New short link!

segunda-feira, 12 de setembro de 2011

David 3D, e mais

O programa David, um Scanner 3D cada vez melhor, está na versão 3.0:


A newsletter é tão cheia de coisas boas, que decidi apresentar uma parte, tal-qual:

New DAVID Version 3
Voilà: After more than a year of development, DAVID 3.0 is now available!
The most important innovation:
DAVID is the first and only software that supports both, "classic" Laser Scanning AND Structured Light Scanning! The Structured Light method is presented below.
Also, the completely new user interface (see below) makes DAVID3 more flexible, extendable and user-friendly.
Of course the new version is compatible to the same hardware: cameras, lasers, calibration patterns...
As always we offer a Free Version for everyone. Please feel free to test everything! Only saving results is limited. Download DAVID 3 now!
If you would like to purchase a license, please click here.
Of course if you already own a DAVID 2.x license or original USB key, you can upgrade to DAVID 3 at a lower price.

To purchase your upgrade, please contact your local reseller or visit our shop.

Structured Light Scanning
Structured Light (SL) makes scanning faster and easier! For this method you can use a standard video projector instead of the line laser.
This animation demonstrates the setup:


The video projector is connected to the PC and DAVID 3 uses it to illuminate the object with several stripe patterns. Click "Start" - wait a few seconds - see 3D result on screen!
Our Mexican reseller VISI Series has already tried it and made a short demo video (thank you!). Watch this video on YouTube.
Of course an SL setup needs to be optimized and calibrated (first the camera, then the laser). Our DAVID 3 user manual will guide you through it.
So what are the pros and cons of Structured Light Scanning compared to Laser Scanning:
+ Scanning without calibration panels in the background! (Panels are only initially required for camera and projector calibration.)
+ Much faster
+ One-click scan
+ No moving parts / no influence of hand tremors etc.
+ Can use photo camera, e.g. DSLR (still not recommended, but will be great and comfortable with a future DAVID version - work in progress)
- Projector prices are dropping, but they are still more expensive than lasers
- Room needs to be rather dark, usually darker than required for laser
- Not suitable for very small details on small objects because projectors usually can't be focused to very short distances
You should definitely give it a try!
E já vos disse que tem uma... Versão grátis desse programa?
Pois...

E como não fosse tudo eis mais 2 links para impressão 3D, sim, também da Newsletter!

All  in 3d:

Often, interesting ideas do not get the attention they deserve. In a presentation they lack that certain something, the transfer from intangible brainchild to tangible, true-to-life object. One or another idea can be acceptably outlined by pictures and texts, but any type of creative conceptual design turns into a real eye-catcher only when showing its third dimension. This is when imagination transforms into a physical likeness and literally takes shape, when a thought turns into a real “object of desire”.

At 3D-Idea, we make this come true for you.


...E Rapid Objects:
http://www.rapidobject-shop.com/en/products




Um Jet-Pack já à venda!

After Record-Making Flight, Martin Jetpack Will Soon Be on Sale
Buy one next year for just $100,000
By Gregory Mone

In May, inventor Glenn Martin—along with fire-rescue officers and crews on board a pair of chase helicopters—watched as his jetpack flew for nine minutes and 43 seconds, soaring 3,500 feet into the New Zealand sky. Had the machine been holding a live person instead of a 150-pound dummy, it would have smashed the record for the longest and highest jetpack flight ever. Every other such device in history has managed to be airborne for, at most, only a minute or two. But Martin was out to do more than set records with his demonstration. He wanted to prove that his design was safe enough to become the first commercial jetpack—one anyone could buy and fly.



E para o fim, por hoje, Nanotubos de Grafeno para substituír o fio de Cobre.

Lightweight Cable Made of Braided Nanotubes Could Replace Copper Wires
By Rebecca Boyle

Cables made out of nanowires could be just as efficient as the copper cables we’ve been using for more than a century, but at a fraction of the weight, according to a new paper. Braiding billions of carbon nanotubes into a nanowire cable can efficiently replace copper in a light bulb circuit.

Traditional cables are made by braiding or twisting together two or more wires or optical fibers, usually metal or silicon, to carry a current or signal. In a new study, Rice University researchers instead used double-walled carbon nanotubes, made of concentric rolled-up sheets of graphene.

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