scholarly journals CLOSE-RANGE MINI-UAVS PHOTOGRAMMETRY FOR ARCHITECTURE SURVEY

2018 ◽  
Vol XLII-2 ◽  
pp. 217-224 ◽  
Author(s):  
L. Carnevali ◽  
E. Ippoliti ◽  
F. Lanfranchi ◽  
S. Menconero ◽  
M. Russo ◽  
...  
Keyword(s):  
Urban Areas ◽  
Low Cost ◽  
Point Of View ◽  
Future Application ◽  
Urban Context ◽  
Historical Building ◽  
Close Range Photogrammetry ◽  
Ground Point ◽  
Close Range ◽  
Architecture Analysis

The survey of historical façades contains several bottlenecks, mainly related to the geometrical structure, the decorative framework, the presence of natural or artificial obstacles, the environment limitations. Urban context presents additional restrictions, binding by ground acquisition activity and leading to building data loss. The integration of TLS and close-range photogrammetry allows to go over such stuff, not overcoming the shadows effect due to the ground point of view. In the last year the massive use of UAVs in survey activity has permitted to enlarge survey capabilities, reaching a deeper knowledge in the architecture analysis. In the meanwhile, several behaviour rules have been introduced in different countries, regulating the UAVs use in different field, strongly restricting their application in urban areas. Recently very small and light platforms have been presented, which can partially overcome these rules restrictions, opening to very interesting future scenarios. This article presents the application of one of these very small RPAS (less than 300 g), equipped with a low-cost camera, in a close range photogrammetric survey of an historical building façade in Bologna (Italy). The suggested analysis tries to point out the system accuracy and details acquisition capacity. The final aim of the paper is to validate the application of this new platform in an architectonic survey pipeline, widening the future application of close-range photogrammetry in the architecture acquisition process.

scholarly journals New Low-Cost Automated Processing of Digital Photos for Documentation and Visualisation of the Cultural Heritage

2011 ◽  
Vol 6 ◽  
pp. 249-258
Author(s):  
Karel Pavelka ◽  
Jan Řezníček
Keyword(s):  
Low Cost ◽  
Point Of View ◽  
Image Correlation ◽  
Close Range Photogrammetry ◽  
Special Software ◽  
Historical Objects ◽  
Automated Processing ◽  
Close Range ◽  
3D Scanners ◽  
Automated Technique

The 3D scanning is nowadays a commonly used and fast technique. A variety of type’s 3D scanners is available, with different precision and aim of using. From normal user´s point of view, all the instruments are very expensive and need special software for processing the measured data. Also transportation of 3D scanners – poses a problem, because duty or special taxes for transport out of the EU have to be paid and there is a risk of damage to dismantling of these very expensive instruments and calibration will be needed. For this reason, a simple and automated technique using close range photogrammetry documentation is very important. This paper describes our experience with the software solution for automatic image correlation techniques and their utilization in close range photogrammetry and historical objects documentation. Non-photogrammetrical approach, which often gives very good outputs, is described the last part of this contribution. An image correlation proceeds well only on appropriate parts of documented objects and depends on the number of images, their overlapping and configuration, radiometrical quality of photos, and surface texture.

scholarly journals Photogrammetry-based Texture Analysis of a Volcaniclastic Outcrop-peel: Low-cost Alternative to TLS and Automation Potentialities using Haar Wavelet and Spatial-Analysis Algorithms

2017 ◽  
Vol 31 (1) ◽  
pp. 16-27 ◽  
Author(s):  
Christopher Gomez ◽  
Kyoko Kataoka ◽  
Aditya Saputra ◽  
Patrick Wassmer ◽  
Atsushi Urabe ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Wavelet Decomposition ◽  
Low Cost ◽  
Decomposition Analysis ◽  
Haar Wavelet ◽  
Present Contribution ◽  
Close Range Photogrammetry ◽  
Original Goal ◽  
Close Range ◽  
Made In

Numerous progress has been made in the field of applied photogrammetry in the last decade, including the usage of close-range photogrammetry as a mean of conservation and record of outcrops. In the present contribution, we use the SfM-MVS method combined with a wavelet decomposition analysis of the surface, in order to relate it to morphological and surface roughness data. The results demonstrated that wavelet decomposition and RMS could provide a rapid insight on the location of coarser materials and individual outliers, while arithmetic surface roughness were more useful to detect units or layers that are similar on the outcrop. The method also emphasizes the fact that the automation of the process does not allows clear distinction between any artefact crack or surface change and that human supervision is still essential despite the original goal of automating the outcrop surface analysis.

scholarly journals Cultural Heritage Recording Utilising Low-Cost Closerange Photogrammetry

2011 ◽  
Vol 6 ◽  
pp. 185-192
Author(s):  
Melanie Kirchhöfer ◽  
Jim Chandler ◽  
Rene Wackrow
Keyword(s):  
Cultural Heritage ◽  
Low Cost ◽  
Cost Effective ◽  
Recording System ◽  
Exterior Orientation ◽  
Close Range Photogrammetry ◽  
Lay People ◽  
Close Range ◽  
English Heritage ◽  
Heritage Recording

Cultural heritage is under a constant threat of damage or even destruction and comprehensive and accurate recording is necessary to attenuate the risk of losing heritage or serve as basis for reconstruction. Cost effective and easy to use methods are required to record cultural heritage, particularly during a world recession, and close-range photogrammetry has proven potential in this area. Off-the-shelf digital cameras can be used to rapidly acquire data at low cost, allowing non-experts to become involved. Exterior orientation of the camera during exposure ideally needs to be established for every image, traditionally requiring known coordinated target points. Establishing these points is time consuming and costly and using targets can be often undesirable on sensitive sites. MEMS-based sensors can assist in overcoming this problem by providing small-size and low-cost means to directly determine exterior orientation for close-range photogrammetry. This paper describes development of an image-based recording system, comprising an off-the-shelf digital SLR camera, a MEMS-based 3D orientation sensor and a GPS antenna. All system components were assembled in a compact and rigid frame that allows calibration of rotational and positional offsets between the components. The project involves collaboration between English Heritage and Loughborough University and the intention is to assess the system’s achievable accuracy and practicability in a heritage recording environment. Tests were conducted at Loughborough University and a case study at St. Catherine’s Oratory on the Isle of Wight, UK. These demonstrate that the data recorded by the system can indeed meet the accuracy requirements for heritage recording at medium accuracy (1-4cm), with either a single or even no control points. As the recording system has been configured with a focus on low-cost and easy-to-use components, it is believed to be suitable for heritage recording by non-specialists. This offers the opportunity for lay people to become more involved in their local heritage, an important aspiration identified by English Heritage. Recently, mobile phones (smartphones) with integrated camera and MEMS-based orientation and positioning sensors have become available. When orientation and position during camera exposure is extracted, these phones establish off-the-shelf systems that can facilitate image-based recording with direct exterior orientation determination. Due to their small size and low-cost they have potential to further enhance the involvement of lay-people in heritage recording. The accuracy currently achievable will be presented also.

Multistack Close Range Photogrammetry for Low Cost Submillimeter Metrology

2013 ◽  
Vol 13 (4) ◽  
Author(s):  
L. M. Galantucci ◽  
F. Lavecchia ◽  
G. Percoco
Keyword(s):  
Surface Topography ◽  
Research Effort ◽  
Low Cost ◽  
Three Dimensional ◽  
Robotic Systems ◽  
Image Composition ◽  
Close Range Photogrammetry ◽  
Considerable Research ◽  
Close Range ◽  
Dimensional Surface

Considerable research effort has been focused on evaluating the accuracy of meso- and macroscale digital close range photogrammetry. However, evaluations of accuracy and applications in the submillimeter scale are rare. In this paper the authors propose the development of a three-dimensional (3D) photogrammetric scanner, based on macrolens cameras, able to reconstruct the three-dimensional surface topography of objects with submillimeter features. The system exploits multifocal image composition and has been designed for installation on all types of Numerical Controlled or Robotic systems. The approach is exploitable for digitizing submillimeter features at mesoscale as well as macroscale objects.

Potential of low cost close-range photogrammetry system in soil microtopography quantification

2009 ◽  
Vol 23 (10) ◽  
pp. 1408-1417 ◽  
Author(s):  
Mohamed A. M. Abd Elbasit ◽  
Hisao Anyoji ◽  
Hiroshi Yasuda ◽  
Shunichi Yamamoto
Keyword(s):  
Low Cost ◽  
Close Range Photogrammetry ◽  
Close Range

scholarly journals UAV PHOTOGRAMMETRY WITH OBLIQUE IMAGES: FIRST ANALYSIS ON DATA ACQUISITION AND PROCESSING

2016 ◽  
Vol XLI-B1 ◽  
pp. 835-842 ◽  
Author(s):  
I. Aicardi ◽  
F. Chiabrando ◽  
N. Grasso ◽  
A. M. Lingua ◽  
F. Noardo ◽  
...  
Keyword(s):  
Low Cost ◽  
Complete Information ◽  
Point Of View ◽  
Historical Building ◽  
Critical Issues ◽  
Commercial Off The Shelf ◽  
Aerial Platforms ◽  
High Level ◽  
Architectural Survey ◽  
Oblique Images

In recent years, many studies revealed the advantages of using airborne oblique images for obtaining improved 3D city models (e.g. including façades and building footprints). Expensive airborne cameras, installed on traditional aerial platforms, usually acquired the data. The purpose of this paper is to evaluate the possibility of acquire and use oblique images for the 3D reconstruction of a historical building, obtained by UAV (Unmanned Aerial Vehicle) and traditional COTS (Commercial Off-the-Shelf) digital cameras (more compact and lighter than generally used devices), for the realization of high-level-of-detail architectural survey. The critical issues of the acquisitions from a common UAV (flight planning strategies, ground control points, check points distribution and measurement, etc.) are described. Another important considered aspect was the evaluation of the possibility to use such systems as low cost methods for obtaining complete information from an aerial point of view in case of emergency problems or, as in the present paper, in the cultural heritage application field. The data processing was realized using SfM-based approach for point cloud generation: different dense image-matching algorithms implemented in some commercial and open source software were tested. The achieved results are analysed and the discrepancies from some reference LiDAR data are computed for a final evaluation. The system was tested on the S. Maria Chapel, a part of the Novalesa Abbey (Italy).

scholarly journals Integration the Low Cost Camera Images with the Google Earth Dataset to Create a 3D Model

2020 ◽  
Vol 6 (3) ◽  
pp. 446-458
Author(s):  
Marwa Mohammed Bori ◽  
Zahraa Ezzulddin Hussein
Keyword(s):  
Laser Scanning ◽  
3D Model ◽  
Low Cost ◽  
Digital Camera ◽  
Smart Phone ◽  
Google Earth ◽  
Close Range Photogrammetry ◽  
Statistical Analysis Method ◽  
Close Range ◽  
The Cost

As known Close range photogrammetry represents one of the most techniques to create precise 3D model. Metric camera, digital camera, and Laser scanning can be exploited for the photogrammetry with variety level of cost that may be high. In this study, the cost level is taken in to consideration to achieve balance between the cost and the obtained accuracy. This study aims to detect potential of low cost tools for creating 3D model in terms of obtained accuracy and details and comparing it with corresponding studies. Smart phone camera is the most available for everyone; this gave the motivation for use in this study. In addition, Google Earth was used to integrate the 3D model produced from all sides including the roof.  Then, two different types of the mobile camera were used in addition to the DSLR camera (Digital Single Lens Reflex) for comparison and analysis purposes. Thus, this research gave flexibility in work and low cost resulting from replacement the metric camera with the smart camera and the unmanned aerial vehicle (UAV) with Google Earth data. Mechanism of the work can be summarized in four steps. Firstly, photogrammetry planning to determine suitable baselines from object and location of targets that measured using GPS and Total station devices. Secondly, collect images using close range photogrammetry technique. Thirdly, processing step to create the 3D model and integrated with Google Earth images using the Agi Photoscan software. Finally, Comparative and evaluation stage to derive the accuracy and quality of the model obtained from this study using statistical analysis method. Regarding this Study, University of Baghdad, central library was selected as the case study. The results of this paper show that the low cost 3D model resulted from integrating  phone and Google Earth images gave suitable result with mean accuracy level reached to about less than 5 meters compared with DSLR camera result, this may be used for several applications such as  culture heritage and architecture documentation.

scholarly journals The void and the memory. Ludovico Quaroni’s competition project for the Tobacco Manufacturing and the Navile Park in Bologna (1984). An urban figurative regeneration

2017 ◽  
Vol 2 (1) ◽  
pp. 81
Author(s):  
Matteo Sintini
Keyword(s):  
World War Ii ◽  
20Th Century ◽  
Urban Areas ◽  
Point Of View ◽  
Urban Context ◽  
Italian Experience ◽  
Historical Memories ◽  
In The Beginning ◽  
The City ◽  
New System

<p>The Ludovico Quaroni's competition winner project for the urban park of the Tobacco Manufacturing and the Navile dockyard, although unrealised, still represents a sort of conclusive point of the search path (he died in 1987) of one of the most prominent characters of the Italian architectural scene – and not only - of the 20th century. Furthermore, the high number of contenders to the competition’s first stage (139) made the contest itself an extraordinary occasion of rethinking an important part of the city of Bologna, a somewhat hybrid part located on the verge of town historic centre and its first expansion and offered the chance of challenge for the mostly Italian architects. The Quaroni’s group was composed by many others architects including important authors of the reconstruction projects of Bologna in the years following World War II; their proposal aimed at bringing order in a non-connected urban context filled with many fragments of historical memories of the site. The process of spaces redefinition, as in the beginning projects of the architect’s career, is conducted with the tools of the “design” (as used by Manfredo Tafuri, 1964), as an instrument of territorial and urban areas re-composition, undertook through the conservation of trails, overlapped by a new system of episodes, keeping the idea of fragments, responding to the competition requirements. In fact, the project balances the new parts in strict relation with the pre-existing elements of the historic town centre, considering the tangible and material dimensions of the city. Such a new system is governed by a clear scheme of structured elements based on the project of void, provided with a clear formal image, whose final outcome is a figurative regeneration. In this idea and formal organism Quaroni developing many of his design principles, gives a personal interpretation to the contemporary issue of regeneration empowered by those reflections that had just entered in the much wider debate in the mid-eighties, about conservation and sustainability of historic centres and the natural environment. Notably, this issue is dealt with in a cultural environment such as the one of Bologna, a city that gave much to the debate on conservation of old towns (see the Cervellati plan); a discussion founding the Italian experience of the 20th century and particularly of its second half. From this point of view, the contribution of architects from Bologna at Quaroni’s project has therefore probably accounted for the special sensibility shown by the project on those matters. After giving up on Quaroni’s plan Aldo Rossi was chosen by the Municipality to develop the project; his ideas confirm, although with different outcomes, an approach based on the value of the conservation of memory and the use of clear forms as means of urban regeneration.</p>

scholarly journals Design & Control of Low Cost Solar Tree for Optimizing a PV System

2019 ◽  
Vol 8 (2) ◽  
pp. 5622-5626 ◽  
Keyword(s):  
Urban Areas ◽  
Low Cost ◽  
Point Of View ◽  
Solar Panels ◽  
Pv System ◽  
The Road ◽  
Energy Demands ◽  
On The Road ◽  
Solar Resource ◽  
And Control

This concept shows the design and control of a solar tree PV system for charging cell phones, supplying electricity for street lighting on open urban areas and charging of electric bike on the road side when the charge is decaying. Based on the above applications, a 7 feet height-tree was built. It has three section of branches, each branches contains 5 sub stem over which leaves made of acrylic with solar panels on the top (1.5 feet × 1feet) mounted. The energy storage capacity is 30 Amp. It has 2 USB ports to connect mobile devices and two 12V-300 W electrical outlets to connect those devices to the electricity. The solar tree was designed according to the environmental conditions of Gunupur, Odisha and for optimizing the output power a flow chart with programming developed. The result was compared with the C language programme. At the last, the PV system's availability to satisfy the energetic requirements was verified. Due to population growth and energy demands, the solar energy is the 2nd best source of non conventional energy which is cause pollution free in nature. By using the concept of the series and parallel connection of panel with the help of sub branch of the main stem the efficiency of the system can be improved. As compared to normal PV system in area point of view the Solar tree becomes more efficient. There is no systematic stimulation for usage of solar panels, purely relying on individual cases of installation on different types of objects. Solar tree may be very much helpful for creating awareness about solar resource. This concept elaborates the possibility of building a solar tree in GIET campus odisha, India, covering technical, social and economic aspects. Benefits and potential drawbacks are elaborated, while special emphasis is given to the specifics of its utilization due to the geographical position of odisha and corresponding number of sunny hours/days per year.

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