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Blob of hand when close to table in front of user

Marios_B_
Beginner
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Hey guys!

I would like to hear your opinion.I want to somehow detect only 1 blob(the blob of the right hand of the user) all the time, but the user is going to make pinch moves close to a table in front of him.That means that hand and part of the table become 1 single blob. and the effects I want my program to have fail.

What would you do?

Any papers/open source solutions that might help?Any easy ones?

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samontab
Valued Contributor II
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There are a few alternatives.

If the sensor and table are not moving you could have a background model in 3D, and ignore it in your blob processing method.

If the sensor or the table also move, then you can try to detect the table as a rigid object and remove it. The hand will be a non-rigid object.

There are other ways of doing this, but will depend on the actual application, constraints, etc...

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Marios_B_
Beginner
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Well, only hand and sensor will be moving...

Regarding detecting table as a rigid object or plane, can I do it using RealSense or do I have to use PCL?Any easier alternatives instead of PCL?

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samontab
Valued Contributor II
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PCL definitely would be my suggestion.

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