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BullsEye: High-Precision Fiducial Tracking for Table-based Tangible Interaction

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This paper proposes a series of techniques for improving the precision of optical fiducial tracking on tangible tabletops. The motivation is to enable convincing interactive projection mapping on tangibles on the table, which requires a high precision tracking of the location of tangibles. We propose a new fiducial design optimized for GPU based tracking, a technique for calibrating light that allows for computation on a greyscale image rather than a binarized black and white image, an automated technique for compensating for optical distortions in the camera lenses, and a tracking algorithm implemented primarily in shaders on the GPU. The techniques are realized in the BullsEye computer vision software. We demonstrate experimentally that BullsEye provides sub-pixel accuracy down to a tenth of a pixel, which is a significant improvement compared to the commonly used reacTIVision software.
TitelProceedings of the Ninth ACM International Conference on Interactive Tabletops and Surfaces, ITS '14
RedaktørerRaimund Dachselt, Nicholas Graham, Kasper Hornbæk, Miguel Nacenta
Antal sider10
ForlagAssociation for Computing Machinery
Sider 269-278
ISBN (trykt)978-1-4503-2587-5
StatusUdgivet - 2014
BegivenhedInternational Conference on Interactive Tabletops and Surfaces - Dresden, Tyskland
Varighed: 16 nov. 201419 nov. 2014


KonferenceInternational Conference on Interactive Tabletops and Surfaces

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