Results 71 to 80 of about 55,134,654 (225)

Short communication: Challenges and applications of structure-from-motion photogrammetry in a physical model of a braided river [PDF]

open access: yesEarth Surface Dynamics, 2019
For extending the applications of structure-from-motion (SfM) photogrammetry in river flumes, we present the main challenges and methods used to collect a large dataset (>1000 digital elevation models, DEMs) of high-quality topographic data using ...
P. Leduc, S. Peirce, P. Ashmore
doaj   +1 more source

The Application of Autonomous Fixed‐Wing Drones in the Sub‐Antarctic Operating Beyond Visual Line of Sight to Enable Large Area, Multi‐Species Population Monitoring in a Changing Environment

open access: yesRemote Sensing in Ecology and Conservation, EarlyView.
Autonomous fixed‐wing drones operating beyond visual line of sight of the pilot were used to conduct the first aerial, multi‐species baseline reference survey at the sub‐Antarctic island of South Georgia. Long‐term population monitoring in this remote, challenging environment has historically proved difficult, with terrestrial monitoring generally ...
N. Fenney   +5 more
wiley   +1 more source

Overview of Structure from Motion [PDF]

open access: yes
In this paper is given an overview of tools and techniques for obtain information about the geometry of 3D scenes from 2D images. The generating three-dimensional structure from a series of 2D images or video of scenes is known as Structure from ...
Mijakovska, Svetlana
core   +1 more source

Basic steps and techniques using in obtaining the structure from motion [PDF]

open access: yes, 2017
Obtaining structure from motion (recovery three dimensional structure from video footage of scenes) has been a interesting area of research in computer vision. This problem is known as Structure from Motion (SfM).
Mijakovska, Svetlana, Popovski, Filip
core   +2 more sources

Divergent mechanisms of perceptual reversals in spinning and wobbling structure-from-motion stimuli.

open access: yesPLoS ONE
This study explores the visual phenomenon of random dot structure-from-motion (SFM), where the brain perceives 3D shapes from the coordinated 2D motion of dots.
Leo Poom
doaj   +1 more source

THE TRIPLET MEASURED BY AERIAL CAMERA USING LINE SEGMENTS LINE MATCHING-BASED RELATIVE ORIENTATION USING TRIPLET CAMERA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
In urgent observations after disasters, we can mention that the image matching processing is an essential technique to establish more stable and rapid 3D data generation. Particularly, multi-images taken from various viewpoints are useful in the disaster
S. Tanaka, M. Nakagawa
doaj   +1 more source

Automated 3D reconstruction of rural buildings from Structure-from-Motion (SFM) photogrammetry approach

open access: yesEngineering for Rural Development, 2018
n ...
Pezzuolo, Andrea   +3 more
openaire   +3 more sources

Theoretical framework for updating cross‐sections in river models using non‐standard information coming from crowdsourced images

open access: yesRiver, EarlyView.
Abstract During high rainfall events, one reason for flooding in urban rivers is hydraulic blockages or obstructions in channels. These may cause damming and an immediate increase in upstream water levels, leading to inundation of surroundings. The accuracy of flood models is strongly dependent on the representation of the topography of floodplain and ...
Muhammad Haris Ali   +3 more
wiley   +1 more source

Vision language models for bridge inspections: A review of applications in image‐based damage documentation

open access: yesStructural Concrete, EarlyView.
Abstract Automating bridge inspections requires more than detecting individual damage instances. It demands systems capable of describing, contextualizing, and interpreting damage in an inspection‐relevant manner. Conventional computer vision approaches, such as object detection and segmentation, primarily address visual recognition tasks and are ...
Rona Firdes Çelik   +2 more
wiley   +1 more source

Supplemental material: A comparison of terrestrial laser scanning and structure-from-motion photogrammetry as methods for digital outcrop acquisition

open access: yes, 2016
Geosphere, December 2016, v. 12, p. 1865-1880, doi:10.1130/GES01342.1, Supplemental Items - Supplemental Table 1: Registration errors between terrestrial laser scanning-reflective targets and GNSS-surveyed positions.
R.R. Jones (8297019)   +6 more
core   +1 more source

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