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Journal articles on the topic '3D Line sets'

Author: Grafiati

Published: 1 June 2024

Last updated: 31 July 2025

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1

Kamgar-Parsi, B., and B. Kamgar-Parsi. "Algorithms for matching 3d line sets." IEEE Transactions on Pattern Analysis and Machine Intelligence 26, no. 5 (2004): 582–93. http://dx.doi.org/10.1109/tpami.2004.1273930.

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Günther, Tobias, Christian Rössl, and Holger Theisel. "Hierarchical opacity optimization for sets of 3D line fields." Computer Graphics Forum 33, no. 2 (2014): 507–16. http://dx.doi.org/10.1111/cgf.12336.

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Kanzler, Mathias, Marc Rautenhaus, and Rudiger Westermann. "A Voxel-Based Rendering Pipeline for Large 3D Line Sets." IEEE Transactions on Visualization and Computer Graphics 25, no. 7 (2019): 2378–91. http://dx.doi.org/10.1109/tvcg.2018.2834372.

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Kamgar-Parsi, B., and B. Kamgar-Parsi. "Matching sets of 3D line segments with application to polygonal arc matching." IEEE Transactions on Pattern Analysis and Machine Intelligence 19, no. 10 (1997): 1090–99. http://dx.doi.org/10.1109/34.625109.

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Zhou, M., K. Y. Li, J. H. Wang, et al. "AUTOMATIC EXTRACTION OF POWER LINES FROM UAV LIDAR POINT CLOUDS USING A NOVEL SPATIAL FEATURE." ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences IV-2/W7 (September 16, 2019): 227–34. http://dx.doi.org/10.5194/isprs-annals-iv-2-w7-227-2019.

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<p><strong>Abstract.</strong> UAV LiDAR systems have unique advantage in acquiring 3D geo-information of the targets and the expenses are very reasonable; therefore, they are capable of security inspection of high-voltage power lines. There are already several methods for power line extraction from LiDAR point cloud data. However, the existing methods either introduce classification errors during point cloud filtering, or occasionally unable to detect multiple power lines in vertical arrangement. This paper proposes and implements an automatic power line extraction method bas

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Kurz, Franz, Seyed Azimi, Chun-Yu Sheu, and Pablo d’Angelo. "Deep Learning Segmentation and 3D Reconstruction of Road Markings Using Multiview Aerial Imagery." ISPRS International Journal of Geo-Information 8, no. 1 (2019): 47. http://dx.doi.org/10.3390/ijgi8010047.

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The 3D information of road infrastructures is growing in importance with the development of autonomous driving. In this context, the exact 2D position of road markings as well as height information play an important role in, e.g., lane-accurate self-localization of autonomous vehicles. In this paper, the overall task is divided into an automatic segmentation followed by a refined 3D reconstruction. For the segmentation task, we applied a wavelet-enhanced fully convolutional network on multiview high-resolution aerial imagery. Based on the resulting 2D segments in the original images, we propos

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Du, Xuan, Zong Bin Li, and Guo Hui Zhang. "Optimization of Printed Circuit Board Assignment and Component Allocation in Assembly Line." Advanced Materials Research 97-101 (March 2010): 2455–58. http://dx.doi.org/10.4028/www.scientific.net/amr.97-101.2455.

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The assembly optimization problem of multiple printed circuit board (PCB) tasks is analyzed, and an optimal model is formulated to balance the workload in decoupled PCB assembly line. Combined with polychromatic sets and genetic algorithm (GA), an integrated methodology is developed to solve the PCB assignment and component allocation simultaneously. Based on polychromatic sets theory, a 3D numerical contour matrix is presented to describe the characters of PCB, component and machine and the constraint of machine and process, and a constraint model is formulated. Constraint model guarantees th

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Zhao, Weizhao, Myron D. Ginsberg, and David W. Smith. "Three-Dimensional Quantitative Autoradiography by Disparity Analysis: Theory and Application to Image Averaging of Local Cerebral Glucose Utilization." Journal of Cerebral Blood Flow & Metabolism 15, no. 4 (1995): 552–65. http://dx.doi.org/10.1038/jcbfm.1995.69.

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Traditional autoradiographic image analysis has been restricted to the two-dimensional assessment of local cerebral glucose utilization (LCMRglc) or blood flow in individual brains. It is advantageous, however, to generate an entire three-dimensional (3D) data set and to develop the ability to map replicate images derived from multiple studies into the same 3D space, so as to generate average and standard deviation images for the entire series. We have developed a novel method, termed “disparity analysis,” for the alignment and mapping of autoradiographic images. We present the theory of this

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Lin, Li-Chieh J., Ray Y. Chuang, Chih-Heng Lu, Kuo-En Ching, and Chien-Liang Chen. "Derivation of 3D Coseismic Displacement Field from Integrated Azimuth and LOS Displacements for the 2018 Hualien Earthquake." Remote Sensing 16, no. 7 (2024): 1159. http://dx.doi.org/10.3390/rs16071159.

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A 3D surface deformation field for an earthquake can aid in understanding fault behaviors and earthquake mechanisms. However, SAR-based 3D surface deformation estimates are often limited by insufficient observations and hampered by various error sources. In this study, we demonstrate the derivation of a 3D coseismic displacement field from different InSAR processing algorithms. The azimuth displacements from Multiple Aperture Interferometry (MAI) and Pixel Offset Tracking (POT) were integrated to ensure reliable displacements at low coherent areas. The 3D displacement field was inverted pixel-

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An, Su-Yong, Lae-Kyoung Lee, and Se-Young Oh. "Line segment-based fast 3D plane extraction using nodding 2D laser rangefinder." Robotica 33, no. 08 (2014): 1751–74. http://dx.doi.org/10.1017/s0263574714000927.

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SUMMARYThree-dimensional (3D) data processing has applications in solving complex tasks such as object recognition, environment modeling, and robotic mapping and localization. Because using raw 3D data without preprocessing is very time-consuming, extraction of geometric features that describe the environment concisely is essential. In this sense, a plane can be a suitable geometric feature due to its simplicity of extraction and the abundance in indoor environments. This paper presents an online incremental plane extraction method using line segments for indoor environments. Our data collecti

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Mashonkina, Lyudmila. "Review: progress in NLTE calculations and their application to large data-sets." Proceedings of the International Astronomical Union 9, S298 (2013): 355–65. http://dx.doi.org/10.1017/s174392131300656x.

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AbstractOne of the major tasks in interpretation of data from large-scale stellar surveys is to determine the fundamental atmospheric parameters such as effective temperature, surface gravity, and metallicity. In most on-going and upcoming projects, they are derived spectroscopically, relying on classical one-dimensional (1D) model atmospheres and the assumption of LTE. This review discusses the present achievements and problems of non-local thermodynamic equilibrium (NLTE) line-formation calculations for FGK-type stars. The topics that are addressed include (i) the construction of comprehensi

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JOUVET, N., M. A. BOUNOUAR, S. ECOFFEY, et al. "RECENT DEVELOPMENTS ON 3D INTEGRATION OF METALLIC SET ONTO CMOS PROCESS FOR MEMORY APPLICATION." International Journal of Nanoscience 11, no. 04 (2012): 1240024. http://dx.doi.org/10.1142/s0219581x12400248.

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This work presents a nanodamascene process for a CMOS back-end-of-line fabrication of metallic single electron transistor(SET), together with the use of simulation tools for the development of a SET SRAM memory cell. We show room temperature electrical characterizations of SETs fabricated on CMOS with relaxed dimensions, and simulations of a SET SRAM memory cell. Using their physical characteristics achievable through the use of atomic layer deposition, it will be demonstrated that it has the potential to operate at temperature up to 398 K, and that power consumption is less than that of equiv

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Cheng, Jun, Ming Cheng, Yan Bin Lin, and Cheng Wang. "A Structure-Based Registration Method for Terrestrial Laser Scanning Data." Applied Mechanics and Materials 734 (February 2015): 608–16. http://dx.doi.org/10.4028/www.scientific.net/amm.734.608.

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This paper presents a novel structure-based registration method for terrestrial laser scanning (TLS) data. The line support region (LSR), which fits the 3D line segment, is adopted to describe the scene structure and reduce geometric complexity. Then we employ an evolution computation method to solve the optimization problem of global registration. Our method can be further enhanced by iterative closest points (ICP) or other local registration methods. We demonstrate the robustness of our algorithm on several point cloud sets with varying extent of overlap and degree of noise.

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Hoegner, L., S. Tuttas, Y. Xu, K. Eder, and U. Stilla. "EVALUATION OF METHODS FOR COREGISTRATION AND FUSION OF RPAS-BASED 3D POINT CLOUDS AND THERMAL INFRARED IMAGES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B3 (June 9, 2016): 241–46. http://dx.doi.org/10.5194/isprs-archives-xli-b3-241-2016.

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This paper discusses the automatic coregistration and fusion of 3d point clouds generated from aerial image sequences and corresponding thermal infrared (TIR) images. Both RGB and TIR images have been taken from a RPAS platform with a predefined flight path where every RGB image has a corresponding TIR image taken from the same position and with the same orientation with respect to the accuracy of the RPAS system and the inertial measurement unit. To remove remaining differences in the exterior orientation, different strategies for coregistering RGB and TIR images are discussed: (i) coregistra

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Hoegner, L., S. Tuttas, Y. Xu, K. Eder, and U. Stilla. "EVALUATION OF METHODS FOR COREGISTRATION AND FUSION OF RPAS-BASED 3D POINT CLOUDS AND THERMAL INFRARED IMAGES." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLI-B3 (June 9, 2016): 241–46. http://dx.doi.org/10.5194/isprsarchives-xli-b3-241-2016.

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This paper discusses the automatic coregistration and fusion of 3d point clouds generated from aerial image sequences and corresponding thermal infrared (TIR) images. Both RGB and TIR images have been taken from a RPAS platform with a predefined flight path where every RGB image has a corresponding TIR image taken from the same position and with the same orientation with respect to the accuracy of the RPAS system and the inertial measurement unit. To remove remaining differences in the exterior orientation, different strategies for coregistering RGB and TIR images are discussed: (i) coregistra

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Ismail, Rashad, Muhammad Javaid, and Hassan Zafar. "Metric-Based Fractional Dimension of Rotationally-Symmetric Line Networks." Symmetry 15, no. 5 (2023): 1069. http://dx.doi.org/10.3390/sym15051069.

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The parameter of distance plays an important role in studying the properties symmetric networks such as connectedness, diameter, vertex centrality and complexity. Particularly different metric-based fractional models are used in diverse fields of computer science such as integer programming, pattern recognition, and in robot navigation. In this manuscript, we have computed all the local resolving neighborhood sets and established sharp bounds of a metric-based fractional dimension called by the local fractional metric dimension of the rotationally symmetric line networks of wheel and prism net

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Hammad Mian, Syed, Mohammed Abdul Mannan, and Abdulrahman M. Al-Ahmari. "The influence of surface topology on the quality of the point cloud data acquired with laser line scanning probe." Sensor Review 34, no. 3 (2014): 255–65. http://dx.doi.org/10.1108/sr-01-2013-611.

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Purpose – The purpose of this paper is to investigate the influence of surface topology on the performance of laser line scanning probe and to suggest methodology for 3D digitization of specular surfaces. Design/methodology/approach – Two different molds, one having milled surface and the other with polished surface, were used to identify effect of surface characteristics on the performance of laser line scanning probe mounted on bridge-type coordinate measuring machine. The point cloud data acquisition of two surfaces was carried out using different combinations of laser scanning parameters.

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Zhan, Zhiwen, Fan Yang, Jixin Jiang, et al. "A Scaled Monocular 3D Reconstruction Based on Structure from Motion and Multi-View Stereo." Electronics 13, no. 19 (2024): 3943. http://dx.doi.org/10.3390/electronics13193943.

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Three-dimensional digital modeling at actual scales is essential for digitally preserving cultural relics. While 3D reconstruction using a monocular camera offers a cost-effective solution, the lack of scale information in the resulting models limits their suitability for geometric measurements. Objects with monotonous textures, such as batteries, pose additional challenges due to insufficient feature points, increasing positional uncertainty. This article proposes a method incorporating point and line features to address the scale ambiguity in multi-view 3D reconstruction using monocular came

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Li, Lin, Kelvin C. P. Wang, Qiang Li, Wenting Luo, and Jiangang Guo. "Impacts of Sample Size on Calculation of Pavement Texture Indicators with 1mm 3D Surface Data." Periodica Polytechnica Transportation Engineering 46, no. 1 (2017): 42. http://dx.doi.org/10.3311/pptr.9587.

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The emerging 1mm resolution 3D data collection technology is capable of covering the entire pavement surface, and provides more data sets than traditional line-of-sight data collection systems. As a result, quantifying the impact of sample size including sample width and sample length on the calculation of pavement texture indicators is becoming possible. In this study, 1mm 3D texture data are collected and processed at seven test sites using the PaveVision3D Ultra system. Analysis of Variance (ANOVA) test and linear regression models are developed to investigate various sample length and widt

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Li, Luping, Jian Chen, Xing Su, and Ahsan Nawaz. "Advanced-Technological UAVs-Based Enhanced Reconstruction of Edges for Building Models." Buildings 12, no. 8 (2022): 1248. http://dx.doi.org/10.3390/buildings12081248.

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Accurate building models are widely used in the construction industry in the digital era. UAV cameras combined with image-based reconstruction provide a low-cost technology for building modeling. Most existing reconstruction methods operate on point clouds, while massive points reduce computational efficiency, and the accumulated error of point position often distorts building edges. This paper introduces an innovative 3D reconstruction method, Edge3D, that recovers building edges in the form of 3D lines. It employs geometry constraints and progressive screening technology to improve the robus

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Li, Shengpu, and Yize Sun. "Predicting Ink Transfer Rate of 3D Additive Printing Using EGBO Optimized Least Squares Support Vector Machine Model." Mathematical Problems in Engineering 2020 (September 25, 2020): 1–12. http://dx.doi.org/10.1155/2020/8642430.

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Ink transfer rate (ITR) is a reference index to measure the quality of 3D additive printing. In this study, an ink transfer rate prediction model is proposed by applying the least squares support vector machine (LSSVM). In addition, enhanced garden balsam optimization (EGBO) is used for selection and optimization of hyperparameters that are embedded in the LSSVM model. 102 sets of experimental sample data have been collected from the production line to train and test the hybrid prediction model. Experimental results show that the coefficient of determination (R2) for the introduced model is eq

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Bentley, Laurence R., and Mehran Gharibi. "Two‐ and three‐dimensional electrical resistivity imaging at a heterogeneous remediation site." GEOPHYSICS 69, no. 3 (2004): 674–80. http://dx.doi.org/10.1190/1.1759453.

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Geometrically complex heterogeneities at a decommissioned sour gas plant could not be adequately characterized with drilling and 2D electrical resistivity surveys alone. In addition, 2D electrical resistivity imaging profiles produced misleading images as a result of out‐of‐plane resistivity anomalies and violation of the 2D assumption. Accurate amplitude and positioning of electrical conductivity anomalies associated with the subsurface geochemical distribution were required to effectively analyze remediation alternatives. Forward and inverse modeling and field examples demonstrated that 3D r

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Jia, Xin, Qing Zhu, Xuming Ge, Ruifeng Ma, Daiwei Zhang, and Tao Liu. "Robust Guardrail Instantiation and Trajectory Optimization of Complex Highways Based on Mobile Laser Scanning Point Clouds." Photogrammetric Engineering & Remote Sensing 89, no. 3 (2023): 151–61. http://dx.doi.org/10.14358/pers.22-00100r2.

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As a basic asset of highways, guardrails are essential objects in the digital modeling of highways. Therefore, generating the vectorial 3D trajectory of a guardrail from mobile laser scanning (MLS) point clouds is required for real digital modeling. However, most methods limit straight-line guardrails without considering the continuity and accuracy of the guardrails in turnoff and bend areas; thus, a completed 3D trajectory of a guardrail is not available. We use RANDLA-Net for extracting guardrails as preprocessing of MLS point clouds. We perform a region growth strategy based on linear const

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Manzi, Musa S. D., Mark A. S. Gibson, Kim A. A. Hein, Nick King, and Raymond J. Durrheim. "Application of 3D seismic techniques to evaluate ore resources in the West Wits Line goldfield and portions of the West Rand goldfield, South Africa." GEOPHYSICS 77, no. 5 (2012): WC163—WC171. http://dx.doi.org/10.1190/geo2012-0133.1.

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As expensive as 3D seismic reflection surveys are, their high cost is justified by improved imaging of certain ore horizons in some of the Witwatersrand basin gold mines. The merged historical 3D seismic reflection data acquired for Kloof and South Deep mines forms an integral part of their Ventersdorp Contact Reef mine planning and development programme. The recent advances in 3D seismic technology have motivated the reprocessing and reinterpretation of the old data sets using the latest algorithms, therefore significantly increasing the signal-to-noise ratio of the data. In particular, the p

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Tomás, R., A. Riquelme, M. Cano, et al. "Evaluación de la estabilidad de taludes rocosos a partir de nubes de puntos 3D obtenidas con un vehículo aéreo no tripulado." Revista de Teledetección, no. 55 (June 23, 2020): 1. http://dx.doi.org/10.4995/raet.2020.13168.

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<p>In this work, a methodology proposed for the semiautomatic identification of discontinuities and the later kinematic and stability analyses is described through its application to a rocky railway line cutting. Image acquisition has been performed using a six-rotors unmanned aerial vehicle for their subsequent photogrammetric restitution by means of the digital technique Structure from Motion (SfM) by means of the software Agisoft Metashape that provides a 3D point cloud. From this 3D point cloud, four discontinuity sets (J<sub>1</sub>, J<sub>2</sub>, J<sub&g

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Roberge, Danny, Alain Beauchamp, and Serge Lévesque. "Objective Identification of Bullets Based on 3D Pattern Matching and Line Counting Scores." International Journal of Pattern Recognition and Artificial Intelligence 33, no. 11 (2019): 1940021. http://dx.doi.org/10.1142/s0218001419400214.

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In firearm identification, a firearm examiner looks at a pair of fired bullets or cartridge cases using a comparison microscope and determines from this visual analysis if they were both fired from the same firearm. In the particular case of fired bullets, the individual firearm signature takes the form of a striated pattern. Over the time, the firearm examiner’s community developed two distinct approaches for bullet identification: pattern matching and line counting. More recently, the emergence of technology enabling the capture of surface topographies down to a submicron depth resolution ha

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Hua, Lisa L., and Takashi Mikawa. "Mitotic antipairing of homologous and sex chromosomes via spatial restriction of two haploid sets." Proceedings of the National Academy of Sciences 115, no. 52 (2018): E12235—E12244. http://dx.doi.org/10.1073/pnas.1809583115.

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Pairing homologous chromosomes is required for recombination. However, in nonmeiotic stages it can lead to detrimental consequences, such as allelic misregulation and genome instability, and is rare in human somatic cells. How mitotic recombination is prevented—and how genetic stability is maintained across daughter cells—is a fundamental, unanswered question. Here, we report that both human and mouse cells impede homologous chromosome pairing by keeping two haploid chromosome sets apart throughout mitosis. Four-dimensional analysis of chromosomes during cell division revealed that a haploid c

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Wang, Zhiheng, Rui Zhang, and Yuxin Liu. "3D Coseismic Deformation Field and Source Parameters of the 2017 Iran-Iraq Mw7.3 Earthquake Inferred from DInSAR and MAI Measurements." Remote Sensing 11, no. 19 (2019): 2248. http://dx.doi.org/10.3390/rs11192248.

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The coseismic slip on the main fault related to the 2017 Iran-Iraq Mw7.3 earthquake has been investigated by previous studies using DInSAR (differential interferometric synthetic aperture radar) ground deformation measurements. However, DInSAR observation is not sensitive to the ground deformation in the along-track (AT) direction. Therefore, only the one-dimensional (1D) DInSAR coseismic deformation field measurements, derived in the LOS (line-of-sight) direction of radar, was applied in source parameters estimation. To further improve the accuracy of the fault slip inversion, the 3D (three-d

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Martorana, Raffaele, and Patrizia Capizzi. "Evaluation of Artifacts and Misinterpretation in 2D Electrical Resistivity Tomography Caused by Three-Dimensional Resistive Structures of Regular or Irregular Shapes." Applied Sciences 13, no. 3 (2023): 2015. http://dx.doi.org/10.3390/app13032015.

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Electrical resistivity tomography (ERT) is a well-known geophysical method applied to geological, hydrogeological and geoenvironmental research. To date, 2D ERT is still used much more than 3D ERT, thanks to its greater immediacy, survey speed and lower complexity in processing and inversion. However, the assumption of two-dimensionality of the underground structures can mean that the effects of 3D structures on the 2D ERT can sometimes lead to gross errors in interpretation. This work aims to evaluate these effects by testing synthetic and experimental models. Numerical simulations are perfor

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Ahmed, Naseer, Sankar Venkataraman, Kate Johnson, Keith Sutherland, and Shaun K. Loewen. "Does Motion Assessment With 4-Dimensional Computed Tomographic Imaging for Non–Small Cell Lung Cancer Radiotherapy Improve Target Volume Coverage?" Clinical Medicine Insights: Oncology 11 (January 1, 2017): 117955491769846. http://dx.doi.org/10.1177/1179554917698461.

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Introduction: Modern radiotherapy with 4-dimensional computed tomographic (4D-CT) image acquisition for non–small cell lung cancer (NSCLC) captures respiratory-mediated tumor motion to provide more accurate target delineation. This study compares conventional 3-dimensional (3D) conformal radiotherapy (3DCRT) plans generated with standard helical free-breathing CT (FBCT) with plans generated on 4D-CT contoured volumes to determine whether target volume coverage is affected. Materials and methods: Fifteen patients with stage I to IV NSCLC were enrolled in the study. Free-breathing CT and 4D-CT d

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Han, Tian, Davood Shojaei, Paul Fitzpatrick, Taka Sakurai, and Jamie Evans. "Urban 5G MmWave Networks: Line-of-Sight Probabilities and Optimal Site Locations." Journal of Telecommunications and the Digital Economy 11, no. 1 (2023): 107–30. http://dx.doi.org/10.18080/jtde.v11n1.640.

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In this work, we implemented line-of-sight (LoS) ray tracing functionality to investigate problems in millimetre-wave propagation modelling and network planning in 3D city model environments. First, we validated an existing LoS propagation probability model expressed as an exponential rule with the link distance. By fitting ray tracing simulation results under different scenarios to the model, the relationships between key parameters in the model and factors including the building density and the transmitter height were qualitatively analysed. Next, we developed a network planning framework fo

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Ammer, Regina, Ulrich Rüde, Matthias Markl, Vera Jüchter, and Carolin Körner. "Validation experiments for LBM simulations of electron beam melting." International Journal of Modern Physics C 25, no. 12 (2014): 1441009. http://dx.doi.org/10.1142/s0129183114410095.

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This paper validates three-dimensional (3D) simulation results of electron beam melting (EBM) processes by comparing experimental and numerical data. The physical setup is presented which is discretized by a 3D thermal lattice Boltzmann method (LBM). An experimental process window is used for the validation depending on the line energy injected into the metal powder bed and the scan velocity of the electron beam. In the process window, the EBM products are classified into the categories, porous, good and swelling, depending on the quality of the surface. The same parameter sets are used to gen

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Zhou, Xiang, Hai Wang, and Zhong You. "Design of three-dimensional origami structures based on a vertex approach." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 471, no. 2181 (2015): 20150407. http://dx.doi.org/10.1098/rspa.2015.0407.

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Origami geometric design is fundamental to many engineering applications of origami structures. This paper presents a new method for the design of three-dimensional (3D) origami structures suitable for engineering use. Using input point sets specified, respectively, in the x − z and y − z planes of a Cartesian coordinate system, the proposed method generates the coordinates of the vertices of a folded origami structure, whose fold lines are then defined by straight line segments each connecting two adjacent vertices. It is mathematically guaranteed that the origami structures obtained by this

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Lee, Lilian L., Natascha M. Förster Schreiber, Sedona H. Price, et al. "Disk Kinematics at High Redshift: DysmalPy’s Extension to 3D Modeling and Comparison with Different Approaches." Astrophysical Journal 978, no. 1 (2024): 14. https://doi.org/10.3847/1538-4357/ad90b5.

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Abstract Spatially resolved emission-line kinematics are invaluable for investigating fundamental galaxy properties and have become increasingly accessible for galaxies at z ≳0.5 through sensitive near-infrared imaging spectroscopy and millimeter interferometry. Kinematic modeling is at the core of the analysis and interpretation of such data sets, which at high z present challenges due to the lower signal-to-noise ratio (S/N) and resolution compared to the data of local galaxies. We present and test the 3D fitting functionality of DysmalPy, examining how well it recovers the intrinsic disk ro

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Finn, Anthony, Stefan Peters, Pankaj Kumar, and Jim O’Hehir. "Automated Georectification, Mosaicking and 3D Point Cloud Generation Using UAV-Based Hyperspectral Imagery Observed by Line Scanner Imaging Sensors." Remote Sensing 15, no. 18 (2023): 4624. http://dx.doi.org/10.3390/rs15184624.

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Hyperspectral sensors mounted on unmanned aerial vehicles (UAV) offer the prospect of high-resolution multi-temporal spectral analysis for a range of remote-sensing applications. However, although accurate onboard navigation sensors track the moment-to-moment pose of the UAV in flight, geometric distortions are introduced into the scanned data sets. Consequently, considerable time-consuming (user/manual) post-processing rectification effort is generally required to retrieve geometrically accurate mosaics of the hyperspectral data cubes. Moreover, due to the line-scan nature of many hyperspectr

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Yan, Jiang, Li Qiang, Wang Guanyao, Wang Ben, and Deng Wei. "Monitoring Method of Transmission Line Breaking Prevention Based on Deep Learning." E3S Web of Conferences 252 (2021): 01024. http://dx.doi.org/10.1051/e3sconf/202125201024.

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With the rapid development of the national economy, the national power consumption level continues to increase, which puts forward higher requirements on the power supply guarantee capacity of the power grid system. The distribution range of the transmission line is wide and densely, most lines are exposed to the unguarded field without any shielding or protective measures, which are vulnerable to man-made destruction or natural disasters. Therefore, it is very important for the early monitoring and prevention of the external force breaking of the transmission lines. The method for preventing

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Huang, Zhaoguo, Junlan Chen, Xiucheng Guo, and Changxi Ma. "Optimization Method of Transfer Streamlines in Integrated Passenger Hubs Based on 3D Spatial Perspective." Sustainability 15, no. 10 (2023): 8296. http://dx.doi.org/10.3390/su15108296.

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To optimize the functional space layout of various transportation modes of the integrated passenger transport hub, and improve the transfer efficiency and service quality of the hub, a quantitative analysis of the transfer flow lines of the integrated passenger hub is carried out. The research clarifies the layout factors of the functional areas of the “get on and drop off areas” for each mode of transportation, generates a candidate set of the placement of each functional area, and determines the priority ranking of the candidate sets and the transfer starting and end locations. Based on the

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Wu, Jin Liang, and Ji He. "Determination of Volumetric Joint Count Based on 3D Fracture Network and its Application in Engineering." Applied Mechanics and Materials 580-583 (July 2014): 907–11. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.907.

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Volumetric joint countis an important parameter to evaluate the development of fractures. It is a fundamental representative for the strength and permeability of rock masses. However, cannot be directly measured in field. In this study, an indirect method is applied for its estimation. The main procedures are as follows: firstly, the volumetric joint frequencyis assumed for th fracture set, and then a series of 3D stochastic discrete fracture networks (DFNs) are generated using the Monte Carlo method according to; secondly, a survey line is drawn perpendicular to the fracture set in the each f

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Ruiu, Jeremy, Guillaume Caumon, and Sophie Viseur. "Semiautomatic interpretation of 3D sedimentological structures on geologic images: An object-based approach." Interpretation 3, no. 3 (2015): SX63—SX74. http://dx.doi.org/10.1190/int-2015-0004.1.

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The characterization of sedimentary structures is an important step in constructing quantitative models of sedimentary deposits from digital images, such as 3D seismic data, satellite images, or digital outcrops. However, the interpretation of these structures generally consists of tedious line pickings followed by surface modeling to define geobodies. Automatic geobody extraction is an alternative, but it is sensitive to image noise, and it does not account for prior sedimentary knowledge. We decided to combine minimal picking by an interpreter with object-guided image processing and optimiza

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Dean, Jonathan William, Scott Neil Thompson та Christopher Thomas Chantler. "Ab Initio Manganese Kα and Kβ Energy Eigenvalues, Shake-Off Probabilities, Auger Rates, with Convergence Tests". Molecules 29, № 17 (2024): 4199. http://dx.doi.org/10.3390/molecules29174199.

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This work presents ab initio calculations for the Kα spectrum of manganese (Z = 25, [Ar]3d54s2), a highly complex system due to the five open orbitals in the 3d shell. The spectrum is composed of the canonical diagram line [1s]→[2p] and shake-off satellite lines [1snl]→[2pnl] (nl∈{2s,2p,3s,3p,3d,4s}), where square brackets denote a hole state. The multiconfiguration Dirac–Hartree–Fock method with the active set approach provides the initial and final atomic wavefunctions. Results are presented as energy eigenvalue spectra for the diagram and satellite transitions. The calculated wavefunctions

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Jolly, Jean-Baptiste, Kirsten K. Knudsen, and Flora Stanley. "linestacker: a spectral line stacking tool for interferometric data." Monthly Notices of the Royal Astronomical Society 499, no. 3 (2020): 3992–4010. http://dx.doi.org/10.1093/mnras/staa2908.

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ABSTRACT linestacker is a new open access and open source tool for stacking of spectral lines in interferometric data. linestacker is an ensemble of casa tasks, and can stack both 3D cubes or already extracted spectra. The algorithm is tested on increasingly complex simulated data sets, mimicking Atacama Large Millimeter/submillimeter Array, and Karl G. Jansky Very Large Array observations of [C ii] and CO(3–2) emission lines, from z ∼ 7 and z ∼ 4 galaxies, respectively. We find that the algorithm is very robust, successfully retrieving the input parameters of the stacked lines in all cases wi

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Incrapera, Angela K., Chung How Kau, Jeryl D. English, Kathleen McGrory, and David M. Sarver. "Soft Tissue Images from Cephalograms Compared With Those from a 3D Surface Acquisition System." Angle Orthodontist 80, no. 1 (2010): 58–64. http://dx.doi.org/10.2319/111408-583.1.

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Abstract Objective: To assess whether 2D cephalometrics is comparable with 3D imaging devices and whether 3D technology could replace traditional 2D image capture in posttreatment evaluation. Materials and Methods: The study is a prospective evaluation of superimposition techniques obtained from a cohort of 40 patients who underwent orthognathic surgery in a private practice environment. Surgical records were obtained from lateral cephalometric radiographs taken by a Kodak 8000C machine, and the 3D images were obtained from the 3dMD stereo photogrammetric camera capture system. Pre- and postla

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Yan, Rui-Jun, Jing Wu, Ji Yeong Lee, and Chang-Soo Han. "Representation of 3D Environment Map Using B-Spline Surface with Two Mutually Perpendicular LRFs." Mathematical Problems in Engineering 2015 (2015): 1–14. http://dx.doi.org/10.1155/2015/690310.

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This paper proposes a map representation method of three-dimensional (3D) environment by using B-spline surfaces, which are first used to describe large environment in 3D map construction research. Initially, a 3D point cloud map is constructed based on extracted line segments with two mutually perpendicular 2D laser range finders (LRFs). Then two types of accumulated data sets are separated from the point cloud map according to different types of robot movements, continuous translation and continuous rotation. To express the environment more accurately, B-spline surface with covariance matrix

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Purusothaman, Abimanyu, Abderrahmane Baïri, and Nagarajan Nithyadevi. "3D natural convection on a horizontal and vertical thermally active plate in a closed cubical cavity." International Journal of Numerical Methods for Heat & Fluid Flow 26, no. 8 (2016): 2528–42. http://dx.doi.org/10.1108/hff-08-2015-0341.

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Purpose The purpose of this paper is to examine numerically the natural convection heat transfer in a cubical cavity induced by a thermally active plate. Effects of the plate size and its orientation with respect to the gravity vector on the convective heat transfer and the flow structures inside the cavity are studied and highlighted. Design/methodology/approach The numerical code is based on the finite volume method with semi-implicit method for pressure-linked equation algorithm. The convective and diffusive terms in momentum equations are handled by adopting the power law scheme. Finally,

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Abdullah, S. M., M. Awrangjeb, and G. Lu. "LiDAR Segmentation using Suitable Seed Points for 3D Building Extraction." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-3 (August 11, 2014): 1–8. http://dx.doi.org/10.5194/isprsarchives-xl-3-1-2014.

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Effective building detection and roof reconstruction has an influential demand over the remote sensing research community. In this paper, we present a new automatic LiDAR point cloud segmentation method using suitable seed points for building detection and roof plane extraction. Firstly, the LiDAR point cloud is separated into "ground" and "non-ground" points based on the analysis of DEM with a height threshold. Each of the non-ground point is marked as coplanar or non-coplanar based on a coplanarity analysis. Commencing from the maximum LiDAR point height towards the minimum, all the LiDAR po

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Bétaille, David, François Peyret, and Maxime Voyer. "Applying Standard Digital Map Data in Map-aided, Lane-level GNSS Location." Journal of Navigation 68, no. 5 (2015): 827–47. http://dx.doi.org/10.1017/s0373463315000132.

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Urban positioning using the Global Positioning System (GPS) is challenging because of multipath. Urban canyons limit open sky visibility, and cause signal reflection and diffraction, resulting in significant satellite range measurement errors. The investigations reported here have been carried out in a French project calledInturb(an acronym derived from integrity and urban positioning). So far, the project has had two phases: first, a simple Three-Dimensional (3D) geometrical city modelling, called “Urban Trench”, has been developed and engineered manually from data sets collected in different

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Haase, I., P. Gläser, and J. Oberst. "BUNDLE ADJUSTMENT OF SPACEBORNE DOUBLE-CAMERA PUSH-BROOM IMAGERS AND ITS APPLICATION TO LROC NAC IMAGERY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W13 (June 5, 2019): 1397–404. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w13-1397-2019.

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<p><strong>Abstract.</strong> The TU Berlin group of the Lunar Reconnaissance Orbiter Camera (LROC) team has implemented a Bundle Adjustment (BA) for spaceborne multi-lenses line scan imagers, by rigorously modeling the geometric properties of the image acquisition. The BA was applied to stereo image sets of the LROC Narrow Angle Camera (NAC) and first results show, that the overall geometry of the stereo models were significantly improved. Ray intersection accuracies of initially up to several meters were homogenized within the integrated stereo models and improved to 0.14&a

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Parpala, Radu Constantin, Diana Popescu, and Cristina Pupaza. "Infill parameters influence over the natural frequencies of ABS specimens obtained by extrusion-based 3D printing." Rapid Prototyping Journal 27, no. 6 (2021): 1273–85. http://dx.doi.org/10.1108/rpj-05-2020-0110.

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Purpose The mechanical performances of 3D-printed parts are influenced by the manufacturing variables. Many studies experimentally evaluate the impact of the process parameters on specimens’ static and dynamic behavior with the aim of tailoring the mechanical response of the prints. However, this experimental approach is hampered by the very large number of parameters, 3D printers and materials, the development of computer simulation models being thus required. In the context, this study aims to fill a gap by experimentally investigating the influence of infill related parameters over the vibr

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Pu, S., L. Xie, M. Ji, et al. "REAL-TIME POWERLINE CORRIDOR INSPECTION BY EDGE COMPUTING OF UAV LIDAR DATA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W13 (June 4, 2019): 547–51. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w13-547-2019.

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<p><strong>Abstract.</strong> This paper presents an innovative power line corridor inspection approach using UAV LiDAR edge computing and 4G real real-time transmission. First, sample point clouds of power towers are manually classified and decomposed into components according to five mainstream tower types: T type, V type, n type, I type and owl head type. A deep learning AI agent, named “Tovos Age Agent” internally, is trained by supervised deep learning the sample data sets under a 3D CNN framework. Second, laser points of power line corridors are simultaneously classifie

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Zhang, Zhuang, Rujin Zhao, Enhai Liu, Kun Yan, and Yuebo Ma. "A Convenient Calibration Method for LRF-Camera Combination Systems Based on a Checkerboard." Sensors 19, no. 6 (2019): 1315. http://dx.doi.org/10.3390/s19061315.

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In this paper, a simple and easy high-precision calibration method is proposed for the LRF-camera combined measurement system which is widely used at present. This method can be applied not only to mainstream 2D and 3D LRF-cameras, but also to calibrate newly developed 1D LRF-camera combined systems. It only needs a calibration board to record at least three sets of data. First, the camera parameters and distortion coefficients are decoupled by the distortion center. Then, the spatial coordinates of laser spots are solved using line and plane constraints, and the estimation of LRF-camera extri

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