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Watermark Embedding and Image Self-Recovery Method Based on Reference Matrix and lsb Replacement

A reference matrix, watermark embedding technology, applied in image data processing, image data processing, instruments and other directions, can solve the problem of watermark imperceptibility deterioration, watermark image quality compromise, etc., to achieve good watermark imperceptibility and ensure security , the effect of high embedding capacity

Active Publication Date: 2022-07-12
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

On the other hand, as the watermark embedding capacity increases, the imperceptibility of the watermark becomes worse, and many existing self-healing schemes cannot achieve the compromise between watermark embedding capacity and watermark image quality

Method used

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  • Watermark Embedding and Image Self-Recovery Method Based on Reference Matrix and lsb Replacement
  • Watermark Embedding and Image Self-Recovery Method Based on Reference Matrix and lsb Replacement
  • Watermark Embedding and Image Self-Recovery Method Based on Reference Matrix and lsb Replacement

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Embodiment Construction

[0066] The present invention is described in further detail below in conjunction with the accompanying drawings and specific embodiments:

[0067] like figure 1 As shown, the present invention proposes a watermark embedding and image self-recovery method based on reference matrix and LSB replacement, including flexibly embedding a watermark in an image by using the reference matrix and LSB method, and detecting and restoring the image by extracting the watermark. The process is mainly divided into the following steps:

[0068] A. Collect the original image in real time, and use the block division method to divide the image into sub-blocks of 4×2 or 2×4 size;

[0069] B. Generate recovery bits, flag bits and authentication bits of the watermark;

[0070] C. Embed the watermark into the original image based on the reference matrix and LSB replacement;

[0071] D. Image tampering detection and self-recovery by extracting watermark.

[0072] The following first introduces seve...

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Abstract

The invention discloses a watermark embedding and image self-recovery method based on reference matrix and LSB replacement, belonging to the technical field of digital watermarking. 4-sized sub-block; generate recovery bits, flag bits and authentication bits of the watermark; embed the watermark into the original image based on the reference matrix and LSB replacement; extract the watermark based on the reference matrix and LSB, recalculate the recovery bits and authentication bits; tamper detection is divided into Two stages, the first stage is based on comparing the extracted authentication bits and the recalculated authentication bits, and the second stage is based on comparing the extracted recovery bits and the recalculated recovery bits; the recovery bits are used to recover the tampered sub-blocks, and finally the recovery is obtained. ; the reference matrix includes a first reference matrix and a second reference matrix. The present invention achieves a balance between the visual quality of the watermarked image, the performance of tampering detection and the visual quality of the restored image.

Description

technical field [0001] The invention belongs to the technical field of digital watermarking, and in particular relates to a watermark embedding and image self-recovery method based on reference matrix and LSB replacement. Background technique [0002] Today, more and more important work is done on the Internet. The integrity and security of data transmission is particularly important. Images, as a kind of data, are vulnerable to malicious or accidental attacks during transmission, such as cut, copy-paste, compression, etc. Therefore, watermarking technology is used for copyright protection. With the in-depth study of images by researchers, some other applications of watermarking have gradually emerged, such as bill anti-counterfeiting, preventing illegal theft, tampering detection and localization, and flexible image restoration. [0003] In most of the existing algorithms, the more watermark information is embedded, the more accurate the detection and localization of the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T1/00H04L9/32
CPCG06T1/0021H04L9/3239H04L2209/608
Inventor 杨红梅王彤颜斌王梦溪潘正祥刘涛
Owner SHANDONG UNIV OF SCI & TECH
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