Remote-sensing image digital watermark embedding and extracting method based on quaternary wavelet

A remote sensing image and digital watermarking technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of weak resistance to geometric attacks, lack of phase information in wavelet transform translation sensitivity, etc. Visibility and stability, the effect of enhancing correlation

Inactive Publication Date: 2017-10-24
NANJING NORMAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

However, the digital watermarking method based on the traditional wavelet transform still has many shortcomings, such as the translation sensitivity of the wavelet transform, the lack of phase information and other shortcomings, which makes the method weak in anti-geometric attack

Method used

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  • Remote-sensing image digital watermark embedding and extracting method based on quaternary wavelet
  • Remote-sensing image digital watermark embedding and extracting method based on quaternary wavelet
  • Remote-sensing image digital watermark embedding and extracting method based on quaternary wavelet

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Embodiment 1

[0036] The proposed algorithm is tested and simulated and the results are analyzed. The simulation experiment is carried out in the environment of MATLABR2015b. The original image uses two color remote sensing images, both of which are binary images with a size of 512, the size of the watermark image, and the embedding strength α = 0.02. Through peak signal-to-noise ratio PSNR and normalized correlation coefficient NC, the experimental results were objectively analyzed.

[0037] Such as figure 1 As shown, the watermark embedding process is:

[0038] Step 1: Data preparation before embedding watermark. Read the original color remote sensing image to be watermarked and the grayscale watermarked image to be embedded, such as image 3 As shown, the size of the color remote sensing image is M×M, the size of the watermark image is N×N, and the watermark information is converted into a binary image, denoted as W.

[0039] Step 2: Perform quaternion wavelet transform on the R, G, ...

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Abstract

The invention discloses a remote-sensing image digital watermark embedding and extracting method based on the quaternary wavelet. The embedding process comprises carrying out quaternary wavelet decomposition on R, G and B wave bands of an original color remote-sensing image, making amplitude low frequency coefficients in the three wave bands form a third-order tensor, and then carrying out Tucker decomposition to obtain a core tensor; carrying out Arnold scrambling transformation on an original watermark image; embedding the scrambled watermark information into the core tensor, reconstructing the tensor and carrying out quaternary wavelet inverse transformation, and obtaining a color remote-sensing image including a watermark. The extracting process comprises carrying out quaternary wavelet decomposition on R, G and B wave bands of the color remote-sensing image including the watermark, making amplitude low frequency coefficients in the three wave bands form a third-order tensor, and then carrying out Tucker decomposition to obtain a core tensor; calculating the singular value of the core tensor to extract embedding information; and obtaining watermark information by means of inverse transformation of the Arnold scrambling transformation. According to the invention, invisibility and anti-attack capability of the watermark can be improved.

Description

technical field [0001] The invention belongs to the copyright protection technology of remote sensing images, and in particular relates to a method for embedding and extracting digital watermarks of remote sensing images based on quaternion wavelets. Background technique [0002] Remote sensing image data is one of the country's basic and strategic supporting achievements. It has high scientific research and application value, and is widely used in environmental monitoring, economic development, and urban planning. With the continuous acceleration of the acquisition and application of remote sensing images, the security protection of remote sensing images brought about by the development trend of geographic information system networking and mobility has become increasingly prominent. It is impossible to effectively organize and combat various illegal acts. Therefore, the research on information security of remote sensing images has gradually become a hot spot. [0003] Dig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0021
Inventor 罗文俞肇元胡勇袁林旺王艳楠胡靖瑶闾国年
Owner NANJING NORMAL UNIVERSITY
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