3D Acquisition

Duration

10h Th, 20h Pr, 0,5d FW

Number of credits

Lecturer

N...

Substitute(s)

Florent Poux

Language(s) of instruction

French language

Organisation and examination

Teaching in the first semester, review in January

Schedule

Schedule online

Units courses prerequisite and corequisite

Prerequisite or corequisite units are presented within each program

Learning unit contents

The "3D Acquisition" course will enable you to master the key principles related to the acquisition of spatial data. Your objective is to complete the course by carrying out the various missions requested, linked to a final project.

To help you realize this project, I provide you with 3 tools: - Theoretical courses, to prepare you and allow you to rely on a clear basis - Practical work, to directly apply theoretical learning - Supervised support based on the deliverables of the various missions.

Content of the teaching unit
Reality Capture
The principles Instruments and methods Sensors and acquisition vectors 3D applications

Laser scanning
Principle of Laser scanning The different Laser Scanners and mobile platforms Laser Scanning: errors Laser Scanning: In practice (Acquisition) Laser Scanning: Assembly (Registration) Laser Scanning: Processing of "point cloud" data
Dense photogrammetry "Structure from Motion (SfM)"
Introduction to 3D photo-reconstruction The "classic" photogrammetry Measurement platforms Principle of SfM Photogrammetry 3D photo-reconstruction: in practice Camera settings for shooting Land acquisition Multi-view reconstruction The "SfM" processes Dense matching Image interpretation 3D reconstruction, orthoimage and DSM
Data fusion and 3D assembly
Make floorplans from 3D data Extract data information from point clouds Introduction to 3D mesh processing Control and characterization of errors and precision of techniques Assembly, Georeferencing and 3D implementation Production of maps, plans and geo-referenced 3D reconstructions

These different points are addressed in a theoretical way, then put into practice directly according to a project established during the first theoretical session.

Learning outcomes of the learning unit

Become an expert in "Reality Capture", able to manage 3D survey projects from A to Z.

Prerequisite knowledge and skills

• Geodetic systems
• Geometry and trigonometry
• Least squares
• Epipolar Geometry
• Use of word processing softwares
• Use of spreadsheets and/or programming scripts
• Make a professional presentation
• Topography & Use of total stations + GNSS receivers
• Réalisation de présentation par diaporama

Planned learning activities and teaching methods

The training process is relatively simple but not necessarily intuitive if you are used to traditional training.
You will not take courses that lead to exams with quotations.  You will carry out missions that lead to reports, calculations and/or support to validate the acquisition of skills.
In other words, to do this training I ask you to acquire all the essential skills of a professional.
The projects are reconstructions of professional scenarios, simulations of the daily life of a professional, if you prefer. In the project, I give you a list of deliverables or tasks to be carried out in compliance with requirements. Then it's up to you. As in real life, these activities can take several weeks (or even months).
The idea of project-based pedagogy is to enable you to learn under conditions that are as realistic as possible. So the projects push you to:
Contextualize your practices Plan your work in the short/medium/long term Find the information you need to solve a problem Create quality deliverables that you can use during interviews Present your work publicly Improve yourself with resources and feedback
The logistical and scheduling organization can be variable, but a certain amount of theory will be provided before each mission is carried out. The missions will partly and/or fully be realized in pratical sessions

Mode of delivery (face to face, distance learning, hybrid learning)

It is a face-to-face teaching. The theoretical and practical sessions in controlled autonomy take place on the day scheduled in the course schedule.

Organisational adjustments related to the current health context

Depending on the health context, the lessons will be held according to the modalities linked to the colour code in force (see https://www.coronavirus.uliege.be/upload/docs/application/pdf/2020-09/covid19_2020-09-04.pdf for the period September-October).

• any absence for medical reasons must be justified by a medical certificate, sent to the secretariat of the department (Anna Poletto) and with a copy of the e-mail to fpoux@uliege.be up to 48 hours after a missed session, containing the medical certificate as an attachment.
• If the absences imply the non-fulfilment of missions >30% of the total number of missions necessary for the successful completion of the overall project, an additional examination will be carried out to validate the knowledge dispensed for medical reasons. This examination may include multiple-choice questions, reports to be submitted in various forms, as well as an oral presentation and a theoretical examination in the classroom.
• The course materials will always be available on the eCampus space, and certain video capsules could then be added to complement virtual teaching.

Recommended or required readings

Provided in class

Assessment methods and criteria

Below you will find information on the evaluation methods planned for in-person and remote exams as well as those planned for hybrid sessions. Depending on how the health crisis evolves, the chosen method will be communicated to you no later than one month before the start of the exam session.

Any session :

- In-person

oral exam

- Remote

oral exam AND written work

- If evaluation in "hybrid"

preferred remote


Additional information:

A permanent non-certifying self-assessment is ensured during the practical exercise sessions by strong interaction between students and teachers.

The certification evaluation is carried out on the basis of the different deliverables and supports.
6 families of criteria are studied:
Field/practicals activities Reports and deliverables Mission-specific techniques The different calculations and logical reasoning The graphical report The quality of the defense
The questions asked during the student's support are inspired by the imperfections of the different deliverables.
The evaluation criteria are: clarity, coherence, logic, rigour, precision, exhaustiveness, conciseness, relevance, transversality (within and between courses), quality of mathematical interpretations (e. g. mathematical significance of different coefficients in equations), physical (e. g. dimensions and units, order of magnitude - scaling) and geographical (single and multivariate spatial-temporal interaction and nature - type - and significance of variables - e. g.).
The critical sense of the data used (qualification, nature, meaning, representativeness, standardization, etc.) and the methodological choices (justification of the choice of methods, appropriate thresholds, etc.) will also be taken into consideration during the evaluation.
In addition, the answers will also be evaluated on the basis of the quality and originality of the graphic illustrations, and the spirit of synthesis and relevance of the different deliverables.
The final defense is the outcome of the project, and two scenarios are emerging:
Either the student demonstrates full control of the teaching unit and validates the course Either the student presents areas for improvement on certain points which will be the subject of a second defense at the end of the quadrimester in order to rework and perfect any deficiencies

Work placement(s)

Organizational remarks

Contacts

Florent Poux, Chargé de Cours Adjoint
Unité de Géomatique, Allée du Six Août, 19
Tél. 04 366 5986