Anti-counterfeiting method of print pictures based on CCD detection

Abstract

The invention discloses an anti-counterfeiting method of print pictures based on CCD detection and belongs to the field of presswork forgery prevention. The method includes: establishing an anti-counterfeiting information database, embedding anti-counterfeiting information, and detecting the anti-counterfeiting information. Recording in the anti-counterfeiting information database can be established according the need of a unit. The anti-counterfeiting information is embedded by embedding mesh points different in area rate into a half-tone picture, and the mesh points different in area rate are used to express character information. A detection method of the anti-counterfeiting information includes: using CCD equipment to acquire a print picture with embedded anti-counterfeiting information and a print picture with no embedded anti-counterfeiting information, extracting the embedded anti-counterfeiting information by a feature extraction method, determining a printed matter is true if the data matching with that in the database, and determining the printed matter is counterfeited if the data matching with that in the database is not obtained. The method has the advantages that forgery prevention for printed matters such as package and certificates in practical production can be achieved and copying difficulty is increased greatly.

Description

technical field [0001] The invention relates to a method for anti-counterfeiting of printed images based on CCD (full name in English: Charge-coupled Device, full name in Chinese: charge-coupled device), which is used in the field of anti-counterfeiting in printing. Background technique [0002] Whether it is traditional printing or digital printing, in the field of printed matter circulation, people are faced with an important problem, the authenticity of printed matter. This problem is reflected in many aspects, such as: the authenticity of packaging printed matter, the authenticity of certificates, etc. . At present, counterfeit and counterfeit items are rampant, which seriously hinders the harmonious development of society, and consumers encounter difficulties in safeguarding their rights. Therefore, it is extremely important for major packaging and printing companies and certificate authentication companies to add anti-counterfeiting functions to printed materials, whi...

AI Technical Summary

Problems solved by technology

On the whole, in the domestic and foreign halftone information embedding and extraction schemes, the information embedding and extraction of digital images in a simulated environment are mainly realized, and the detection of real printed matter based on different scanning devices is not really realized.

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