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Robust combined domain color image zero-watermark embedding and extracting method

A color image and original color image technology, applied in the field of image processing, can solve problems such as ineffective resistance to geometric attacks, poor robustness, etc., and achieve the effect of simple construction process, good robustness, and guaranteed security

Active Publication Date: 2022-04-15
CIVIL AVIATION UNIV OF CHINA
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Problems solved by technology

[0004] The embodiment of the present invention provides a robust combination-domain color image zero-watermark embedding and extraction method to solve the technical problems existing in the prior art that the zero-watermark technology has poor robustness and cannot effectively resist geometric attacks

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  • Robust combined domain color image zero-watermark embedding and extracting method
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  • Robust combined domain color image zero-watermark embedding and extracting method

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

[0029] figure 1 It is a schematic flowchart of the embedding method in the robust combined domain color image zero-watermark embedding and extraction method provided by the embodiment of the present invention; figure 2 It is a schematic flow chart of the extraction method in the robust combined domain color image zero watermark embedding and extraction method provided by the embodiment of the present invention; this embodiment can be applied to the situation where the copyright of the color image is authenticated...

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Abstract

The embodiment of the invention discloses a robust combined domain color image zero-watermark embedding and extracting method, which comprises the following steps of: firstly, carrying out two-dimensional stationary wavelet transform on a brightness component of an original color image in a YIQ color space, and carrying out non-overlapping partitioning on a transformed low-frequency sub-image; and then selecting a certain number of image blocks according to the size of the watermark to carry out all-phase discrete cosine biorthogonal transformation, and finally constructing robust features by using coefficient symbols after block transformation so as to realize zero-watermark embedding. A watermark extraction method is similar to a watermark embedding method, but a watermark needs to carry out rotation discrimination and correction on a to-be-authenticated image in advance. The method has good robustness for resisting various common image processing attacks, such as noise addition, filtering, JPEG compression, zooming and the like, and rotation attacks at any angle.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a method for embedding and extracting a robust zero-watermark of a combined domain color image. Background technique [0002] With the rapid development of technologies such as computer networks and multimedia processing, the dissemination of digital media information (images, audio, video, etc.) has become easier and faster, which also makes the copyright protection of these media information more and more people's attention. As an important branch of information hiding technology, digital watermarking technology can hide specific copyright information in the above digital media, and can still extract copyright information relatively completely after the media information is subjected to malicious attacks, so as to achieve digital media security. Copyright Protection Purposes. [0003] Zero watermarking is a "special" digital watermarking technology. The "embedding" of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00G06T3/60G06T5/10G06T5/20G06T7/90
Inventor 韩绍程王博张鹏周易书赵宏波
Owner CIVIL AVIATION UNIV OF CHINA
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