Abstract
In presswork scanning detection for anti-counterfeiting information, distortion or skew may make the image synchronize information lose and the anti-counterfeiting information can’t be extracted. On the research of information hiding with halftone dots shape, a synchronization scheme based on circle detection is proposed in this paper. The image is located by halftone round dots, and the positioning information is detected by the Hough transform. The image is adjusted to achieve the accurate extraction and restoration of the anti-counterfeiting information. Experiments show the algorithm has strong anti geometric attack capability. The research has good application prospect in the field of anti-counterfeiting printing, copyright authentication and products tracking.
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