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Three years ago a similar question was asked, but i think that enough time has passed to make the answers obsolete.

The question is simple, is there a way to do markerless tracking using ARToolKit or other free libraries in the android framework? If there exists a free framework that can do this please, put a reference to the resource.

I have searched a lot, but everything i could find is not given for free, like Vuforia.

What i managed to do until now is to build an opencv app that allows the user to take a pic of the chosen marker, and then OpenGL stuff is rendered on top of the tracked marker. Unfortunately the camera intrinsics is required, and on top of that i have problems related to the tracking, which is quite unstable. For this reasons i am searching some other framework such as ARToolKit, but i couldnt find any reference to markerless tracking.

Thanks in advance

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deight
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ARToolKit is a marker based AR library (and so is vuforia). I think you're mixing concepts and you want to use an image as marker (which is still a marker)

In that case the answer is yes, you can use ARToolKit. They are called NFT -natural feature trackers-.

shalafi
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  • Vuforia now claims to support markerless tracking in its latest version. However, I haven't tested it yet. I'm not sure how well it works. I assume it has some higher hardware requirements. – Stephan Branczyk Oct 28 '15 at 06:51
  • I may have missed that announcement. Will check out out, thanks. – shalafi Oct 28 '15 at 06:52
  • I think they call it 3D object tracking. I assume that's what he meant by markerless tracking. – Stephan Branczyk Oct 28 '15 at 07:03
  • Thank you shalafi, you were right when u said that i was confused. I re-read the artoolkit documentation finding out [what are and how to use NFT](http://artoolkit.org/documentation/doku.php?id=3_Marker_Training:marker_nft_training). – deight Oct 28 '15 at 07:19