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(LiveLeak) Video First robot to solve a Rubik's cube in under a second   (liveleak.com) divider line 14
    More: Video, cubes, robots  
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7089 clicks; posted to Video » on 27 Sep 2013 at 9:56 AM (1 year ago)   |  Favorite    |   share:  Share on Twitter share via Email Share on Facebook   more»



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2013-09-27 02:15:01 PM
3 votes:
The stolen LiveLeak video is 1:56 long. They trimmed it down from 2:27 and got rid of a lot of the source info. The original is from Dec 19, 2011.

YouTube:
img.youtube.com
CubePrime - Robô que resolve o Cubo Mágico em menos de 1 segundo!
by Renan Cerpe·- 95,091 views
Uploaded on Dec 19, 2011
- Sobre o projeto: http://www.cubeprime.com.br
CubePrime é a primeira versão de um robô que é capaz de solucionar o famoso Cubo Mágico em menos de 1 segundo! Ele utiliza uma Webcam para fazer a leitura do cubo e um software especial para desvendar o mistério muito rápido! Desenvolvido no SENAI de Campinas pelos alunos de mecatrônica
- Fornecimento dos principais equipamentos por Kalatec http://www.kalatec.com.br

CuboVelocidade - Tudo sobre o Cubo Mágico:
http://www.cubovelocidade.com.br
http://www.youtube.com/cubovelocidade
http://www.facebook.com/cubovelocidade
http://www.twitter.com/cubovelocidade
Conecte-se com Renan Cerpe:
http://www.facebook.com/renancerpe
http://www.twitter.com/renancerpe
http://www.instagram.com/renancerpe
http://www.renancerpe.com.br
Loja de puzzles Cuber Brasil:
http://www.cuberbrasil.com
http://www.facebook.com/cuberbrasil
http://www.twitter.com/cuber_brasil
Portal de vídeos YouCube:
http://www.youcube.com.br
http://www.facebook.com/portalyoucube
- Obrigado por assistir e não se esqueça do joinha ;)
2013-09-27 10:16:29 AM
3 votes:
Under a second, except the five minutes to scan it, and all the pre-processing of the moves.  But yea, under a second.

/still never solved it myself.
2013-09-27 10:29:12 AM
2 votes:

ABQGOD: Toquinha: He took way more than 15 seconds to map out the first few movements, plus they used a sticker-less Dayan cube, which is illegal under official World Cube Association regulations (I am not making this up).

He should have used multiple cameras to capture all of the sides at once, and placed those cameras inside the solving box or even on the turning rods. Also, there's really nothing special about a rubik solving program anymore. Build a robot that simulates human hand structures and can manipulate a real cube with all it's creaky joints and friction, and I'll be slightly impressed.


Humans have 15 seconds to inspect the cube before moving the pieces in tournaments.  That seems like a fair rule for a robot as well: there's no reason at all you can't use multiple cameras (or spin the cube automatically) and generate the solution in under that time.  Hell, a guy built a lego robot that can do the entire process in about five seconds
2013-09-27 10:08:44 AM
2 votes:
He took way more than 15 seconds to map out the first few movements, plus they used a sticker-less Dayan cube, which is illegal under official World Cube Association regulations (I am not making this up).
2013-09-27 02:28:07 PM
1 votes:

Mr. Richard Smoker: Haha, I hope the guys that made this see the Lego video and cry themselves to sleep.


I just watched the lego video, and burst out laughing.
2013-09-27 01:17:39 PM
1 votes:

Ishkur: any solved cube can be sufficiently randomized in seven moves


I had somehow remembered that seven is also the 'sufficient minimum' for the number of times to shuffle a deck of cards...
LGT PDF
but there the asymptotic result is 1.5*log_2(52) = 8.55... so now i'm confused why sites that reference this paper say 7 is enough, but whatever.... cheers
2013-09-27 12:36:15 PM
1 votes:

hyperdex: It's not necessarily the case that knowing 5 faces allows one to extrapolate the sixth.

For clarity, we know that the cube has six faces, a top, a bottom, and four sides.  The cube consists of 8 corner pieces, 12 edge pieces, and 6 centers (which do not move).   Suppose the bottom layer of the cube contains the 4 edge pieces with a blue face, and suppose none of those four blue faces are on the bottom face (so all four side faces of the cube have a blue square in the center on the bottom).  Any permutation of these edge pieces that maintains the "blue on the sides" will produce the same 5 faces (top and 4 sides) but the bottom face will be different.


Good point.
2013-09-27 12:34:38 PM
1 votes:

Toquinha: He took way more than 15 seconds to map out the first few movements, plus they used a sticker-less Dayan cube, which is illegal under official World Cube Association regulations (I am not making this up).



Worse than that, it's not even a Dayan cube, with the recesses in the center sqaure. Headline is completely wrong. This is barely interesting. Nice project, but nothing amazing happened here.
2013-09-27 12:19:35 PM
1 votes:
It's not necessarily the case that knowing 5 faces allows one to extrapolate the sixth.

For clarity, we know that the cube has six faces, a top, a bottom, and four sides.  The cube consists of 8 corner pieces, 12 edge pieces, and 6 centers (which do not move).   Suppose the bottom layer of the cube contains the 4 edge pieces with a blue face, and suppose none of those four blue faces are on the bottom face (so all four side faces of the cube have a blue square in the center on the bottom).  Any permutation of these edge pieces that maintains the "blue on the sides" will produce the same 5 faces (top and 4 sides) but the bottom face will be different.
2013-09-27 11:32:27 AM
1 votes:

wjllope: was it necessary to scan the 6th side?  (isn't that side known from the other 5?)


Good point.  I wonder if 4 sides would be enough to extrapolate the whole cube.  Keep in mind that not all block positions in cube are possible.  For instance, if you force a corner piece to rotate unnaturally, the cube in unsolvable.
2013-09-27 11:23:21 AM
1 votes:

Kuta: That begs the question, what is the hypothetical maximum number of moves to solve a random Rubik's cube?


No it doesn't.
2013-09-27 11:08:00 AM
1 votes:
I think the LEGO mindstorm robot was more impressive.
2013-09-27 10:40:33 AM
1 votes:

Kuta: what is the hypothetical maximum number of moves to solve a random Rubik's cube


A quick search reveals the answer is 20. 20 Moves or less to solve any cube.
2013-09-27 10:20:14 AM
1 votes:

Toquinha: He took way more than 15 seconds to map out the first few movements, plus they used a sticker-less Dayan cube, which is illegal under official World Cube Association regulations (I am not making this up).


He should have used multiple cameras to capture all of the sides at once, and placed those cameras inside the solving box or even on the turning rods. Also, there's really nothing special about a rubik solving program anymore. Build a robot that simulates human hand structures and can manipulate a real cube with all it's creaky joints and friction, and I'll be slightly impressed.
 
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