AirCode: Unobtrusive Physical Tags for Digital Fabrication

@article{Li2017AirCodeUP,
  title={AirCode: Unobtrusive Physical Tags for Digital Fabrication},
  author={Dingzeyu Li and Avinash S. Nair and Shree K. Nayar and Changxi Zheng},
  journal={Proceedings of the 30th Annual ACM Symposium on User Interface Software and Technology},
  year={2017}
}
We present AirCode, a technique that allows the user to tag physically fabricated objects with given information. An AirCode tag consists of a group of carefully designed air pockets placed beneath the object surface. These air pockets are easily produced during the fabrication process of the object, without any additional material or postprocessing. Meanwhile, the air pockets affect only the scattering light transport under the surface, and thus are hard to notice to our naked eyes. But, by… 
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