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Journal articles on the topic 'Handheld laser scanning'

Author: Grafiati

Published: 30 June 2021

Last updated: 29 July 2025

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1

DuBose, Theodore, Derek Nankivil, Francesco LaRocca, et al. "Handheld adaptive optics scanning laser ophthalmoscope." Optica 5, no. 9 (2018): 1027. http://dx.doi.org/10.1364/optica.5.001027.

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Hagan, Kristen, Theodore DuBose, David Cunefare, et al. "Multimodal handheld adaptive optics scanning laser ophthalmoscope." Optics Letters 45, no. 17 (2020): 4940. http://dx.doi.org/10.1364/ol.402392.

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Brusak, Ivan, Krzysztof Bakuła, and Nataliia Savchuk. "GEODESY, CARTOGRAPHY, AND AERIAL PHOTOGRAPHY." GEODESY, CARTOGRAPHY, AND AERIAL PHOTOGRAPHY 98,2023, no. 98 (2023): 15–23. http://dx.doi.org/10.23939/istcgcap2023.98.015.

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Research presents modern technologies of 3D measurements in shipbuilding production parts. Special template of the keel detail was made for the research. The detail measurements with a laser tracker, laser scanning, industrial photogrammetry and handheld scanning are performed. Leica Absolute Tracker AT960-LR was used for Laser tracker measurements. Laser scanning was performed with Z+F Imager 5010. Nikon D2Xs photo camera was used for Industrial photogrammetry. Handheld scanner DPI-7 from DotProduct was also used for 3D measurements of the details. All collected data were imported into 3DResh

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Komissarov, A. V., A. V. Remizov, M. M. Shlyakhova, and K. K. Yambaev. "Handheld Laser Scanner Research." Geodesy and Cartography 952, no. 10 (2019): 47–54. http://dx.doi.org/10.22389/0016-7126-2019-952-10-47-54.

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The authors consider hand-held laser scanners, as a new photogrammetric tool for obtaining three-dimensional models of objects. The principle of their work and the newest optical systems based on various sensors measuring the depth of space are described in detail. The method of simultaneous navigation and mapping (SLAM) used for combining single scans into point cloud is outlined. The formulated tasks and methods for performing studies of the DotProduct (USA) hand-held laser scanner DPI?8X based on a test site survey are presented. The accuracy requirements for determining the coordinates of

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Bleier, M., and A. Nüchter. "TOWARDS ROBUST SELF-CALIBRATION FOR HANDHELD 3D LINE LASER SCANNING." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W8 (November 13, 2017): 31–36. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w8-31-2017.

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This paper studies self-calibration of a structured light system, which reconstructs 3D information using video from a static consumer camera and a handheld cross line laser projector. Intersections between the individual laser curves and geometric constraints on the relative position of the laser planes are exploited to achieve dense 3D reconstruction. This is possible without any prior knowledge of the movement of the projector. However, inaccurrately extracted laser lines introduce noise in the detected intersection positions and therefore distort the reconstruction result. Furthermore, whe

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Sadeghi, F., H. Arefi, A. Fallah, and M. Hahn. "3D BUILDING FAÇADE RECONSTRUCTION USING HANDHELD LASER SCANNING DATA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-1-W5 (December 11, 2015): 625–30. http://dx.doi.org/10.5194/isprsarchives-xl-1-w5-625-2015.

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3D The three dimensional building modelling has been an interesting topic of research for decades and it seems that photogrammetry methods provide the only economic means to acquire truly 3D city data. According to the enormous developments of 3D building reconstruction with several applications such as navigation system, location based services and urban planning, the need to consider the semantic features (such as windows and doors) becomes more essential than ever, and therefore, a 3D model of buildings as block is not any more sufficient. To reconstruct the façade elements completely, we e

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Bubniak, Ihor, Andrii Bubniak, Anatolii Vivat, Mariia Oliinyk, Taras Marko, and Kateryna Boiko. "LASER SCANNING OF MLYNKY CAVE: PRELIMINARY RESULTS." SCIENTIFIC PAPERS OF DONNTU Series: “The Mining and Geology”, no. 1(31)-2(32) (2024): 104–10. https://doi.org/10.31474/2073-9575-2024-1(31)-2(32)-104-110.

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Objective. To investigate Mlynky Cave using advanced laser scanning technologies to create a high-precision three-dimensional model, enabling detailed examination of its geological features, morphology, and spatial structure. Methods. Data collection was conducted using the handheld laser scanner STONEX X120 GO, which offers high accuracy and measurement speed. The process encompassed scanner preparation, execution of scans, generation of point clouds, their processing, and visualization in the form of a 3D model. Results. A detailed 3D model of a section of the cave was obtained with a resolu

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Muhojoki, Jesse, Daniella Tavi, Eric Hyyppä, et al. "Benchmarking Under- and Above-Canopy Laser Scanning Solutions for Deriving Stem Curve and Volume in Easy and Difficult Boreal Forest Conditions." Remote Sensing 16, no. 10 (2024): 1721. http://dx.doi.org/10.3390/rs16101721.

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The use of mobile laser scanning for mapping forests has scarcely been studied in difficult forest conditions. In this paper, we compare the accuracy of retrieving tree attributes, particularly diameter at breast height (DBH), stem curve, stem volume, and tree height, using six different laser scanning systems in a managed natural boreal forest. These compared systems operated both under the forest canopy on handheld and unmanned aerial vehicle (UAV) platforms and above the canopy from a helicopter. The complexity of the studied forest sites ranged from easy to difficult, and thus, this is the

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Yıldırım, I. D., B. Sarioglu, and Y. D. Gokdel. "3D Printed Head for a Handheld Laser Scanning Confocal Microscope." Instruments and Experimental Techniques 64, no. 2 (2021): 301–7. http://dx.doi.org/10.1134/s0020441221010176.

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10

LaRocca, Francesco, Derek Nankivil, Sina Farsiu, and Joseph A. Izatt. "Handheld simultaneous scanning laser ophthalmoscopy and optical coherence tomography system." Biomedical Optics Express 4, no. 11 (2013): 2307. http://dx.doi.org/10.1364/boe.4.002307.

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11

Duan, X., H. Yang, Q. Hu, X. Wu, and P. Zhao. "A SLAM METHOD FOR HANDHELD HEMISPHERICAL VIEW LASER SCANNING SYSTEM." ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences X-3/W1-2022 (October 27, 2022): 37–43. http://dx.doi.org/10.5194/isprs-annals-x-3-w1-2022-37-2022.

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Abstract. In view of the problem that some multi-line light detection and ranging (LiDAR) scans a small field of view in the vertical direction, a framework that uses an integrated handheld hemispherical view LiDAR and inertial measurement unit (IMU) scanning system for simultaneous localization and mapping (SLAM) is proposed. For the structural characteristics of the hemispherical view LiDAR scan lines, a ground segmentation pre-processing module based on seed points is designed. The segmented ground points are downsampled to eliminate redundant vertical constraints. The IMU data and the pre-

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Wang, Xiaomin, Zexiao Xie, Kun Wang, and Liqin Zhou. "Research on a Handheld 3D Laser Scanning System for Measuring Large-Sized Objects." Sensors 18, no. 10 (2018): 3567. http://dx.doi.org/10.3390/s18103567.

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A handheld 3D laser scanning system is proposed for measuring large-sized objects on site. This system is mainly composed of two CCD cameras and a line laser projector, in which the two CCD cameras constitute a binocular stereo vision system to locate the scanner’s position in the fixed workpiece coordinate system online, meanwhile the left CCD camera and the laser line projector constitute a structured light system to get the laser lines modulated by the workpiece features. The marked points and laser line are both obtained in the coordinate system of the left camera in each moment. To get th

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Gejdoš, Miloš, Martin Lieskovský, and Michal Ferenčík. "Analysis and comparison of methods for determining small piles of wood chips using laser scanning technology." BioResources 20, no. 1 (2025): 1807–19. https://doi.org/10.15376/biores.20.1.1807-1819.

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The monitoring of forest biomass stock volumes in larger operations is typically conducted irregularly, either by tracking cargo arrivals or by using simple manual measurement methods. The objective of this study was to assess the accuracy of smart methods based on laser scanning technology, integrated into mobile phones and a handheld laser scanner, for measuring smaller piles of forest chips. For the experiment, a total of 50 m³ of fiberwood logs were chipped and distributed into four piles. The smart solutions selected for laser scanning of forest biomass in this study were the Stonex Geosl

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Gollob, Christoph, Tim Ritter, and Arne Nothdurft. "Comparison of 3D Point Clouds Obtained by Terrestrial Laser Scanning and Personal Laser Scanning on Forest Inventory Sample Plots." Data 5, no. 4 (2020): 103. http://dx.doi.org/10.3390/data5040103.

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In forest inventory, trees are usually measured using handheld instruments; among the most relevant are calipers, inclinometers, ultrasonic devices, and laser range finders. Traditional forest inventory has been redesigned since modern laser scanner technology became available. Laser scanners generate massive data in the form of 3D point clouds. We have developed a novel methodology to provide estimates of the tree positions, stem diameters, and tree heights from these 3D point clouds. This dataset was made publicly accessible to test new software routines for the automatic measurement of fore

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Wang, Meilian, Man Sing Wong, and Sawaid Abbas. "Tropical Species Classification with Structural Traits Using Handheld Laser Scanning Data." Remote Sensing 14, no. 8 (2022): 1948. http://dx.doi.org/10.3390/rs14081948.

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Information about tree species plays a pivotal role in sustainable forest management. Light detection and ranging (LiDAR) technology has demonstrated its potential to obtain species information using the structural features of trees. Several studies have explored the structural properties of boreal or temperate trees from terrestrial laser scanning (TLS) data and applied them to species classification, but the study of structural properties of tropical trees for species classification is rare. Compared to conventional static TLS, handheld laser scanning (HLS) is able to effectively capture poi

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Patil, Chetan A., Christopher L. Arrasmith, Mark A. Mackanos, David L. Dickensheets, and Anita Mahadevan-Jansen. "A handheld laser scanning confocal reflectance imaging–confocal Raman microspectroscopy system." Biomedical Optics Express 3, no. 3 (2012): 488. http://dx.doi.org/10.1364/boe.3.000488.

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LaRocca, Francesco, Derek Nankivil, Sina Farsiu, and Joseph A. Izatt. "True color scanning laser ophthalmoscopy and optical coherence tomography handheld probe." Biomedical Optics Express 5, no. 9 (2014): 3204. http://dx.doi.org/10.1364/boe.5.003204.

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Du, Wenbo, Xingxing Li, Li Jiang, Fei Lv, and Chang’an Hu. "Research on real-time scanning reconstruction control technology of 3D scene." Journal of Physics: Conference Series 2220, no. 1 (2022): 012005. http://dx.doi.org/10.1088/1742-6596/2220/1/012005.

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Abstract With the rapid development of society, the acquisition of basic data of many large engineering projects such as factories, power plants and large cultural relics protection has become an essential and valuable resource for reconstruction and expansion. However, the traditional method has many constraints such as large amount of data, difficulty in collection, low security and impact on production. This paper USES the ground type 3D laser scanning equipment combined with a handheld laser scanning equipment, USES the multi-channel data fusion technology, from the control survey, point c

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Desai, Jairaj, Jidong Liu, Robert Hainje, Robert Oleksy, Ayman Habib, and Darcy Bullock. "Assessing Vehicle Profiling Accuracy of Handheld LiDAR Compared to Terrestrial Laser Scanning for Crash Scene Reconstruction." Sensors 21, no. 23 (2021): 8076. http://dx.doi.org/10.3390/s21238076.

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Forensic crash investigation often requires developing detailed profiles showing the location and extent of vehicle damage to identify impact areas, impact direction, deformation, and estimated vehicle speeds at impact. Traditional damage profiling techniques require extended and comprehensive setups for mapping and measurement that are quite labor- and time-intensive. Due to the time involved, this damage profiling is usually done in a remote holding area after the crash scene is cleared. Light detection and ranging (LiDAR) scanning technology in consumer handheld electronic devices, such as

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20

Yang, C., Z. Wang, H. Zhou, et al. "RESEARCH ON THE 3D DOCUMENTATION SYSTEM OF CLASSICAL CHINESE GARDENS IN SCENIC AREAS – TAKING KUNSHAN SUIYUAN AS AN EXAMPLE." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-M-2-2023 (June 26, 2023): 1659–63. http://dx.doi.org/10.5194/isprs-archives-xlviii-m-2-2023-1659-2023.

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Abstract. Classical Chinese gardens built in scenic areas have characteristics in rich scales, multi-type elements, and a complex development history. Due to the designed landscape characteristics of "hidden the garden in bigger landscapes", it is often difficult to obtain high-quality heritage information through traditional surveying approaches. The aim of this research is to establish a digital 3D documentation technology system for the classical gardens in scenic areas. Suiyuan Garden, a classical Chinese garden with a history of more than 300 years, was used as a case study. We have integ

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21

Gejdoš, Miloš, Jozef Výbošťok, Juliána Chudá, et al. "Assessment of New Techniques for Measuring Volume in Large Wood Chip Piles." Forests 15, no. 10 (2024): 1747. http://dx.doi.org/10.3390/f15101747.

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Our work aimed to compare the chip pile volumes calculated by laser ground scanning, UAV technology, and laser ground measurement and also to determine the accuracy, speed, and economic efficiency of each method. The large chip pile was measured in seven different ways: band measurement, laser measurement with Vertex, global navigation satellite system, handheld mobile laser scanner, terrestrial laser scanner, drone, and smartphone with a light detection and ranging sensor. All the methods were compared in terms of accuracy, price, user-friendliness, and time required to obtain results. The ca

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Kumar, Karthik, Rony Avritscher, Youmin Wang, et al. "Handheld histology-equivalent sectioning laser-scanning confocal optical microscope for interventional imaging." Biomedical Microdevices 12, no. 2 (2009): 223–33. http://dx.doi.org/10.1007/s10544-009-9377-6.

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Borrega, P. L., Y. A. Felisilda, C. J. Sarmiento, and A. Tamondong. "3D RECONSTRUCTION OF THE FORT SANTIAGO DUNGEONS USING HANDHELD LASER SCANNING METHOD." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-4/W8-2023 (April 24, 2024): 69–75. http://dx.doi.org/10.5194/isprs-archives-xlviii-4-w8-2023-69-2024.

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Abstract. The preservation of Cultural Heritage sites is an inherent responsibility of the citizens of a country. To this end, developments in digitization serve as a permanent way of preserving a site at its optimum state, and the creation of accurate 3D models becomes a repository of measurements for future reconstruction. Thus, in this study, the Fort Santiago Dungeons, a popular Cultural Heritage site in the Philippines, was 3D-reconstructed using the GeoSLAM ZEB Revo RT, a handheld Light Detection and Ranging (LiDAR) scanner that uses a Simultaneous Localization and Mapping (SLAM) Algorit

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Antova, Gergana. "Portable laser scanning solutions for 3D modelling of large buildings." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-4/W10-2024 (May 31, 2024): 13–19. http://dx.doi.org/10.5194/isprs-archives-xlviii-4-w10-2024-13-2024.

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Abstract. Portable laser scanning systems (PLSSs) are a developing technology that is being used more frequently in various application domains. One notable characteristic of these systems is their capacity to gather 3D data while in motion. Additionally, unlike mobile mapping systems that are mounted to vehicles, they are particularly effective at capturing detailed information in tight, interior, and restricted spaces. This article presents two typical applications of this promising technology for modelling huge buildings. The purpose is to equip readers with fundamental information and comp

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GRIVET, D., M. ESPINASSE, E. CINOTTI, et al. "In vivo laser scanning microscopy of cornea, conjunctiva and ocular adnexa with a handheld dermatological laser-scanning microscope: new perspectives." Acta Ophthalmologica 90 (August 6, 2012): 0. http://dx.doi.org/10.1111/j.1755-3768.2012.4642.x.

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Wang, Xing Xing, Jin Dong Wei, Yi Pei, Yu Zhu, and Hong Jun Ni. "Modeling Design and Rapid Prototyping Manufacture of Cream Bottle Based on Handheld Laser Scanning." Applied Mechanics and Materials 752-753 (April 2015): 1301–6. http://dx.doi.org/10.4028/www.scientific.net/amm.752-753.1301.

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Reverse Engineering (RE) and Rapid Prototyping (RP) were used for manufacturing cream bottle. Points cloud data of cream bottle was accessed by handheld laser scanner firstly. Then, points cloud data was handed by Imageware software and the three-dimensional model was formed by Solidworks software. Finally, the entity model was manufacturing by RP machine. In the research, rapid prototyping was combined with reverse engineering technology, manufacturing cycle was shorten, production requirements, improve efficiency and other advantages were met.

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Kelly, John P. "Imaging a Child's Fundus Without Dilation Using a Handheld Confocal Scanning Laser Ophthalmoscope." Archives of Ophthalmology 121, no. 3 (2003): 391. http://dx.doi.org/10.1001/archopht.121.3.391.

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González-Collazo, Silvia María, Jesús Balado, Iván Garrido, et al. "Santiago urban dataset SUD: Combination of Handheld and Mobile Laser Scanning point clouds." Expert Systems with Applications 238 (March 2024): 121842. http://dx.doi.org/10.1016/j.eswa.2023.121842.

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Pereira-Obaya, Dimas, Carlos Cabo, Celestino Ordóñez, and José Ramón Rodríguez-Pérez. "A Handheld Laser-Scanning-Based Methodology for Monitoring Tree Growth in Chestnut Orchards." Sensors 24, no. 6 (2024): 1717. http://dx.doi.org/10.3390/s24061717.

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Chestnut and chestnut byproducts are of worldwide interest, so there is a constant need to develop faster and more accurate monitoring techniques. Recent advances in simultaneous localization and mapping (SLAM) algorithms and user accessibility have led to increased use of handheld mobile laser scanning (HHLS) in precision agriculture. We propose a tree growth monitoring methodology, based on HHLS point cloud processing, that calculates the length of branches through spatial discretization of the point cloud for each tree. The methodology was tested by comparing two point clouds collected almo

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Hartmann, Jan, and Hamza Alkhatib. "Uncertainty Modelling of Laser Scanning Point Clouds Using Machine-Learning Methods." Remote Sensing 15, no. 9 (2023): 2349. http://dx.doi.org/10.3390/rs15092349.

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Terrestrial laser scanners (TLSs) are a standard method for 3D point cloud acquisition due to their high data rates and resolutions. In certain applications, such as deformation analysis, modelling uncertainties in the 3D point cloud is crucial. This study models the systematic deviations in laser scan distance measurements as a function of various influencing factors using machine-learning methods. A reference point cloud is recorded using a laser tracker (Leica AT 960) and a handheld scanner (Leica LAS-XL) to investigate the uncertainties of the Z+F Imager 5016 in laboratory conditions. From

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Jurjević, Luka, Mateo Gašparović, Xinlian Liang, and Ivan Balenović. "Assessment of Close-Range Remote Sensing Methods for DTM Estimation in a Lowland Deciduous Forest." Remote Sensing 13, no. 11 (2021): 2063. http://dx.doi.org/10.3390/rs13112063.

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Digital terrain models (DTMs) are important for a variety of applications in geosciences as a valuable information source in forest management planning, forest inventory, hydrology, etc. Despite their value, a DTM in a forest area is typically lower quality due to inaccessibility and limited data sources that can be used in the forest environment. In this paper, we assessed the accuracy of close-range remote sensing techniques for DTM data collection. In total, four data sources were examined, i.e., handheld personal laser scanning (PLShh, GeoSLAM Horizon), terrestrial laser scanning (TLS, FAR

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Mitka, Bartosz, Przemysław Klapa, and Pelagia Gawronek. "Laboratory Tests of Metrological Characteristics of a Non-Repetitive Low-Cost Mobile Handheld Laser Scanner." Sensors 24, no. 18 (2024): 6010. http://dx.doi.org/10.3390/s24186010.

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The popularity of mobile laser scanning systems as a surveying tool is growing among construction contractors, architects, land surveyors, and urban planners. The user-friendliness and rapid capture of precise and complete data on places and objects make them serious competitors for traditional surveying approaches. Considering the low cost and constantly improving availability of Mobile Laser Scanning (MLS), mainly handheld surveying tools, the measurement possibilities seem unlimited. We conducted a comprehensive investigation into the quality and accuracy of a point cloud generated by a rec

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Maset, E., S. Cucchiaro, F. Cazorzi, F. Crosilla, A. Fusiello, and A. Beinat. "INVESTIGATING THE PERFORMANCE OF A HANDHELD MOBILE MAPPING SYSTEM IN DIFFERENT OUTDOOR SCENARIOS." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B1-2021 (June 28, 2021): 103–9. http://dx.doi.org/10.5194/isprs-archives-xliii-b1-2021-103-2021.

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Abstract. In recent years, portable Mobile Mapping Systems (MMSs) are emerging as valuable survey instruments for fast and efficient mapping of both internal and external environments. The aim of this work is to assess the performance of a commercial handheld MMS, Gexcel HERON Lite, in two different outdoor applications. The first is the mapping of a large building, which represents a standard use-case scenario of this technology. Through the second case study, that consists in the survey of a torrent reach, we investigate instead the applicability of the handheld MMS for natural environment m

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VATANDAŞLAR, Can, and Mustafa ZEYBEK. "Application of handheld laser scanning technology for forest inventory purposes in the NE Turkey." TURKISH JOURNAL OF AGRICULTURE AND FORESTRY 44, no. 3 (2020): 229–42. http://dx.doi.org/10.3906/tar-1903-40.

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Pavelka jr., K., L. Běloch, and K. Pavelka. "ANALYSIS OF POSSIBLE GEODETIC APPROACHES FOR 3D MODEL CREATION IN BIM." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-5/W2-2023 (June 13, 2023): 77–84. http://dx.doi.org/10.5194/isprs-archives-xlviii-5-w2-2023-77-2023.

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Abstract. The topic of this paper is the description and analysis of technologies for generating a geometric basis for BIM. The main element is an analysis of the capabilities of mobile laser scanning and the outputs of this method compared to other methods. The selected interior space was measured by different technologies, laser scanning, classical geodetic using total station, and manual measurement. The main device tested was the ZEB-REVO. It is a handheld mobile laser scanner, carried by an operator. It has a range of 40 m, with the accuracy in measured lengths is 1–3cm per 10 m depending

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Tupinambá-Simões, Frederico, Adrián Pascual, Juan Guerra-Hernández, Cristóbal Ordóñez, Tiago de Conto, and Felipe Bravo. "Assessing the Performance of a Handheld Laser Scanning System for Individual Tree Mapping—A Mixed Forests Showcase in Spain." Remote Sensing 15, no. 5 (2023): 1169. http://dx.doi.org/10.3390/rs15051169.

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The use of mobile laser scanning to survey forest ecosystems is a promising, scalable technology to describe the 3D structure of forests at a high resolution. We use a structurally complex, mixed-species Mediterranean forest to test the performance of a mobile Handheld Laser Scanning (HLS) system to estimate tree attributes within a forest patch in central Spain. We describe the different stages of the HLS approach: field position, ground data collection, scanning path design, point cloud processing, alignment between detected trees and measured reference trees, and finally, the assessment of

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Yang, Jinming, Wenwen Yuan, Huicui Lu, et al. "Assessing the Performance of Handheld Laser Scanning for Individual Tree Mapping in an Urban Area." Forests 15, no. 4 (2024): 575. http://dx.doi.org/10.3390/f15040575.

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Precise individual tree or sample-based inventories derived from 3D point cloud data of mobile laser scanning can improve our comprehensive understanding of the structure, function, resilience, biodiversity, and ecosystem services of urban forests. This study assessed the performance of a handheld laser scanning system (HLS) for the extraction of tree position, diameter at breast height (DBH), and tree height (H) in an urban area. A total of 2083 trees of 13 species from 34 plots were analyzed. The results showed that the registration of tree positions using ground control points (GCPs) demons

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Hyyppä, Eric, Xiaowei Yu, Harri Kaartinen, et al. "Comparison of Backpack, Handheld, Under-Canopy UAV, and Above-Canopy UAV Laser Scanning for Field Reference Data Collection in Boreal Forests." Remote Sensing 12, no. 20 (2020): 3327. http://dx.doi.org/10.3390/rs12203327.

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In this work, we compared six emerging mobile laser scanning (MLS) technologies for field reference data collection at the individual tree level in boreal forest conditions. The systems under study were an in-house developed AKHKA-R3 backpack laser scanner, a handheld Zeb-Horizon laser scanner, an under-canopy UAV (Unmanned Aircraft Vehicle) laser scanning system, and three above-canopy UAV laser scanning systems providing point clouds with varying point densities. To assess the performance of the methods for automated measurements of diameter at breast height (DBH), stem curve, tree height an

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Ahmed, Mahmoud, C. T. Haas, and Ralph Haas. "Using digital photogrammetry for pipe-works progress tracking1This paper is one of a selection of papers in this Special Issue on Construction Engineering and Management." Canadian Journal of Civil Engineering 39, no. 9 (2012): 1062–71. http://dx.doi.org/10.1139/l2012-055.

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Pipe-works are among the most complicated items to be tracked in the course of monitoring construction project progress. Traditionally, the tracking of pipe-works progress is conducted either manually or using laser scanning technology. While laser scanning is a 3D imaging technique, and commercial software exists to construct 3D CAD models of piping based on such images, it suffers from portability, purchase cost, and other disadvantages. This paper describes digital photogrammetry technology as an alternative for pipe-works reconstruction and as a cost effective tracking tool. For validation

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González-Collazo, S. M., J. Balado, R. M. Túñez-Alcalde, I. Garrido, H. Lorenzo, and L. Díaz-Vilariño. "ENHANCING URBAN PATHFINDING FOR PEDESTRIANS THROUGH FUSION OF MLS AND HMLS DATA." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLVIII-4/W9-2024 (March 8, 2024): 197–204. http://dx.doi.org/10.5194/isprs-archives-xlviii-4-w9-2024-197-2024.

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Abstract. Pedestrian pathfinding is crucial for enhancing pedestrian mobility in urban environments. In this research a method to generate navigation graphs based on Mobile Laser Scanning (MLS) and Handheld Laser Scanning (HMLS) data fusion is developed. The input data comprises a 2-kilometer urban street network that integrates both MLS and HMLS data, effectively mitigating sidewalk occlusions caused mainly by parked vehicles. The proposed method encompasses the following steps: (1) Deep Learning semantic segmentation of urban ground elements and navigation-related obstacles, (2) Static vs. D

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Callegari, Enrica, Jacopo Agnolucci, Francesco Angiola, et al. "The Precision, Inter-Rater Reliability, and Accuracy of a Handheld Scanner Equipped with a Light Detection and Ranging Sensor in Measuring Parts of the Body—A Preliminary Validation Study." Sensors 24, no. 2 (2024): 500. http://dx.doi.org/10.3390/s24020500.

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Background: Anthropometric measurements play a crucial role in medico-legal practices. Actually, several scanning technologies are employed in post-mortem investigations for forensic anthropological measurements. This study aims to evaluate the precision, inter-rater reliability, and accuracy of a handheld scanner in measuring various body parts. Methods: Three independent raters measured seven longitudinal distances using an iPad Pro equipped with a LiDAR sensor and specific software. These measurements were statistically compared to manual measurements conducted by an operator using a laser

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Krummenauer, Alex, Douglas Bergamo, Roberto Serpa Soares, Victor Emmanuel de Oliveira Gomes, and Vitor Camargo Nardelli. "Comparison of Dimensional Accuracy between a Laser Scanner and a Laser Tracker with Handheld Scan in a Laboratory Setting." Metrology 4, no. 2 (2024): 205–26. http://dx.doi.org/10.3390/metrology4020013.

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The dimensional accuracy of a laser scanner has been extensively evaluated using various measurement methods and diverse reference standards. This study specifically focuses on two key considerations. Firstly, it assesses the dimensional accuracy of the laser scanner by employing another laser scanner, a handheld scanner, as the reference measurement method. Secondly, the study involves the use of three spheres fixed on each wall in both coplanar and non-coplanar positions within a laboratory room at SENAI ISI-SIM. The primary objective is to determine the dimensional accuracy between the cent

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Huang, Xia, Shunyi Zheng, and Ningning Zhu. "High-Throughput Legume Seed Phenotyping Using a Handheld 3D Laser Scanner." Remote Sensing 14, no. 2 (2022): 431. http://dx.doi.org/10.3390/rs14020431.

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High-throughput phenotyping involves many samples and diverse trait types. For the goal of automatic measurement and batch data processing, a novel method for high-throughput legume seed phenotyping is proposed. A pipeline of automatic data acquisition and processing, including point cloud acquisition, single-seed extraction, pose normalization, three-dimensional (3D) reconstruction, and trait estimation, is proposed. First, a handheld laser scanner is used to obtain the legume seed point clouds in batches. Second, a combined segmentation method using the RANSAC method, the Euclidean segmentat

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Vasilakos, C., S. Chatzistamatis, O. Roussou, and N. Soulakellis. "TERRESTRIAL PHOTOGRAMMETRY VS LASER SCANNING FOR RAPID EARTHQUAKE DAMAGE ASSESSMENT." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-3/W4 (March 6, 2018): 527–33. http://dx.doi.org/10.5194/isprs-archives-xlii-3-w4-527-2018.

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<p><strong>Abstract.</strong> Building damage assessment caused by earthquakes is essential during the response phase following a catastrophic event. Modern techniques include terrestrial and aerial photogrammetry based on Structure from Motion algorithm and Laser Scanning with the latter to prove its superiority in accuracy assessment due to the high-density point clouds. However, standardized procedures during emergency surveys often could not be followed due to restrictions of outdoor operations because of debris or decrepit buildings, the high human presence of civil prot

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Ryan, Robert W., Tamir Wolf, Robert F. Spetzler, Stephen W. Coons, Yoel Fink, and Mark C. Preul. "Application of a flexible CO2 laser fiber for neurosurgery: laser-tissue interactions." Journal of Neurosurgery 112, no. 2 (2010): 434–43. http://dx.doi.org/10.3171/2009.7.jns09356.

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Object The CO2 laser has an excellent profile for use in neurosurgery. Its high absorption in water results in low thermal spread, sparing adjacent tissue. Use of this laser has been limited to line-of-sight applications because no solid fiber optic cables could transmit its wavelength. Flexible photonic bandgap fiber technology enables delivery of CO2 laser energy through a flexible fiber easily manipulated in a handheld device. The authors examined and compared the first use of this CO2 laser fiber to conventional methods for incising neural tissue. Methods Carbon dioxide laser energy was de

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Sun, Wenxiao, Xinlu Qu, Jian Wang, Fengxiang Jin, and Zhiyuan Li. "Multi-Platform Point Cloud Registration Method Based on the Coarse-To-Fine Strategy for an Underground Mine." Applied Sciences 14, no. 22 (2024): 10620. http://dx.doi.org/10.3390/app142210620.

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Spatially referenced and geometrically accurate laser scanning is essential for the safety monitoring of an underground mine. However, the spatial inconsistency of point clouds collected by heterogeneous platforms presents challenges in achieving seamless fusion. In our study, the terrestrial and handheld laser scanning (TLS and HLS) point cloud registration method based on the coarse-to-fine strategy is proposed. Firstly, the point features (e.g., target spheres) are extracted from TLS and HLS point clouds to provide the coarse transform parameters. Then, the fine registration algorithm based

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Vatandaşlar, Can, and Mustafa Zeybek. "Extraction of forest inventory parameters using handheld mobile laser scanning: A case study from Trabzon, Turkey." Measurement 177 (June 2021): 109328. http://dx.doi.org/10.1016/j.measurement.2021.109328.

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Eker, R., Z. Ucar, and A. Aydın. "A PRIMARY TEST RESULTS OF A HANDHELD MOBILE LASER SCANNER IN EXTRACTION OF TREE PARAMETERS." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B1-2022 (May 30, 2022): 207–12. http://dx.doi.org/10.5194/isprs-archives-xliii-b1-2022-207-2022.

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Abstract. Sustainable forest planning and management require accurate and precise information about the estimation of forest resources. In particular, two tree parameters are very important among the others: diameter-at-breast height (DBH) and height that are used to estimate the volume and biomass of the tree. With the development of Remote Sensing (RS), information about the tree parameters can be acquired in more accurately and precisely with laser scanning technology. In this study, a Handheld Mobile Laser Scanner (HMLS), called TORCH, was tested for extracting tree parameters with 3D Fore

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Stăncioiu, Petru Tudor, Ioan Dutcă, Sergiu Constantin Florea, and Marius Paraschiv. "Measuring Distances and Areas under Forest Canopy Conditions—A Comparison of Handheld Mobile Laser Scanner and Handheld Global Navigation Satellite System." Forests 13, no. 11 (2022): 1893. http://dx.doi.org/10.3390/f13111893.

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Measuring distances and areas under forest canopy conditions is often required for a broad range of forest research and management-related activities. While modern technologies, such as handheld mobile laser scanning (MLS), made possible the tridimensional representation of forests with great accuracy, the practical application is still limited by its high costs and challenging data processing. The handheld Global Navigation Satellite System (GNSS) represents the classical alternative, determining the distances and areas based on point coordinates. In this study, we aimed to assess the accurac

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Sadeghi, F., and H. Arefi. "OCCLUDED AREA REMOVING FROM HANDHELD LASER SCANNER DATA DURING 3D BUILDING MODELLING." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-4/W18 (October 19, 2019): 935–39. http://dx.doi.org/10.5194/isprs-archives-xlii-4-w18-935-2019.

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Abstract. 3D building modelling has been turned to be one of the most interesting and hottest subjects in photogrammetry in last two decades, and it seems that photogrammetry provides the only economic means to acquire truly 3D city-data. Most of the researches proposed methods for 3d building modelling in LoD2 using aerial images and LIDAR data and the produced models will be enriched by oblique images, therefore there is always a demand for a user to interpret the façade or in other manual building reconstruction process the operator should draw boundaries to represent the building model and

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