Photogrammetric Point Cloud Collection with Multi-camera Systems

Fritsch, Dieter; Abdelwahab, Mohammed; Cefalu, Alessandro; Wenzel, Konrad

doi:10.1007/978-3-642-34234-9_2

Cited by 11 publications

(5 citation statements)

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“…As well known and tested by scientific community (Kerstenand andLindstaedt, 2012, Hullo et al, 2009;Fritsch et al, 2011;Fritsch et al, 2012), the point cloud obtained by RPAS photogrammetry allowed to generate a 3D model of the roofs of the entire complex which was, however, defective of information on the external masonry ledge, since the images were only acquired with a nadiral point of view. Conversely, the point cloud acquired by laser scanner technique allowed to develop a 3D model very detailed on the facades but with a lack of information on the roofs and ledges.…”

Section: Different Sensors Clouds Fusion and New Modelsmentioning

confidence: 99%

Fusion of 3D models derived from TLS and image-based techniques for CH enhanced documentation

Bastonero

Donadio

Chiabrando

et al. 2014

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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ABSTRACT:Recognizing the various advantages offered by 3D new metric survey technologies in the Cultural Heritage documentation phase, this paper presents some tests of 3D model generation, using different methods, and their possible fusion. With the aim to define potentialities and problems deriving from integration or fusion of metric data acquired with different survey techniques, the elected test case is an outstanding Cultural Heritage item, presenting both widespread and specific complexities connected to the conservation of historical buildings. The site is the Staffarda Abbey, the most relevant evidence of medieval architecture in Piedmont. This application faced one of the most topical architectural issues consisting in the opportunity to study and analyze an object as a whole, from twice location of acquisition sensors, both the terrestrial and the aerial one. In particular, the work consists in the evaluation of chances deriving from a simple union or from the fusion of different 3D cloudmodels of the abbey, achieved by multi-sensor techniques. The aerial survey is based on a photogrammetric RPAS (Remotely piloted aircraft system) flight while the terrestrial acquisition have been fulfilled by laser scanning survey. Both techniques allowed to extract and process different point clouds and to generate consequent 3D continuous models which are characterized by different scale, that is to say different resolutions and diverse contents of details and precisions. Starting from these models, the proposed process, applied to a sample area of the building, aimed to test the generation of a unique 3Dmodel thorough a fusion of different sensor point clouds. Surely, the describing potential and the metric and thematic gains feasible by the final model exceeded those offered by the two detached models.

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Section: Different Sensors Clouds Fusion and New Modelsmentioning

confidence: 99%

Fusion of 3D models derived from TLS and image-based techniques for CH enhanced documentation

Bastonero

Donadio

Chiabrando

et al. 2014

ISPRS Ann. Photogramm. Remote Sens. Spatial Inf. Sci.

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“…filtering by early 2D appearance-based constraints, but mainly because of utilizing graphics processors and parallelizing the computation on multi-core computer architectures. [12] describes a method for accurate surface reconstruction where 2 billion 3D points were acquired efficiently with sub-mm accuracy using a compact hand-held camera rig consisting of a number of industrial cameras mounted on a frame in order to acquire images from multiple views at once. The images are processed with an automated software pipeline.…”

Section: Related Workmentioning

confidence: 99%

4D Reconstruction of Tangible Cultural Heritage Objects from Web-Retrieved Images

Kyriakaki

Doulamis

et al. 2014

International Journal of Heritage in the Digital Era

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The number of digital images that are available online today has reached unprecedented levels. Recent statistics showed that by the end of 2013 there were over 250 billion photographs stored in just one of the major social media sites, with a daily average upload of 300 million photos. These photos, apart from documenting personal lives, often relate to experiences in well-known places of cultural interest, throughout several periods of time. Thus from the viewpoint of Cultural Heritage professionals, they constitute valuable and freely available digital cultural content. Advances in the fields of Photogrammetry and Computer Vision have led to significant breakthroughs such as the Structure from Motion algorithm which creates 3D models of objects using their 2D photographs. The existence of powerful and affordable computational machinery enables the reconstruction not only of single structures such as artefacts, but also of entire cities. This paper presents an overview of our methodology for producing cost-effective 4D – i.e. in space and time – models of Cultural Heritage structures such as monuments and artefacts from 2D data (pictures, video) and semantic information, freely available ‘in the wild’, i.e. in Internet repositories and social media. State-of-the-art methods from Computer Vision, Photogrammetry, 3D Reconstruction and Semantic representation are incorporated in an innovative workflow with the main goal to enable historians, architects, archaeologists, urban planners and other cultural heritage professionals to reconstruct cost-effective views of historical structures out of the billions of free images floating around the web and subsequently interact with those reconstructions.

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“…The level of current technologies allows the collection of big data in a very short time and moving most of the surveying work to the office. It is possible mainly due to digital photogrammetry [1,2] and laser scanning [3,4]. Combining these methods is commonly used in modern systems called mobile mapping systems [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Optimizing Mobile Laser Scanning Accuracy for Urban Applications: A Comparison by Strategy of Different Measured Ground Points

Běloch,

Pavelka

2024

Applied Sciences

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Mobile mapping systems are part of modern data collection in geodesy. It is one of many surveying methods where field collection is performed in a short time. Among their advantages are cost savings and better visualisation than classic surveying methods. This article is focused on accuracy determinations in urban built-up areas of mobile laser scanning using the Riegl VMX-2HA system. These areas, where there is a combination of dense housing and trees, are an integral part of cities. Their diversity and complexity make surveying by other surveying methods time-consuming and complicated. In particular, the GNSS RTK method encounters problematic locations where sky obscuration by surrounding elements reduces measurement accuracy. Data collection was performed on a test base in the city of Pilsen, Czech Republic. The base includes 27 control points and more than 100 checkpoints. Two sets of coordinates were created for the points; the first set is calculated using tied net adjustment and the second one is determined by RTK GNSS measurements. Point cloud calculations were processed in RiPROCESS software from Riegl, using different configurations and qualities of the control points. Each point cloud was analysed including the determination of point cloud deviations. This article is also dedicated to the identification of problematic spots, where measurement can be degraded. The results presented in this paper show the influence of the quality and different spacing of the control points on the point cloud, its accuracy compared to the precise points, and the global and local deformation of the point cloud. This work can be used as a basis for replacing classical surveying methods with a more efficient mobile laser scanning method.

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Photogrammetric Point Cloud Collection with Multi-camera Systems

Cited by 11 publications

References 5 publications

Fusion of 3D models derived from TLS and image-based techniques for CH enhanced documentation

Fusion of 3D models derived from TLS and image-based techniques for CH enhanced documentation

4D Reconstruction of Tangible Cultural Heritage Objects from Web-Retrieved Images

Optimizing Mobile Laser Scanning Accuracy for Urban Applications: A Comparison by Strategy of Different Measured Ground Points

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