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Mobile Capture of High-Resolution Data-Bearing Markings

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Recent developments in data-bearing print include a number of technologies that enable high-capacity encoding of data via manipulation of high-resolution printed structure (halftones). While it has been shown that data encoded with these methods can be decoded from scanned images, there are challenges associated with achieving the same type of functionality on a mobile imaging device. The image must be captured at a distance that can resolve the required detail. At the same time, it is necessary to locate the desired region of interest quickly, and to determine if the region is in focus. Due to the designs of several common mobile phone APIs, in some applications it is necessary to achieve this result using frames captured at video rate/quality, and without direct control of an imaging device's focus system. Nonetheless, the proposed approach is capable of extracting information embedded in the halftone structure of 600 dpi prints with a mobile device.

Document Type: Research Article

Publication date: January 1, 2012

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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