Results 1 to 10 of about 3,762 (155)
Measurement of Rock Joint Surfaces by Using Smartphone Structure from Motion (SfM) Photogrammetry [PDF]
Sensors, 2021 The measurement of rock joint surfaces is essential for the estimation of the shear strength of the rock discontinuities in rock engineering. Commonly used techniques for the acquisition of the morphology of the surfaces, such as profilometers and laser ...
Pengju An +4 more
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Microscopic Structure from Motion (SfM) for Microscale 3D Surface Reconstruction [PDF]
Sensors, 2020 In microscale photogrammetry, the confocal microscopic imaging technique has been the dominant trend. Unlike the confocal imaging mostly for transparent objects, we propose a novel method to construct a 3D shape in microscale for various micro-sized ...
Dugan Um, Sangsoo Lee
doaj +8 more sources
On-Barn Pig Weight Estimation Based on Body Measurements by Structure-from-Motion (SfM). [PDF]
Sensors (Basel), 2018 Information on the body shape of pigs is a key indicator to monitor their performance and health and to control or predict their market weight. Manual measurements are among the most common ways to obtain an indication of animal growth. However, this approach is laborious and difficult, and it may be stressful for both the pigs and the stockman.
Pezzuolo A +5 more
europepmc +4 more sources
ISPRS International Journal of Geo-Information, 2021 Thanks to sensor developments, unmanned aircraft system (UAS) are the most promising modern technologies used to collect imagery datasets that can be utilized to develop agricultural applications in these days. UAS imagery datasets can grow exponentially
Anjin Chang +5 more
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SfM with MRFs: Discrete-Continuous Optimization for Large-Scale Structure from Motion [PDF]
IEEE Transactions on Pattern Analysis and Machine Intelligence, 2013 Recent work in structure from motion (SfM) has built 3D models from large collections of images downloaded from the Internet. Many approaches to this problem use incremental algorithms that solve progressively larger bundle adjustment problems. These incremental techniques scale poorly as the image collection grows, and can suffer from drift or local ...
David J. Crandall +3 more
exaly +3 more sources
Dense-SfM: Structure from Motion with Dense Consistent Matching
2025 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR)We present Dense-SfM, a novel Structure from Motion (SfM) framework designed for dense and accurate 3D reconstruction from multi-view images. Sparse keypoint matching, which traditional SfM methods often rely on, limits both accuracy and point density, especially in texture-less areas.
JongMin Lee, Sungjoo Yoo
exaly +3 more sources
International Journal of Applied Earth Observation and Geoinformation, 2018 Abstract Structure from Motion (SfM) represents a good low-cost alternative to generate high resolution topography where LiDAR (Light Detection and Ranging) data is scarce or unaffordable. In this work, we demonstrate the advantages of high resolution elevation models (DEM) obtained using the SfM technique to delineate catchment boundaries and the ...
Luis A Mendez-Barroso +1 more
exaly +2 more sources
Remote Sensing, 2023 Forest structural parameters are key indicators for forest growth assessment, and play a critical role in forest resources monitoring and ecosystem management. Terrestrial laser scanning (TLS) can obtain three-dimensional (3D) forest structures with ultra-high precision without destruction, whereas some shortcomings such as non-portability and cost ...
Lin Cao
exaly +3 more sources
Dynamics of visual reversals from ambiguous spinning biological-motion and rigid structure-from-motion [PDF]
i-PerceptionThree-dimensional rigid structure-from-motion (SFM) and structure from nonrigid biological point-light motion stimuli are perceptually ambiguous. This study investigated the dynamics of perceived reversals in two cases: a spinning point-light walker (PLW)
Leo Poom
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A Comparative Analysis of Unmanned Aircraft Systems in Low Altitude Photogrammetric Surveys
Remote Sensing, 2022 Comparing photogrammetric performances of four user-grade unmanned aircraft systems (UAS) is the main aim of this paper. This study investigates what is the more suitable UAS for specific applications considering the required scale factor, such as for ...
Francesco Mugnai, Grazia Tucci
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