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A Method of Robust Reversible Watermark Embedding

A technology of watermark embedding and robust watermarking, which is applied in the fields of instruments, computing, image data processing, etc., can solve the problems of poor robustness of reversible watermarking and no resistance to JPEG compression, etc., to achieve consolidating robustness, improving efficiency, and ensuring robustness sticky effect

Active Publication Date: 2018-07-27
XIDIAN UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for embedding a robust reversible watermark, aiming to solve the problem that the existing reversible watermark has poor robustness and does not have good resistance to JPEG compression

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  • A Method of Robust Reversible Watermark Embedding

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Embodiment Construction

[0055] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0056] The application principle of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0057] Such as figure 1 As shown, the robust reversible watermark embedding method of the embodiment of the present invention includes the following steps:

[0058]S101: Perform jpeg compression on the IW to obtain the picture IW_comped;

[0059] S102: Process the IW_comped low-pass filter to obtain the picture I1';

[0060] S103: Perform edge processing on I1' to obtain picture I2';

[0061] S104: Divide I2' into blocks (each block is 64*64 in size);

[006...

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Abstract

The invention discloses a method for robust and reversible watermark embedding, including: watermark embedding and watermark extraction; fully utilizing the characteristics of robust watermark and reversible watermark, and combining the two, a robust reversible watermark which can resist JPEG compression attack is proposed , through low-pass filtering, the noise on the picture is filtered out, and the robustness is consolidated. The edge detection technology identifies the picture features, and then divides the picture into blocks. To select the block to be embedded in the robust watermark, after the selected block is compressed by jpeg, when the extracted block is selected in the same way, it is consistent with the position of the previously embedded selected block; the watermark is embedded to increase the robustness of the watermark, Resists JPEG compression attacks.

Description

technical field [0001] The invention belongs to the technical field of watermark embedding, in particular to a robust and reversible watermark embedding method. Background technique [0002] In recent years, in the fields of military, medical, remote sensing image processing and other fields, scholars have analyzed and studied the original image, and proposed a reversible watermarking technology by adjusting the information of the human eye to the insensitive area in the image. After extracting the watermark, the original image can be restored without error. However, in the actual application process, in order to save and transmit images conveniently, we often need to compress the images (such as JPEG compression currently commonly used). Traditional reversible watermarks are not robust, that is, they cannot resist JPEG compression attacks. After compression, not only the original picture cannot be restored, but also the watermark cannot be extracted. Contents of the inv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/16G06T1/00
Inventor 王祥裴庆祺李骁
Owner XIDIAN UNIV
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