Results 61 to 70 of about 55,134,575 (221)

Application of Photogrammetry and Mesh Comparison in the Study of Human Cranial Morphology

International Journal of Osteoarchaeology, EarlyView.
ABSTRACT Photogrammetric methods for generating three‐dimensional (3D) models are becoming increasingly widespread in the fields of archaeology and biological anthropology. In particular, the study of the variability of skull morphology (generated by the ancestry of the individual or by the application of certain cultural practices) using 3D models is ...
Carlos Cancio Moreno, Javier Lescure, Antonio González‐Martín   +2 more
wiley   +1 more source

ACCURACY OF 3D RECONSTRUCTION IN AN ILLUMINATION DOME [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2016
The accuracy of 3D surface reconstruction was compared from image sets of a Metric Test Object taken in an illumination dome by two methods: photometric stereo and improved structure-from-motion (SfM), using point cloud data from a 3D colour laser ...
L. MacDonald, I. Toschi, E. Nocerino, M. Hess, F. Remondino, S. Robson   +5 more
doaj   +1 more source

A Process-Oriented Method for Rapid Acquisition of Canopy Height Model From RGB Point Cloud in Semiarid Region

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2021
This study addressed the problems of difficult parameter selection of ground point filtering algorithm, slow speed, and susceptibility to wrong classification points of the traditional interpolation algorithm in extracting canopy height model from dense ...
Yu Tian, Zhengfu Bian, Shaogang Lei, Chuning Ji, Yibo Zhao, Shubi Zhang, Lei Duan, Vladimir Sedlak   +7 more
doaj   +1 more source

Human Prostate Cell Lines: Derivation, Molecular Characteristics and Appropriate Use

The Prostate, EarlyView.
ABSTRACT Background Research on prostate cancer and benign prostatic hyperplasia depends on a small number of immortalized human cell lines established between 1977 and 2001, most of them from advanced metastatic disease. The cell lines differ from one another in androgen receptor status, prostate‐specific antigen secretion, p53 status, karyotype and ...
Hamza Abohamra, Keenau Mark Pearce
wiley   +1 more source

Technological innovation in the recovery and analysis of 3D forensic footwear evidence: Structure from motion (SfM) photogrammetry

Science & Justice, 2021
The recovery of three-dimensional footwear impressions at crime scenes can be a challenge but can also yield important investigative data. Traditional methods involve casting 3D impressions but these methods have limitations: the trace is usually destroyed during capture; the process can be time consuming, with a risk of failure; and the resultant cast
Hannah Larsen, Marcin Budka, Matthew R. Bennett   +2 more
openaire   +2 more sources

Graph Rigidity for Near-Coplanar Structure from Motion [PDF]

, 2011
Recent algorithms for monocular motion capture (MoCap) estimate weak-perspective camera matrices between images using a small subset of approximately-rigid points on the human body (i.e. the torso and hip).
Upcroft, Ben, Lucey, Simon, Jack Valmadre, Ben Upcroft, Sridha Sridharan, Sridharan, Sridha, Valmadre, Jack, Simon Lucey   +7 more
core   +1 more source

FLSea: Underwater Visual–Inertial and Stereovision Forward‐Looking Data Sets

Journal of Field Robotics, EarlyView.
ABSTRACT Visibility underwater is challenging and degrades as the distance between the subject and the camera increases. That is why forward‐looking underwater computer vision tasks are difficult. We have collected underwater forward‐looking stereovision and visual–inertial image sets using two underwater imaging platforms, a stereo camera rig, and an ...
Yelena Randall, Ori Lifschitz, Tali Treibitz   +2 more
wiley   +1 more source

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

PLoS 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

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

Earth 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

Efficient and Accurate Spatio‐Temporal Population Monitoring of Mobile Animals Using Drones and Computer Vision

Remote Sensing in Ecology and Conservation, EarlyView.
Drones and computer vision offer an efficient way to estimate animal populations over localized areas, but surveys often require stitching many overlapping images together. If animals move during the survey, traditional orthomosaic‐based counting methods become unreliable, with some animals appearing in multiple locations while others appear not at all,
Benjamin Koger, Albert B. Kao, Curry J. Cunningham, Thomas P. Quinn, Caroline Kittle, Andrew M. Berdahl   +5 more
wiley   +1 more source