Image watermark embedding method and extraction method, and related methods

An image watermarking and watermarking technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of image visual quality impact, poor ability to resist image processing attacks, embedded template point analysis, etc.

An image watermarking and watermarking technology, applied in image data processing, image data processing, instruments, etc., can solve the problems of image visual quality impact, poor ability to resist image processing attacks, embedded template point analysis, etc.

CN106097237AActive Publication Date: 2016-11-09INST OF AUTOMATION CHINESE ACAD OF SCI
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  • Image watermark embedding method and extraction method, and related methods
  • Image watermark embedding method and extraction method, and related methods
  • Image watermark embedding method and extraction method, and related methods

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Embodiment Construction

[0055] The technical problems solved by the embodiments of the present invention, the technical solutions adopted and the technical effects achieved are clearly and completely described below in conjunction with the accompanying drawings and specific embodiments. Apparently, the described embodiments are only some of the embodiments of the present application, not all of them. Based on the embodiments in the present application, all other equivalent or obviously modified embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention. Embodiments of the invention can be embodied in many different ways as defined and covered by the claims.

[0056] It should be noted that, in the following description, many specific details are given for the convenience of understanding. It may be evident, however, that the present invention may be practiced without these specific details.

[0057] It should be noted that, in...

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Abstract

The present invention discloses an image watermark embedding method, an image watermark extraction method, a digital media copyright protection method and a digital media copyright tracing method. The image watermark embedding method comprises: converting a watermark into a watermark binary sequence as required; carrying out a key-based spread spectrum operation on the watermark binary sequence, so as to determine a spread spectrum watermark vector; carrying out adaptive segmentation on a to-be-watermarked image; based on the adaptive segmentation, carrying out multistage discrete cosine transform on the to-be-watermarked image, so as to determine a first transform coefficient matrix; based on the first transform coefficient matrix, constructing a feature vector, and embedding the spread spectrum watermark vector into the feature vector; and carrying out coefficient reset, inverse discrete cosine transform of the coefficient matrix, and the like on the feature vector embedded with the spread spectrum watermark vector, so as to determine the watermarked image. According to the methods disclosed by the embodiments of the present invention, invisibility, robustness and security of the watermark are improved, and risk that the watermark is recognized and erased maliciously is weakened.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of digital media copyright protection, in particular to an image watermark embedding method, an image watermark extraction method, a digital media copyright protection method, and a digital media copyright tracking method. Background technique [0002] In recent years, with the rapid development of Internet technology and digital media technology, there are a large number of digital media content resources (such as text, images, audio and video, etc.) Media content is copied, modified, disseminated and used. Therefore, the copyright protection of digital media content has attracted more and more attention from academic and commercial circles. In the process of solving this problem, adding watermark to digital media content is a widely used technical means. Digital watermarking technology is to embed the identifier representing its copyright information into the digital media conten...

Claims

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Application Information

Patent Timeline
09 Nov 2016
Publication
CN106097237A
IPC
G06T1/00
CPC
G06T1/0092
Inventors
关虎; 张桂煊