Embedding and detecting method and system for image data watermark information

Abstract

The method thereof comprises: a) using low frequency coefficient of discrete cosine transform (DCT) to extract multi feature blocks from the original image data frame; b) embedding watermark information into the middle frequency of DCT domain of said feature blocks; c) according to said multi feature blocks, determining the position of synchronous block; d) embedding synchronous symbol into the synchronous block. The invention can resist geometrical attack.

Description

Technical field [0001] The invention belongs to the field of image processing, and particularly relates to a method and system for embedding and detecting watermark information of image data. Background technique [0002] With the rapid development of computer, multimedia and network technology, image data is extremely rich, and can be easily obtained through the network, so that the image data can be easily copied and modified without any control, resulting in the copyright owner’s Rights and interests cannot be effectively protected. The use of digital watermarking information technology to embed information that is not easily detectable without affecting the product content can achieve the purpose of protecting image data from being copied and modified at will. [0003] At present, most digital watermark information schemes are based on the principle of spread spectrum communication. The embedding terminal modulates the watermark information with a pseudo-random sequence, and ...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a method for embedding image data watermark information, aiming to solve the problems that existing image watermark embedding and detection schemes are less effective in resisting geometric attacks, complicated to implement, poor in real-time performance, and difficult to meet actual application requirements.

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