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Marker 'sync', then track with gyro/accelerometer

April 9, 2013 - 6:19pm #1

My team has an idea to create an art installation experience with AR.

The idea is that there is a large sculpture in the room, and an AR marker is positioned on one of the sides.

We want to have people 'sync' with the marker when the marker is in view, and allow interactive hotspots of the sculpture to pop up on the screen.

BUT it must continue tracking the sculpture in 3D as the person moves away from the marker by using the gyro, accelerometer, GPS, 3G..... anything really.

I want to know if this is possible? Is there a term for this kind of action so that I can continue researching?

Thanks!

G

Marker 'sync', then track with gyro/accelerometer

November 19, 2013 - 10:42pm #6

Hey redbeef!

Did you manage to resolve the tracking in the end?

If so, how did it turn out? and what did you do to continue tracking without tracking the marker?

Thanks!

Marker 'sync', then track with gyro/accelerometer

April 27, 2013 - 12:46am #5

You can also try UCS which does something similar:

https://developer.vuforia.com/forum/qcar-api/unified-coordinate-system

Marker 'sync', then track with gyro/accelerometer

April 11, 2013 - 8:06am #4

CV = Computer Vision

Vuforia is a vision based AR SDK.

Marker 'sync', then track with gyro/accelerometer

April 9, 2013 - 8:04pm #3

Thanks for the tip! Indeed we're planning to use it indoors, so GPS or 3G could be wildly inaccurate.

What is a CV based approach?

Marker 'sync', then track with gyro/accelerometer

April 9, 2013 - 7:02pm #2

That application might be described as multisensor tracking. The technique of using an image or marker to register a position, and to then extend tracking away from that target is often called off-target tracking. 

But I strongly advise you to evaluate location based tracking before committing to a design or user experience, especially if this is going to be presented indoors or near a building face. GPS and Wifi triangulation are not very precise, especially for registering augmentations on near objects. I've seen good examples of tracking enhancement using intertial sensors and the compass, but these are probably not going to be sufficient in and of themselves. You need a consistent external reference. Ideally you can use multiple ImageTargets. A CV based approach is going to give you the best chance of positioning your hotspots and recognizing the user's position accurately IMO.

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