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Dual-transform color image holographic watermarking method

A color image and double-transform technology, applied in image data processing, image data processing, instruments, etc., can solve problems such as quaternion Fourier transform and wavelet domain holographic watermarking algorithm, etc., to achieve good invisibility, The effect of reducing the amount of embedding and increasing the capacity

Active Publication Date: 2016-04-20
HUNAN UNIV OF TECH
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Problems solved by technology

[0007] Although the above-mentioned patents all involve holographic watermarking algorithms, they do not mention how to combine quaternion Fourier transform and wavelet domain holographic watermarking algorithms, and how to combine quaternion Fourier transform and wavelet domain holographic watermarking algorithms can A better breakthrough has been achieved in balancing watermark robustness and invisibility, so further improvements are still needed

Method used

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Embodiment 1

[0039] As shown in the accompanying drawing, a double-transform color image holographic watermarking method is a color image holographic watermarking algorithm based on quaternion Fourier transform and discrete wavelet transform, using Fourier holographic technology and discrete wavelet transform to make a hologram, The diagonal high-frequency sub-image of the holographic watermark is obtained, and the diagonal high-frequency sub-image of the holographic watermark is embedded into the real part coefficient of the quaternion matrix, and the final watermarked color image is obtained by inverse quaternion Fourier transform.

[0040] Further, the making of hologram using Fourier holographic technology and discrete wavelet transform includes making watermark information into a hologram using Fourier holographic technology, performing a wavelet decomposition on the hologram, and taking the diagonal high-frequency sub-image as the to-be-embedded Anti-counterfeiting information.

[00...

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Abstract

Disclosed is a dual-transform color image holographic watermarking method, which is a color image holographic watermarking algorithm based on a quaternion Fourier transform and a discrete wavelet transform. The method comprises the steps of making a hologram by using the Fourier holographic technology and the discrete wavelet transform, obtaining holographic watermarking diagonal high frequency sub-images, embedding the holographic watermarking diagonal high frequency sub-images into quaternion matrix real part coefficients, performing an inverse quaternion Fourier transform, and obtaining a final color image containing a watermark.

Description

technical field [0001] The present invention relates to a color image holographic watermarking method, in particular to a color image holographic watermarking method based on quaternion Fourier transform and discrete wavelet transform, the color image holographic watermarking method can balance the robustness and invisibility of the watermark A better breakthrough can be widely used in color image processing. It belongs to the technical field of color image anti-counterfeiting printing. Background technique: [0002] Due to the good provability, invisibility and robustness of holographic watermarking technology, holographic watermarking has been well applied in copyright protection. Currently, it is widely used in broadcast monitoring, owner identification, ownership verification, transaction tracking, content Anti-counterfeiting holographic watermark technology has been widely implemented in a wide range of fields such as authenticity identification, copy control, and equi...

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Application Information

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IPC IPC(8): G06T1/00
Inventor 谢勇肖颖喆滑广军谭海湖张雯王凯丽
Owner HUNAN UNIV OF TECH
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