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 11 of 11 for “"Contour detection"”.
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A deep learning algorithm for contour detection in synthetic 2D biplanar X-ray images of the scapula: towards improved 3D reconstruction of the scapula
… this approach. The literature shows that detection and use of contours to locate corresponding landmarks within biplanar X-ray images can address this limitation. The aim of this research project was to train and validate a deep learning algorithm for detection the contour of a scapula in …
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Kontūro atpažinimo metodų taikymas skersinei chromatinei aberacijai šalinti akies dugno vaizduose ir kelio dangos defektams atpažinti /
… in the context of image analysis and processing, contour recognition methods are investigated for solving the problem of road surface defect recognition and lateral chromatic aberration in eye fundus images. The recognition of object contours in raster images is relevant in many practical fields: …
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Automated detection of ultrastructural features at neuronal synapses
… vesicles against background pixels. We then use contour detection on the resulting segmentation maps to determine individual vesicle centers and effective diameters. To our knowledge, there are no baselines in this task so we establish one on an in-house dataset. Our results show that the …
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Surfaces From Stereo: An Integrated Approach
… features. Also, occluding and ridge contours (depth and orientation discontinuities) have not been explicitly detected and this has made surface interpolation difficult. The approach described in this thesis is novel in that it integrates the processes of feature matching, contour …
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The Role of Early Recurrence in Improving Visual Representations
… a psychological experiment involving a moving contour illusion. Simulation results indicated that the proposed computation behaviourally reproduces the original observations. The ultimate goal of this work is to investigate whether the proposal is capable of improving computer vision …
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Image Analysis Techniques for LiDAR Point Cloud Segmentation and Surface Estimation
Light Detection And Ranging (LiDAR), as well as many other applications and sensors, involve segmenting sparse sets of points (point clouds) for which point density is the only discriminating feature. The segmentation of these point clouds is challenging for several reasons, including the fact that …
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System for vessel characterization : development and evaluation with application to deep vein thrombosis diagnosis
… the literature as an approach to improve overall detection of the disease. The system uses a spatial Kalman filter-based algorithm with an elliptical model in the measurement equation to detect vessel contours in transverse ultrasound images and estimate ellipse parameters, and temporal constant …
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Dynamic and Integrative Properties of the Primary Visual Cortex
… trained to perform a delayed-match-to-sample contour detection task. We found that the ability of V1 neurons to summate visual inputs from beyond the classical receptive field (cRF) imbues them with selectivity for complex contour shapes, and that neuronal shape selectivity in V1 changed …
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A Computer Vision Tool For Use in Horticultural Research
With growing concerns about global food supply and environmental impacts of modern agriculture, we are seeing an increased demand for more horticultural research. While research into plant genetics has seen an increased throughput from recent technological advancements, plant phenotypic research …
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Mind-craft: Exploring the relation between "digital" visual experience and orientation in visual contour perception
… that canonical (horizontal and vertical) contours embedded in visual noise were detected more accurately and quickly than oblique contours. For Experiment 2, the orientation anisotropy of natural, urban, and digital scenes was analyzed, in order to compare the magnitude of this anisotropic …
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Multiphase oil transport at complex micro geometry
… film status. The model also applies quick contour detection algorithm to avoid the problems caused by equation's singularity around contact points and slow convergence caused by complex contact patterns. Furthermore, the models can be easily adapted to different scales. With the strong link …