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DAVID-Laserscanner Forum • View topic - David: Art for blind people - The Matisse project
Dear DAVID Community,

As you are probably aware, the entire DAVID company, team and product range has been integrated into HP Inc.
This forum is now read-only. Relevant content has been migrated to HP and merged into HP's Support Forums on November 1, 2016.

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David: Art for blind people - The Matisse project

Anything that doesn't fit the other topics should go here.

David: Art for blind people - The Matisse project

Postby hal » Wed Jun 15, 2011 12:04 am

Hello,
in this thread I want to present to all the David community my latest . The discussion will be from "two voices" :wink: . One from the French company that I worked for, and the other will be the my direct experience's report about this amazing opportunity that I had. Thanks Marie and Philippe!!!

INTRODUCTION
The last May 23 I was in Paris to for a collaboration with the French company "". These great guys are working on interesting projects about the comunication for blind people (in the next posts they will explain better ad deeper their job and research).
This particular project was created in association with the MAM/ARC Museum. The have many amazing pieces of art, and in the Matisse room, near the famous "", there is a great piece of art by Henri Matisse: the big bronze statue "".
Tactile Studio aim to create a digital survey of the statue and create a real copy of it, milling the 3D data. The noble purpose is to allow blind people to touch it and have experience of an important piece of art of the great artist . (Because conservation problems and safety of the original statue, the museum don't permit to touch directly the bronze surface).

This is the statue. In the next images, in the photos where the scanner rig is placed near the statue, you can see how big it is.

MatM_Matisse_NuDeDos.jpg

THE SCANNING PROJECT
My role was to acquire the 3D data, using David Laser Scanner.
Tactile Studio, with my suggestions and with the precious (well, i must to say "absolutely necessary") help of the esteemed forum user WalterMo (many many thanks Walter!), created its own system of motorized scanning, like the scanner that I used in .
These the specs of my equipment:
- ;
- ;
- + via Usb created by WalterMo;
- ;
- A stable + its .

CALIBRATION
The calibration was done with two A3 sheets, one for the right, one left sheet with markers. The corner had flat panels and the 90° angle was precise because a second angle guide, milled with the CNC, was placed at the top of the panels.

MatM_Matisse_Calibration_01.jpg

MatM_Matisse_Calibration_02.jpg

MatM_Matisse_Calibration_03.jpg

In comparison with the Florentine scanning job, now the camera is placed nearest, more close to the paneles/object. Because the lens, now is a 6 mm of focal lenght. The camera view si "wider" than with a 12 mm.
The calibration was successfull at the first time and the green feedback vectors were very short and well oriented. So I was ready to move forward.
After the camera calibration, I've done the Laser calibration and started the Reference scan. Scanner speed at "M", the slower value.

MatM_Matisse_Calibration_04.jpg

Just to check if all was ok, I've done a Repetition scan of the empty corner. After that I've overlapped the Reference scan with the Repetition scan, in ShapeFusion, and check that the overlapping is perfect, I moved forward to the scan.

SCANNING
I wanted to catch more details as possible, so I've used a "small" calibration camera area. To survey all the front of the statue (we don't need the borders because they will be losted into the milling process [3 axis CNC]) I've done 37 single scans, with a minimum shared area between every scans.

MatM_Matisse_Scanning_01.jpg

MatM_Matisse_Scanning_02.jpg

When I've saw the statue for the first time, in a photo, I thought that the dark and quite shiny bronze surface is a real problem for the scan, especially near the edges of the sculpture. But with the 15 mW laser I could reduce at min. the exposure value and all goes perfectly: the laser line detected was thin, sharp and bright, without light noise or any kind of artifacts.
I am really satisfied about the green focusable and powefull laser.
The scan work required a lot of time (approximately from the 11.00 a.m. to the 17.00 p.m.) but the results were more than satisfying. After every scans, I've aligned the acquired mesh with the previous. A quick and rough alignment is a great way to check if all is ok and if I'm missing some areas. Very good trick to avoid holes in your scans.

THE MESH
The acquiring step was finished. The fine alignment, editing and fusion was done when I left Paris to came back at home, in Italy.
The scans were completed (as I wrote we needed only to scan the main front of the statue and some undercuts, but not the borders, the sides) and there were no missed areas. So I've started the fine alignment, the editing of the scans (cleaning of noise and unwanted areas).
Here you can see all the arranged scans:

MatM_Matisse_ScansArranged.jpg

In the next images (ZBrush bronze material rendering) are visible all tha smaller details on the dark bronze surface.

MatM_Matisse_Scan1.jpg

This is the main Matisse signature.

MatM_Matisse_Scan2.jpg

and these are the mark of the foundry and, in the upper side, there is the number of the bronze copy. When you read 00/10, as this case, usually means that the "00" is the "artist's copy": in other words this means that the bronze statue wasn't for the market of art and for the collectors, but reservated to the artist. Many artists, in the history of the art, collect their "00" copies and sell them only when they have problem of money. You can see these copies like an "assurance" or a "pension" of the artist :wink:

Well, came back to the fusion step of the scans: I wanted to save all the details, but the number of the meshes and their point density were proibitive for one, big fusion at one time. And my pc have only 4 Gb of RAM, so...
I've choosed to divide the whole mesh in different areas, and fuse only the required scans for that area. With this simple trick I can keep high the Poisson values (used value: 1200) and avoid memory crashes.

MatM_Matisse_Areas.jpg

MatM_Matisse_Areas_01.jpg

At the end, I've done a patient work of seam, between all the fused areas. The job was done with the software 3D Studio Max and RapidForm.
This is the final result (please note that the thickness of the mesh was created by me, just to close the volume and have a good file ready to be milled):

MatM_Matisse_Final Mesh_01.jpg

MatM_Matisse_Final Mesh_02.jpg

MatM_Matisse_Final Mesh_03.jpg

MatM_Matisse_Final Mesh_06.jpg

MatM_Matisse_Final Mesh_07.jpg

MatM_Matisse_Final Mesh_05.jpg

MatM_Matisse_Final Mesh_04.jpg

MatM_Matisse_Final Mesh_08.jpg

And here a quick rendering of the mesh with the photo of the front of the statue, overlapped, like as a texture.

MatM_Matisse-QuickPreview+Texture.jpg


Hope to post soon others renderings and a some videos.

THE MILLING PROJECT
As wrote, the final goal will be to have a copy of the statue, ready to touched by blind people.
Tactile Studio team is working on this aspect in these days, so, They will post their result soon.

Stay tuned! :D



Regards,
Mattia
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Re: David: Art for blind people - The Matisse project

Postby pottersfriend » Wed Jun 15, 2011 4:10 am

Hal,

What a wonderful project. Great scans for a great cause!

Darin
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Re: David: Art for blind people - The Matisse project

Postby Khalid Khattak » Wed Jun 15, 2011 6:22 am

Hi Mattia.. That is reallly a great work and we are really proud that David and Mattia can do marvelous scans... My Questions:
1- You stick the paper with tape on calibration panel. Once your calibration carried out you remove the paper and then do reference scan. During removal of the paper do you damaged the paper?.. Are the sticky tape remains on the board?.. and for recalibration you use the same paper on same location?..Do you have some reference positions where you install the paper...

2- You show us seams of the scans which you have removed with the help of studio max and Rapidform... Why these seams appears if your scans are perfect?

Overall you have done a great work and your 15mW laser seems to bright :).. and You are slim and smart guy (in picture)... And in Paris you must have some new girl friends (Just kidding);)

I know you are a busy man but I wish if you post the comparison of taking Reference scan with Calibration paper and without calibration paper :)

My Regards
Khalid
PC: Dell Inspiron i3, 2.27GHz,4GB RAM,64 bit windows 7
CAMERA:
David CCD Mono USB
LASER:
David 5mW Green line laser
PROJECTOR:
3D LED Mini Projector 250lumens, Native 1024x600
[b]http://free3dscans.blogspot.com/
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Location: Pakistan

Re: David: Art for blind people - The Matisse project

Postby Victor.Lamoine » Wed Jun 15, 2011 7:44 am

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Re: David: Art for blind people - The Matisse project

Postby Khalid Khattak » Wed Jun 15, 2011 7:49 am

PC: Dell Inspiron i3, 2.27GHz,4GB RAM,64 bit windows 7
CAMERA:
David CCD Mono USB
LASER:
David 5mW Green line laser
PROJECTOR:
3D LED Mini Projector 250lumens, Native 1024x600
[b]http://free3dscans.blogspot.com/
Khalid Khattak
 
Posts: 942
Joined: Thu Apr 23, 2009 1:30 pm
Location: Pakistan

Re: David: Art for blind people - The Matisse project

Postby WalterMo » Wed Jun 15, 2011 9:38 am

Hi Mattia,
Thanks for the detailed report about this great project in Paris. And as usual: Perfectly done!

Let's hope that we get the permission for our planned "Henry the Lion project" in Braunschweig.

Walter
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Re: David: Art for blind people - The Matisse project

Postby Philippe_tactile » Wed Jun 15, 2011 10:34 am

Hello to all the DAVID community !

As Mattia explained, we are a small french company specialised in touchable objects for blind people. We work essentially for museum or public entreprises.
We are 4 people covering all the process of such a project : cultural mediation / drawings concepts / CNC milling and interactive technologies (in case of an interactive "speaking" object).

We just bought a DAVID laser scanner and the very kind and honorable Mattia give us a very useful help on this first project, trying to demonstrate to the MAM museum that digital technologies can be very usefull to duplicate masterpiece for blind people.

By the way, we have 3 CNC milling machines (3 & 4 axes).

So... Mattia send us last week the mesh you've seen. We tought that milling this kind of form was a piece of cake... In fact, not at all. :D
The variation levels of the surface were quite high (we've planned to reproduce a 1/4 scale model : approximately 50 cm x 30 cm model). So we need special milling tools (very very long ones) to produce the model, so we have to deal with the problems due to long tools (increase on vibrations, loss of accuracy, etc.).

Finally we managed to bring back to the real world the Matisse scan :)

Here is some pics of the raw model before finishing processes...


Image

Image
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Re: David: Art for blind people - The Matisse project

Postby Philippe_tactile » Wed Jun 15, 2011 10:36 am

Note : I v'e forget to thanks Walter for his precious participation on this project !
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Re: David: Art for blind people - The Matisse project

Postby Khalid Khattak » Wed Jun 15, 2011 10:51 am

Hi Philippe_tactile
Very nice results and thanks for posting the CNC machined replica.. If you have problem to deal with High Z CNC machining, I can help you in this.
Regards
PC: Dell Inspiron i3, 2.27GHz,4GB RAM,64 bit windows 7
CAMERA:
David CCD Mono USB
LASER:
David 5mW Green line laser
PROJECTOR:
3D LED Mini Projector 250lumens, Native 1024x600
[b]http://free3dscans.blogspot.com/
Khalid Khattak
 
Posts: 942
Joined: Thu Apr 23, 2009 1:30 pm
Location: Pakistan

Re: David: Art for blind people - The Matisse project

Postby dickda1 » Wed Jun 15, 2011 7:34 pm

This is very nice work and for a good cause.

Thank you for the very detailed pictures and explanation as well. This helps me (and I am sure others) develop our own setup.

Dick
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Postby hal » Wed Jun 15, 2011 9:41 pm

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Re:

Postby Victor.Lamoine » Wed Jun 15, 2011 10:11 pm

Hello,

I suggest you tu use Blender, it has a very powerfull lasso selection mode, probably the best between 3DS max, MeshLab. I tried to import 1.8 million points in Blender, it works but it has not a great framerate (10FPS I think)
Maybye asking a Blender expert about vizualisation parameters would solve the problem :)

Thanks for the additionnal details.

If you want your files to be light, use PLY binary format. A 112 mo .OBJ files become 73 mo in PLY (binary!).
The OBJ files are encoded in ASCII (you can modify it with a notepad) that's why they are very heavy. The STL can be encoded in binary but the structure is longer than the PLY, thats why PLY is a good format (and you just need MeshLab to get a STL and send it to the CNC... !)
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Re:

Postby Philippe_tactile » Fri Jun 17, 2011 11:24 am

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Re: David: Art for blind people - The Matisse project

Postby Khalid Khattak » Fri Jun 17, 2011 2:57 pm

hi philipe,
can you post the picture?..what are the price..i wish David have simple single sheet calibration...
PC: Dell Inspiron i3, 2.27GHz,4GB RAM,64 bit windows 7
CAMERA:
David CCD Mono USB
LASER:
David 5mW Green line laser
PROJECTOR:
3D LED Mini Projector 250lumens, Native 1024x600
[b]http://free3dscans.blogspot.com/
Khalid Khattak
 
Posts: 942
Joined: Thu Apr 23, 2009 1:30 pm
Location: Pakistan

Re: David: Art for blind people - The Matisse project

Postby Philippe_tactile » Tue Aug 30, 2011 9:59 am

Hello to all,

Come back from a long hard work period (and short holidays... :-) )

Here is the picture of the Matisse finished :

Image
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