Reversible double-watermark scheme suitable for color image

A color image and watermarking technology, applied in image watermarking, image data processing, image data processing and other directions, can solve problems such as single function of watermarking scheme, poor robustness of reversible scheme, and image distortion.

Pending Publication Date: 2021-12-07
HAINAN UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the watermarking scheme has a single function, it will cause distortion to the image, and th

Method used

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  • Reversible double-watermark scheme suitable for color image
  • Reversible double-watermark scheme suitable for color image
  • Reversible double-watermark scheme suitable for color image

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Embodiment Construction

[0019] The present invention will be described below in conjunction with the accompanying drawings.

[0020] The present invention proposes a reversible double watermarking scheme suitable for color images. The scheme has robustness, can resist common robust attacks and has the effect of copyright protection; the fragile watermark can be used for tampering detection and positioning. The fully reversible watermarking scheme can be applied to scenes requiring high image quality, such as medical treatment and remote sensing.

[0021] Divide the host image into three layers of R, G, and B. After the robust watermark image is scrambled, the embedding position map is generated by pre-embedding to determine the embedding position. According to the embedding position map, integer wavelet transform and differential histogram translation are used to embed robust watermark. After embedding the robust watermark, use the embedded R' and G' layer blocks to generate a hash sequence, and the...

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Abstract

The invention relates to a reversible double-watermark scheme suitable for a color image. The reversible double-watermark scheme comprises the processes of embedding of a robust watermark, extraction of the robust watermark, embedding of a fragile watermark, extraction of the fragile watermark and image recovery. The robust watermark embedding process comprises the steps of generating an embedding position map by using a pre-embedding method, increasing robustness by using integer wavelet transform, and embedding a robust watermark by using a differential histogram translation method; the robust watermark extraction clock comprises the step of extracting the watermark by using inverse integer wavelet transform and differential histogram translation; when the fragile watermark is embedded, a hash sequence is used for generating the fragile watermark, and the fragile watermark is embedded in a block prediction error expansion mode; and hash sequences are compared during fragile watermark extraction, if the Hash sequences are consistent, watermark image recovery is carried out, and if the Hash sequences are not consistent, a tampering detection positioning image is generated, and a tampering position is positioned.

Description

technical field [0001] The invention belongs to the field of image digital watermarking and relates to a color image reversible double watermarking scheme. Background technique [0002] The development of Internet technology has enabled digital multimedia to be disseminated to everyone in real time through the Internet. Digital media and traditional media complement each other and profoundly affect people's lives. In the digital world, even non-professional users have access to many tools for working with digital images. Due to the variety of means of copyright destruction, the process of rights protection is often complicated. The reason for this is that the copyright owner did not take effective measures to prevent infringement in advance. Digital watermarking has been recognized as an effective method to ensure the authenticity and integrity of images. [0003] At present, watermarking technology can be divided into zero watermarking, reversible watermarking and irrev...

Claims

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Application Information

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IPC IPC(8): G06T1/00G06F21/16
CPCG06T1/0085G06T1/005G06F21/16G06T2201/0051G06T2201/0052
Inventor 周晓谊段韶华钱宇晗
Owner HAINAN UNIVERSITY
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