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Watermark processing method and system

A processing system and processing method technology, which are applied in the field of watermark processing methods and watermark processing systems, can solve the problems of difficulty in creating semantically and logically coherent paragraphs, poor concealment effect, and difficulty in implementation, and achieve the effect of watermark processing.

Active Publication Date: 2014-11-05
BEIJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

However, due to the ambiguity and complexity of Chinese language, it is difficult to create semantically and logically coherent paragraphs, which is difficult to implement and has poor concealment effect

Method used

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  • Watermark processing method and system
  • Watermark processing method and system
  • Watermark processing method and system

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Embodiment Construction

[0056] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0057] For the sake of brevity and intuition in description, the solution of the present invention is described below by describing several representative implementation manners. Numerous details in the embodiments are only used to help the understanding of the solutions of the present invention. But obviously, the technical solutions of the present invention may not be limited to these details when implemented. In order to avoid unnecessarily obscuring the solution of the present invention, some embodiments are not described in detail, but only a framework is given. Hereinafter, "including" means "including but not limited to", and "according to..." means "at least according to, but not limited to only based on...". Due to the language habits of Chinese, when t...

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Abstract

The invention provides a watermark processing method and system. Watermark character string information are coded into quinary bitstreams, quinary check beginning information and quinary check ending information are added in the quinary bitstreams, and therefore quinary embedded information is acquired; pdf files are loaded, the pdf files are unified on a standard blank character in a hexadecimal mode, a preset mapping relation between the pdf files is represented according to the quinary content and the hexadecimal of the standard blank character, and the content of the standard blank character is modified to embed the quinary embedded information into the pdf files; the pdf files are analyzed to acquire the content of the stand blank character, the quinary embedded information is extracted according to the preset mapping relation, the quinary bitstreams are extracted from the quinary embedded information according to the quinary check beginning information and the quinary check ending information, and the quinary bitstreams are decoded into the watermark character string information.

Description

technical field [0001] The invention belongs to the technical field of digital watermarks, in particular to a watermark processing method and a watermark processing system. Background technique [0002] The so-called digital watermark is to add some digital information to data multimedia (such as image, sound, video signal, etc.) to achieve the functions of document authenticity identification and copyright protection. The embedded watermark information is hidden in the host file without affecting the observability and integrity of the original file. The process of digital watermarking is to embed some information that can prove copyright ownership or track infringement into protected digital objects (such as still images, videos, audios, etc.), which can be the author's serial number, company logo, meaningful text, etc. . There are many concepts that are similar or closely related to watermarking. Judging from the current literature, there are already concepts such as Inf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/16
CPCG06F21/16G06F21/1063
Inventor 郭燕慧李祺高晓梦杨昕雨
Owner BEIJING UNIV OF POSTS & TELECOMM
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