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Author Topic: Tracking ID of blobs?  (Read 397 times)
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« on: March 09, 2009, 04:06:04 AM »

We are making a project where we want to do inverse 3d-projection to find the absolute position and rotation of an object in a room.
The object is supposed to have IR-diodes mounted in a specific pattern and we use the wiimote placed in the room to find these points in 2d and then do an inverse 3d-projection to get the location of the object.

We have complete software to do this...if the id of each point is known.

Therefore my question is, how well does the wiimote remember the id of the blobs?

If i light up the diodes in a specific order, will the wiimote keep track of this order?
What happens if one diode goes out of view for a short period, when it comes back will it have the same id as before?
If i pulse the diodes, to only track one at a time, is there any delay from when i shut it down or light it up until the wiimote forgets/finds it? High speed isn't really necessary, we might need the position ~5times/sec.
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« Reply #1 on: November 13, 2009, 06:25:54 AM »

your tonic is long time ago but i ask the same question. How to keep the 1,2,3,4 dots in good order?
I think about the sequencing of dots like this: 5 steps . Switch IR leds on/off like this :
1 0 0 0 ,1 1 0 0 ,1 1 1 0 , 1 1 1 1, 0 0 0 0.

I don't know the interval between the steps.

Someone can tell us what the best way.

for more than 4 points, maybe needed to synchronise the sequence with computer. (computer control the sequence and then you can separate the dots by packs. 1,2,3,4 for this and 5,6,7,8 for that).
Bye
Thanks.
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