Seal embedded information processing method, digital watermark extraction method and seal processing system

A technology of embedding information and processing methods, applied in image data processing, image data processing, instruments, etc., can solve the problems of limited legal effect and inability to separate the benefits of electronic seals, and achieve the effect of reducing the risk of fraudulent use

Pending Publication Date: 2020-10-16
江苏诚印科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the benefits of electronic seals cannot be separated from electronic documents. If an electronic document with an electronic seal is printed on a paper medium through an ordinary printer, its legal effect is equivalent to a copy of the original; When electronic documents are printed on paper media, their legal effect is limited to the system

Method used

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  • Seal embedded information processing method, digital watermark extraction method and seal processing system
  • Seal embedded information processing method, digital watermark extraction method and seal processing system
  • Seal embedded information processing method, digital watermark extraction method and seal processing system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] A processing method for seal embedding information, including a generation method and an authentication method, the steps of the generation method include:

[0053] Enter the seal and enter the information to be embedded;

[0054] Embedding the information into the stamp image of the stamp to generate a stamp image containing the embedding code;

[0055] The authentication methods described include:

[0056] Capture stamp images containing embedded codes;

[0057] The seal image containing the embedded code is positioned for authentication, and the embedded information is fed back.

[0058] In this embodiment, the hidden information includes but not limited to the identity information of the seal.

[0059] Further, generating the seal image comprising the embedding code in the seal image embedded in the seal after the information encoding includes seal extraction, positioning and hidden information encoding; wherein,

[0060] Seal text extraction and positioning: ex...

Embodiment 2

[0094] A digital watermark extraction method, which is used to extract the digital watermark in the processing method of the seal embedding information in the first embodiment, the steps of the method include:

[0095] Remove the ring coding area and keep the inner text part;

[0096] Scramble the stamp image containing the watermark according to the scrambling key, and calculate the eigenvalue matrix of the image, that is, the number of black pixel values ​​corresponding to the block;

[0097] Perform discrete cosine transform DCT on the eigenvalue matrix to obtain the DCT coefficients embedded in the watermark stamp image, and traverse the coefficients at the corresponding positions when embedding; judge the 0, 1 information of the watermark according to the positive and negative values ​​of the coefficients, and obtain the watermark sequence.

[0098] After extraction, the correct extraction rate of the digital watermark sequence is calculated, that is, the ratio of the cor...

Embodiment 3

[0100] A stamp processing system comprising:

[0101] a client terminal adapted to input stamps and input hidden information;

[0102] A server adapted to embed hidden information into a stamp image of the stamp to generate a stamp image containing hidden information.

[0103] Specifically, the stamp processing system is used to implement the stamp embedding information processing method in Embodiment 1; wherein,

[0104] Described client end is also suitable for collecting a certain stamp embedding code to be tested;

[0105] The server is also adapted to decode the hidden information from the stamp embedded code.

[0106] The embedding and extraction of digital watermark can be realized in the server.

[0107] Specifically, during the generation process of the seal embedding code, the user selects the required seal and inputs the corresponding file information, and after the server receives the user's request, an identity information is automatically generated for the sea...

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Abstract

The invention discloses a seal embedded information processing method which comprises a generation method and an authentication method, and the generation method comprises the following steps: inputting a seal and inputting information to be embedded; encoding the information, and embedding the encoded information into the seal image of the seal to generate a seal image containing the embedded code; the authentication method comprises the following steps: acquiring a seal image containing an embedded code; and positioning and authenticating the seal image containing the embedded code, and feeding back embedded information. Information can be attached to a seal image, the problem that an electronic seal loses efficacy after being printed is solved, the information can comprise identity information, and each printed electronic seal can still trace back the identity information of the printed electronic seal.

Description

technical field [0001] The invention relates to a processing method for seal embedding information, a digital watermark extraction method and a seal processing system. Background technique [0002] Currently, generally, seals are divided into two categories: physical seals and electronic seals. Physical seals exist in physical form and are usually used to seal traditional paper documents, while electronic seals are stamped on electronic documents and are usually used for authentication between electronic documents. Based on digital signature technology, it is anti-counterfeiting and anti-counterfeiting, with high security , It can effectively protect and securely encrypt the information transmission on the enterprise network. [0003] However, the benefits of electronic seals cannot be separated from electronic documents. If an electronic document with an electronic seal is printed on a paper medium through an ordinary printer, its legal effect is equivalent to a copy of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T1/00
CPCG06T1/0021G06T2201/0065
Inventor 潘敏灵吴解民王义康蔡旖旎
Owner 江苏诚印科技有限公司
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