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 Post subject: Re: Orientation bacpac for kite or strut mount GoPros
PostPosted: Sat Dec 21, 2013 4:25 pm 
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Yah that was perfect. I think my price just went up closer to the $200 range.


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 Post subject: Re: Orientation bacpac for kite or strut mount GoPros
PostPosted: Sat Dec 21, 2013 5:38 pm 
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I'd buy that thing. Sorting out vid orientation is a fricken' nightmare.

I'd pay a few hundo for something that just corrects it at the source.


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 Post subject: Re: Orientation bacpac for kite or strut mount GoPros
PostPosted: Tue Feb 04, 2014 5:32 pm 
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Regarding MATLAB; are you using any super-specialised functions? If it's just a pile of matrix math, you should be able to port it to Octave without too much difficulty--it may even run without modification. There's an Octave FAQ question on porting.

This would remove a MATLAB license as an impediment for other people to try it out--the only cost would be time--with the understanding that Octave is more complicated to install and use than most people are used to.

I'm wondering if the forthcoming ActiveReplay Trace will provide the fidelity necessary to do this sort of thing. One of the project leaders told us that it will export GPX and ACC data.

If you're at all interested, when I get my Trace I can send you some sample data and video; I'm keen to help any way I can. :)


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 Post subject: Re: Orientation bacpac for kite or strut mount GoPros
PostPosted: Tue Feb 04, 2014 7:29 pm 
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Location: Madison, Wi. Cabrinha, Slingshot, Blade, Axis, Epic, OR, Mystic.
Count me in. Very impressive Peter.

Bob
www.kiteridersllc.com


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 Post subject: Re: Orientation bacpac for kite or strut mount GoPros
PostPosted: Tue Feb 04, 2014 9:23 pm 
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My current thoughts on this project are to make the software open source and work with x-io-imu to develop a hardware module that would fit on a Go Pro to produce the necessary data on the audio channel for the rotation corrections.

Regarding Matlab there is quite a bit of specialized functions to both import and export video and functions to the image processing to do rotations, remove lens distortion etc. The processing of the orientation data is a bit more of "just a pile of matrix ops," but leverage pre-existing quaternion libraries. The import/export functions may exist in octave, and the other stuff should be straightforward to translate. Implementing this this in Python/Open CV might also work well. I'm not really interested in translating but would be more than willing to provide my code to someone who would. I'm much more interested in spending any time I have for this project on improving the algorithms for both better rectification in the presence of both rotations and accelerations..sometime it is off by ~ 15 -25 degrees while the kite accelerates and turns (this is a well known IMU problem), and combining small scale deshaking along with the large scale rotation correction.

What I can do is compile the matlab code to produce a exe file that someone else could run on their computer on video that has the necessary data on the audio channel from the x-io hardware.I've done this and the exe works fine. Of course that just allows others to run it , and not play with the code. Playing with the code would require matlab and the appropriate toolboxes or a translation into true open source code.

So that would allows others to at least a get some processed video.

I will update this list once the hardware development is a bit further along. It is certain doable right now using the original x-io-imu but we should have something better out soon with his newer generation imu.

Here is my latest that I posted on the other thread. This is a combined rotation correction from the imu backpac and a bit of warp stabilizer processing from adobe. you can see the horizon is still sometimes ~ 20 degrees off but will fix that soon I hope.

http://www.youtube.com/watch?v=2mDWMnx9TLM



also some really interesting work on this stuff using on cell phone gyro's:

http://users.ece.utexas.edu/~bevans/pap ... ilization/


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 Post subject: Re: Orientation bacpac for kite or strut mount GoPros
PostPosted: Tue Feb 04, 2014 9:43 pm 
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After seeing the line mount video - I would pay $200 for that!


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 Post subject: Re: Orientation bacpac for kite or strut mount GoPros
PostPosted: Tue Feb 04, 2014 11:04 pm 
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If this thing can come with a 6 degree IMU for $40 including the rest of the quadcopter and the transmitter I would think you could find an affordable solution.

http://www.amazon.com/Estes-4606-Proto- ... B00G924W98

As for processing the video, I imagine it would look fine if all you did was correct rotation instead of accounting for lens issues. That would make it easy to do the fix up and take less than 8 hours.

Great looking demo so far though.


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 Post subject: Re: Orientation bacpac for kite or strut mount GoPros
PostPosted: Fri Mar 07, 2014 6:23 am 
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Well just got back from maui and thought I would try a new trick to make the rotation correction a bit better. When I started this project a few years ago, before I tried the IMU, I tried to do rotation correction based on image processing horizon detection. It didn't work. The horizon wasn't visible much of the time, and even when it was the errors were hard to correct, but with the IMU I know pretty much where it should be so tried a combined approach of 1st using the IMU then an additional step of horizon detection. Turned out a bit better:



Last edited by ptraykovski on Mon Mar 10, 2014 3:01 pm, edited 2 times in total.

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 Post subject: Re: Orientation bacpac for kite or strut mount GoPros
PostPosted: Fri Mar 07, 2014 6:40 am 
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Location: Madison, Wi. Cabrinha, Slingshot, Blade, Axis, Epic, OR, Mystic.
Peter...that's awesome. Well done.

Bob
www.kiteridersllc.com


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 Post subject: Re: Orientation bacpac for kite or strut mount GoPros
PostPosted: Fri Mar 07, 2014 5:18 pm 
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Hey ptraykovski, it's time to get your Kickstarter fund going for this thing. Or just make a handful for the members here to buy. That is the best GoPro line footage I've seen yet.


(I think I'd pursue a patent and sell it Go Pro. They have some deep pockets. It would be cool to see a kiter build this cool gadget in their garage and cash in!)


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