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An anti-counterfeiting method for digital printed matter based on digital watermarking technology

A technology for digital watermarking and printing, applied in image data processing, image data processing, instruments, etc., can solve problems such as noise interference, achieve the effect of improving robustness and reducing the amount of calculation

Inactive Publication Date: 2016-05-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of noise interference and geometric transformation in digital prints, the present invention selects a quantization index modulation method with good robustness to noise interference for watermark embedding

Method used

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  • An anti-counterfeiting method for digital printed matter based on digital watermarking technology
  • An anti-counterfeiting method for digital printed matter based on digital watermarking technology
  • An anti-counterfeiting method for digital printed matter based on digital watermarking technology

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Embodiment Construction

[0032] Aiming at the two transformations existing in the printing and scanning process, the present invention selects the method of quantization index modulation with good robustness to noise interference when embedding, and registers the image to be detected at the detection end to solve the geometric transformation problem. The asynchronous problem that comes, the detection result obtained is then statistically judged, and the goal of completely and correctly extracting the watermark information is achieved. The specific implementation steps are as follows:

[0033] 1. Processing of original digital images:

[0034] 1) On the original digital image, select several feature points (four corner points are selected in this embodiment) to record their coordinates, and use the obtained coordinates and image size as the key;

[0035] 2) Generate digital watermark: such as Figure 4 As shown in a, the watermark in this embodiment takes a number as an example, and the number is for...

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Abstract

The invention provides an anti-fake method for digital print. The method includes the steps of: a) at a built-in end, processing carrier images, fixing special corners and coordinates thereof, then generating a binary form of digital watermark information, and using quantization index modulation for watermark embedding; b) at a detecting end, transforming images such as registration and interpolation, then detecting to acquire information, and processing the information for statistical decision. The anti-fake method for digital print is capable of resisting noise and geometric transformations of print, and being widely used in the printing field.

Description

technical field [0001] The invention relates to an anti-counterfeiting method for digital printed matter based on digital watermark technology, and belongs to the technical field of multimedia signal processing. Background technique [0002] Digital watermarking technology is to embed some identification information (that is, digital watermark) into digital carriers (including multimedia, documents, software, etc.) in a hidden way, through which the information hidden in the carrier can achieve the purpose of copyright protection and tamper prevention. With the emergence and development of printers and scanners, the reproduction of images has become very easy, which has brought challenges to the copyright protection of printed matter. The invisibility and robustness of digital watermark technology provide an effective scheme for copyright protection of printed matter. [0003] Two types of attacks, noise superposition and geometric transformation, are commonly introduced du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/16G06T1/00
Inventor 刘琚田敏万文博王锋冯峰
Owner SHANDONG UNIV
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