Digital watermark method of paralleled multiple robustnesses based on multiple copyright authentications

A digital watermarking and copyright technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of capacity waste, small watermark embedded capacity, small watermark information, etc., and achieve good practicability, good independence, and good detection effect of effect

Inactive Publication Date: 2007-12-26
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0006] (1) Embed the same watermark in different sub-bands, as long as the watermark in any sub-band is detected during detection, the existence of the watermark is judged; the watermark embedded in this method has a small capacity, resulting in waste of capacity, and blind detection cannot be realized;
[0007] (2) Zero watermark information embedding: the original image and the original watermark are loaded together to generate a new watermark, which is essentially the generation of a new watermark without embedding the watermark in the carrier image; it is not very practical and feasible;
[0008] (3) Digital watermarking method based on spread spectrum; this method has good robustness, but due to the addition of spread

Method used

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  • Digital watermark method of paralleled multiple robustnesses based on multiple copyright authentications
  • Digital watermark method of paralleled multiple robustnesses based on multiple copyright authentications
  • Digital watermark method of paralleled multiple robustnesses based on multiple copyright authentications

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0043] A parallel multi-robust digital watermarking method based on multi-copyright authentication mainly includes two parts: parallel embedding and parallel detection. The test image Lena.bmp is selected with a size of 256×256. The watermark information is a binary image.

[0044] Accompanying drawing 3 (a) is the original test image of Lena; Accompanying drawing 3 (b) is the image containing triple watermark; Accompanying drawing 3 (c) is three original binary watermarking images.

[0045] The original image is decomposed by three-level wavelet as shown in Figure 2 (according to the size of the embedded information, the size of the image selects the appropriate number of levels), according to the system block diagram shown in Figure 1, the specific implementation is as follows:

[0046] 1. The original image is subjected to three-level wavelet decomposition ...

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Abstract

A parallel multiple robust digit watermarking-method based on multi-copyright certification includes making Walsh code modulation on copyright information (watermark) of different owner and parallel-embedding modulated watermark into carrier image; detecting demodulation of post watermark information based on relevant parallel blind detection when parallel detection is carried out.

Description

technical field [0001] The present invention relates to the authentication of multiple copyrights. At the same time, the Walsh code in the communication theory is used to ensure the orthogonality between multiple watermark information. The owner realizes the embedding and detection of the watermark in parallel and is independent of each other, which belongs to information security and multimedia signal processing. field. Background technique [0002] Since digital watermarking technology was proposed in 1993, it has been widely concerned at home and abroad. In recent years, with the development of digital communication technology, computer network technology and information compression coding technology, the piracy problem and copyright disputes caused by it have become increasingly serious. Social issues, and digital watermarking technology, as an important branch of information hiding, has achieved outstanding achievements in the protection of intellectual property rights ...

Claims

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Application Information

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IPC IPC(8): G06T1/00
Inventor 费泽松李晓莎匡镜明
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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