RMB sequence number identification method

An identification method and serial number technology, applied in the field of RMB identification, can solve the problems of not supporting RMB, insufficient recognition rate, and low real-time performance, etc., and achieve the effect of enhancing robustness and high identification accuracy

CN102800148BInactive Publication Date: 2014-03-26SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2014-03-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an RMB sequence number identification method which comprises the following steps of: S1, performing pretreatment on a paper money image, including improvement of serious exposure, extraction of paper money image and registration of paper money image; S2, positioning the sequence number by a two-step method, namely the first step of approximate positioning using priori knowledge and the second step of accurate positioning of the sequence number; and performing character segmentation of the sequence number by use of a vertical projection method; and S3, performing multiple extraction for the characteristic value according to the characteristics of the confusable character by a new 13-point characteristic extraction method, and performing identification by use of a support vector machine according to the position-type relationship of the character to obtain relatively high identification accuracy. The method disclosed by the invention can improve the robustness of a sequence number identification system on the input paper money images different in angle, illumination, background and resolution, and improves the positioning and identification speed and the identification accuracy.
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Description

technical field

[0001] The invention relates to the technical field of RMB identification, in particular to a method for identifying serial numbers of RMB banknotes. Background technique

[0002] The automatic recognition of the serial number of RMB banknotes is of great significance to national currency management, bank financial security and RMB banknote collection. First of all, in order to correctly plan and coordinate the monetary policy, it is necessary to have a good grasp of banknote information, such as the amount of RMB that has been issued and recovered, and the use of banknote serial numbers. Secondly, banknote serial number identification can be used to identify banknotes with specific serial numbers, providing conditions for financial institutions to carry out special treatment on specific currencies (robbery, counterfeit currency, etc.). Thirdly, the popularity of RMB collection in recent years has also made banknotes with auspicious numbers or anniversary da...

Examples

Embodiment

[0048] Such as figure 1As shown, the RMB serial number recognition method in this embodiment includes the following steps. First, preprocessing the banknote image, including processing such as improving severe exposure, extracting banknote images, and registering banknote images. Combining the top hat transformation on the basis of grayscale to improve the binarization effect of the banknote image; extracting the rectangular area where the banknote image is located to remove irrelevant background information; using the homography matrix to register the image to correct the tilt and eliminate the perspective effect ; First judge the reverse situation according to the left and right distribution of the binary image pixels of the banknote, and then judge the front and back of the banknote according to the color tone of the lower left area of ​​the banknote. The preprocessing algorithm can be well adapted to the subsequent serial number positioning, segmentation and recognition, a...