Three-Dimensional Model and Orthophotomap's Quality Evaluation Towards Facilitating Aerial Reconnaissance of Flood Response Needs

Zwęgliński, Tomasz; Smolarkiewicz, Marcin

doi:10.4324/9781003256977-17

Cited by 2 publications

(1 citation statement)

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“…The significance of 3D point cloud quality assessment extends across various domains, including urban planning [ 1 ], environmental monitoring [ 2 ], archeology, cultural heritage documentation [ 3 ], and disaster management [ 4 ]. This detailed spatial information facilitates accurate terrain analysis, volumetric assessments, and object localization, facilitating informed processes [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

Quality Analysis of 3D Point Cloud Using Low-Cost Spherical Camera for Underpass Mapping

Rezaei,

Maier,

Arefi

2024

Sensors

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Three-dimensional point cloud evaluation is used in photogrammetry to validate and assess the accuracy of data acquisition in order to generate various three-dimensional products. This paper determines the optimal accuracy and correctness of a 3D point cloud produced by a low-cost spherical camera in comparison to the 3D point cloud produced by laser scanner. The fisheye images were captured from a chessboard using a spherical camera, which was calibrated using the commercial Agisoft Metashape software (version 2.1). For this purpose, the results of different calibration methods are compared. In order to achieve data acquisition, multiple images were captured from the inside area of our case study structure (an underpass in Wiesbaden, Germany) in different configurations with the aim of optimal network design for camera location and orientation. The relative orientation was generated from multiple images obtained by removing the point cloud noise. For assessment purposes, the same scene was captured with a laser scanner to generate a metric comparison between the correspondence point cloud and the spherical one. The geometric features of both point clouds were analyzed for a complete geometric quality assessment. In conclusion, this study highlights the promising capabilities of low-cost spherical cameras for capturing and generating high-quality 3D point clouds by conducting a thorough analysis of the geometric features and accuracy assessments of the absolute and relative orientations of the generated clouds. This research demonstrated the applicability of spherical camera-based photogrammetry to challenging structures, such as underpasses with limited space for data acquisition, and achieved a 0.34 RMS re-projection error in the relative orientation step and a ground control point accuracy of nearly 1 mm. Compared to the laser scanner point cloud, the spherical point cloud reached an average distance of 0.05 m and acceptable geometric consistency.

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Section: Introductionmentioning

confidence: 99%

Quality Analysis of 3D Point Cloud Using Low-Cost Spherical Camera for Underpass Mapping

Rezaei,

Maier,

Arefi

2024

Sensors

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Safety of Radiological and Nuclear Quasi-Experiment Case Study

Smolarkiewicz

Zwęgliński

2023

ZN SGSP

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The aim of this paper is to present the results of the safety level measurement of radiological andnuclear (RN) quasi-experiment (q-E), which was carried out in 2016 in the Chernobyl ExclusionZone, in Pripyat town, as part of the End-user driven DEmo for cbrNe project (EDEN, FP7/2012-2016, under grant agreement no. 313077). The paper analyses the q-E executed in such a radiologicallycontaminated area of the town to verify a hypothesis that is formulated as follows: providing a safetyplan and the correct execution of the q-E, including using appropriate personal protective equipmentas well as following strict safety rules, guarantee an acceptable safety level for first responders takinga part in q-E conducted in Pripyat area as per relevant legal regulations. The experimental methodwith the quantitative measurements of effective gamma dose, using thermoluminescent dosimeters(TLD) and task related monitoring using electronic dosimeters (ED)was utilised. The individualeffective gamma doses for each q-E participant, for two days of the exposure, have been measured.The total effective gamma doses for each participant have been calculated and compared witheffective dose rates limits regulations. The received results proved that the assumed hypothesis waspositively verified from the international and Polish legal standpoint, which defines gamma radiationthresholds for exposed personnel and ordinary persons.

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Three-Dimensional Model and Orthophotomap's Quality Evaluation Towards Facilitating Aerial Reconnaissance of Flood Response Needs

Cited by 2 publications

References 0 publications

Quality Analysis of 3D Point Cloud Using Low-Cost Spherical Camera for Underpass Mapping

Quality Analysis of 3D Point Cloud Using Low-Cost Spherical Camera for Underpass Mapping

Safety of Radiological and Nuclear Quasi-Experiment Case Study

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