@inproceedings{9cea204504a94f56b407ef9b5f22c688,
title = "Stacks on the surface: Resolving physical order using fiducial markers with structured transparency",
abstract = "We present a method for identifying the order of stacked items on interactive surfaces. This is achieved using conventional, passive fiducial markers, which in addition to reflective regions, also incorporate structured areas of transparency. This allows particular orderings to appear as unique marker patterns. We discuss how such markers are encoded and fabricated, and include relevant mathematics. To motivate our approach, we comment on various scenarios where stacking could be especially useful. We conclude with details from our proof-of-concept implementation, built on Microsoft Surface.",
keywords = "Computer vision, Direct manipulation, Fiducial markers, Input, Interaction, Physical, Physical state, Piles, Stacking, Tangible, Vertical ordering",
author = "Tom Bartindale and Chris Harrison",
year = "2009",
doi = "10.1145/1731903.1731916",
language = "English",
isbn = "9781605587332",
series = "ITS 2009 - The ACM International Conference on Interactive Tabletops and Surfaces, Proceedings",
pages = "57--60",
booktitle = "ITS 2009 - The ACM International Conference on Interactive Tabletops and Surfaces, Proceedings",
note = "4th ACM International Conference on Interactive Tabletops and Surfaces, ITS 2009 ; Conference date: 23-11-2009 Through 25-11-2009",
}