Embed and detection method for identifying water mark, its system and uses

Abstract

The invention discloses an embedded and check method of identification watermark, a relative system and application, wherein the embedded method comprises the calculation of digit fingerprint and the embed process of the digit fingerprint, which uses a digit fingerprint based on quantized average value to generate an identification watermark sequence, and embed the information of the watermark into an image block to generate a digit image with the identification watermark. And the check method comprises integrality check and distortion positioning, which extracts the information of the identification watermark to separate the digit fingerprint and the binary random sequence, check the data to realize the integrality check and distortion positioning. The invention has the advantages that the invention can process distortion positioning accurately on damaged compressed digit image, with high operation speed and all process in time domain, high safety for resisting impact, vector image, combine impact and test impact or the like.

Description

Technical field: [0001] The invention relates to computer digital image processing and recognition, in particular to a digital fingerprint-based authentication watermark embedding and detection method and its system and application. Background technique: [0002] The development of computer technology and the popularization of the Internet have enabled digital images, documents, documents or files to be widely used in many important businesses of e-commerce and e-government affairs, such as the bill retention business of banks [1], and the value-added tax invoices of taxation departments. certification business [2], electronic archives business [3] of the archives management department, and so on. In these applications, paper bank checks, value-added tax invoices, documents, and books are scanned or photographed and converted into digital images, thereby realizing the replacement function of paper in business processes. Digital images have a series of advantages such as fas...

AI Technical Summary

Problems solved by technology

These methods can achieve a certain degree of digital image authentication and tampering positioning, but they are not resistant to lossy compression of digital images. fail

Therefore, some methods try to find some frequency features corresponding to JPEG compression, and add authentication watermark information to these features, so as to realize a fragile watermark that can resist JPEG compression [Reference 9]. The disadvantage of this type of method is the large amount of calculation , and the comparison depends on the specific image compression format

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