Results 21 to 30 of about 65,417 (304)

RECONSTRUCTION OF SCAFFOLDING COMPONENTS FROM PHOTOGRAMMETRIC POINT CLOUDS OF A CONSTRUCTION SITE [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2015
This paper presents a data-driven workflow for the detection of scaffolding components from point clouds. The points belonging to the scaffolding components are identified and separated from the main building structures and two basic elements, namely the
Y. Xu, J. He, S. Tuttas, U. Stilla
doaj   +1 more source

Reliability and Accuracy of 2D Photogrammetry: A Comparison With Direct Measurement

Frontiers in Public Health, 2022
ObjectiveFacial anthropometric data is important for the design of respirators. Two-dimensional (2D) photogrammetry has replaced direct anthropometric method, but the reliability and accuracy of 2D photogrammetry has not been quantified. This study aimed
Yin Cheng Lim, Yin Cheng Lim, Ameerah Su'ad Abdul Shakor, Rafiza Shaharudin   +3 more
doaj   +1 more source

IMPROVING THE INTERNAL ACCURACY OF UAV-IMAGE BLOCKS USING LOCAL LOW-ALTITUDE FLIGHTS AND SCALE-BARS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021
Accurate image-based measurement based on UAV data is attracting attention in various applications. While the external accuracy of the UAV image blocks could be mainly affected by object-space information like number and distribution of ground control ...
M. Maboudi, A. Elbillehy, Y. Ghassoun, M. Gerke   +3 more
doaj   +1 more source

AUTOMATIC CLASSIFICATION OF AERIAL IMAGERY FOR URBAN HYDROLOGICAL APPLICATIONS [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
In this paper we investigate the potential of automatic supervised classification for urban hydrological applications. In particular, we contribute to runoff simulations using hydrodynamic urban drainage models. In order to assess whether the capacity of
A. Paul, C. Yang, U. Breitkopf, Y. Liu, Z. Wang, F. Rottensteiner, M. Wallner, A. Verworn, C. Heipke   +8 more
doaj   +1 more source

COOPERATIVE IMAGE ORIENTATION CONSIDERING DYNAMIC OBJECTS [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022
In the context of image orientation, it is commonly assumed that the environment is completely static. This is why dynamic elements are typically filtered out using robust estimation procedures.
P. Trusheim, M. Mehltretter, F. Rottensteiner, C. Heipke   +3 more
doaj   +1 more source

Absolute height measurement of specular surfaces with modified active fringe reflection photogrammetry [PDF]

, 2014
Deflectometric methods have been studied for more than a decade for slope measurement of specular freeform surfaces through utilization of the deformation of a sample pattern after reflection from a tested sample surface.
Zhang, Zonghua, Ren, Hongyu, Xiangqian Jiang, Hongyu Ren, Jiang, Xiangqian, Zonghua Zhang, Zhang, Zhonghua, Feng Gao, Gao, Feng   +8 more
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Filtering of Point Clouds from Photogrammetric Surface Reconstruction [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2014
The density and data volumes for recorded 3D surfaces increase steadily. In particular during photogrammetric surface reconstruction and laser scanning applications these volumes often exceed the limits of the available hardware and software. The large
K. Wenzel, M. Rothermel, D. Fritsch, N. Haala   +3 more
doaj   +1 more source

Bundle adjustment with polynomial point-to-camera distance dependent corrections for underwater photogrammetry

, 2021
Uncontrolled refraction of optical rays in underwater photogrammetry is known to reduce its accuracy potential. Several strategies have been proposed aiming at restoring the accuracy to levels comparable with photogrammetry applied in air.
Menna F., Nocerino E., Gruen A.
core   +1 more source

An Approach for RGB-Guided Dense 3D Displacement Estimation in TLS-Based Geomonitoring [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Estimating 3D deformation with high spatial resolution from TLS point clouds is beneficial for geomonitoring. Existing methods for this task primarily rely on geometric data. They do not use radiometric information although it is often available as well.
Z. Wang, J. A. Butt, J. A. Butt, S. Huang, N. Meyer, T. Medić, A. Wieser   +6 more
doaj   +1 more source

EXTRACTION OF SOLAR CELLS FROM UAV-BASED THERMAL IMAGE SEQUENCES [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
This paper discusses the automatic generation of thermal infrared ortho image mosaics and the extraction of solar cells from these ortho image mosaics. Image sequences are recorded by a thermal infrared (TIR) camera mounted on a remotely piloted aerial ...
L. Hoegner, N. Pfaffenzeller, L. Wagner, U. Stilla   +3 more
doaj   +1 more source