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Patchwork digital watermark encoding and decoding method based on Arnold conversion

A technology of digital watermarking and encoding method, which is applied in image data processing, image data processing, instruments, etc., and can solve the problems of not being able to store more watermark information, the amount of hidden information is small, and the function of tamper detection is not available.

Inactive Publication Date: 2013-12-04
RES INST OF SUN YAT SEN UNIV & SHENZHEN
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Problems solved by technology

[0013] In the Patchwork method listed above, since only 1 bit of information can be hidden, it can only indicate whether there is a watermark in the image, and the amount of hidden information is relatively small, which cannot meet the storage of more watermark information, and does not have the function of tamper detection

Method used

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  • Patchwork digital watermark encoding and decoding method based on Arnold conversion
  • Patchwork digital watermark encoding and decoding method based on Arnold conversion
  • Patchwork digital watermark encoding and decoding method based on Arnold conversion

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Embodiment Construction

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0031] refer to figure 1 , the embodiment of the present invention provides a kind of Patchwork digital watermark coding method based on Arnold transformation, comprises the following steps:

[0032] Step S101: scrambling the original image through Arnold transformation;

[0033] Step S102: performing 8*8 sub-region segmentation on the scrambled image;

[0034]Step S103: Transform the 64 sub-regions sequentially using the Patchwork digital watermarking method, so...

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Abstract

The invention discloses a Patchwork digital watermark encoding method based on Arnold conversion. The method includes the steps: scrambling an original image by the aid of Arnold conversion; dividing the scrambled image into 8*8 sub-regions; sequentially converting 64 sub-regions by a Patchwork digital watermark method to change the original image into a normally displayed carrier image. In order to obtain more storage space, the original image is divided into the 8*8 sub-regions, a watermark is embedded into each sub-region by the Patchwork digital watermark method, and concealable watermark information is increased. In order to add a tampering detection function to the Patchwork digital watermark method, pixel pairs are randomly distributed to regions of the image, more watermark information can be stored, and a certain tampering detection function is achieved. The invention further discloses a Patchwork digital watermark decoding method.

Description

technical field [0001] The invention relates to the technical field of digital watermarking, in particular to a Patchwork digital watermarking encoding and decoding method based on Arnold transformation. Background technique [0002] Digital watermarking technology is a new information hiding technology. The so-called digital watermarking technology is to embed copyright information such as numbers, serial numbers, text, and image symbols into multimedia data to play the role of copyright tracking and copyright protection. In addition, digital watermarking also has important application value in authenticity identification, covert communication, hidden logo, electronic identity authentication and so on. The research of digital watermarking technology involves informatics, cryptography, mathematics, computer science, pattern recognition and other disciplines, which makes hidden information more concealed, safe, and also has symmetry and error correction. The research on dig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
Inventor 刘海亮汪健苏航林格陈湘萍
Owner RES INST OF SUN YAT SEN UNIV & SHENZHEN
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