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

A technology for authentication watermarking and authentication methods, applied in image data processing, instruments, image data processing, etc., can solve the problems of authentication failure, inability to resist lossy compression of digital images, and dependence on image compression formats.

Inactive Publication Date: 2007-10-24
刘瑞祯 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 auth

Method used

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

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Embodiment Construction

[0059] Below in conjunction with accompanying drawing, the present invention will be further described

[0060] Figure 1 is a schematic diagram of the embedding process of the authentication method watermark. This process mainly involves two processes, namely, the calculation process of the digital fingerprint and the embedding process of the digital fingerprint. The specific implementation process is as follows: first divide the input digital image into blocks, calculate the digital fingerprint of the image, generate the authentication watermark sequence, and then embed the information of the authentication watermark into the image block to generate the digital image with the authentication watermark.

[0061] Fig. 2 shows the calculation process of the digital fingerprint in the embedding process of the authentication method watermark mentioned above. The specific implementation process includes: 1. Calculate the mean value of each image block; 2. Quantize the mean value ac...

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PUM

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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...

Claims

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Application Information

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IPC IPC(8): G06T1/00
Inventor 魏育成刘瑞祯
Owner 刘瑞祯
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