Digital watermark embedding method and extracting method for image retrieval and copyright protection

Abstract

The invention discloses a digital watermark embedding method and a digital watermark extracting method for image retrieval and copyright protection. The digital watermark embedding method introduces a digital watermark technology to the process of image retrieval, and a binary digital watermark is embedded into a digital image in a digital image work warehousing link, so that a digital image work is under the copyright protection, and the safety of the digital image work in the process of digital image retrieval is improved; the digital watermark extracting method introduces the digital watermark technology to the process of image retrieval, the embedded binary digital watermark is used as query information during the digital image retrieval, and the extracted binary digital watermark is used as feature information during the digital image retrieval, so that retrieval pertinence is ensured, the establishment of a high-capacity index database is avoided, and a storage space is saved; and the embedded watermark has good robustness, therefore after the digital image work is subjected to the conventional image processing or is under external attack, the embedded watermark can still be effectively extracted, and the accuracy of the image retrieval is ensured.

Description

technical field [0001] The invention relates to a multimedia information retrieval and information security technology, in particular to a digital watermark embedding and extraction method for image retrieval and copyright protection. Background technique [0002] With the rapid development of multimedia technology, computer technology and network technology, various types of digital multimedia information are continuously produced, transmitted and applied. As a kind of multimedia information with rich content and intuitive expression, digital image is the most important and widely used digital media in the multimedia information base. At present, the data of digital images is increasing rapidly at an explosive speed. Obviously, in the face of the massive digital image data generated by the rapid growth, how to effectively organize and manage, and quickly retrieve the image information that meets the needs of users has become a practical problem that needs to be solved urge...

AI Technical Summary

Problems solved by technology

With the rapid increase of the amount of digital image data, it is a big challenge for the storage space; secondly, due to the continuous improvement and development of network technology, the interconnection between systems has become very easy. It facilitates people's acquisition, exchange and sharing of digital image information, but correspondingly, security issues such as copyright and content integrity of digital images have become increasingly prominent

For example, any user can quickly retrieve other people's digital image works through the Internet. If the original digital image is copied, modified and retransmitted without the permission of the author or copyright owner, it will seriously infringe to the author's authorship and the benefit of the copyright owner

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