Text digital Watermark tech using character's features for carrying watermark information

A digital watermarking and character technology, which is applied in the fields of electrical digital data processing, image communication, special data processing applications, etc., can solve the problems of large influence of watermark information, difficulty in detecting digital watermark information in printed matter, and small capacity of watermark information carried by carrier files.

Inactive Publication Date: 2005-03-30
刘东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a text digital watermark technology that utilizes character font features to carry digital watermark information, which is used to solve the existing text digital watermark techno

Method used

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  • Text digital Watermark tech using character's features for carrying watermark information
  • Text digital Watermark tech using character's features for carrying watermark information
  • Text digital Watermark tech using character's features for carrying watermark information

Examples

Experimental program
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Effect test

Embodiment approach

[0096] Such as figure 1 As shown, by changing the continuity relationship between the strokes that make up the Chinese character "Wang" (100), different glyphs (110), (120), (130), (140) of the semantically identical character "Wang" are obtained. The height and width of these different glyphs are the same, and the font style of the glyphs is consistent, all of which are thin black fonts. Compared with the original character font (100), only a few strokes have been slightly shortened on the basis of the original font (100). However, these slight changes in strokes bring changes in the continuity relationship between strokes, thereby changing the topological structure of the glyph. In terms of topology, these small changes in strokes bring about a large change in the topological structure of the glyph. Usually, for characters like Chinese characters with many strokes and relatively complex fonts, there are many ways to change the continuity relationship between the strokes of ...

specific Embodiment approach

[0100] Hereby note: for the sake of brevity, the following examples of the encoding method mainly use the encoding example of character glyphs, but this does not affect the description of the specific implementation of the string glyph encoding method, and the encoding example method of character glyphs can be simply analogized to the encoding of the string glyph.

[0101] 1) The specific implementation of the encoding method based on the "graph" structure

[0102] Such as figure 1 As shown, at first according to the determined rule - the vertices, intersections and inflection points of the glyph strokes are mapped to the nodes (endpoints) of the "graph" defined in the mathematical discipline "Graph Theory", and the strokes between the vertices, intersections and inflection points are connected It is mapped as the edge of the "graph", and the different glyphs of "王" (100) are mapped to the "graph" defined in the mathematical discipline "graph theory". Where (110) is mapped t...

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PUM

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Abstract

Fundamental principle of the invention is that multiple fonts are designed for same character (string) in same semantic through changing relation of connection and disconnection between strokes of constituting character (string). Moreover, proper encoding is carried out for topological structure of these character fonts, and digital water ink information is carried out by these codes for different fonts of characters (string). The invention includes related contents: (1) method for designing multiple fonts of character; (2) method for encoding the said fonts; (3) method of unified encoding; (4) text digital water ink technique for encoding fonts respectively; (5) unified text digital water ink technique for encoding fonts. Features are: small influence on vision, simple and reliable detection method, good expansibility and large capability of information.

Description

technical field [0001] The invention belongs to the field of communication and information engineering, and specifically relates to data hiding, data encoding and decoding, and digital watermark technology. Background technique [0002] Digital watermarking technology is an important part of the field of information hiding technology. It uses digital embedding methods to hide information with specific meanings (digital watermarking information) in various digital images, sounds, videos, and text digital products. On the one hand, these electronic products with digital watermark information can be used normally without perceptibility, and on the other hand, the digital watermark information embedded in these digital products can be detected through specific technical means. Digital watermarking technology is widely used in many fields such as copyright protection of digital products, content verification and anti-counterfeiting, prevention of illegal copying, operation tracki...

Claims

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Application Information

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IPC IPC(8): G06F17/22H04L9/14H04N1/32
Inventor 刘东
Owner 刘东
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