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Method for embedding robust and reversible watermark

A technology of watermark embedding and robust watermarking, which is applied in image data processing, instrumentation, 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, Guaranteed Robust Effects

Active Publication Date: 2015-07-01
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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  • Method for embedding robust and reversible watermark

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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 embedding a robust and reversible watermark. The method includes: watermark embedding and watermark extraction. The method has the advantages that the features of a robust watermark and a reversible watermark are fully utilized, the robust watermark and the reversible watermark are combined to provide the robust and reversible watermark which can resist JPEG compression attacks, noisy points of images are filtered through low-pass filtering, robustness is solidified, image features are identified through the edge detecting technology, image partitioning is performed, the to-be-embedded block of the robust image is selected by the image texture pixel, obtained by edge detection, of each block, so that the position of embedding selected block after jpeg compression is consistent with the position of the block selected and extracted by the same manner; the watermark is embedded to increase the robustness of the watermark, and the JPEG compression attacks are resisted.

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 Applications(China)
IPC IPC(8): G06T1/00
Inventor 王祥裴庆祺李骁
Owner XIDIAN UNIV
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