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A Robust Large-capacity Digital Watermarking Method Based on Marker Code

A digital watermarking and marking code technology, applied in the field of information security, can solve the problem of insufficient ability to resist geometric desynchronization attacks, achieve the effect of achieving robustness and watermarking capacity, good balance, and improving robustness

Active Publication Date: 2020-12-29
江苏新视云科技股份有限公司
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Problems solved by technology

[0006] Purpose of the invention: In order to solve the problem of insufficient ability to resist geometric desynchronization attacks in the prior art, the present invention provides a robust large-capacity digital watermarking method based on marker codes

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  • A Robust Large-capacity Digital Watermarking Method Based on Marker Code
  • A Robust Large-capacity Digital Watermarking Method Based on Marker Code
  • A Robust Large-capacity Digital Watermarking Method Based on Marker Code

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Embodiment Construction

[0041] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention.

[0042] This embodiment provides a robust large-capacity digital watermarking method based on marker codes, the method includes an embedding stage and an extraction stage;

[0043] Watermark embedding: In this embodiment, the watermark information and the mark code are converted into a binary image, and then the bit information of the binary image is embedded in the corresponding DCT block, such as figure 1 As shown, the specific steps are as follows:

[0044] Step 1: Carrier image preprocessing: scale the carrier image to a fixed size a×b,

[0045] Step 2: Extract the Y channel in the carrier image: convert the color space into YCrCb space, separate the three...

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Abstract

The present invention disclosed a large -capacity digital watermark method based on the label -based robust code, which is mainly divided into two parts: watermark embedding and extraction; the embedded process is: 1) the carrier image pre -processing; 2) the Y channel in the carrier image; 3) Add labels to the watermark image and convert it into a dual -value sequence; 4) divide the carrier image block and make DCT transformations of each image block; 5) Modify the embedded DCT coefficient; 6) Do DCT for the image block to DCTReverse transformation, and merge three color channels to generate water -containing images; the extraction process is: 1) to detect the image pre -processing; 2) extract the Y channel in the image to be detected;The latter image is divided into blocks, and DCT transformations are made for each block; 5) Extract watermark information from blocks.The present invention not only can better resist common watermark attacks, but also has a high hidden capacity.

Description

technical field [0001] The invention belongs to the field of information security. Background technique [0002] Thanks to the rapid and widespread development of network technologies, digital information can be distributed with no loss of quality, low cost and instant delivery. The protection of multimedia content has become an important topic in recent years due to the lack of awareness of intellectual property among consumers. When people publish software, text files, and multimedia works through the Internet, they hope to effectively protect the copyright of their works and prevent others from illegally copying, disseminating, and tampering with information. Therefore, digital watermarking technology emerges at the historic moment. Digital watermark technology is a technology that inserts watermark information into its original digital content without hindering users from using it. [0003] In recent years, academia has proposed many digital watermarking methods. The...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00G06T3/40G06T7/90G06K9/62
CPCG06T1/0021G06T3/4084G06T1/005G06T7/90G06F18/22
Inventor 周志立苏曰成朱剑宇孙星明
Owner 江苏新视云科技股份有限公司
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