Relevant bibliographies by topics / Multimedia photogrammetrie

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Multimedia photogrammetrie'

Author: Grafiati
Published: 4 June 2021
Last updated: 3 February 2022

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Journal articles on the topic "Multimedia photogrammetrie"

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Maas, H. G. "A MODULAR GEOMETRIC MODEL FOR UNDERWATER PHOTOGRAMMETRY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-5/W5 (April 9, 2015): 139–41. http://dx.doi.org/10.5194/isprsarchives-xl-5-w5-139-2015.

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Underwater applications of photogrammetric measurement techniques usually need to deal with multimedia photogrammetry aspects, which are characterized by the necessity of handling optical rays that are broken at interfaces between optical media with different refrative indices according to Snell’s Law. This so-called multimedia geometry has to be incorporated into geometric models in order to achieve correct measurement results. <br><br> The paper shows a flexible yet strict geometric model for the handling of refraction effects on the optical path, which can be implemented as a module into photogrammetric standard tools such as spatial resection, spatial intersection, bundle adjustment or epipolar line computation. The module is especially well suited for applications, where an object in water is observed by cameras in air through one or more plane parallel glass interfaces, as it allows for some simplifications here.
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Tucci, G., E. I. Parisi, V. Bonora, L. Fiorini, A. Conti, M. Corongiu, J. P. Ortiz-Sanz, M. Gil-Docampo, T. Rego-Sanmartín, and M. Arza-García. "IMPROVING QUALITY AND INCLUSIVE EDUCATION ON PHOTOGRAMMETRY: NEW TEACHING APPROACHES AND MULTIMEDIA SUPPORTING MATERIALS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B5-2020 (August 24, 2020): 257–64. http://dx.doi.org/10.5194/isprs-archives-xliii-b5-2020-257-2020.

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Abstract. The democratization and accessibility of low-cost devices for image acquisition and the development of highly automated procedures for orientation and dense image matching allow almost every person to be a potential producer of photogrammetric models. The diffusion of image-based technologies to produce 3D models amongst wider audiences entails however some risks, as the lack of critical awareness of the final quality of the outputs. Information and education about potentialities and limitations of reality-based digitization by photogrammetry may help spreading procedures and methods for the correct use of this technology. This paper presents the results of one of the funded projects within the 2018 ISPRS Capacity Building Initiatives “Education and training resources on digital photogrammetry”. The production of multimedia material for supporting smart educational teaching and learning approaches will be reported, as well as experiences on their application on case studies. Blended innovative teaching and learning pedagogical approaches have been tested, as Flipped Classroom (FC), Learning-by-doing (LBD), Collaborative Learning (CL), and Challenge-Based Learning (CBL), supported by multimedia tools for capacity-building and knowledge transfer. The implementation of multimedia materials for supporting teaching strategies resulted in the production of updated and engaging resources, as videos, tutorials, and datasets to be used during courses, workshops, and seminars targeted to different user groups. The combination of teaching strategies and multimedia supporting materials were tested within national and international projects, from academic courses to complete non-experts, from activities on the field to online and distance learning.
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Waters, R. S. "Photogrammetry for GIS: The Multimedia Revolution." Photogrammetric Record 15, no. 87 (April 1996): 353–64. http://dx.doi.org/10.1111/0031-868x.00039.

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Maas, Hans-Gerd. "On the Accuracy Potential in Underwater/Multimedia Photogrammetry." Sensors 15, no. 8 (July 24, 2015): 18140–52. http://dx.doi.org/10.3390/s150818140.

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Kahmen, O., R. Rofallski, N. Conen, and T. Luhmann. "ON SCALE DEFINITION WITHIN CALIBRATION OF MULTI-CAMERA SYSTEMS IN MULTIMEDIA PHOTOGRAMMETRY." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W10 (April 17, 2019): 93–100. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w10-93-2019.

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<p><strong>Abstract.</strong> In multimedia photogrammetry, multi-camera systems often provide scale by a calibrated relative orientation. Camera calibration via bundle adjustment is a well-established standard procedure in single-medium photogrammetry. When using standard software and applying the collinearity equations in multimedia photogrammetry, the refractive interfaces are modelled in an implicit form. This contribution analyses different calibration strategies for bundle-invariant interfaces. To evaluate the effects of implicitly modelling the refractive effects within a bundle adjustment, synthetic datasets are simulated. Contrary to many publications, systematic effects of the exterior orientations can be verified with simulated data. The behaviour of interior, exterior and relative orientation parameters is analysed using error-free synthetic datasets. The relative orientation of a stereo camera shows systematic effects, when the angle of convergence varies and when the synthetic interface is set up at different distances to the camera. It becomes clear, that in most cases the implicit modelling is not suitable for multimedia photogrammetry. An explicit modelling of the refractive interfaces is implemented into a bundle adjustment. This strict model is analysed and compared with the implicit form regarding systematic effects in orientation parameters as well as errors in object space. In a real experiment, the discrepancies between the implicit form using standard software and the explicit modelling using our own implementation are quantified. It is highly advisable to model the interfaces strictly, since the implicit modelling might lead to relevant errors in object space.</p>
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Capra, A., M. Dubbini, E. Bertacchini, C. Castagnetti, and F. Mancini. "3D RECONSTRUCTION OF AN UNDERWATER ARCHAELOGICAL SITE: COMPARISON BETWEEN LOW COST CAMERAS." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XL-5/W5 (April 9, 2015): 67–72. http://dx.doi.org/10.5194/isprsarchives-xl-5-w5-67-2015.

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The 3D reconstruction with a metric content of a submerged area, where objects and structures of archaeological interest are found, could play an important role in the research and study activities and even in the digitization of the cultural heritage. The reconstruction of 3D object, of interest for archaeologists, constitutes a starting point in the classification and description of object in digital format and for successive fruition by user after delivering through several media. The starting point is a metric evaluation of the site obtained with photogrammetric surveying and appropriate 3D restitution. The authors have been applying the underwater photogrammetric technique since several years using underwater digital cameras and, in this paper, digital low cost cameras (off-the-shelf). Results of tests made on submerged objects with three cameras are presented: © Canon Power Shot G12, © Intova Sport HD e © GoPro HERO 2. The experimentation had the goal to evaluate the precision in self-calibration procedures, essential for multimedia underwater photogrammetry, and to analyze the quality of 3D restitution. Precisions obtained in the calibration and orientation procedures was assessed by using three cameras, and an homogeneous set control points. Data were processed with © Agisoft Photoscan. Successively, 3D models were created and the comparison of the models derived from the use of different cameras was performed. Different potentialities of the used cameras are reported in the discussion section. The 3D restitution of objects and structures was integrated with sea bottom floor morphology in order to achieve a comprehensive description of the site. A possible methodology of survey and representation of submerged objects is therefore illustrated, considering an automatic and a semi-automatic approach.
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Kahmen, Oliver, Robin Rofallski, and Thomas Luhmann. "Impact of Stereo Camera Calibration to Object Accuracy in Multimedia Photogrammetry." Remote Sensing 12, no. 12 (June 26, 2020): 2057. http://dx.doi.org/10.3390/rs12122057.

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Camera calibration via bundle adjustment is a well-established standard procedure in single-medium photogrammetry. When using standard software and applying the collinearity equations in multimedia photogrammetry, the effects of refractive interfaces are compensated in an implicit form, hence by the usual parameters of interior orientation. This contribution analyses different calibration strategies for planar bundle-invariant interfaces. To evaluate the effects of implicitly modelling the refractive effects within bundle adjustment, synthetic error-free datasets are simulated. The behaviour of interior, exterior, and relative orientation parameters is analysed using synthetic datasets free of underwater imaging effects. A shift of the camera positions of 0.2% of the acquisition distance along the optical axis can be observed. The relative orientation of a stereo camera shows systematic effects when the angle of convergence varies. The stereo baseline increases by 1% at 25° convergence. Furthermore, the interface is set up at different distances to the camera. When the interface is at 50% distance assuming a parallel camera setup, the stereo baseline also increases by 1%. It becomes clear that in most cases the implicit modelling is not suitable for multimedia photogrammetry due to geometrical errors (scaling) and absolute positioning errors. Explicit modelling of the refractive interfaces is implemented into a bundle adjustment and is also used to analyse calibration parameters and deviations in object space. Real experiments show that it is difficult to separate the effects of implicit modelling, since other effects, such as poor image measurements, affect the final result. However, trends can be seen, and deviations are quantified.
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Nocerino, E., F. Menna, and A. Gruen. "BUNDLE ADJUSTMENT WITH POLYNOMIAL POINT-TO-CAMERA DISTANCE DEPENDENT CORRECTIONS FOR UNDERWATER PHOTOGRAMMETRY." International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLIII-B2-2021 (June 28, 2021): 673–79. http://dx.doi.org/10.5194/isprs-archives-xliii-b2-2021-673-2021.

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Abstract. Uncontrolled refraction of optical rays in underwater photogrammetry is known to reduce its accuracy potential. Several strategies have been proposed aiming at restoring the accuracy to levels comparable with photogrammetry applied in air. These methods are mainly based on rigours modelling of the refraction phenomenon or empirical iterative refraction corrections. The authors of this contribution have proposed two mitigation strategies of image residuals systematic patterns in the image plane: (i) empirical weighting of image observations as function of their radial position; (ii) iterative look-up table corrections computed in a squared grid. Here, a novel approach is developed. It explicitly takes into account the object point-to-camera distance dependent error introduced by refraction in multimedia photogrammetry. A polynomial correction function is iteratively computed to correct the image residuals clustered in radial slices in the image plane as function of the point-to-camera distance. The effectiveness of the proposed method is demonstrated by simulations that allow to: (i) separate the geometric error under investigation from other effects not easily modellable and (ii) have reliable reference data against which to assess the accuracy of the result.
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Lerma García, José Luis, Miriam Cabrelles López, Santiago Navarro Tarín, and Sergio Galcerá Ustero. "Documentación 3D y visualización multimedia de la Cova del Parpalló (Gandia)." Virtual Archaeology Review 1, no. 2 (May 25, 2010): 123. http://dx.doi.org/10.4995/var.2010.4701.

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<p>The three-dimensional (3D) documentation by means of laser scanning and photogrammetry eases exhaustive recording, the right lecture of cultural heritage objects and its analysis in order to, on the one hand, adopt appropriate decisions and interventions, on the other hand, move forward the generation of virtual animated replicas of great value and smooth multimedia dissemination. The present paper tackles the different stages of graphic documentation and visualization undertaken in the Parpalló Cave (Cova del Parpalló), Gandia, Valencia. Besides traditional surveying documentation that is based on planimetric and altimetric maps, this paper presents the plotting and animated visualization of the Palaeolithic set not only making use of lights and shadows but also from photorealistic textured 3D models.</p>
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Guarnieri, A., F. Fissore, A. Masiero, and A. Vettore. "FROM TLS SURVEY TO 3D SOLID MODELING FOR DOCUMENTATION OF BUILT HERITAGE: THE CASE STUDY OF PORTA SAVONAROLA IN PADUA." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W5 (August 18, 2017): 303–8. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w5-303-2017.

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It is a matter of fact that 3D visualisation and proper documentation of cultural objects helps to preserve the history and memories of historic buildings, archaeological sites and cultural landscapes, and supports economic growth by stimulating cultural tourism. Preservation, visualisation and recreation of valuable historical and architectural objects and places has always been a serious challenge for specialists in the field. Today, the rapid developments in the fields of close-range photogrammetry, terrestrial laser scanning (TLS) and computer vision (CV) enable to carry out highly accurate 3D models so as to be extremely effective and intuitive for users who have stringent requirements and high expectations. In this note we present the results of the survey and 3D modeling of an ancient gate, Porta Savonarola, located within the remains of the medieval town walls surrounding the historical city center of Padua, Italy. The work has been undertaken within the framework of the project “Walls Multimedia Museum” (WMM) promoted by the local private association “Padua Walls Committee”. The goal of the project was to develop a prototype of an “extended” virtual museum, spreaded along most interesting locations of the town walls. The survey of the ancient gate was performed with a Leica C10 and P20 terrestrial laser scanners. Once the acquired scans were properly merged together, a solid model was generated from the global point cloud, and plans and elevations were extracted from it for restoration purposes. A short multimedia video was also created for the “Walls Multimedia Museum”, showing both the outer and inner part of the gate. In the paper we will discuss all the steps and challenges addressed to provide the 3D solid model of Porta Savonarola from the TLS data.
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Dissertations / Theses on the topic "Multimedia photogrammetrie"

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Putze, Torsten. "Geometrische und stochastische Modelle zur Optimierung der Leistungsfähigkeit des Strömungsmessverfahrens 3D-PTV." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1231402875520-12137.

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Die 3D Particle Tracking Velocimetry (3D PTV) ist eine Methode zur bildbasierten Bestimmung von Geschwindigkeitsfeldern in Gas- oder Flüssigkeitsströmungen. Dazu wird die Strömung mit Partikeln markiert und durch ein Mehrkamerasystem beobachtet. Das Ergebnis der Datenauswertung sind 3D Trajektorien einer großen Anzahl von Partikeln, die zur statistischen Analyse der Strömung genutzt werden können. In der vorliegenden Arbeit werden verschiedene neu entwickelte Modelle gezeigt, die das Einsatzspektrum vergrößern und die Leistungsfähigkeit der 3D PTV erhöhen. Wesentliche Neuerungen sind der Einsatz eines Spiegelsystems zur Generierung eines virtuellen Kamerasystems, die Modellierung von komplex parametrisierten Trennflächen der Mehrmedienphotogrammetrie, eine wahrscheinlichkeitsbasierte Trackingmethode sowie eine neuartige Methode zur tomographischen Rekonstruktion von Rastervolumendaten. Die neuen Modelle sind an drei realen Experimentieranlagen und mit synthetischen Daten getestet worden. Durch den Einsatz eines Strahlteilers vor dem Objektiv einer einzelnen Kamera und vier Umlenkspiegeln, positioniert im weiteren Strahlengang, werden vier virtuelle Kameras generiert. Diese Methode zeichnet sich vor allem durch die Wirtschaftlichkeit als auch durch die nicht notwendige Synchronisation aus. Vor allem für die Anwendung im Hochgeschwindigkeitsbereich sind diese beiden Faktoren entscheidend. Bei der Beobachtung von Phänomenen in Wasser kommt es an den Trennflächen verschiedener Medien zur optischen Brechung. Diese muss für die weitere Auswertung zwingend modelliert werden. Für komplexe Trennflächen sind einfache Ansätze über zusätzliche Korrekturterme nicht praktikabel. Der entwickelte Ansatz basiert auf der mehrfachen Brechung jedes einzelnen Bildstrahls. Dazu müssen die Trennflächenparameter und die Kameraorientierungen im selben Koordinatensystem bekannt sein. Zumeist wird die Mehrbildzuordnung von Partikeln durch die Verwendung von Kernlinien realisiert. Auf Grund von instabilen Kameraorientierungen oder bei einer sehr hohen Partikeldichte sind diese geometrischen Eigenschaften nicht mehr ausreichend, um die Mehrbildzuordnung zu lösen. Unter der Ausnutzung weiterer geometrischer, radiometrischer und physikalischer Eigenschaften kann die Bestimmung der 3D Trajektorien dennoch durchgeführt werden. Dabei werden durch die Analyse verschiedener Merkmale diejenigen ausgewählt, welche sich für die spatio-temporale Zuordnung eignen. Die 3D PTV beruht auf der Diskretisierung der Partikelabbildungen im Bildraum und der anschließenden Objektkoordinatenbestimmung. Eine rasterbasierte Betrachtungsweise stellt die tomographische Rekonstruktion des Volumens dar. Hierbei wird die Intensitätsverteilung wird im Volumen rekonstruiert. Die Bewegungsinformationen werden im Anschluss aus den Veränderungen aufeinander folgender 3D-Bilder bestimmt. Durch dieses Verfahren können Strömungen mit einer höheren Partikeldichte im Volumen analysiert werden. Das entwickelte Verfahren basiert auf der schichtweisen Entzerrung und Zusammensetzung der Kamerabilder. Die entwickelten Modelle und Ansätze sind an verschiedenen Versuchsanlagen erprobt worden. Diese unterschieden sich stark in der Größe (0,5 dm³ – 20 dm³ – 130 m³) und den vorherrschenden Strömungsgeschwindigkeiten (0,3 m/s – 7 m/s – 0,5 m/s)
3D Particle Tracking Velocimetry (3D PTV) is an image based method for flow field determination. It is based on seeding a flow with tracer particles and recording the flow with a multi camera system. The results are 3D trajectories of a large number of particles for a statistical analysis of the flow. The thesis shows different novel models to increase the spectrum of applications and to optimize efficiency of 3D PTV. Central aspects are the use of the mirror system to generate a virtual multi camera system, the modelling of complex interfaces of multimedia photogrammetry, a probability based tracking method and a novel method for tomographic reconstruction of volume raster data. The improved models are tested in three real testing facilities and with synthetic data. Using a beam splitter in front of the camera lens and deflecting mirrors arranged in the optical path, a four headed virtual camera system can be generated. This method is characterised by its economic efficiency and by the fact that a synchronisation is not necessary. These facts are important especially when using high speed cameras. When observing phenomena in water, there will be refraction at the different interfaces. This has to be taken into account and modelled for each application. Approaches which use correction terms are not suitable to handle complex optical interfaces. The developed approach is based on a multiple refraction ray tracing with known interface parameters and camera orientations. Mostly the multi image matching of particles is performed using epipolar geometry. Caused by the not stable camera orientation or a very high particle density this geometric properties are not sufficient to solve the ambiguities. Using further geometrical radiometrical and physical properties of particles, the determination of the 3D trajectories can be performed. After the analysis of different properties those of them are chosen which are suitable for spatio-temporal matching. 3D PTV bases on the discretisation of particle images in image space and the following object coordinate determination. A raster based approach is the tomographic reconstruction of the volume. Here the light intensity distribution in the volume will be reconstructed. Afterwards the flow information is determined from the differences in successive 3D images. Using tomographic reconstruction techniques a higher particle density can be analysed. The developed approach bases on a slice by slice rectification of the camera images and on a following assembly of the volume. The developed models and approaches are tested at different testing facilities. These differ in size (0.5 dm³ – 20 dm³ – 130 m³) and flow velocities (0.3 m/s – 7 m/s – 0.5 m/s)
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Putze, Torsten. "Geometrische und stochastische Modelle zur Optimierung der Leistungsfähigkeit des Strömungsmessverfahrens 3D-PTV." Doctoral thesis, Technische Universität Dresden, 2008. https://tud.qucosa.de/id/qucosa%3A23711.

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Die 3D Particle Tracking Velocimetry (3D PTV) ist eine Methode zur bildbasierten Bestimmung von Geschwindigkeitsfeldern in Gas- oder Flüssigkeitsströmungen. Dazu wird die Strömung mit Partikeln markiert und durch ein Mehrkamerasystem beobachtet. Das Ergebnis der Datenauswertung sind 3D Trajektorien einer großen Anzahl von Partikeln, die zur statistischen Analyse der Strömung genutzt werden können. In der vorliegenden Arbeit werden verschiedene neu entwickelte Modelle gezeigt, die das Einsatzspektrum vergrößern und die Leistungsfähigkeit der 3D PTV erhöhen. Wesentliche Neuerungen sind der Einsatz eines Spiegelsystems zur Generierung eines virtuellen Kamerasystems, die Modellierung von komplex parametrisierten Trennflächen der Mehrmedienphotogrammetrie, eine wahrscheinlichkeitsbasierte Trackingmethode sowie eine neuartige Methode zur tomographischen Rekonstruktion von Rastervolumendaten. Die neuen Modelle sind an drei realen Experimentieranlagen und mit synthetischen Daten getestet worden. Durch den Einsatz eines Strahlteilers vor dem Objektiv einer einzelnen Kamera und vier Umlenkspiegeln, positioniert im weiteren Strahlengang, werden vier virtuelle Kameras generiert. Diese Methode zeichnet sich vor allem durch die Wirtschaftlichkeit als auch durch die nicht notwendige Synchronisation aus. Vor allem für die Anwendung im Hochgeschwindigkeitsbereich sind diese beiden Faktoren entscheidend. Bei der Beobachtung von Phänomenen in Wasser kommt es an den Trennflächen verschiedener Medien zur optischen Brechung. Diese muss für die weitere Auswertung zwingend modelliert werden. Für komplexe Trennflächen sind einfache Ansätze über zusätzliche Korrekturterme nicht praktikabel. Der entwickelte Ansatz basiert auf der mehrfachen Brechung jedes einzelnen Bildstrahls. Dazu müssen die Trennflächenparameter und die Kameraorientierungen im selben Koordinatensystem bekannt sein. Zumeist wird die Mehrbildzuordnung von Partikeln durch die Verwendung von Kernlinien realisiert. Auf Grund von instabilen Kameraorientierungen oder bei einer sehr hohen Partikeldichte sind diese geometrischen Eigenschaften nicht mehr ausreichend, um die Mehrbildzuordnung zu lösen. Unter der Ausnutzung weiterer geometrischer, radiometrischer und physikalischer Eigenschaften kann die Bestimmung der 3D Trajektorien dennoch durchgeführt werden. Dabei werden durch die Analyse verschiedener Merkmale diejenigen ausgewählt, welche sich für die spatio-temporale Zuordnung eignen. Die 3D PTV beruht auf der Diskretisierung der Partikelabbildungen im Bildraum und der anschließenden Objektkoordinatenbestimmung. Eine rasterbasierte Betrachtungsweise stellt die tomographische Rekonstruktion des Volumens dar. Hierbei wird die Intensitätsverteilung wird im Volumen rekonstruiert. Die Bewegungsinformationen werden im Anschluss aus den Veränderungen aufeinander folgender 3D-Bilder bestimmt. Durch dieses Verfahren können Strömungen mit einer höheren Partikeldichte im Volumen analysiert werden. Das entwickelte Verfahren basiert auf der schichtweisen Entzerrung und Zusammensetzung der Kamerabilder. Die entwickelten Modelle und Ansätze sind an verschiedenen Versuchsanlagen erprobt worden. Diese unterschieden sich stark in der Größe (0,5 dm³ – 20 dm³ – 130 m³) und den vorherrschenden Strömungsgeschwindigkeiten (0,3 m/s – 7 m/s – 0,5 m/s).
3D Particle Tracking Velocimetry (3D PTV) is an image based method for flow field determination. It is based on seeding a flow with tracer particles and recording the flow with a multi camera system. The results are 3D trajectories of a large number of particles for a statistical analysis of the flow. The thesis shows different novel models to increase the spectrum of applications and to optimize efficiency of 3D PTV. Central aspects are the use of the mirror system to generate a virtual multi camera system, the modelling of complex interfaces of multimedia photogrammetry, a probability based tracking method and a novel method for tomographic reconstruction of volume raster data. The improved models are tested in three real testing facilities and with synthetic data. Using a beam splitter in front of the camera lens and deflecting mirrors arranged in the optical path, a four headed virtual camera system can be generated. This method is characterised by its economic efficiency and by the fact that a synchronisation is not necessary. These facts are important especially when using high speed cameras. When observing phenomena in water, there will be refraction at the different interfaces. This has to be taken into account and modelled for each application. Approaches which use correction terms are not suitable to handle complex optical interfaces. The developed approach is based on a multiple refraction ray tracing with known interface parameters and camera orientations. Mostly the multi image matching of particles is performed using epipolar geometry. Caused by the not stable camera orientation or a very high particle density this geometric properties are not sufficient to solve the ambiguities. Using further geometrical radiometrical and physical properties of particles, the determination of the 3D trajectories can be performed. After the analysis of different properties those of them are chosen which are suitable for spatio-temporal matching. 3D PTV bases on the discretisation of particle images in image space and the following object coordinate determination. A raster based approach is the tomographic reconstruction of the volume. Here the light intensity distribution in the volume will be reconstructed. Afterwards the flow information is determined from the differences in successive 3D images. Using tomographic reconstruction techniques a higher particle density can be analysed. The developed approach bases on a slice by slice rectification of the camera images and on a following assembly of the volume. The developed models and approaches are tested at different testing facilities. These differ in size (0.5 dm³ – 20 dm³ – 130 m³) and flow velocities (0.3 m/s – 7 m/s – 0.5 m/s).
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Book chapters on the topic "Multimedia photogrammetrie"

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Hoogeboom, Bart, Ivo Alberink, and Derk Vrijdag. "Photogrammetry in Digital Forensics." In Handbook of Digital Forensics of Multimedia Data and Devices, 183–218. Chichester, UK: John Wiley & Sons, Ltd, 2015. http://dx.doi.org/10.1002/9781118705773.ch5.

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Forlani, G., and E. S. Malinverni. "Dem and Orthophoto Generation in Close Range Photogrammetry." In Data Acquisition and Analysis for Multimedia GIS, 207–21. Vienna: Springer Vienna, 1996. http://dx.doi.org/10.1007/978-3-7091-2684-4_17.

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Boccardo, P., A. Lingua, and F. Rinaudo. "Geometric and Radiometric Calibration for Low Cost Flatbed Scanners for Photogrammetric Applications." In Data Acquisition and Analysis for Multimedia GIS, 151–60. Vienna: Springer Vienna, 1996. http://dx.doi.org/10.1007/978-3-7091-2684-4_13.

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Voulodimos, Athanasios, Eftychios Protopapadakis, Nikolaos Doulamis, and Anastasios Doulamis. "Image Clustering and Video Summarization for Efficient 3D Modelling and Reconstruction." In Recent Advances in 3D Imaging, Modeling, and Reconstruction, 193–214. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-5225-5294-9.ch009.

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Although high quality 3D representations of important cultural landmarks can be obtained via sophisticated photogrammetric techniques, their demands in terms of resources and expertise pose limitations on the scale at which such approaches are used. In parallel, the proliferation of multimedia content posted online creates new possibilities in terms of the ways that such rich content can be leveraged, but only after addressing the significant challenges associated with this content, including its massive volume, unstructured nature, and noise. In this chapter, two strategies are proposed for using multimedia content for 3D reconstruction: an image-based approach that employs clustering techniques to eliminate outliers and a video-based approach that extracts key frames via a summarization technique. In both cases, the reduced and outlier-free image data set is used as input to a structure from motion framework for 3D reconstruction. The presented techniques are evaluated on the basis of the reconstruction of two world-class cultural heritage monuments.
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Conference papers on the topic "Multimedia photogrammetrie"

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Esmaeili, Human, and Harold Thwaites. "Virtual photogrammetry." In 2016 22nd International Conference on Virtual System & Multimedia (VSMM). IEEE, 2016. http://dx.doi.org/10.1109/vsmm.2016.7863153.

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Majdik, Andras L., Laszlo Tizedes, Mate Bartus, and Tamas Sziranyi. "Photogrammetric 3D reconstruction of the old slaughterhouse in budapest." In 2016 International Workshop on Computational Intelligence for Multimedia Understanding (IWCIM). IEEE, 2016. http://dx.doi.org/10.1109/iwcim.2016.7801192.

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Urquhart, C. W., D. S. Green, and E. D. Borland. "4D capture using passive stereo photogrammetry." In 3rd European Conference on Visual Media Production (CVMP 2006). Part of the 2nd Multimedia Conference 2006. IEE, 2006. http://dx.doi.org/10.1049/cp:20061962.

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Ihlow, Alexander, Daniel Arndt, Felix Topf, Christoph Rothaug, Thomas Wittenberg, and Albert Heuberger. "Photogrammetric satellite service prediction - Correlation of RF measurements and image data." In 2011 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting (BMSB). IEEE, 2011. http://dx.doi.org/10.1109/bmsb.2011.5954884.

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Russo, Paolo, Alessio Furini, and Emanuela Gualdi. "Low cost photogrammetry for morphometric human detection in video surveillance." In 2012 18th International Conference on Virtual Systems and Multimedia (VSMM). IEEE, 2012. http://dx.doi.org/10.1109/vsmm.2012.6365987.

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Drap, Pierre, Djamal Merad, Jean-Marc Boi, Julien Seinturier, Daniela Peloso, Christophe Reidinger, Guido Vannini, Michele Nucciotti, and Elisa Pruno. "Photogrammetry for medieval archaeology: A way to represent and analyse stratigraphy." In 2012 18th International Conference on Virtual Systems and Multimedia (VSMM). IEEE, 2012. http://dx.doi.org/10.1109/vsmm.2012.6365920.

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Qiyu Yang, Guochuan Shi, Baolin Xie, and Shenghao Zhang. "Computer vision used in photogrammetry to build digital elevation model." In IET International Conference on Wireless Mobile and Multimedia Networks Proceedings (ICWMMN 2006). IEE, 2006. http://dx.doi.org/10.1049/cp:20061597.

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Belhi, Abdelhak, and Abdelaziz Bouras. "AI-powered Motion Interaction for 3D Cultural Heritage." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0240.

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Museums and cultural institutions, in general, are in a constant challenge of adding more value to their collections. The attractiveness of assets is practically tightly related to their value obeying the offer and demand law. New digital visualization technologies are found to give more excitements, especially to the younger generation as it is proven by multiple studies. Nowadays, museums around the world are currently trying to promote their collections through new multimedia and digital technologies such as 3D modeling, Virtual Reality (VR), Augmented Reality (AR), serious games, etc. However, the difficulty and the resources required to implement such technologies present a real challenge. Through this poster, we propose a 3D acquisition and visualization framework aiming mostly at increasing the value of cultural collections. This framework preserves cost-effectiveness and time constraints while still introducing new ways of visualization and interaction with high-quality 3D models of cultural objects. Our framework leverages a new acquisition setup to simplify the visual capturing process by using consumer-level hardware. The acquired images are enhanced using frame interpolation and super-resolution. A photogrammetry tool is then used to generate the asset 3D model. This model is displayed in a screen attached to the leap motion controller, which allows hand interaction without having to deal with sophisticated controllers or headgear allowing almost natural interaction.
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Jia, Lichao, Lili Yang, Huijing Yuan, Yongxia Jia, Yiyang Wang, and Yang Feng. "A Hybrid Approach for 3D Full-Field Measurement on a Closed Slinger Combustor by Hydraulic Simulations." In ASME Turbo Expo 2017: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/gt2017-63773.

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This hybrid approach proposed in the present study is a mixture algorithm of the 3D PTV and Tomo-PIV based on a two-camera system, which is able to measure the flow field in a closed system with high refractive without in situ calibration. Knowing the calibration data in the air and refractive indices of different optical media, a simplified multimedia photogrammetry model is established based on the least square method. A new particle matching algorithm using the concept of match probability between the twin image frames has been developed to reconstruct the physical position of the particles. In order to overcome the disadvantage of low particle density, time-resolved PIV is utilized at a sampling rate being 2000 Hz to acquire the instantaneous particle images. Then, the spectrum superposition of the cross-correlation distribution is applied to increase the signal-to-noise ratio in the velocity prediction. The technique proposed here can be used to overcome the difficulty in conventional calibration method for closed measurement objects. Both the computer simulation and some experiments imaging a calibration target reference field are conducted to show the accuracies of the calibration and reconstruction process. The capability of the technique in real experimental conditions is assessed with the measurement of the flow structure in a closed slinger combustor by hydraulic simulations.
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Salonia, P., S. Scolastico, A. Marcolongo, and T. Leti Messina. "Survey and 3D Reconstruction of the St. Orso Capitals in Aosta, through Three-Focal Photogrammetry." In 2009 15th International Conference on Virtual Systems and Multimedia (VSMM). IEEE, 2009. http://dx.doi.org/10.1109/vsmm.2009.11.

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