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Color QR Codes: Increased Capacity Via Per-Channel Data Encoding and Interference Cancellation

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Monochrome 2-D barcodes have recently become extremely popular in mobile imaging applications. To accommodate higher data rates, we present a methodology for extending these barcodes to color. We use independent per channel data encoding in cyan, magenta, and yellow print colorant channels and decode the information in the complementary red, green, and blue channels used in capture, effectively increasing the data rate by a factor of three. To overcome unavoidable inter-channel interference, our framework utilizes adaptive thresholding and model-based interference cancellation at the decoder which are facilitated by an intelligent barcode design that allows estimation of parameters required for thresholding and cancellation. We present the framework by constructing and evaluating the performance for a color version of the QR code, the most commonly deployed monochrome barcode in mobile applications. Experimental results demonstrate that the framework is effective and allows recovery of embedded data with low bit error rates, which can be readily handled by the built in error correction within the QR code standard.
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Document Type: Research Article

Publication date: 2011-01-01

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  • CIC is the premier annual technical gathering for scientists, technologists, and engineers working in the areas of color science and systems, and their application to color imaging. Participants represent disciplines ranging from psychophysics, optical physics, image processing, color science to graphic arts, systems engineering, and hardware and software development. While a broad mix of professional interests is the hallmark of these conferences, the focus is color. CICs traditionally offer two days of short courses followed by three days of technical sessions that include three keynotes, an evening lecture, a vibrant interactive (poster) papers session, and workshops. An endearing symbol of the meeting is the Cactus Award, given each year to the author(s) of the best interactive paper; there are also Best Paper and Best Student Paper awards.

    Please note: for Purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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