Photogrammetry

El procesamiento de datos fotogramétricos mediante VANT para resaltar rasgos arqueológicos. Dos aplicaciones en la cuenca de México. (En prensa: Sistemas de información geográfica para arqueólogos: Repensando el espacio en contextos arqueológicos mesoamericanos. Armando Trijullo (ed.) El colegio Mexiquense.)-NO CITAR SIN EL PERMISO DE LOS AUTORES-Resumen: El uso de vehículos aéreos no tripulados (VANT´s) es cada vez más frecuente en arqueología con el fin de obtener ortofotos de alta resolución o modelos digitales de elevación resultado del procesamiento fotogramétrico. No obstante, los resultados pueden procesarse mediante diferentes algoritmos que han demostrado su utilidad en el procesamiento de modelos LiDAR (Ligth Detection and Range), permitiendo eliminar la vegetación y destacar rasgos de probable origen antrópico. Si bien los datos obtenidos por los sensores aerotransportados mediante VANT´s requieren de una capacidad de cómputo respetable y del uso de softwares especializados, se obtienen resultados importantes en un tiempo relativamente corto y a un costo mucho menor a si se utilizaran datos LiDAR tradicionales. En esta aportación presentamos los resultados obtenidos en el Cerro Yohualtécatl (Cerro Guerrero), en la Sierra de Guadalupe y en las chinampas arqueológicas de San Gregorio Atlapulco, Xochimilco, en donde empleamos análisis del tipo Sky View Factor, Red Relief Map, entre otros, los cuales fueron muy útiles para localizar y definir estructuras de tipo antrópico. Introducción: Vehículos aéreos no tripulados (VANT´s) y análisis geográficos, una necesidad en arqueología. La arqueología a lo largo de su historia ha adoptado diferentes metodologías para el registro y la investigación del patrimonio, dentro de éstas, el análisis mediante fotografía aérea ha adquirido un papel fundamental (Forte y Campana, 2016; Musson et al., 2013). En este

Material didactic pentru workshopul "Capturi 3D pentru patrimoniu"

https://ateliermacpopescu.wixsite.com/uauim/events/capturi-3d-pentru-patrimoniu

Înregistrarea prezentării:
https://m.youtube.com/watch?v=qDMNcKmE3Uc&feature=youtu.be

The digital storage and communication of significant geological data became increasingly more objective and accessible through the development of new technologies or the implementation of already well-known techniques as photogrammetry. Digital acquisition of geometries (both structural and depositional) of significant geological outcrops is deemed necessary, especially if the site concerned is liable to be damaged or hopelessly involved in natural processes of geological and geomorphological evolution. In this paper, we tested the performances of two different open-source software (i.e. VisualSFM and ARC3D) on a small-scale but paradigmatic outcrop in the Umbria-Marche Apennines (Italy). The test showed that ARC3D provides an high-resolution model, employing a relatively short time and requiring a not expensive hardware support for processing hundreds of photos. In the text, 3D models of the selected outcrop are reported and discussed emphasizing the potential of the method to high...

SUMMARY Close Range Photogrammetry is an alternative-next to classical topographical measurementsto obtain metric documentation about important archaeological objects or monuments. As a partial collapse of the remnants of the walls around the acropolis on the ...

Commission VI, WG VI/4 ABSTRACT: The Villa Reale in Monza (ITALY) was founded as a symbol of the prestige and the greatness of the Asburgic family. The complex was built in an area not far from the Real Palace in Milan, the main imperial estate, in what once was a hunting haunt affording beautiful views near Monza, a small yet important trading centre. With its Gardens and the Park (later enlarged on Canonica's design), the great majestic Villa dominated the area, thanks also to the rational constructive rigour and the clear functionality with which it was built and the noble and sober elegance. Our work comes after the activities that we conducted in the last three years to prepare the material for the "International Design Competition for the Refurbishment and Enhancement of the Real Villa in Monza and its Gardens". In fact in 2003 we began with the Lombardy Region a set of survey in the Real Villa of Monza to know in detail the condition and the state of fact of the...

The increasing demand for up-to-date 3-D geographic information systems (GIS) in planning, transportation, and utility management applications poses significant challenges to the Geomatics community. Of all the challenges in acquiring, building, maintaining, and using GIS, none is more central than that of dala acquisition. Obtaining the required spatial and attribute data by conventional methods such as aerial photogrammetry and terrestrial surveying is expensive, slow, or inaccurate. These methods are, therefore, not well suited for rapid updating. Fortunately, however, the development of land-based mobile mapping systems (MMS) has opened a new avenue to meet these challenges. Land-based MMS are capable of providing fast, efficient, cost-effective and complete data acquisition. As such, they are an innovative technology for creating and updating 3-D GIS databases both quickly and inexpensively. Basically, MMS are based on integrated navigation systems, mainly the integration of GP...

Acoustic signals that reliably indicate body size, which usually determines competitive ability, are of particular interest for understanding how animals assess rivals and choose mates. Whereas body size tends to be negatively associated with formant dispersion in animal vocalizations, non-vocal signals have received little attention. Among the most emblematic sounds in the animal kingdom is the chest beat of gorillas, a non-vocal signal that is thought to be important in intra and inter-sexual competition, yet it is unclear whether it reliably indicates body size. We examined the relationship among body size (back breadth), peak frequency, and three temporal characteristics of the chest beat: duration, number of beats and beat rate from sound recordings of wild adult male mountain gorillas. Using linear mixed models, we found that larger males had significantly lower peak frequencies than smaller ones, but we found no consistent relationship between body size and the temporal characteristics measured. Taken together with earlier findings of positive correlations among male body size, dominance rank and reproductive success, we conclude that the gorilla chest beat is an honest signal of competitive ability. These results emphasize the potential of non-vocal signals to convey important information in mammal communication.

Obtaining high precision spatial documentation of archaeological sites in cramped places can be challenging. This poster outlines an ad hoc procedure for spatially documenting artifacts and structural elements of a 13th century burial in Northern Norway by using photogrammetry.

The common challenge of all aerospace advancements is greening the air transport. This led the recent research programs towards the study of 'metamorphic' wing structures, capable of adapting their geometry to the different conditions of flight. The development of morphing structures allows the reduction of drag and the increase of range, together with the growth of load control effectiveness. In this context, the European research project SARISTU addressed the physical integration of smart and morphing structural concepts, by implementing them on a true scale outer wing belonging to a CS-25 category aircraft finally tested in a large Wind Tunnel. In the framework of SARISTU project, the design of an Adaptive Trailing Edge Device was developed. The morphing skin concept consisted of a segmented skin, with aluminum and silicone foam strips covered by a protective silicone top-layer. A two-bay demonstrator was tested inside the Wind Tunnel at the Department of Industrial Engineering of the University of Naples 'Federico II'; experimental analyses were performed in order to verify whether the silicone parts could show out of plane bumps induced by the aerodynamic loads occurring during the Wind Tunnel test campaign. A photogrammetric optic approach was adopted, in order to reach the aforementioned targets in a non-invasive way; such methodology was selected due the high resolution assured at a very low implementation costs. Obtained results allowed to confirm the demonstrator well done design and opened the doors to the next experimental test campaign performed in TsAGI Russian Wind Tunnel, on the outer wing equipped with a five-bay demonstrator of the Adaptive Trailing Edge Device. © 2017 IEEE.

Une comparaison est effectuee entre les facons employees en photogrammetrie et en vision par ordinateur pour traiter les problemes lies a l'acquisition de la 3D a partir d'images stereoscopiques. Le formalisme adopte, assez different, est presente, et quelques perspectives d'evolution en sont deduites.

The advent of the smartphones brought with them higher processing capabilities and improved camera specifications which boosted the applications of mobile-based imagery in a range of domains. One of them is the 3-D reconstruction of objects by means of photogrammetry, which now enjoys great popularity. This fact brings potential opportunities to develop educational procedures in high schools using smartphone-based 3-D scanning techniques. On this basis, we designed a Project Based e-Learning (PBeL) initiative to introduce secondary students to the disciplines of photogrammetry through the use of their mobile phones in an attractive and challenging way for them. The paper describes the motivation behind the project "D3MOBILE Metrology World League", supported by ISPRS as part of the "Educational and Capacity Building Initiative 2020" programme. With this Science, Technology, Engineering and Mathematics (STEM) initiative, we implement a methodology with the format of an international competition, that can be adapted to daily classwork at the high school level anywhere in the world. Therefore, the championship is essentially structured around a collection of well-thought-out e-learning materials (text guidelines, video tutorials, proposed exercises, etc.), providing a more flexible access to content and instruction at any time and from any place. The methodology allows students to gain spatial skills and to practice other transversal abilities, learn the basics of photogrammetric techniques and workflows, gain experience in the 3-D modelling of simple objects and practice a range of techniques related to the science of measurement.

We present a fast algorithm to estimate the penetration depth between convex polytopes in 3D. The algorithm incrementally seeks a "locally optimal solution" by walking on the surface of the Minkowski sums. The surface of the Minkowski sums is computed implicitly by constructing a local dual mapping on the Gauss map. We also present three heuristic techniques that are used to estimate the initial features used by the walking algorithm. We have implemented the algorithm and compared its performance with earlier approaches. In our experiments, the algorithm is able to estimate the penetration depth in about a milli-second on an 1 GHz Pentium PC. Moreover, its performance is almost independent of model complexity in environments with high coherence between successive instances.

Photogrammetry has revolutionised in the last decade, with the advent of computer vision techniques such as Structure from Motion (Westoby et al., 2012).These techniques now allow us to capture outcrops, in 3D, at high resolution simply with a digital camera and inexpensive software (e.g. AGISOFT PHOTOSCAN PRO).The objective of this study was to test the variables that make high quality photogrammetric models and develop a workflow for reliable geological mapping of legacy open pits, for the exploration geologist and mine geologist. The case study site is Lindsays Pit, Coolgardie, Western Australia.

Застосування фотограмметричних методів у керамології Подано досвід використання фотограмметрії в керамології (необхідні прилади, обладнання, програмне забезпечення, процес фіксації та його особливості для певних глиняних виробів, опрацювання вихідних результатів). Описано метрологічні дослідження 3D-моделей, розрахунки площі та об'єму, створення цілої форми виробу.

Imaging  technologies  are  transforming  the  study  and  presentation  of  artefacts.  The  contributors  to  this  volume  are  at  the  vanguard  of  applying  developing  technologies  to  cultural  heritage,  and  their  chapters  discuss  ways  in  which  various  techniques  are  being  used  for  research,  digital  cataloguing,  and  public  engagement.  Eight  chapters  highlight  diverse  methods  in  imaging  and  presentation  (e.g.  photogrammetry,  multispectral  and  hyperspectral  imaging,  structure-from-light,  digital  microscopy,  3D  printing,  and  virtual  and  augmented  reality)  applied  to  objects  of  differing  forms,  size,  media  and  cultural  origin,  including  standing  stones  in  pre-Columbian  Nicaragua,  Egyptian  and  Roman  sculpture,  Mesopotamian  cylinder  seals,  and  rock  crystal  vessels  made  in  the  early  medieval  Islamic  world.  Aimed  at  contributing  to  knowledge-transfer  between  sciences,  humanities,  and  cultural  heritage  professionals,  this  volume  offers  updated,  accessible  accounts  of  digital  imaging  of  objects  for  general  and  specialist  audiences.

The ultimate goal of pattern recognition systems in remote sensing is to achieve the best possible classification performance for recognition of different objects such as buildings, roads and trees. From a scientific perspective, the extraction of roads in complex environments is one of the challenging issues in photogrammetry and computer vision, since many tasks related to automatic scene interpretation are involved. Roads have homogeneous reflectivity in LIDAR intensity and the same height as bare surface in elevation. Proposed method in this paper is based on combining multiple classifiers (MCS) is one of the most important topics in pattern recognition to achieve higher accuracy. Majority Voting and Selective Naive Bays are two methods that used for fusion of classifiers.

We would like to invite you to join this exciting new project as a chapter contributor. Since this is a textbook, a great deal of this chapter entails a survey on the topic under the paradigm of cyber-physical systems, what can be done onboard and remotely, the distributed nature of the system and some exercises on futurology (anticipating trends can shed some light on upcoming designs). IET will bring great visibility to your work. You are welcome to suggest another topic/chapter title if you feel it would be more suitable. Each chapter should be around 20-25 pages each and can be submitted as a Word or Latex File. The IET will send you additional information (formatting, permission form, etc.) with the contributor's agreement once you have agreed to contribute to the book. Visit http:// www.theiet.org/resources/author-hub/books/index.cfm to get all information you need as a contributor to an IET research-level book. Each book is expected to have a total number of 500 printed pages (based on approximately 550 words per page with a 20% allowance for figures and tables). We have included a tentative schedule and list of topics below. If this is something you would consider, please send me the title of your chapter, a short description/abstract of the chapter content, and your full contact details. We will expect original content and new results for this book. You can, of course, reuse published material but the percentage of material reuse for the chapter should be less than 40%. The IET will run a piracy software on the full manuscript to control that you are including original material and will reject chapters who contain a large amount of already-published material so please do take this into consideration.

This paper traces the development of techniques of recording carvings on megalithic tombs and on open-air rock-art in Ireland from 1699 to the present day. Analysis shows that after the initial pioneering phase, recording methodologies tended to develop in accelerated bursts, interspersed with lulls in activity. In all, four phases of activity can be identified; in each there were a critical number of researchers who interacted with each other, driving forward advances in various forms of recording methods. Part 2 of the paper describes the application of new methods of digital recording, notably Structure from Motion photogrammetry. It shows how the resulting data have been used to create new ways of experiencing Irish prehistoric art in virtual environments, either as entire monuments in the landscape or within a “virtual museum”, using the open-source Blender 3D animation and game engine software.

Abstract. In most of Nigeria’s rural communities, land holdings are small and uneven; and this impacts significantly on their mechanisation potentials. This fragmented nature of the farmlands also inhibits the creation of an effective land market. This study utilised a digital orthomosaic generated from an Unmanned Aerial Vehicle (UAV) survey in evaluating the productivity levels of traditional and mechanised farmers in Okeho Community of Oyo State, South-Western Nigeria. The aerial survey was conducted with a DJI Phantom 4 Professional UAV covering 250 acres of traditional and mechanised farmlands to produce a very high resolution orthomosaic at 6 cm spatial resolution. Sixty-three respondents (61 traditional farmers and 2 mechanised farmers) were also interviewed using questionnaires. Their responses were keyed into a database with the Open Data Kit (ODK) data collector. The orthomosaic was classified into farmland units and a database of the farmers land holdings was created in A...