ITE Transactions on Media Technology and Applications
Online ISSN : 2186-7364
ISSN-L : 2186-7364
Special Section on IDW '18
[Paper] Dynamic PVLC: Pixel-level Visible Light Communication Projector with Interactive Update of Images and Data
Takefumi HirakiShogo FukushimaHiroshi WataseTakeshi Naemura
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2019 Volume 7 Issue 4 Pages 160-168


We previously studied methods leveraging pixel-level visible light communication (PVLC) that embeds imperceptible information for human eyes in each pixel of an image. The PC computation load and amount of data transferred between the PC and projector in previous PVLC systems were excessive because the PC executed both the video and data encoding processes. As a result, it was impossible to achieve both high-dynamic-range images and dynamic updates of the images and data. In this paper, we propose a dynamic PVLC system that offers high video quality and interactively updates the PVLC information through hardware encoding processing. Our system can project a 24-bit gradation color PVLC video that contains 64-bit data at 120 fps by synchronously controlling the ON/OFF states of the DMD and LED light sources at the given performance limit of the projector.

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© 2019 The Institute of Image Information and Television Engineers
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