-based generation of complex features for use as templates, the characterization of uncertainties in point feature motion for use in assimilating feature tracking results, the use of the sum-of-squared-differences (SSD) image correlation measure as a measurement of the …
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Real-Time Head and Facial Motion Analysis for Model-Based Video Coding
… an algorithm for automatic head and facial feature tracking using a model-based approach. The input to the system is a 2D video sequence of a head-and-shoulders scene and the output is the trajectories of salient facial features, an estimate of the 3D motion of the head, and the …
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Autonomous optical navigation for lunar missions
… analysis methods. The measurements include a feature tracking camera measurement, star landmark elevation measurement, star horizon elevation measurement, and star occultation measurement. Based on trade studies performed, the star landmark measurement is superior to the star horizon …
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Stabilization and Control of a Quad-Rotor Micro-UAV Using Vision Sensors
… to perform on-board vision processing and feature tracking without the aid of a ground station or wireless transmission. Using this on-board feature tracking system a drift stabilization control system has been developed that allows indoor flight of the Helio-copter without tethers. The …
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Efficient feature detection using OBAloG: optimized box approximation of Laplacian of Gaussian
… the algorithm performs better than leading feature tracking algorithms including SIFT and SURF in terms of speed and accuracy.
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A procedure for the computation of sea surface advection velocities from satellite thermal band imagery, with applications to the South East Atlantic Ocean
… used for the vector computation. An automatic feature tracking method was tested as a means for computing advection velocities but was found to be unsatisfactory. As a result, a 'semi-automated' procedure was developed. This process is essentially a manual (point-wise) feature tracking …
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Long-range video motion estimation using point trajectories
… of applications and differs from optical flow, feature tracking, and parametric or layer-based models. We demonstrate the algorithm on challenging real-world videos that include complex scene geometry, multiple types of occlusion, regions with low texture, and non-rigid deformation.
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Learning articulated motions from visual demonstration
… algorithms that combine concepts in sparse feature tracking, motion segmentation, object pose estimation, and articulation learning, to develop our proposed framework. Additionally, our methods can predict the motion of previously seen articulated objects in future encounters. We present …
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Agricultural Crop Monitoring with Computer Vision
… multispectral image registration, and the feature tracking of a stressed plant. The accuracy of several image segmentation methods are compared. Basic thresholding on pixel intensities and vegetation indices result in accuracies below 75% . Neural networks (NNs) and support vector machines …
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Stereo visual simultaneous localisation and mapping for an outdoor wheeled robot: a front-end study
… Nvidia Jetson TK1 processor. A stereo front-end feature tracking framework was described and evaluated both in simulation and experimentally where appropriate. It was found that scale adversely affected lighting conditions, FOV, baseline, and processing power available, all crucial factors to …
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Omnidirectional Vision for an Autonomous Surface Vehicle
… image processing procedure is designed: feature detection, feature tracking, motion detection, and outlier rejection. The choice of point-wise features and outlier rejection based method makes motion detection and stationary obstacle detection efficient. Long run outdoor experiments are …
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Effects of different camera motions on the error in estimates of epipolar geometry between two dimensional images in order to provide a framework for solutions to vision based Simultaneous Localization and Mapping (SLAM)
This thesis explores the effect camera motion and feature tracking have on the estimations of an epipolar geometry at different stages of a 3D reconstruction and relates the findings to a framework for vision based Simultaneous Localization and Mapping (SLAM). Although there have been previous …
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