Tracing the Source of Printed Documents with Edge-Refined Stegatones
Abstract:A system for tracking and tracing secure documents is described by embedding print job data on each page in a steganographic halftone, preserving the aesthetics of the page. The system demonstrates the ability to transmit job tracking data with perfect accuracy using data hidden in a high-quality rendering of a graphics object. This work addresses two key issues: (1) control of halftoning edge eflects for graphic objects like logos, and (2) compensation for non-afline warping efiects induced by the print-scan process. The solution eliminates noisy edges without sacrificing data-carrying capacity in natural images, while providing automated alignment and robust recovery with the use of error correction codes.
Document Type: Research Article
Publication date: January 1, 2011
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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