The document discusses the process of reverse engineering, which involves 4 main phases: 1) data acquisition using laser scanners, 2) preprocessing the data, 3) segmenting and adapting the scanned surface, and 4) creating the 3D model. Laser scanners are used to precisely and quickly acquire large amounts of data on an object's external shape through point clouds. Reverse engineering has applications in architecture, industrial/mechanical fields, criminology, accident reconstruction, healthcare, and more. The document also describes a visit from an expert who gave lessons to students on reverse engineering and demonstrated the use of a laser scanner.

1. La Reverse Engineering

2. Contents
1. Reverse Engineering
techniques: from the physical
object to the 3D digital model
2. Classification of acquisition
systems
3. Active RE systems: laser
scanner based on the principle
of triangulation
4. Laser scanner 3d: what it is and
where it is used
5. How to use the Z + F5010x laser
Data acquisition and
post-processing
Laser scanner Z+F5010

3. The main phases
The process is divided into a sequence of
phases, both hardware and software in which
there is a significant human contribution.
The 4 main phases are:
1. data acquisition;
2. preprocessing (or pretreatment of data);
3. segmentation and adaptation of the surface;
4. 3D model creation.
Acquisition of mechanical machine

4. Purpose of the acquisition
A distinction can be made between
Analytical reverse engineering and
synthetic reverse engineering.
- In the Analytical reverse engeenering
the purpose is to obtain a 3D digital
model in order to perfect cloning
- In the Synthetic reverse engeenering
the aim is to obtain a CAD model on
which to make changes

5. Data acquisition
The first phase, the data
acquisition, is the one in
which the external shape is
detected, through the
construction of a cloud of
points belonging to the
surface of the object.
Recap software for cloud point acquisition

6. Why it is used
1. For precises measures;
2. Many measures in a little time
3. Data acquisition and saving
speed;
4. Use clear and simple data.
A pile dimension in the area of my school

7. Where it is used
1. Architectural (conservation of cultural heritage)
2. Industrial-mechanical (expansion of plants)
3. Criminology (Reconstruction of the scene of crime)
4. Road accidents (Braking measurement- impact
vehicles)
5. Hospital (prosthesis construction)
Crime scene Car crash Part of car engine

8. Lessons at school
An expert of reverse engineering named Enrico
Squillante came to our school and with my teacher
they made us lessons about RE.
Second lesson with Enrico
First lesson
Enrico at work

9. Laser measurement
During the laboratory we learned how to use the laser
scanner and we made some scans together.
Enrico with the scannerA student working on the projectThe exterior of our school

10. I want to thank all my teachers, Enrico and
my school for giving us the opportunity of
this experience about Reverse Engineering.
Thank you for your attention.