D3MOBILE Metrology World League: Training Secondary Students on Smartphone-Based Photogrammetry (original) (raw)
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D3mobile Metrology World League: Trainning Secondary Students on Smartphone-based Photogrammetry
The International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
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.
IEEE Geoscience and Remote Sensing Magazine, 2019
The D3MOBILE Metrology World League was established in 2013 with the aim of encouraging curiosity and interest in science, and particularly geoscience, in the secondary students of grades ISCED 1 and 2. Presented as an international championship, D3MOBILE introduces students to the discipline of photogrammetry through the e-learning methodology concept. The use of well-known technologies by the pupils, such as their own mobile devices (smartphones or tablets), allows us to develop educational procedures that are attractive and challenging for them. All the work that we propose for the participants is presented in a scientific, technical, and professional language but in a more interactive format than traditional textbooks or theoretical classes. The proposed challenges provide students with the opportunity to establish their own learning objectives, work as a team and take responsibility for their work. This paper addresses the experience, from an educational perspective, carried out by our research group CIGEO (Civil Engineering and Geomatics) during the organization of the first five editions of this international "concept submission competition". During this period, we tried to create and improve a project-based learning (PBL) methodology that can be adapted to e-learning and daily classwork at the high school level, which can be easily implemented regardless of the number of participants and can be implemented anywhere in the world. The obtained results demonstrate the potential of alternative teaching methods combined with new technologies to engage students in science learning and improve the perception of the geosciences as a job opportunity.
Measurement, 2021
The high level of automation, user-friendliness and cost-effectiveness of photogrammetry have contributed significantly to its popularisation among amateur users in recent years. Paradoxically, this situation poses challenges when relying on the accuracy of the derived 3-D products requiring control procedures to be implemented. In this context, we present a case study of the D3Mobile project: a fully online competition for participants worldwide funded by the International Society of Photogrammetry and Remote Sensing (ISPRS). The aim is for participants to obtain reality-based 3-D models using their own mobile phones and to critically examine the metric accuracy that hides behind the beguiling realism of photogrammetry. The relative precision of the former participants’ models reached values around 1:2,000, proportionally to the object size. These results provide an idea of the current level of development of photogrammetry and the potential it offers for any kind of user after proper capacity building and training.
Education and Training Resources on Digital Photogrammetry
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2018
Current close-range photogrammetry makes it possible to obtain 3-D models from imagery acquired with off-the-shelf digital cameras or other low-cost devices and processed with affordable software or apps in an almost automatic way. For this reason, a wider and wider public (often without a specific training, as archaeologists, architects, landscape planners, digital artists) is using these tools and their outcomes in many fields. However, the drawback of its ease of use is that photogrammetry is often used without any critical awareness of the metric quality of the results. Therefore, it is necessary to bridge the growing gap between the spread of photogrammetric techniques and their use through appropriate educational processes. The paper presents and explain the results of the project "Education and training resources on digital photogrammetry", financed in 2018 by ISPRS as part of the "Educational and Capacity Building Initiative" programme. The project, after evaluating the current teaching methodologies and techniques, is producing and sharing original teaching materials (like videos and datasets) on digital photogrammetry. The aim is to transform the traditional transmissive didactic model in a newer one in which the students have an active role and improve their proficiencies solving actual case studies in practice. This induces students to rethink and better understand all the steps of the photogrammetric project design, acquisition and processing but above all to acquire greater skills to critically evaluate the acquired data and results.
The International Archives of Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020
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.
E-Foto: an educational photogrammetric workstation
2018
(UERJ), in Brazil, developing and using the E-Foto software, one of the main achievements of the E-Foto project that aims to built-up a software tool for teaching digital photogrammetry and software development, to both graduate and undergraduate students, in the fields of Cartographic and Computer Engineering. E-Foto main objective is to diminish the gap that exists nowadays between the teaching of Photogrammetry and Remote Sensing in universities and Research Institutions of developing countries and the high-tech expensive systems that are used under the production environment.
Smartphones for Teaching and Learning With Engineering Students
Analysis of geological structures provides important information on the thicknesses, declivities, and volumes of rock removed, for example. In this paper, an alternative method of calculating approximate thicknesses and volumes of geological structures is presented through the use of smartphones and satellite technology. The method consists in taking photographs with digital wireless devices of the wall of the geological structure to study from a known position and distance. Through a program of analysis of images, photographs were dimensionally calibrated and digitally processed to get better detail. Moreover, via the applications of smartphones (Global Positioning System (GPS)), the work areas were located at Google™ Earth to determine their surface area, which was calculated with the transfer of images to AutoCAD® software. The determination of the thickness and volume of rock and material extracted with the methodology proposed here, show simple forms of work and quite accurate, which would otherwise be extremely complex for determination.
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
collaborated for a didactical joint initiative involving students from the Photogrammetry for Architecture course. The main goal was to develop a new teaching approach for architectural education exploiting photogrammetry as a digital tool for joining the Architectural Heritage (AH) documentation with the architecture analysis and design interpretation. Beginning from the new technological advances (semi-automatic workflows and smartphone cameras use), a 'learning-by-doing' didactical method and situated real work problems, a whole systematic process, based on the concept of a digital copy of an architectural artifact as mean to collect and to aggregate knowledge, was developed and inferred to the student. Starting from the designed teaching path, in which the perspectives of the historian, the surveyor, and the designer are blended to get a holistic vision of the architecture, 29 fireplaces by Andrea Palladio were chosen as emblematic case studies. These microarchitectures let students understand the complexities of historic objects and of their digitalization to produce 3D models as outcomes of an acquisition pipeline useful to train them for a future professional career.
Designing of course material for e-Learning in photogrammetry
Distance learning via the Internet (e-learning) requires good course material and a high degree of interactivity. On the basis of an e-learning course of the European Organisation for Spatial Data Research (EuroSDR, formerly OEEPE) about a photogrammetric research topic various tools for producing the user interface, the knowledge pages, multiple-choice quizzes, and interactive learning programs are described. The applied tools for the course "Automatic Orientation of Aerial Images on Databases" of the OEEPE/EUROSDR educational service 2002 and 2004 include standard software packages like "FrontPage", "QuizMaker", and "Flash MX" as well as programming tools like "Java", "ActionScript", "php-script", and "MathLab". The derived course material is either embedded into the Computer Conference System ("FirstClass"), which has to be installed on the client computer or is used within the browser "...