A method and device for identifying defaced serial numbers

A serial number and defacement technology, applied in the field of image processing, can solve the problems of serial number defacement, low recognition rate of banknote serial number, and affecting extraction efficiency of serial number, so as to improve recognition rate, reduce counterfeit banknote disputes, and protect depositors benefit effect

CN106683264BActive Publication Date: 2020-07-21SHENZHEN YIHUA COMP +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-07-21

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Abstract

The invention discloses an identification method and device of a stained crown size of RMB. The method comprises the steps of locating a crown size of RMB area, and obtaining a projection image of a pixel value in the crown size of RMB area; analyzing the projection image and determining whether the crown size of RMB is stained or not; if the crown size of RMB is stained, selecting a transmission image of a multi-color spectrum of the stained crown size of RMB area, and selecting a clear transmission image to conduct crown size of RMB identification. According to the identification method and device of the stained crown size of RMB, the stained crown size of RMB can be effectively identified, and the efficiency of identifying the crown size of RMB is improved.
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Description

technical field

[0001] The invention relates to the field of image processing, in particular to a method and device for recognizing defaced serial numbers. Background technique

[0002] As currency in circulation, banknotes play a pivotal role in daily life. In the process of frequent circulation, there will inevitably be stains of varying degrees, which may bring difficulties to the identification of serial numbers.

[0003] The serial number can play a role in controlling the amount of currency. The country can accurately grasp the currency circulation only by counting the number of serial numbers issued; Difficult rights protection and traceability issues. Therefore, it is of great significance to accurately identify the serial number.

[0004] At present, the defacement of the serial number part will be serious, which has affected the extraction efficiency of the serial number; the recognition rate of the serial number of the defaced banknotes is low, and it is difficu...

Examples

Embodiment 1

[0029] figure 1 It is a method for identifying defaced serial numbers provided by Embodiment 1 of the present invention. The method is suitable for banknote identification according to the serial number, and the method can be executed by an identification device for defaced serial numbers. A device for identifying defaced serial numbers can be realized by means of software and / or hardware, and is generally applicable to banknote checking machines, banknote checking modules and cash deposit and withdrawal machines. Such as figure 1 As shown, the method includes:

[0030] Step 110, locate the serial number area, and obtain the projection map of the pixel values ​​in the serial number area.

[0031] The serial number area of ​​banknotes is fixed, and after the version-oriented version is effectively identified, the serial number can be located in the fixed area.

[0032] Before locating the serial number area, first identify the currency type and orientation of the banknote, ...

Embodiment 2

[0040] figure 2 It is a method for identifying defaced serial numbers provided by Embodiment 2 of the present invention. In this embodiment, on the basis of the above-mentioned embodiments, if the serial number is defaced, the transmission image of the multicolor spectrum in the area of ​​the defaced serial number is collected, and a clear transmission image is selected for identification of the serial number. figure 2 As shown, the method includes:

[0041] Step 210, locate the serial number area, and obtain the projection map of the pixel values ​​in the serial number area.

[0042] Locate the serial number area, obtain the pixel value of each pixel point in the area; horizontally sum the pixel values ​​of each pixel point in the area, and draw a horizontal projection map of the pixel value in the serial number area; calculate the pixel value of each pixel point in the area The values ​​are summed vertically, and the vertical projection of the pixel values ​​in the seria...

Embodiment 3

[0060] Figure 6 It is a structural block diagram of a device for identifying defaced serial numbers provided in Embodiment 3 of the present invention. Such as Figure 6 As shown, the device includes:

[0061] The serial number positioning module 610 is used to locate the serial number area; the projection map acquisition module 620 is used to obtain the projection map of the pixel value in the serial number area; the defacement discrimination module 630 is used to analyze the projection map to determine whether the serial number Contamination; the transmission image selection module 640, if the serial number is defaced, then collect the transmission image of the multicolor spectrum in the area of ​​the defaced serial number; the serial number recognition module 650, used to select a clear transmission image for serial number recognition.

[0062] The embodiment of the present invention provides a device for identifying defaced serial numbers. Firstly, the serial number posi...