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, in particular to a method and system for embedding and detecting image data watermark information. Background technique [0002] With the rapid development of computer, multimedia and network technology, the image data is extremely rich, and can be easily obtained through the network, so that the image data can be easily copied and changed without any control, resulting in copyright owner's Rights and interests are not effectively protected. Using digital watermark information technology to embed imperceptible information without affecting the product content can achieve the purpose of protecting image data from random copying and modification. [0003] At present, most digital watermark information schemes are based on the principle of spread spectrum communication. The embedding end modulates the watermark information with a pseudo-random sequence, and then adds it to the image data with a cert...

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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