ITE Transactions on Media Technology and Applications
Online ISSN : 2186-7364
ISSN-L : 2186-7364
Special Section on Multi-Modal Integration and Understanding
[Invited Paper] Automatic Sub-pixel Projector Calibration
Supporting Improved Calibration for Projected Environments
Ross T. SmithGuy WebberMaki SugimotoMichael MarnerBruce H. Thomas
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2013 Volume 1 Issue 3 Pages 204-213


This paper presents a new hardware and software calibration technology to improve the process of automatic multiple projector calibration using photo detectors to support Spatial Augmented Reality. This research builds on existing calibration methods that employ point-based photo detectors by advancing the hardware with a larger surface area photo detector to locate sub-pixel position with structured light. This data is used to expand the Gray-coding algorithm with an additional step that improves the measurement. The novel hardware allows a sub-pixel position to be calculated and leveraged to improve alignment of multiple-projector environments. The results show the new approach improves position measurement from pixel accuracy using a point photo detector with Gray-code by an order of magnitude providing sub-pixel accuracy by leveraging the planar photo detector and additional algorithm steps.

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© 2013 The Institute of Image Information and Television Engineers
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