Bibliographies thématiques / Digital photogrammetry technique

Littérature scientifique sur le sujet « Digital photogrammetry technique »

Auteur : Grafiati
Publié le 10 mars 2023

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Articles de revues sur le sujet "Digital photogrammetry technique"

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W. Schindler, Alexander. « Reflections on Photogrammetry ». Membrana Journal of Photography, Vol. 3, no. 1 (2018) : 34–41. http://dx.doi.org/10.47659/m4.034.art.

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This article presents an overview of the history, principles, and current developments in the media technological field of photogrammetry. By chronicling the isomorphic shift taking place in image capturing, we seek to show that photogrammetry has led the way forward in seeing technical images not only as two dimensional projections, but as three-dimensional model-based images. In the mid-nineteenth century, photogrammetry was first used for the documentation of architectural objects and it later became a standard technique in aerial photography. Although its fields of application have become more extensive, photogrammetry’s basic principle hasn’t fundamentally changed: it is still defined as the three- dimensional geometric reconstruction of two-dimensional photographs through the measuring of reference points. With digital technological standards and advances in camera technology, photogrammetric imaging nowadays is intensively used for object recognition in machine vision and robotics. Beside this, photogrammetry is also opening new possibilities for documentation in the fields of investigative arts, this being explored with a discussion on the “Ground Truth” project from Forensic Architecture. Keywords: investigative art, machine vision, object recognition, photogrammetry, photography
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Gruen, Armin W., et Horst A. Beyer. « REAL-TIME PHOTOGRAMMETRY AT THE DIGITAL PHOTOGRAMMETRIC STATION (DIPS) OF ETH ZURICH ». Canadian Surveyor 41, no 2 (juin 1987) : 181–99. http://dx.doi.org/10.1139/tcs-1987-0014.

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Real-time photogrammetry (RTP) is a non-contact three-dimensional measurement technique with a response time of one video cycle. As part of a research and development program for digital and real-time photogrammetry, the Institute of Geodesy and Photogrammety at the Swiss Federal Institute of Technology, Zurich, Switzerland, has established the Digital Photogrammetric Station (DIPS). The hardware and software of this development system is explained. Hardware aspects of solid-state cameras relevant to camera calibration for RTP are discussed. An off-line bundle adjustment program with additional parameters has been installed. An initial calibration and point positioning test using this program and existing image processing algorithms has been performed. The processing steps and results are analyzed. Accuracies, as computed from object space check points, in planimetry of 1:5000 or 0.09 pixel pitch, in depth of 0.08%c of object distance, have been achieved.
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Teo, T. A. « 3D DEFORMATION MEASUREMENT OF CONCRETE WALL USING CLOSE-RANGE PHOTOGRAMMETRY ». ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B2-2020 (14 août 2020) : 1175–79. http://dx.doi.org/10.5194/isprs-archives-xliii-b2-2020-1175-2020.

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Abstract. Due to the development of digital image processing, digital photogrammetry is becoming an interesting research area in the field of structural monitoring in civil engineering. This study presents a photogrammetric measurement technique for concrete wall deformation monitoring in the destructive experiment. The non-contact photogrammetric measurement technique which provides surface deformation, is more flexible than the contacted single-point measurement technique (e.g., linear variable displacement transducers, LVDT). The major steps of the proposed scheme include (1) camera calibration, (2) orientation modeling, (3) 3D dense matching, and (4) filtering and interpolation for surface deformation. This experiment used two non-metric digital cameras to measure the deformation of a concrete wall in destructive experiment. The validation compared the image-derived and ranger-derived displacements during the experiment with mean error and standard errors of 32 epochs were −0.02mm and 0.81mm, respectively. The correlation between image-derived displacement and LVDT-derived displacement was 0.9803. The advantage of photogrammetry is to derive surface deformation which covered the whole wall during the experiment. In summary, this study demonstrated that photogrammetry is a useful measurement technique for concrete wall destructive experiment.
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Galantucci, L. M., R. Ferrandes et G. Percoco. « Digital Photogrammetry for Facial Recognition ». Journal of Computing and Information Science in Engineering 6, no 4 (30 mai 2006) : 390–96. http://dx.doi.org/10.1115/1.2356499.

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In this paper, the authors present a biometric low-cost 3D acquisition system, based on a digital photogrammetry technique. The aim of the work is to analyze the suitability of this system for facial recognition purposes. The facial data of a set of 20 people were acquired with the photogrammetric system developed by the authors, and different CAD 3D models were reconstructed for each person. The results are quantified by aligning the models and calculating mean distances and standard deviations between them using two different methods. The former considers the entire face; the latter is based on a few fiducial points of the face.
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Nishiyama, Satoshi, Nao Minakata, Teruyuki Kikuchi et Takao Yano. « Improved digital photogrammetry technique for crack monitoring ». Advanced Engineering Informatics 29, no 4 (octobre 2015) : 851–58. http://dx.doi.org/10.1016/j.aei.2015.05.005.

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Elhalawani, Mariem A., Zaki M. Zeidan et Ashraf A. A. Beshr. « IMPLEMENTATION OF CLOSE RANGE PHOTOGRAMMETRY USING MODERN NON-METRIC DIGITAL CAMERAS FOR ARCHITECTURAL DOCUMENTATION ». Geodesy and cartography 47, no 1 (26 avril 2021) : 45–53. http://dx.doi.org/10.3846/gac.2021.11269.

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The development of applied geodetic techniques for mapping and documentation of historical structures, buildings and sites is an important and vital purpose for contribution of any recording of cultural heritage for any country such as Egypt. This is done to preserve and restore any valuable architectural or other cultural monument, as a support to architectural, archaeological and other art-historical research throughout the ages. The purpose of this paper is to use close range photogrammetry technique (CRP) to reconstruct 3D model of architectural and historical mosque facade and comparing the accuracy of using digital commercial non-metric cameras with different resolutions and metric camera with flatbed scanner and photogrammetric scanner for architectural building documentation. El-Nasr Mosque façade in Mansoura city, Egypt was chosen as a case study in this paper. At first, twenty five points were selected at mosque façade at different elevations and distributed at different façade surfaces and observed using total station. Some of these points were selected as control points and the others were selected as check points to validate the results. Effect of control point’s number on image processing and analysis is also studied. Three cameras positions were selected for imaging to get the full details of mosque façade. Close range Digital Workstation (CDW) program was used for processing and analysis of multiple images. The results are indicated that close range photogrammetry using metric camera with photogrammetry scanner instead of flatbed scanner in technique is accurate enough to be beneficial in 3D architectural building documentation. Digital cameras with CRP technique give up different accuracy that depends mainly on the resolution of cameras and camera specifications.
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Alsadik, B., M. Gerke et G. Vosselman. « Visibility analysis of point cloud in close range photogrammetry ». ISPRS Annals of Photogrammetry, Remote Sensing and Spatial Information Sciences II-5 (28 mai 2014) : 9–16. http://dx.doi.org/10.5194/isprsannals-ii-5-9-2014.

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The ongoing development of advanced techniques in photogrammetry, computer vision (CV), robotics and laser scanning to efficiently acquire three dimensional geometric data offer new possibilities for many applications. The output of these techniques in the digital form is often a sparse or dense point cloud describing the 3D shape of an object. Viewing these point clouds in a computerized digital environment holds a difficulty in displaying the visible points of the object from a given viewpoint rather than the hidden points. This visibility problem is a major computer graphics topic and has been solved previously by using different mathematical techniques. However, to our knowledge, there is no study of presenting the different visibility analysis methods of point clouds from a photogrammetric viewpoint. The visibility approaches, which are surface based or voxel based, and the hidden point removal (HPR) will be presented. Three different problems in close range photogrammetry are presented: camera network design, guidance with synthetic images and the gap detection in a point cloud. The latter one introduces also a new concept of gap classification. Every problem utilizes a different visibility technique to show the valuable effect of visibility analysis on the final solution.
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EL-ASHMAWY, Khalid L. A. « USING SMART PHONES FOR DEFORMATIONS MEASUREMENTS OF STRUCTURES ». Geodesy and cartography 43, no 2 (25 juin 2017) : 66–72. http://dx.doi.org/10.3846/20296991.2017.1330770.

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The present work tests the suitability of using the digital cameras of smart phones for close range photogrammetry applications. For this purpose two cameras of smart phones Lumia 535 and Lumia 950 XL were used. The resolutions of the two cameras are 5 and 20 Mpixels respectively. The tests consist of (a) self calibration of the two cameras, (b) the implementation of close-range photogrammetry using the cameras of the two smart phones, theodolite intersection with LST method, and linear variable displacement transducers (LVDTs) for the measurement of vertical deflections, and (c) accuracy of photogrammetric determination of object space coordinates. The results of using Lumia 950 XL are much better than using Lumia 535 and are better or comparable to the results of theodolite intersection with least squares technique (LST). Finally, it can be stated that the digital cameras of smart phones are suitable for close range photogrammetry applications according to accuracy, costs and flexibility.
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Jo, Y. H., et J. Y. Kim. « THREE-DIMENSIONAL DIGITAL DOCUMENTATION OF HERITAGE SITES USING TERRESTRIAL LASER SCANNING AND UNMANNED AERIAL VEHICLE PHOTOGRAMMETRY ». ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W5 (18 août 2017) : 395–98. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w5-395-2017.

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Three-dimensional digital documentation is an important technique for the maintenance and monitoring of cultural heritage sites. This study focuses on the three-dimensional digital documentation of the Magoksa Temple, Republic of Korea, using a combination of terrestrial laser scanning and unmanned aerial vehicle (UAV) photogrammetry. Terrestrial laser scanning mostly acquired the vertical geometry of the buildings. In addition, the digital orthoimage produced by UAV photogrammetry had higher horizontal data acquisition rate than that produced by terrestrial laser scanning. Thus, the scanning and UAV photogrammetry were merged by matching 20 corresponding points and an absolute coordinate system was established using seven ground control points. The final, complete threedimensional shape had perfect horizontal and vertical geometries. This study demonstrates the potential of integrating terrestrial laser scanning and UAV photogrammetry for three-dimensional digital documentation. This new technique is expected to contribute to the three-dimensional digital documentation and spatial analysis of cultural heritage sites.
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Shahbazi, M. « Hybrid 3D Dynamic Measurement by Particle Swarm Optimization and Photogrammetric Tracking ». Measurement Science Review 13, no 6 (1 décembre 2013) : 298–304. http://dx.doi.org/10.2478/msr-2013-0044.

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Abstract High-accuracy motion modeling in three dimensions via digital images has been increasingly the matter of interest in photogrammetry and computer vision communities. Although accurate sub-pixel image registration techniques are the key elements of measurement, they still demand enhanced intelligence, autonomy, and robustness. In this paper, a new correlationbased technique of stereovision is proposed to perform inter-frame feature tracking, inter-camera image registration, and to measure the 3D state vector of features simultaneously. The developed algorithm is founded on population-based intelligence (particle swarm optimization) and photogrammetric modeling. The proposed technique is mainly aimed at reducing the computational complexities of non-linear optimization methods of digital image registration for deformation measurement, and passing through 2D image correlation to 3D motion modeling. The preliminary results have illustrated the feasibility of this technique to detect and measure sub-millimeter deformations by performing accurate, sub-pixel image registration.
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Thèses sur le sujet "Digital photogrammetry technique"

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Browbank, Ian. « Intraoperative registration for robotic-assisted orthopaedic surgery : a digital X-ray photogrammetry based technique ». Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/12934.

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Changes in orthopaedic practice have led to an increased reliance upon fluoroscopic image-guidance during fracture fixation (osteosynthesis) procedures. The resulting complexity of surgical techniques, and concerns over X-ray radiation exposure levels to orthopaedic surgeons, has prompted an investigation of robotic-assisted orthopaedic surgery, with a view to improving the precision, repeatability and radiation safety of existing fluoroscopically-guided bone drilling procedures. A prerequisite for such an application is to establish the patient's location with respect to the robotic manipulator. Owing to the inherent nature of osteosynthesis procedures, this intraoperative registration process can only be performed by quantifying the existing fluoroscopic examination process. A digital X-ray photogrammetry based registration technique, which uses a radiolucent robot-mounted X-ray calibration frame, has therefore been investigated. When this calibration frame is simultaneously imaged with the patient, discrete registration markers, corresponding to radiopaque fiducials embedded in the frame, are superimposed into the standard intraoperative X-ray images. Digitising these images, using a PC-based frame grabber card, has allowed semi-automatic image analysis routines to be implemented. Applying correction-calibration software, which provides on-line compensation for image distortion effects, then allows the imaged part of the patient's skeleton to be located, with respect to the calibration frame's coordinate system, thus establishing intraoperative registration. In vitro laboratory-based trials of this registration technique indicate that reconstruction errors are in the sub-millimetre range. As such, this new approach represents a low cost non-invasive registration option, which fully adheres to "operating room compatibility" criteria, and is applicable to a wide range of osteosynthesis procedures. Significantly, by extending the technique to include quantification of the trajectory plarming process, it has also been possible to demonstrate major improvements over existing surgical techniques.
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Smit, Julian Lloyd. « Three dimensional measurement of textured surfaces using digital photogrammetric techniques ». Doctoral thesis, University of Cape Town, 1997. http://hdl.handle.net/11427/16087.

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Bibliography: pages 133-156.
The deep-level gold mines on the Witwatersrand (South Africa) are located at depths of over 3,000m below surface. Mining excavations follow tabular reefs that are kilometres in extent, but only a few centimetres thick. Due to the great depths of these excavations and the large overburden of rock, immense pressure is exerted on the rock mass being excavated. In order to relieve this stress in the rock mass being mined, the rock is "pre-conditioned" by pre-fracturing the rock face with large blasts. This has the effect of pushing the critical stress load further into the rock mass, thus increasing safety at the rock face. To better understand the rock behaviour as a result of by pre-conditioning blasts, it is desirable to quantify the deformations of the rock face. Digital photogrammetry provides an ideally suited method of monitoring these deformations, as the necessary equipment is portable and easy to use underground, where the conditions are extreme with temperatures approaching 40°C and humidity levels close to 100%. Digital photogrammetric techniques are also highly accurate, and can be used to detect relatively small three-dimensional movements. The determination of the three-dimensional (XYZ) co-ordinates of the rock face, represented by densely spaced individual points, by means of digital photogrammetric techniques, is reported in this thesis. The novel measurement system developed comprises the following components: * establishment of a stable reference co-ordinate system; * image acquisition; * camera calibration and exterior orientation calculation; * feature extraction; * multi-image matching and space intersection; and * surface modelling. The details of the techniques developed and implemented in order to generate the necessary object space co-ordinates are discussed. Sub-millimetre accuracy point determination, as required for deformation analysis was achieved and a sample of the underground test result data is presented. The final analysis of the underground test data made it apparent that digital photogrammetry is highly suitable for the determination of digital terrain models of the rock surfaces, for subsequent deformation analysis. The relative speed of the process and the convenient size of the equipment makes the technology especially suitable to the demanding underground mining environment. The difficulties, which were experienced as a result of the highly restrictive environment, were overcome through careful planning and pre-analysis. It can thus be concluded that this approach is not only feasible, but it meets the stringent demands of the underground mining industry, as is confirmed by the high accuracy of the final surface point co-ordinates achieved. In addition to being implemented in the underground mining industry, the measurement system developed was used for the mapping of several other textured surfaces. In particular it was used in mapping the 3.6 million-year-old hominid trackway located at Laetoli (Tanzania), the imprints of cheetah and rhinoceros for the purposes of conservation, and for the archaeological documentation of a shipwreck found off the Cape coast (South Africa). All of these applications are discussed and the results achieved presented.
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Gyftakis, Sotirios. « Image-based Change Detection of Geospatial Objects Using Positional Uncertainty ». Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/GyftakisS2005.pdf.

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Mountrakis, Georgios. « Image-Based Change Detection Using An Integrated Spatiotemporal Gazetteer ». Fogler Library, University of Maine, 2000. http://www.library.umaine.edu/theses/pdf/Mountrakis2000.pdf.

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Muratoglu, Bukay. « Monitoring Bulbulderesi And Bakacak Landslides With Photogrammetric Techniques ». Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/3/12610586/index.pdf.

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Every year, thousands of people all over the world are loosing their lives in natural disasters. As a second most widespread hazard, landslides are still a disaster problem for Turkey. The long-term monitoring studies of instability phenomena have a paramount importance for Turkey to reduce its both direct and indirect effects. The objective of this thesis is to monitor the activity of the Bü
lbü
lderesi and Bakacak landslides in Asarsuyu Catchment for 42 years period by the digital aerial photogrammetric techniques while evaluating the possible use of archive aerial photography in such analysis. To achieve the purpose of the study an orthophoto map was generated by aerial photographs belonging to 1994 year. The orthophoto map was utilized as a base map for aerial photo interpretation of different sets of aerial photographs corresponding to 1952, 1972, 1984 and 1994 years. As a result of this, 4 landslide activity maps are obtained. In addition, the characteristics of these landslides are analyzed by utilizing digital elevation model (DEM) created from stereo photographs of 1994. As a result of the study, no considerable variation is detected in the position of main boundaries of Bü
lbü
lderesi and Bakacak landslides except some minor differences. However, within the landslides many topographical changes were observed between 1952 and 1994 period. Based on the profiles from toe to crest of the Bü
lbü
lderesi landslide, the approximate length was measured as 4773m whereas the approximate width was about 2614m. The areal extent was calculated as ~12km2 having an approximate slope gradient ranging between 10-15°
with local variations. On the other hand, the approximate length of Bakacak landslide was 4420m and the approximate width was 832m from toe to crest with an area of ~4km2 and with an approximate slope angle 9-14°
.
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Bastian, Andrea Verri. « Métodos e técnicas de baixo custo para levantamento métrico de sítios históricos ». Faculdade de Arquitetura e Urbanismo, 2015. http://repositorio.ufba.br/ri/handle/ri/25952.

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Esta pesquisa apresenta um estudo sobre métodos e técnicas de baixo custo para o levantamento métrico de sítios históricos, iniciando com os conceitos de patrimônio cultural e as primeiras recomendações internacionais para conservação e restauro de monumentos. Foram discutidos também, a crescente preocupação com a proteção de bens no Brasil e os diversos inventários já realizados. Foram apresentadas as principais tecnologias para levantamento de formas arquitetônicas baseadas em imagens com ênfase na Fotogrametria Digital, os conceitos e processos envolvidos, os requisitos e orientações para levantamentos fotogramétricos e os principais programas utilizados para restituição. A pesquisa, também, tratou do problema de extração de feições a partir de imagens digitais, discutindo os conceitos e etapas de processamento. A parte prática mostra os estudos de caso realizados com o objetivo de apreender e testar três ferramentas (PhotoModeler, Orthoware e pacote Sphera), avaliando qualidade, limites e potencialidades, gerando como produtos: ortofotos, ortofotomosaico e desenhos de restituição de fachadas, que foram utilizados como fonte de dados para geração de modelos geométricos. Ainda, foram realizados experimentos para extração automática de feições (vetorização automática) de imagens com o intuito de facilitar o processo de vetorização das ortofotos. Pode-se comprovar que a Fotogrametria Digital é uma ferramenta acessível, de custo reduzido que atende à demanda existente de documentação, de forma rápida e precisa; mas, para que isso seja possível, se deve levar em conta o conhecimento das diversas técnicas, a definição dos produtos desejados e as ferramentas existentes para que a escolha recaia sobre a técnica mais adequada.
This thesis presents a study on methods and low-cost techniques for historic sites surveys, it starts with the concepts of culture heritage and the first international recommendations for conservation and restoration of monuments, this study discussed about the evolution of the concern for the protection of property in Brazil and the various inventories already made. It presented the survey technologies for architectural documentation based on images with emphasis on Digital Photogrammetry, the concepts and processes involved the requirements and guidelines for photogrammetric surveys and the main photogrammetric software used to restitution. The survey also addressed the problem of features extraction from digital images, discussing the concepts and processing steps. The practical part presents some case studies that allowed to the apprehending and also the testing of three tools (PhotoModeler, Orthoware and Sphera package), as a way to assess quality, limits and potential to generate products as orthophotos, ortofotomosaico and facades restitution drawings, which were used as data source for generating geometric models. Still, experiments for automatic feature extraction were performed (automatic vectorization) of images in order to facilitate the process of vectorization from orthophotos. Digital Photogrammetry proved to be a handy low-cost tool, which meets the existing demand for documentation, as quickly and accurately as possible, but in order to make this possible is necessary to know the different techniques,the definition of the desired products and existing survey methods to select the most appropriate technique.
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Moore, Alahna. « Using Digital Mapping Techniques to Rapidly Document Vulnerable Historical Landscapes in Coastal Louisiana : Holt Cemetery Case Study ». ScholarWorks@UNO, 2018. https://scholarworks.uno.edu/td/2477.

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This thesis outlines a technique for rapid documentation of historic sites in volatile cultural landscapes. Using Holt Cemetery as an exemplary case study, a workflow was developed incorporating RTK terrain survey, UAS aerial imagery, photogrammetry, GIS, and smartphone data collection in order to create a multifaceted database of the material and spatial conditions, as well as the patterns of use, that exist at the cemetery. The purpose of this research is to create a framework for improving the speed of data creation and increasing the accessibility of information regarding threatened cultural resources. It is intended that these processes can be scaled and adapted for use at any site, and that the products generated can be utilized by researchers, resource management professionals, and preservationists. In utilizing expedited methods, this thesis specifically advocates for documentation of sites that exist in coastal environments and are facing imminent destruction due to environmental degradation.
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Vecchione, Rossella. « High-resolution 3D geomatic techniques to assess hazardous spills impacts on road surface performances ». Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021.

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Constantly growing people’s needs and industrial technologies cause the necessity to increase transport, which simultaneously increases the risk of accidents on the roads and spills of hazardous substances, including leakage of oil, hydraulic fluids, lubricants, and cargo spillage. These substances threaten the safety of road, all the road users and natural environments. Asphalt road surfaces are degraded by fuel or other liquid spillages; they can contribute to increase road surface material damage during vehicles trafficking. The effects of spilled substances on the road surface and consequently on the environment and user safety depend also on the exposure time. Due to the unpredictable of accidental situations and the positioning within the territory, there are situations that are managed at different time. Therefore, the exposure time become a fundamental parameter to be considered in the test to evaluate the different behaviors of road surface and the variation in danger over time. In this scenario, the research aims to evaluate the effects of hazardous liquid spilled from vehicles on the asphalt properties and related safety parameters by means of two combined high-resolution 3D geomatic techniques and over different exposure time. Geomatic techniques employed for the characterization of the asphalt samples belong to two different categories: active triangulation techniques (3D structured light projection scanner) and photogrammetric techniques (digital photogrammetry). These techniques are able to perform a three-dimensional modeling of the detected objects: a process that goes from data acquisition to the creation of a virtual 3D model. Products of these modeling should guarantee the maximum geometry accuracy and photo-realistic nature of the scanned objects. Some indicators have been extracted from high-resolution 3D models to study changes in asphalt performances due to the spillage of five different hazardous substances.
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Fernandes, Sandro Roberto. « Ferramenta de visão computacional para processos fotogramétricos ». Universidade do Estado do Rio de Janeiro, 2008. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=718.

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Nesta dissertação é apresentado o desenvolvimento de uma ferramenta computacional para o processamento de pares de imagens estereoscópicas obtidos por câmeras aéreas métricas e não métricas. O programa foi desenvolvido na linguagem C++ e foi utilizado a biblioteca OpenGL. O resultado obtido é uma imagem tridimensional de onde pode ser extraídas cotas de altura e formas de terreno. Estas imagens poderão ser usadas no estudo de áreas de risco em encostas.
In this dissertation is presented the development of a computational tool for the processing of pairs of images estereoscópicas obtained by metric and not metric aerial cameras. The program was developed in the program language C++ and the library was used OpenGL. The result of the program is a three-dimensional image from where it can be extracted height quotas and land forms. These images can be used in the study of risk areas on slopes.
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Chen, Li-Sheng, et 陳立笙. « Integration of Digital Photogrammetry and Laser Scanning Technique for Generating High-Quality 3D Point Clouds ». Thesis, 2017. http://ndltd.ncl.edu.tw/handle/y88x5u.

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碩士
國立臺灣大學
土木工程學研究所
105
The Light Detection and Ranging (LiDAR) technique is a popular 3D surveying technique nowadays, which is capable of swiftly and precisely acquiring point cloud data with high density, for various engineering monitoring tasks. However, due to the limitation on the mechanism of the used technique, the point cloud data acquired by the LiDAR system frequently reaches unfavorable results, which have the flaws, such as uneven resolution and missing areas. In order to solve this problem, a combined approach for delivering high quality 3D colored point cloud is developed in this study, making the quality improvement of point cloud can be accomplished by integrating accurate geometric data from the LiDAR point cloud with the auxiliary information from images. The proposed approach, firstly determines the camera exterior orientation parameters by applying a semi-automatic process based on image matching technique. Secondly, for improving the geometric integrity of the raw data, the collinearity condition, as well as the geometry information from edge and planar features, will be used for point cloud reconstruction and densification. Finally, the abundant spectral information from multi-view images will be extracted and assigned to the refined point cloud data for generating high-quality result, which can be serve as a reliable and stable data source for further applications. The experiment result indicated that the proposed approach can adequately utilize the information from image data to increase the geometrical detail of the LiDAR point cloud. In conclusion, the quality improvement can be achieved through the use of data from different sources, which can successively reduces the limitation of current 3D surveying techniques, and also provides much more reliable and stable 3D information for applications.
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Livres sur le sujet "Digital photogrammetry technique"

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Schenk, Toni. Digital photogrammetry. Laurelville, Ohio : TerraScience, 1999.

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Linder, Wilfried. Digital photogrammetry : A practical course. 3e éd. Berlin : Springer, 2009.

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Kasser, Michel. Digital Photogrammetry. London : Taylor & Francis Group Plc, 2004.

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Yves, Egels, dir. Digital photogrammetry. London : Taylor & Francis, 2002.

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Linder, Wilfried. Digital photogrammetry : Theory and applications. Berlin : Springer, 2003.

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Cliff, Greve, et American Society of Photogrammetry and Remote Sensing., dir. Digital photogrammetry : An addendum to the Manual of photogrammetry. Bethesda, MD : American Society of Photogrammetry and Remote Sensing, 1996.

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Linder, Wilfried. Digital photogrammetry : Theory and applications. Berlin : Springer, 2002.

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1939-, Ebner Heinrich, Fritsch D, Heipke C et International Society for Photogrammetry and Remote Sensing., dir. Digital photogrammetric systems. Karlsruhe : Wichmann, 1991.

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T, Luhmann, dir. Close range photogrammetry : Principles, techniques and applications. Dunbeath : Whittles, 2006.

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Shu zi she ying ce liang yan jiu 30 nian. Wuhan : Wuhan da xue chu ban she, 2007.

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Chapitres de livres sur le sujet "Digital photogrammetry technique"

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Azevedo, Luís, Pedro Molinero-Mourelle, José L. Antonaya-Martín, Jaime del Río-Highsmith, André Correia et Miguel Gómez-Polo. « Photogrammetry Technique for the 3D Digital Impression of Multiple Dental Implants ». Dans VipIMAGE 2019, 615–19. Cham : Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-32040-9_62.

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Al-Mamari, Mahmood M., Sameh A. Kantoush et Tetsuya Sumi. « Innovative Monitoring Techniques for Wadi Flash Flood by Using Image-Based Analysis ». Dans Natural Disaster Science and Mitigation Engineering : DPRI reports, 251–66. Singapore : Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-2904-4_9.

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AbstractFlash floods in wadi systems are a very important environmental issue, and their monitoring is necessary for many applications, including water resource management, irrigation and flood control. However, monitoring networks are very rare and lack spatial distribution features. In this study, image-based techniques were used to quantify and monitor flash floods in wadi channels by using two different methods. In the first section, we employed photogrammetry processing technique to quantify post-peak flood discharges by using a drone survey to build a digital elevation model (DEM) with a high resolution and calibrated and validated the model with a field survey (levelling measurements). This technique used drone-collected images to construct a DEM for extracting a cross-sectional profile and elevation points to calculate the peak discharge using the slope-area method with the Manning equation. In the second section, we combined the previous technique with the large-scale particle image velocimetry (LSPIV) technique to measure flash flood discharge by installing a fixed camera on a road bridge crossing a wadi channel and using a digitally extracted cross section from the DEM in the analysis. The results of those techniques show a high efficiency that is equivalent to that of conventional methods.
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Macelloni, Myrta Maria, Elisabetta Corte, Andrea Ajmar, Alberto Cina, Fabio Giulio Tonolo, Paolo Felice Maschio et Isabella Nicole Pisoni. « Multi-platform, Multi-scale and Multi-temporal 4D Glacier Monitoring. The Rutor Glacier Case Study ». Dans Geomatics for Green and Digital Transition, 392–404. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-17439-1_29.

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AbstractAt present most alpine glaciers are not in equilibrium with the current climate, as a result they are undergoing a dramatic mass loss. Monitoring glacial variations is crucial to assess the consequences of climate change on the territory. In this work different geomatics techniques are exploited to measure and monitor the Rutor glacier over the years. In this study two different techniques were adopted to generate 3 digital surface models (DSMs): aerial and satellite photogrammetry. Two photogrammetric aerial surveys were carried out: at the end of the hydrological year 2019/20 and at the end of the following hydrological year. Additionally, a very high-resolution satellite stereo pair, acquired by the Pléiades-1A platform in 2017, was processed to assess whether satellite images can be applied to extract the 3D surface of the Rutor glacier. In order to evaluate the Rutor glacier mass-balance throughout the years several reference points were positioned and measured before the 2021 aerial flight. Thanks to the presence of the materialized points the 2021 model is considered as the ‘Reference Model’ against which subsequent models can be compared for glacier analysis. This model was validated by means of a comparison with the authoritative Regional DSM based on LiDAR surveys. In alpine glaciers, the positioning of artificial square cross target in time invariant areas is crucial to enable a multitemporal 4D analysis. The use of very high-resolution satellite imagery allows large areas to be mapped in 3D, but with lower accuracies proportionally decreasing with respect to slope and exposure.
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Maas, H. G. « Contributions of Digital Photogrammetry to 3-D PTV ». Dans Three-Dimensional Velocity and Vorticity Measuring and Image Analysis Techniques, 191–207. Dordrecht : Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-015-8727-3_9.

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Tian, Jiuling. « Mountain Monitoring System Based on the Digital Photogrammetry and the Component GIS ». Dans Data Processing Techniques and Applications for Cyber-Physical Systems (DPTA 2019), 1393–99. Singapore : Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-1468-5_164.

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Zhang, Zimin, Ying Zhou, Jian Cui et Hao Liu. « An Improved Method of Building Rapid 3D Modeling Based on Digital Photogrammetric Technique ». Dans Communications in Computer and Information Science, 175–80. Berlin, Heidelberg : Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-45498-5_20.

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Gervasi, Osvaldo, Damiano Perri, Marco Simonetti et Sergio Tasso. « Strategies for the Digitalization of Cultural Heritage ». Dans Computational Science and Its Applications – ICCSA 2022 Workshops, 486–502. Cham : Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-10592-0_35.

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AbstractThe COVID-19 pandemic caused despair, poverty and, above all, pain and death across the planet. Nevertheless, there is no doubt that it has also given a strong global impetus to the digital world, asserting its importance, sustainability and richness of perspectives. With our work we intend to establish a set of best practices aimed at defining methods and technologies that will enable those fascinated by digital technologies to contribute effectively to the digitisation of cultural heritage on a large scale. Various aspects that play a crucial role in the digitisation of artifacts will be discussed, with a focus on the issues involved in the manual realisation of works using Blender and Unity software. For demonstration purposes, two very popular use cases in the Umbria region of Italy are presented: “Piazza IV Novembre” in Perugia with the magnificent “Fontana Maggiore”, the “Palazzo dei Priori” and the Duomo on one side and the Republic square in Foligno on the other, with the Duomo, the Bishop’s house and the Diocesan Museum, the Town Hall and “Palazzo Trinci”. The first realization was carried out using photogrammetry techniques, the software Blender and Unity, while the second was carried out exclusively with Blender and Unity.The theme is highly relevant in Europe, particularly Italy, where the topic is part of the post-COVID-19 National Recovery and Resilience Plan (NRRP).
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Ortega, Ana I., Francisco Ruiz, Miguel A. Martín, Alfonso Benito-Calvo, Marco Vidal, Lucía Bermejo et Theodoros Karampaglidis. « Prehistoric Human Tracks in Ojo Guareña Cave System (Burgos, Spain) : The Sala and Galerías de las Huellas ». Dans Reading Prehistoric Human Tracks, 317–42. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-60406-6_17.

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AbstractIn 1969, members of Grupo Espeleológico Edelweiss discovered the Sala and Galerías de las Huellas in Ojo Guareña Cave system (Burgos, Spain). These contained hundreds of ancient human footprints, preserved in the soft sediment on the floor. These footprints represent the tracks of a small group of people who walked barefoot through these complex passages in the cave. Owing to the difficult compatibility of the documentation and preservation of these prints, it was not possible to study them before the development of new non-invasive remote sensing techniques. However, since 2012 optical laser scanning and digital photogrammetry have been used in Galerías de las Huellas, in combination with GIS techniques, to obtain a model of the cave floor, where the footprints and their internal morphology can be observed in detail. We have identified over 1000 prehistoric human footprints and at least 18 distinct trackways through the passages, which could have been left by around 8–10 individuals. Since 2016, an archaeological field study has been conducted in this sector, in order to determine and explore its surrounding area and find other archaeological evidence that may be directly associated with these tracks. Numerous remains of torches are preserved on the walls and floor in the immediate surroundings of the footprint sites. Some of them have been dated, which has revealed the intensive use of this underground landscape from the Upper Palaeolithic to the Mesolithic-Neolithic. However, the remains in Sala and Galerías de las Huellas date solely to the Chalcolithic, around 4300 calBP.
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Carr, Jennifer, Christopher Niezrecki et Peter Avitabile. « Full Field Dynamic Strain on Wind Turbine Blade Using Digital Image Correlation Techniques and Limited Sets of Measured Data from Photogrammetric Targets ». Dans Dynamics of Coupled Structures, Volume 1, 317–28. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-04501-6_30.

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Lucarelli, Rita, et Kea Johnston. « Ancient Egyptian Coffins in 3D : Digital Analysis, Visualization, and Dissemination ». Dans Preserving Cultural Heritage in the Digital Age : Sending Out an S.O.S., 110–24. Equinox Publishing Ltd., 2022. http://dx.doi.org/10.1558/equinox.42597.

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This chapter discusses the importance of digital data capture techniques such as digital photogrammetry for expanding access to texts carved on Egyptian sarcophagi by creating collections of digitized large mortuary objects. Such large objects are often stored in museum warehouses and not easily shared with scholars and the public. By providing a thorough explanation of the digital techniques and results of the “Book of the Dead in 3D” project at UC Berkeley, this chapter highlights the significance of conducting text analysis on the 3D models of the coffins by creating interactive annotations--including text transcription and translation of the magical spells--on the digital models themselves. This kind of embedded metadata is critical to scholars of Egyptology. The case study presented--the sarcophagus of Psamtik in the collections of the Phoebe Hearst Museum at Berkeley--describes in detail the technique of digital photogrammetry combined with custom programming to create the annotated 3D models.
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Actes de conférences sur le sujet "Digital photogrammetry technique"

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Frankenberger, J. R., C. Huang et K. Nouwakpo. « Low-Altitude Digital Photogrammetry Technique to Assess Ephemeral Gully Erosion ». Dans IGARSS 2008 - 2008 IEEE International Geoscience and Remote Sensing Symposium. IEEE, 2008. http://dx.doi.org/10.1109/igarss.2008.4779670.

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Pottler, Klaus, Eckhard Lu¨pfert, Glen H. G. Johnston et Mark R. Shortis. « Photogrammetry : A Powerful Tool for Geometric Analysis of Solar Concentrators and Their Components ». Dans ASME 2004 International Solar Energy Conference. ASMEDC, 2004. http://dx.doi.org/10.1115/isec2004-65117.

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Digital close range photogrammetry has proven to be a precise and efficient measurement technique for the assessment of shape accuracies of solar concentrators and their components. The combination of high quality mega-pixel digital still cameras, appropriate software and calibrated reference scales in general is sufficient to provide coordinate measurements with precisions of 1:50,000 or better. The extreme flexibility of photogrammetry to provide high accuracy 3-D coordinate measurements over almost any scale makes it particularly appropriate for the measurement of solar concentrator systems. It can also provide information for the analysis of curved shapes and surfaces, which can be very difficult to achieve with conventional measurement instruments. The paper gives an overview of quality indicators for photogrammetric networks, which have to be considered during the data evaluation to augment the measurement precision. A selection of measurements done on whole solar concentrators and their components are presented. The potential of photogrammetry is demonstrated by presenting measured effects arising from thermal expansion and gravitational forces on selected components. The measured surface data can be used to calculate slope errors and undertake raytrace studies to compute intercept factors and assess concentrator qualities.
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Nica, Dragos-Constantin. « ASPECTS ON DIGITAL CADASTRAL MAP OF IASI CITY CREATED BY MEANS OF DIGITAL PHOTOGRAMMETRY TECHNIQUE ». Dans 14th SGEM GeoConference on INFORMATICS, GEOINFORMATICS AND REMOTE SENSING. Stef92 Technology, 2014. http://dx.doi.org/10.5593/sgem2014/b23/s10.003.

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Morris, Andrew, John Dear, Miltiadis Kourmpetis, Alexander Fergusson et Amit Puri. « Digital Speckle Photogrammetry Techniques Applied to Monitoring High Temperature Steam Pipes ». Dans ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/pvp2006-icpvt-11-93066.

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Digital Speckle Photogrammetry (DSP) is proving to be a very useful technique for studying, in the laboratory, the distribution of strain about cracks and other defects in stressed specimens. This non-contact technique is able to resolve strain gradients over a small physical area, for example across a weld heat affected zone. The technique has good potential for use as a condition monitoring tool for a variety of components in electrical power stations. In addition this measurement technique could also be applied to monitor the integrity of critical components of newer generation plant, such as wind turbine generator blades. There are, however, many installation problems to be overcome. For example, there is the need to have regard for the hostile environment in steam generating plant and the demanding conditions to which wind turbine blades are subjected. Ideally the outputs from individual DSP sensors would be used for continuous remote monitoring. However, DSP measurements can also be useful each time the plant is shut down during a plant outage; which would be used to complement data from existing proven rugged monitoring methods. This paper describes ongoing work to develop a ruggedised digital speckle ‘sensor’ and associated image capture system.
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Vincent, Mahamadaly, Urbina Bareto Isabel, Fréchon Louis, Pinel Romain, Garnier Rémi et Deslarzes Kenneth. « Underwater Photogrammetry as an Environmental Assessment Tool to Monitor Coral Reefs and Artificial Structures ». Dans Offshore Technology Conference. OTC, 2021. http://dx.doi.org/10.4043/31025-ms.

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Abstract Over the past decade, photogrammetry has grown considerably thanks to technical advances in digital cameras and computing performance. Popular in terrestrial applications with the development of UAV acquisition, photogrammetry provides access to accurate scene reconstruction, high-resolution measurements, and temporal comparisons with a wide range of geolocated and scaled 2D and 3D supports. Nowadays, photogrammetry represents a particular challenge in the underwater field such as environmental monitoring, marine construction, technical inspection, and archaeology. Our study aims to develop underwater acquisition protocols and new tools for marine resources surveys and management to understand the role of 3D characteristics in both coral reefs and artificial structures. Two specific protocols were designed and optimized to reconstruct from coral colonies to coral reefs and artificial structures (up to 500m²) with a mean resolution of 0.05cm/pixel. Here several quantitative descriptors based on 2D and 3D metrics (such as slope, length, surface, volume, rugosity) were calculated for morphological studies and temporal comparisons. The photogrammetric technique now offers higher quality and accuracy tools compared to traditional survey methods. These advantages make possible to access to new scientific surveys of underwater ecosystems and as environmental management tools may prove to be valuable for future.
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Michele, Mangiameli, Mussumeci Giuseppe et Zito Salvatore. « Low cost digital photogrammetry : From the extraction of point clouds by SFM technique to 3D mathematical modeling ». Dans INTERNATIONAL CONFERENCE OF NUMERICAL ANALYSIS AND APPLIED MATHEMATICS (ICNAAM 2016). Author(s), 2017. http://dx.doi.org/10.1063/1.4997618.

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Kuklys, Indrius, Dainora Jankauskienė, Lina Kuklienė et Birutė Ruzgienė. « Some aspects on mapping technologies used for capturin and modelling of small architectural objects ». Dans Research for Rural Development 2021 : annual 27th International scientific conference proceedings. Latvia University of Life Sciences and Technologies, 2021. http://dx.doi.org/10.22616/rrd.27.2021.037.

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The mapping of protected architectural heritage objects acquiring valuable geoinformation data is relevant today and in the future. The research is based on detection the preferable mapping technique for inspection and capturing the position of small architectural objects in public space, presenting the real geographic/ cartographic information for consumers in appropriate digital environment. The analysis and discussion involve the definition of appropriate technology, implementing goals of the culture strategy in Lithuania, preserving and updating information about cultural monuments, creating the open access to everyone. Applying different techniques, two projects were realized: 1) the mapping and 3D modelling of sculptures in public space – small objects of city park; 2) the mapping of architectural heritage object – field museum, located in open territory with natural topography. Up-to-date mapping/ surveying methodologies as Remote Sensing (RS), Aerial Photogrammetry, Terrestrial Lidar Scanning (TLS), specialized geoinformation systems, UAV-Photogrammetry and classical surveying have been used for providing the spatial products of area topography and 3D models of any architectural objects, opening up cultural values of protected unique objects for the public and allows them to be easily accessed remotely. The analysis of results deals with applicability of TLS technique, that provides effectiveness of 3D modelling and UAV-Photogrammetry with high resolution of aerial imaging and modelling solution. Some disadvantages have been highlighted on the use of orthophoto map for Geographic Information Systems (GIS) needs.
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Mirzazade, Ali, Cosmin Popescu, Thomas Blanksvärd et Björn Täljsten. « Application of close range photogrammetry in structural health monitoring by processing generated point cloud datasets ». Dans IABSE Congress, Ghent 2021 : Structural Engineering for Future Societal Needs. Zurich, Switzerland : International Association for Bridge and Structural Engineering (IABSE), 2021. http://dx.doi.org/10.2749/ghent.2021.0450.

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<p>In bridge inspection, vertical displacement is a relevant parameter for both short and long-term health monitoring. Assessing change in deflections could also simplify the assessment work for inspectors. Recent developments in digital camera technology and photogrammetry software enables point cloud with colour information (RGB values) to be generated. Thus, close range photogrammetry offers the potential of monitoring big and small-scale damages by point clouds. The current paper aims to monitor geometrical deviations in Pahtajokk Bridge, Northern Sweden, using an optical data acquisition technique. The bridge in this study is scanned two times by almost one year a part. After point cloud generation the datasets were compared to detect geometrical deviations. First scanning was carried out by both close range photogrammetry (CRP) and terrestrial laser scanning (TLS), while second scanning was performed by CRP only. Analyzing the results has shown the potential of CRP in bridge inspection.</p>
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Buchón-Moragues, Fernando, David Sánchez-Jiménez, Jesús Palomar-Vázquez et Guillermo Peris-Fajarnés. « PROCESAMIENTO AUTOMATIZADO DE MODELOS TRIDIMENSIONALES DE ÚLCERAS CUTÁNEAS ». Dans 1st Congress in Geomatics Engineering. Valencia : Universitat Politècnica València, 2017. http://dx.doi.org/10.4995/cigeo2017.2017.6553.

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Geomatics includes techniques such as photogrammetry, remote sensing and geographic information systems, which provide applicable tools in various areas of biomedicine, for example skin ulcer measurement. In previous projects we developed procedures for acquiring data and measuring skin ulcers using a digital photo camera, a manual scanner and photogrammetry software based on correlation. We have tested our technique in a randomized clinical trial in patients with chronic leg ulcers. In the present project an application system is created with the following objectives: automate the processing of three-dimensional models of cutaneous ulcers and generate documentation that ease the interpretation of the evolution of skin ulcers by medical personnel (including PDF report, AVI animation and XOS augmented reality project). We also created a website prototype that stores the documentation, allowing registered users to upload photographs and consult or modify the database of skin ulcers. A test is performed with 50 cutaneous leg ulcers, in order to debug and improve the application system and the website prototype.http://dx.doi.org/10.4995/CIGeo2017.2017.6553
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« Development of Scum Geometrical Monitoring Beneath Floating Covers Aided by UAV Photogrammetry ». Dans Structural Health Monitoring. Materials Research Forum LLC, 2021. http://dx.doi.org/10.21741/9781644901311-9.

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Abstract. Floating covers are used on anaerobic lagoons at waste-water treatment plants for odour control and the harvesting of biogas. Scum is an unwanted by-product of the anaerobic digestion of raw sewage. This matter can form into a large mass of material, and when it floats to the surface and solidifies, it is called a scumberg to differentiate it from the scum which may still be in a semi-solid state. Given the continual inflow of raw sewage into the lagoon, the potential movement of the scum can deform the floating cover. One of the challenges pertaining to the structural health assessment of the floating cover hinges upon the difficulty in monitoring the development and geometrical profile of scum underneath the cover. The current measurement of scum requires the inspector to physically access the scum either from multiple discrete access ports within the floating cover or by using highly-skilled divers in the lagoon. In collaboration with Melbourne Water, a non-contact UAV-aided photogrammetry technique has been deployed to quantify the development of scum underneath the cover. It is shown that the digital elevation model obtained from photogrammetry correlates well with direct laser based measurements of elevation, and that cluster analysis can be used in conjunction with the digital elevation model to estimate the qualitative hardness level of the scum beneath the cover, thereby providing a viable alternative to time-consuming walk the cover type inspections. It is also shown that the total scum depth as predicted from the digital elevation model correlates well with the measurements taken through the access ports. This method could be a more effective alternative to current practice.
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Rapports d'organisations sur le sujet "Digital photogrammetry technique"

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Bhatt, Parth, Curtis Edson et Ann MacLean. Image Processing in Dense Forest Areas using Unmanned Aerial System (UAS). Michigan Technological University, septembre 2022. http://dx.doi.org/10.37099/mtu.dc.michigantech-p/16366.

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Imagery collected via Unmanned Aerial System (UAS) platforms has become popular in recent years due to improvements in a Digital Single-Lens Reflex (DSLR) camera (centimeter and sub-centimeter), lower operation costs as compared to human piloted aircraft, and the ability to collect data over areas with limited ground access. Many different application (e.g., forestry, agriculture, geology, archaeology) are already using and utilizing the advantages of UAS data. Although, there are numerous UAS image processing workflows, for each application the approach can be different. In this study, we developed a processing workflow of UAS imagery collected in a dense forest (e.g., coniferous/deciduous forest and contiguous wetlands) area allowing users to process large datasets with acceptable mosaicking and georeferencing errors. Imagery was acquired with near-infrared (NIR) and red, green, blue (RGB) cameras with no ground control points. Image quality of two different UAS collection platforms were observed. Agisoft Metashape, a photogrammetric suite, which uses SfM (Structure from Motion) techniques, was used to process the imagery. The results showed that an UAS having a consumer grade Global Navigation Satellite System (GNSS) onboard had better image alignment than an UAS with lower quality GNSS.
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