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Text digital water printing technology based on character topoloical structure

A topology, digital watermarking technology, applied in the fields of data hiding, data encoding and decoding, and digital watermarking technology, can solve problems such as the small capacity of the watermark information carried by the carrier file, the large influence of the watermark information, and the difficulty in detecting the digital watermark information of the printed matter.

Inactive Publication Date: 2005-10-19
刘东
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Problems solved by technology

[0010] The purpose of the present invention is to provide a text digital watermark technology that utilizes the topological structure of characters (strings) to carry hidden watermark information, which is used to solve the visual impact on users such as watermark information that occurs in the existing text digital watermark technology Large size, small capacity of watermark information carried by the carrier file, difficulty in detecting digital watermark information of printed matter, etc.

Method used

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  • Text digital water printing technology based on character topoloical structure
  • Text digital water printing technology based on character topoloical structure
  • Text digital water printing technology based on character topoloical structure

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specific Embodiment approach

[0092] Such as figure 1 As shown, by changing the continuous relationship between the strokes that make up the Chinese character "Wang" (100), the glyphs (110), (120), (130), ( 140). 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 complicated glyphs, there are many ways to change the topological structure of the characters. exist figure 2 Among them, the Chinese character "Qi" has 15 d...

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Abstract

The present invention provides a digital text watermark technology based on topological character structure and has the basic principle that by means of altering the topological structure of character, different character fonts with the same semanteme are designed and properly coded to carry digital watermark information. The present invention includes several methods of designing character font and coding character font and watermark forming and detecting technology. The digital text watermark technology of the present invention has the features of less visual influence, simple and reliable detection, high robustness, great watermark information capacity, etc.

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): G09C1/00
CPCG06T1/0021G06T2201/0062
Inventor 刘东
Owner 刘东
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