# Recent content by Herbert Kociemba

1. ### Reading Rubik's Cube states into computer using Computer Vision magic

Yes. In the function grab_colors in vision2.py you can substitute the code given between "def grab_colors():" and "bgrcap = cv2.blur(bgrcap, (5, 5))" in the original code by the lines given below if the image has the name test.jpg and is in the same directory as vision2.py. def grab_colors()...
2. ### Reading Rubik's Cube states into computer using Computer Vision magic

I do not think I can do this successfully. Think alone at the different lightning conditions on the different faces which makes this difficult. So I will stay away from this.
3. ### Reading Rubik's Cube states into computer using Computer Vision magic

I more or less finished the project and the computer vision now also works with the Raspberry Pi and it's camera module. Some more information how to use the program can be found here: http://kociemba.org/computervision.html
4. ### Reading Rubik's Cube states into computer using Computer Vision magic

Faster than I thought I was able to integrate the computervision part. The files are uploaded to Github now. Here is an example how the parts work together: http://kociemba.org/videos/visiongui.avi Yet some critical explanations are missing how to handle the sliders for the filters which is...
5. ### Reading Rubik's Cube states into computer using Computer Vision magic

This thread is dead since 2011 but since I are also do some experiments with Python and OpenCV I decided to revive it instead of creating a new thread. The link http://www.cs.ubc.ca/~andrejk/525project/ from above also is dead and I want to ask if anybody here has a copy of the code or a...
6. ### Can kociemba or other method solve the Rubik in 5 faces turn only?

Great, so indeed your proposition is possible too because <U, R2,F2,L2,B2> generates all phase 2 states. But I suspect that the average maneuver length will be higher because the branching factor is lower than with <U,D, R2,F2,L2>. It really took me some effort to get my version work...
7. ### Can kociemba or other method solve the Rubik in 5 faces turn only?

Because if I fix the D face then in phase 2 I only can generate <U, R2,F2,L2,B2> and I do not believe that it generates all phase 2 states. Or can you give for example a generator for D in <U, R2,F2,L2,B2> ?
8. ### Can kociemba or other method solve the Rubik in 5 faces turn only?

I have no idea why kociemba.org should not work. But nevertheless I put the Python project to Github. The memory requirements are relatively large (250 MB). What is quite interesting that it takes only about 2 moves more on average when fixing a face. Spending 2 s for each computation, for 50...
9. ### Can kociemba or other method solve the Rubik in 5 faces turn only?

I worked the approach I described above out and the modified two phase algorithm gives solutions with an average of less than 22 moves. Here is for example the cube in the cube pattern without using B moves: R2 F2 U R U2 L F2 R' L2 U2 L F U F2 U2 R2 U' (17f) The hardest postion from the...
10. ### Can kociemba or other method solve the Rubik in 5 faces turn only?

Another question is how this relates to the two phase algorithm. If we define as usual the phase 2 as the states which are generated by <U, D, R2, F2, L2, B2> it is more natural to ignore for example the B2 move. We have B2 = U D L2 R2 U' D' F2 U D L2 R2 U' D' with all moves valid in phase 2...
11. ### Cube Explorer Help with Generating Algs

Using left-click, right-click and ctrl+left-click you can get which would be your R U R' setup. With "Add and Solve" you then find maneuvers for this. You can exclude some faces if you want. By changing the locations of the diagonal pattern you can get the other 7 cases, for example
12. ### 43 Quintillion is Wrong

And if you do not take only symmetry into account but also the fact that for example U F' D2 and D2 F U' are positions which are just inverse positions of each other and hence have in a certain sense the same structure and need the same number of moves the number of "true different positions"...
13. ### Kilominx God's number bounds

This reminds me of a similar behavior concerning the more difficult to find God's number for all these puzzles which also seems to be only a few moves away from the easy to find lower bound, 20 moves versus 18 moves for Rubik's cube for example. This is intuitively quite clear. If you have for...
14. ### Kilominx God's number bounds

I did an analysis for Megaminx https://www.speedsolving.com/forum/threads/lower-bound-for-megaminx-in-htm-and-qtm.35724/ some time ago. I see no reason why this argumentation should not hold for Kilominx since it has the same set of commutating and not-commutating moves. Especially the number of...