St. John - Reconstruction

[hal]

Hello Davidians,

I want to share with you my latest work in progress: as you can read in my old post about Cultural Heritage ( http://www.david-laserscanner.com/forum ... .php?t=534 ), David Laser Scanner can be useful in the art conservation too.

In this case, my target is a Virtual Reconstruction of an ancient sculpture, representing St. John Baptist child (some historian attributes that to young Michelangelo sculptor). Is a partially destroyed marble object of art, coming from Spain. It is tall approximatly as a real boy of 10/12 years old.

Actually we have only 17 pieces of it: my work is reposition them in a right position, using only 4 old photos (no other documentation) and to reconstruct the compleate shape of the St. John.

Is an hard work, but the first step was simple, thank to David. The scanning was made 1 month ago, with DLS 1.6b and 4:3 calibration panels.

Is a Work in Progress and here below only three image of my first test of reconstruction: scans, rebuilding of the topology (Low and High details) positioning of the pieces, volumes sketch (with pieces from generic 3D puppet of a child), re-drawing of the missing shape.

Soon as possible new images about this work. Bye.

Mattia

[hal]

... and an image of my new laser-motor, helpful for this "St. John" work. It is a 3 rpm driving with a speed modulator and direction switch. But at the lower speed was to much fast, and my 30 fps camera couldn't capture every depth points.

I've added a pulley and now all works fine:

- before pulley -> 0,5 rpm

- after pulley -> 0,1 rpm

Many thanks to Alessandro, the man who have done the driving setup and the controller + modulator.

p.s.: in the image below, in the first shot we can see the camera, in the second a test with my "old" timer sistem, and after the new motor.

Mattia

[SAVstudio]

I love the work you are doing Mattia. Your love of it and your commitment are apparent each time you post such things. Please continue to do so.

And to Simon and Sven (and all the users who have added their time and knowledge to help improve DavidLaserScanner) it is amazing that you have made this available to everyone to be used for such things as Mattia's work free of charge.

Thank you.

[Bongobat]

Jedi master I have a question? What happened to the statue in the first place that it has to be reconstructed? Im guessing at some point it was together not so long ago becuase there are photographs.

P.S Your work is amazing and important thank you.

[hal]

Hello dear Davidians,

@ SAVstudio: thanks for your words.

@ Bongobat: thank you for the compliments. About the unlucky statue: the photos were taken long time ago, I think before 1940. Placed in a church in Spain, it was destroyed during the Francoist regime, during the Spanish civil war. The few information speak about an "iconoclast vandalic action". During the fighting between the Spanish "blue division" of fascists and the reds Russian, these last destroyed the statue. The St. John marble statue was removed from its niche in the wall and throw in the square in front of church, with others ecclesiastical objects. At the end, the soldiers burned everything. Some marbel pieces have, at now, dark areas of surface, damaged from fire.
A funny thing (the only one in this orrible story of human stupidity): The head, until 1980, was missed. Accidentally, an italian historian, recover those in a public office. It was on a table, used as paperweight.

Mattia

[humanticnc]

Hi Hal
The absent pieces CNC is needed to bite .
Tibor

[Steve68]

In the pictures of your scanning setup you are scanning the head, but I don't see the calibration points behind the head. Can remove the calibration points after you calibrate the camera?

Thanks,
Steve

[Bongobat]

Hi Steve68,

Yes you can remove the calibration pattern as long as you dont disturb the panels system or corner while doing it.

[MagWeb]

Hi,

additional note to remove the patterns:
Fix them on separate boards and add their thickness (thickness*60/used scale ) to the zero-values of the calibpoints.dat. Or use the calibpoints-calculator I posted at:
http://www.david-laserscanner.com/forum/viewtopic.php?t=376

nice day
Gunter

[hal]

Hello Steve68,

Yes sure, I've removed the calib-panels after calibration, as wrote Bongobat and MagWeb.

This way is a good one if you ave a locked system of camera/panels. A rigid-setup allow you to move the object and scan differend objects without the risk to crash the calibration.

Have a nice scans (please, Davidians, the gallery of art of this forum cry! More scans and experiences are indispensable... Came on! Get a scan-test, refine your scans and set free your imagination)

Mattia

Edit: 30 June 2008

Here below three new images about this work in progress. The second is a comparison between the reconstructed head, starting from only two elements. They were scanned with David, obviously

Mattia