FreeIMU

About positioning in 3D space

Asked by fernando

FreeIMU is great! The algorithm for orientation is fabulous! But I wonder, for gamming purpouses, like Wii, PS Move, both suffer from deadreckoning one way or another(wii with the camera in the wiimote, and move with the ps eye).
Could be a way of implementing positioning, even with some acceptable drift that could be corrected when deadreckoning deseapear? Let´s say, 15 minutes with a error margin of 15cm diameter?
GPS is not viable, and some rooms don´t have space for 2 cameras(and that would increase difficulties in tracking points).
I´ve heard that Francesco Ferrara has developed a ultrafast AHRS algorithm, could that be used in games?

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Fabio Varesano (fabio-varesano) said : 		#1

Hey Fernando, thanks for your question and for your interest in FreeIMU and its algorithms.

I only worked on orientation sensing algorithms so I don't currently have the knowledge to help you on this.

However, I do know that Sebastian is at work on something similar to this. Check this out: http://www.youtube.com/watch?v=6ijArKE8vKU

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fernando (fernandohildebrand) said : 		#2

I´ve been in touch with Mr. Sebastian about that, he said that his new plataform (x-IMU), great piece of hardware BTW, but he claims that something not based on a constant gait, like a person wlaking steps, would be almost impossible, that you would get great drift in less then a sec.
So I´m still kinda lost, still searching...
mcnames in youtube is also working in this, and it seems that he´s getting good results, but he didn´t publish anything about his work... :(

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Fabio Varesano (fabio-varesano) said : 		#3

Wow, http://www.youtube.com/watch?v=htoBvSq8jLA looks great! Have you tried getting in touch with him?

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fernando (fernandohildebrand) said : 		#4

Only throught youtube. He said to ping him in a couple of weeks so he can send the project/paper.
But since I am nobody in this group, like you, Sebastian and more, I suggest you get in touch with him too.

Man, if we could sum up the board you´ve showed me in another question with BT and positioning in the fusion algorithm, we could take Wii and Move down as old malfunctioning clocks...

The results would be amazing!

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fernando (fernandohildebrand) said : 		#5

Also I´ve found this http://homepages.inf.ed.ac.uk/ayoung9/papers/Young_IPSN_2010.pdf on the net. I´m not a matematitian, so I can only grasp some concepts, but it seems a good place to start in adding positioning.

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Fabio Varesano (fabio-varesano) said : 		#6

That's a pretty cool paper.. I'll give it a deeper look soon.

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fernando (fernandohildebrand) said : 		#7

Cool! Please let me updated on the subject....

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