Document watermark hiding and extracting method and device based on line spacing RGB value

Abstract

The invention provides a document watermark hiding and extracting method and device based on a line spacing RGB value, and the method comprises the steps: firstly converting watermark information into a bit stream, reading an original document to be embedded with the watermark information, obtaining the total page number and the total line number of the original document, selecting a plurality of modification lines in each page of the original document, and according to the RGB value of the line spacing adjacent to the modification lines, carrying out the watermark hiding and extracting according to the RGB value of the line spacing adjacent to the modification lines. And respectively determining bits occupied by the blue component, the green component and the red component, and embedding bit streams into the bits of the blue component, the green component and the red component in sequence based on the arrangement sequence of bit values in the bit streams to obtain the protection document embedded with the watermark information. According to the technical scheme, the watermark information is embedded into the to-be-protected document in the form of the line spacing RGB value, due to the fact that human eyes are not sensitive to slight change of colors, the watermark information hiding effect is good, change information is difficult to obtain when an original document does not exist, the watermark information is prevented from being tampered or deleted, and then the technical effect of protecting the copyright of document resources is achieved.

Description

technical field [0001] The present application relates to the field of information security technology, and in particular to a method and device for hiding and extracting document watermarks based on RGB values ​​of line spacing. Background technique [0002] With the rapid development of digital technology and network, the exchange of multimedia information has reached unprecedented depth and breadth. People can publish their works through the vast Internet. The popularization of network technology has also expanded people's old learning mode. At present, many units will issue some corresponding norms, reports and other documents, and most of these documents are compiled by senior experts of some units. The convenient network transmission, downloading and copying technology has laid the foundation for the dissemination of online resources, but it also creates new problems. Digital products built on network technology are extremely vulnerable to malicious tampering and ma...

AI Technical Summary

Problems solved by technology

Digital products built on network technology are extremely vulnerable to malicious tampering and mass copying by illegal users, and it is difficult for legitimate users to prove ownership of the digital products

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