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Method for realizing random bit non-blind watermark based on chaos

An implementation method, a technology of random bits, applied in the fields of information security, image processing, and computer applications, which can solve the problems of different and unable to extract watermark information.

Inactive Publication Date: 2018-07-03
TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If the embedding process and the extraction process use different keys, different position matrices will be generated, and the extraction process will extract the watermark information at a position different from the embedding position, so the correct watermark information cannot be extracted

Method used

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  • Method for realizing random bit non-blind watermark based on chaos
  • Method for realizing random bit non-blind watermark based on chaos
  • Method for realizing random bit non-blind watermark based on chaos

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Embodiment Construction

[0100] The random bit non-blind watermark is operated on each pixel in the carrier, and the position of the embedded watermark is not fixed. The specific implementation steps are divided into embedding process and extraction process.

[0101] For the convenience of understanding, the watermark here is only embedded in the R channel of the carrier image. In actual processing, the watermark can be embedded in multiple channels, and the method of embedding watermark in other channels is the same as that in R channel.

[0102] 1 Embedding process

[0103] The embedding process calculates the original watermark information with the carrier image and then embeds it into the carrier image.

[0104] (1) Original carrier image processing

[0105] Read in the original carrier image, obtain the size of the image, decompose it into channels, and divide it into R channel, G channel, and B channel.

[0106] For example, there is the original carrier image O, whose size is 4*4, which is ...

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Abstract

The name of the patent of the invention is a method for realizing a random bit non-blind watermark based on chaos, which relates to the technical fields of image processing, computer application and information security. Watermark information is embedded into a carrier image by calculating the embedding positions of different bits through a chaotic system. During embedding, exclusive-OR operationis carried out on the watermark information and the bit value on a specific bit of a binary pixel value in a corresponding position (the coordinates of the pixels are the same) of the carrier image, and the operation result is embedded into the bit participating in operation in the carrier image. During extraction, the values on specific bits with the same binary pixel value in corresponding positions of the watermark-containing carrier image and the original carrier image are extracted, and exclusive-OR operation is carried out on the two values to extract the original watermark information.The method can be widely applied to the fields such as information hiding and copyright protection.

Description

technical field [0001] The patent of the present invention relates to the technical fields of image processing, computer application, information security and the like. Background technique [0002] This system uses chaotic system to generate random sequence. The widely used chaotic system is the Logi stic chaotic system, and its improved form is: [0003] [0004] The system is extremely sensitive to initial values, and a slightly different initial value can give completely different results. According to the characteristics of the chaotic system, a pseudo-random sequence can be generated, and a sequence between [0, 7] can be generated by processing the sequence. [0005] For example, if the initial value of a chaotic system is set to 0.98, a one-dimensional chaotic sequence can be obtained, and the first 16 values ​​of the chaotic sequence a are shown in Table 1. [0006] Table 1 Sequence a [0007] [0008] According to the formula of the chaotic sequence, the s...

Claims

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Application Information

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IPC IPC(8): G06T1/00
CPCG06T1/0021G06T2201/0061G06T2201/0065
Inventor 不公告发明人
Owner TIANJIN UNIV OF TECH & EDUCATION TEACHER DEV CENT OF CHINA VOCATIONAL TRAINING & GUIDANCE
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