HoloWall: designing a finger, hand, body, and object sensitive wall
Proceedings of the 10th annual ACM symposium on User interface software and technology
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Experimental analysis of mode switching techniques in pen-based user interfaces
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Making an impression: force-controlled pen input for handheld devices
CHI '05 Extended Abstracts on Human Factors in Computing Systems
Low-cost multi-touch sensing through frustrated total internal reflection
Proceedings of the 18th annual ACM symposium on User interface software and technology
Zliding: fluid zooming and sliding for high precision parameter manipulation
Proceedings of the 18th annual ACM symposium on User interface software and technology
Precise selection techniques for multi-touch screens
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
reacTIVision: a computer-vision framework for table-based tangible interaction
Proceedings of the 1st international conference on Tangible and embedded interaction
ForceTile: tabletop tangible interface with vision-based force distribution sensing
ACM SIGGRAPH 2008 new tech demos
SLAP widgets: bridging the gap between virtual and physical controls on tabletops
CHI '09 Extended Abstracts on Human Factors in Computing Systems
Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces
The Haptic Tabletop Puck: tactile feedback for interactive tabletops
Proceedings of the ACM International Conference on Interactive Tabletops and Surfaces
Lumino: tangible blocks for tabletop computers based on glass fiber bundles
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Geckos: combining magnets and pressure images to enable new tangible-object design and interaction
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Printed optics: 3D printing of embedded optical elements for interactive devices
Proceedings of the 25th annual ACM symposium on User interface software and technology
Feeling it: the roles of stiffness, deformation range and feedback in the control of deformable ui
Proceedings of the 14th ACM international conference on Multimodal interaction
Understanding touch selection accuracy on flat and hemispherical deformable surfaces
Proceedings of Graphics Interface 2013
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In this paper we present a low cost pressure sensing method for Tangible User Interface (TUI) objects on interactive surfaces, using conventional FTIR and DI tracking. While current TUIs use optical tracking for an object's position and orientation, they rely on mechanical or electric enhancements to enable sensing of other input parameters such as pressure. Our approach uses dedicated marker pads for pressure sensing embedded into an optical marker pattern for position and orientation tracking. Two different marker designs allow different precision levels: Number of Contacts (NoC) allows click sensing and Area of Contact (AoC) enables continuous pressure sensing. We describe the working principles of the marker patterns and the construction of the corresponding tangible objects. We have tested continuous pressure sensing in a preliminary user study and will also discuss limitations of our approach.