Method for identifying forgery seal based on feature line randomly generated by matching feature points
A technology of matching features and random generation, which is applied in character and pattern recognition, computer parts, instruments, etc., and can solve problems such as stamping differences
Inactive Publication Date: 2012-10-17
BEIJING UNIV OF CHEM TECH
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[0012] The object of the present invention is to provide a definite authenticity identification technical means by providing a counterfeit seal identification method based on matching feature points to randomly generate feature lines. In addition to solving the problems caused by the difference in stamping, it can also benefit from the identification technology. Levels increase the difficulty of counterfeiting seals
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[0067] The work process of the automatic identification technology method for high-simulation forged seals proposed by the present invention includes two stages of offline real seal learning and reference seal feature point database establishment stage and online pending seal recognition. A specific embodiment is described below.
[0068] 1) Offline stage:
[0069] The main task of the offline phase is to establish a reference database for the feature points of the real seal, and store the image of the real seal, the location information of the feature points contained in the real seal, and the descriptor information in the reference database. In this embodiment, a scanner is used to obtain the real seal printed on blank paper (such as figure 1 As shown), extract SIFT feature points (it should be noted that this embodiment takes SIFT local feature points as an example, but this patent does not limit the use of other types of local feature points), such as Figure 4 As shown, "x" in...
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The invention provides a method for identifying a forgery seal based on a feature line randomly generated by matching feature points. The method comprises the following steps: a step of off-line stage and a step of online identification stage to acquire an image of a seal affixed document containing a seal stamp to be verified by an imaging device; a step of preprocessing the image of the seal stamp to be verified, and a step of extracting an effective stamp image of the seal to be verified; a step of extracting a feature point of the seal image to be verified; a step of extracting the feather point of the image of the seal stamp to be verified, and a step of constructing a database containing location information and descriptor information of each feature point; a step of matching the features point of the seal to be verified with that of a reference seal; a step of randomly generating image feature lines of an identifiable seal to be verified and the reference seal; and a step of evaluating truth or forgery of the seal to be verified. The stamps affixed with the same seal under different situations have the two characteristics of accordant number and distribution of the feature points and accordant image information. The method has the characteristics of simpleness, high efficiency, high identification accuracy and the like, and contributes to seal forgery prevention.
Description
Technical field [0001] The invention belongs to the technical field of anti-counterfeiting identification of seals, and particularly relates to a method for identifying forged seals based on matching feature points to randomly generate characteristic lines, and is specifically aimed at new technologies and new methods for automatic identification of high-simulation forged seals. Background technique [0002] In my country, the seal is an important document that proves the identity of party and government agencies, enterprises, social organizations and other organizations, represents their rights and interests, and has legal effect. It is an important means for the state to exercise power, to manage society, and for citizens and legal persons to exercise civil rights. It plays an extremely important role in social politics and economic life. Due to my country’s backward technical means in seal management, seal anti-counterfeiting, and identification of forged seals, driven by hug...
Claims
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IPC IPC(8): G06K9/20G06K9/64
Inventor 郎海涛雷兰一菲
Owner BEIJING UNIV OF CHEM TECH