Image reversible robust data hiding method based on polar harmonic transformation

A technology of polar harmonic transformation and data hiding, which is applied in image data processing, image data processing, image enhancement and other directions, and can solve problems such as distortion

Active Publication Date: 2020-06-05
JINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the defects existing in the prior art, the present invention provides an image reversible robust data hiding method based on hyperharmonic transformation, which solves the distortion problem existing in the process of hyperharmonic transformation.

Method used

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  • Image reversible robust data hiding method based on polar harmonic transformation
  • Image reversible robust data hiding method based on polar harmonic transformation
  • Image reversible robust data hiding method based on polar harmonic transformation

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Embodiment

[0079] like figure 1 As shown, this embodiment provides a method for image reversible robust data hiding based on ultra-harmonic transformation, including: the step of reversible robust data hiding embedding, the step of judging whether the image is attacked, the steps of extracting the watermark and restoring the image when it is not attacked 1. Watermark extraction steps when under attack;

[0080] The specific steps of reversible robust data hiding embedding are as follows:

[0081] S1: Perform polar harmonic forward transformation on the image I to obtain the corresponding polar harmonic transformation moment coefficient;

[0082] S11: Determine the order N and the multiplicity M for polar harmonic forward transformation, in this embodiment, N=5, M=5, use A nm Indicates the polar harmonic transformation moment coefficients of each order, where n and m satisfy the following formula:

[0083] -N≤n≤N

[0084] -M≤m≤M

[0085] S12: Basis H for extreme harmonic transformati...

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Abstract

The invention discloses an image reversible robust data hiding method based on polar harmonic transformation, and the method comprises the following steps: carrying out the polar harmonic positive transformation of an image I, carrying out reversible robust data hiding and embedding, processing the transformation distortion in a polar harmonic positive and negative transformation process, and judging whether the image is attacked or not; when it is judged that the image is not attacked, extracting distortion information from the image through a reversible watermark method, carrying out polar harmonic transformation and quantitative watermark extraction, and then recovering an original image; when it is judged that the image is attacked, carrying out polar harmonic forward transformation and quantitative watermark extraction on the attacked image, and thus obtaining watermark information. According to the method, the distortion problem existing in the polar harmonic transformation process is solved, the characteristics of the polar harmonic transformation torque coefficient are utilized, higher robustness is achieved for geometric attacks and conventional signal processing, and various attacks are effectively resisted.

Description

technical field [0001] The invention relates to the technical field of digital watermarking, in particular to an image reversible robust data hiding method based on extreme harmonic transformation. Background technique [0002] In recent years, various types of digital watermarking algorithms have emerged one after another, which has promoted the development of digital watermarking technology. People realize that there is a lot of redundancy in images. Using image redundancy, watermark extraction and image restoration can be realized. Since the reversible watermarking algorithm cannot The watermark information is extracted after geometric attack or conventional signal processing, which limits the practical application of reversible watermarking technology. Therefore, it is necessary to provide a method to effectively extract watermark information when the image is attacked to a certain extent. Contents of the invention [0003] In order to overcome the defects existing in ...

Claims

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Application Information

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IPC IPC(8): G06T1/00G06T5/00
CPCG06T1/0021G06T5/001G06T2201/0203G06T2201/0065
Inventor 项世军胡润文
Owner JINAN UNIVERSITY
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