Method for adding and recognizing watermark to document in printing process

Abstract

The invention provides a method for adding and recognizing a watermark to a document in the printing process. The method for adding and recognizing a watermark to a document in the printing process comprises the following steps: S1, receiving the data ransferred from an office software: the printing system receives the data ransferred from the office software; S2, adding a watermark: the printing system adds the watermark to the data transferred from the office software combining with the binarized watermark information, and completes the printing work; S3, recognizing the watermark: combining the matrix obtained from a paper watermark document scanning piece with the matrix obtained according to the data transferred from the office software, and integrating an intermediate transformation matrix, and restoring the watermark information according to the intermediate transformation matrix and the hash matrix of watermark adding. The invention provides the method for adding and recognizing a watermark to a document in the printing process, and according to the invention, the watermark information is binarized, therefore, the added watermark information is knowable and difficult to read, has a strong anti-interference ability, and has the functions of protecting the enterprise information and the copyright of the document more effectively, etc..

Description

technical field [0001] The invention relates to the technical field of computer data security, in particular to a method for adding watermarks and identifying watermarks to documents during printing. Background technique [0002] In today's information age, digital information media has been applied to all walks of life. It improves the efficiency of functions such as data access, document printing, and electronic office, but the accompanying information security issues are also increasing day by day. Without the permission of the file owner, some individuals or groups arbitrarily copy and disseminate the company's confidential documents, which has caused huge economic losses to the company. For the benefit of the company, copyright protection for corporate documents is particularly important. Digital watermarking technology is a digital product copyright protection technology that has emerged in recent years. It can carry copyright information and authentication informati...

AI Technical Summary

Problems solved by technology

[0014] In order to solve the disadvantages of low watermark information efficiency in the existing manual adding method, strong readability of watermark added information, and relatively fixed content of watermark added by a printer, the present invention provides a method for adding watermarks and adding watermarks to documents during printing. The method for watermark identification comprises the following steps:

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