DE Conferentie 2004 Julien Noel

Arnhem - 02 december 2004

J. NOEL - DIGISENS

3D Digitization and visualisation using microCT scanner

3D volume digitization and visualization

DIGISENS S.A.BP 278 Savoie Technolac 73375 Le Bourget-du-Lac Cedex-France

Tel :+33(0)4 79 65 89 16email : [email protected]/museo

Applications in Cultural Heritage

Julien NOEL


J. NOEL - DIGISENS


DIGISENS S.A.BP 278 Savoie Technolac 73375 Le Bourget-du-Lac Cedex-France


DIGISENS

Software development for microCT and CT applications :

- Calibration software

- 3D Reconstruction software

- 3D Volume and surface rendering / analysis software

3D CT and microCT solution provider for :

- industries

- universities

- museum’s laboratories

Winner of the European IST Prize (Information Society

Technology) : www.ist-prize.org

First prize of the 2004 SITEM Innovation Award

(International Show of Museographical and Heritage-

oriented Technology)


J. NOEL - DIGISENS


3D Micro Computed Tomography

Principle

Acquisition

Reconstruction

Visualization


J. NOEL - DIGISENS


3D Micro-CT (Micro Computed Tomography) is a non destructive X-ray technique for internal expertise and volume digitization.

Definition

Advantages :

- Volume digitization (volumical data)

- Complete digitization of entire objet, without shaded zone

- Compatible with all material, even black, brillant and transparent surfaces

- Non deteriorative scanning

- High precision (0,005 mm)

- Fast digitizing (1 hour / object)

- Density segmentation

- Real time visualisation

Drawbacks :

- Size limitation

- No color


J. NOEL - DIGISENS


3-D Computed Tomography

X-Ray technology

Digital detector

microCT : Microfocus X-Ray tube


J. NOEL - DIGISENS


Principle


J. NOEL - DIGISENS


360 digital radiographs

Cone-Beam reconstruction

Volume rendering (voxels)


J. NOEL - DIGISENS


Radiography X Tomography X

2D slice 3D rendering

Tomography X


J. NOEL - DIGISENS


• Back projection

x = A -1 b

2 4 8

16 36 90

Computed Tomography reconstruction


J. NOEL - DIGISENS


e.g Ramp filter

Filtered Back Projection


J. NOEL - DIGISENS


3D digitization and visualisation using microCT,

for

Museums & Research Centers applications

Some examples of 3D digitization with 3D CT technology and volume rendering software


J. NOEL - DIGISENS


Surface scanningStructured light

Laser scanning

Multi-spectral

Drawbacks :

- No internal information

- Slow process

- Low details

- Shaded zones

- Can’t work with black, bright or transparent surface


J. NOEL - DIGISENS


Human skulls with 3D CT scanning


J. NOEL - DIGISENS


Human skull


J. NOEL - DIGISENS


Closed wooden box :

how to discover internal and invisible

objects


J. NOEL - DIGISENS


Real Picture 3D rendering

(possibility to apply mapping textures)

Grenoble Museum’s collection

African sculpted box. MHNGr.1979.633


J. NOEL - DIGISENS


African sculpted box. MHNGr.1979.633

The internal view with transparency of the wood reveals shellfishes, plants and grains.

In fact it seems to be a shellfish necklace.

Shellfish virtual extraction by selection of an expected range of density.

3D virtual cross-section to discover the inner objects



J. NOEL - DIGISENS


Talisman : discover all about mysterious objects


J. NOEL - DIGISENS


Lyon Museum’s collection

Talisman from Madagascar

External volumical view of an african talisman

Segmentation of high density components : 3D view of the hook and dicovery of a pearl.

2D high resolution CT slices of the pearl and the hook


J. NOEL - DIGISENS


Talisman from Madagascar

Lyon Museum’s collection3D surface rendering of the hook and the pearl : detailed views and transparent rendering


J. NOEL - DIGISENS


Paleolagus Fossil : how to virtually extract bone from

stone


J. NOEL - DIGISENS


Grenoble Museum’s Collection

Paleolagus haydeni, Wyoming (USA), oligocène.

Digitalization and 3D volume rendering of a 35 million years fossil.

The aim of microCT scanning is here to study the skull by virtually removing the stone.


J. NOEL - DIGISENS


Paleolagus haydeni, Wyoming (USA), oligocène.

Grenoble Museum’s Collection

Virtual extraction of the bone and real time 3D visualization


J. NOEL - DIGISENS


Hornet

Very high resolution digitalization applied to

insects – internal 3D anatomy analysis.


J. NOEL - DIGISENS



J. NOEL - DIGISENS



J. NOEL - DIGISENS


Rodent : classification of the animal by studying internal teeth


J. NOEL - DIGISENS


3D real time cross sections of the teeth to determine the specie


After comparison with literature schemes, we can classify the specie : this rodent is an Arvicola terrestris


J. NOEL - DIGISENS


Ostracod fossil

Real size 2mm

Rabbit’s bone

Junon – Le Louvre


J. NOEL - DIGISENS


Computed Tomography of a small clay pompeian head

CT of a cat shaped coffin

CT and reconstruction made by University of Bologna, Physics department

A cat mummy exposed at the Egyptian section of the City Museum of Bologna

It is possible to see the rest of a cat skeleton without opening the coffin.


J. NOEL - DIGISENS


Human Mandible and teeth


J. NOEL - DIGISENS


VisioFURL

3D volumical visualization & media for :

Museum Exhibitions

Pedagogical courses

Libraries & Database


J. NOEL - DIGISENS


Integration of 3D models into an interactive interface for presentation (exposition) and pedagogy.

VisioFurl


J. NOEL - DIGISENS



J. NOEL - DIGISENS


Research (internal discoveries, fabrication process analysis, species determination …)

Conservative / restorative applications (classification, volume digitalisation of cultural heritage, conservation, restorative applications …)

Exposition (popularisation, demonstration, 3D libraries and database …)

Museums & Research Centers applications


J. NOEL - DIGISENS


How to implement 3D Computed Tomography digitization in Museums, Research laboratories, Universities, or Industries:

Install complete CT and/or microCT equipment with software for scientific analysis (volume rendering) and real time 3-d visualisation (surface/volume rendering)

Rent a CT/µCT equipment for weeks or months in situ

Upgrade any radiographic equipment for 3D CT capabilities


J. NOEL - DIGISENS


Julien NOEL

DIGISENS S.A.12 allée du Lac de GardeBP 278 - Savoie Technolac73375 Le Bourget du Lac CedexTel : +33 (0)4 79 65 89 16Mobile : 33 (0)6 86 61 55 13e-mail : [email protected]

www.digitalscanservice.com

DIGISENS S.A.BP 278 Savoie Technolac73375 Le Bourget-du-Lac Cedex-France


Thanks for your attention

Documents

DE Conferentie 2004 Julien Noel