JP2891828B2 - Bill recognition method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bill recognition system.

[0002]

2. Description of the Related Art A conventional bill recognizing method has a distinction between a bill entrance and an exit of a bill discriminating unit, and corresponds to a bill recognizing process in a single bill conveying direction from the entrance. For this reason, bills have always been transported to the bill discrimination unit from a single direction. Therefore, in the cash processing apparatus using this bill discrimination unit, the dispensing route when the bill is dispensed from the safe is extremely longer than the deposit route conveyed when the bill is deposited.

[0003]

In the above-described conventional bill recognition system, the bill discriminating unit used has a distinction between a bill entrance and a bill, and the bill recognition process is performed in a single bill transport direction from the bill entrance. Only corresponded. Therefore, it is necessary to arrange the bill conveying direction in the bill discriminating unit at both the time of depositing and dispensing, and the mechanical structure of the bill conveying path of the cash processing machine becomes complicated, resulting in an increase in size. was there.

[0004]

The bill recognition system of the present invention comprises a contact image sensor and a magnetic image sensor for forming an analog image from a bill, a rotary encoder for outputting an encoder pulse, and the analog image for converting the analog image to the encoder pulse. An A / D converter that synchronizes to create a digital image, an image memory that stores the digital image, and binarized image data that emphasizes the edge of the bill from the digital image and stores the binary image data in the image memory. An image data parallel processing processor that creates skew-corrected image data in which an edge outside portion has been deleted from the binarized image data, stores the skew-corrected image data in the image memory, and affine-transforms the skew-corrected image data if necessary, A mechanical controller microprocessor that creates more banknote transport direction information, determines whether to rotate the skew correction image data by 180 degrees based on the banknote transport direction information, and instructs the image data parallel operation processor to perform affine transformation. And a banknote recognition microprocessor for comparing the skew-corrected image data, which has been affine-transformed or not, with the banknote recognition dictionary data.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a bill recognition device according to one embodiment of the present invention.

The analog image signal extracted by the contact image sensor 1 and the magnetic image sensor 2 is
The data is converted into digital data by the A / D converter 4 and written into the image memory 6 in synchronization with the encoder pulse 5 output from the rotary encoder 3 of the bill transport mechanism.

When all the raw data of the banknote image are written in the image memory 6, the banknote recognition microprocessor 10 sends the skew of the raw banknote image data to the image data parallel operation processor 8 via the image data access controller 7. (Skew) Correction, an instruction to execute 180 ° rotation correction of image data by conveyance in the bill validating unit 15 from both directions of bill entrance and exit is transmitted.

The image data parallel operation processor 8 comprises:
In order to detect a skew (skew) state in the bill validating unit 15, the A / D converter 4 supplies the image memory 6
The image data is binarized from the memory area (SRC area) of the multi-valued image raw data according to the gray level written in the image, and the edge of the banknote is emphasized and detected, and the binarized image data is stored in the memory area (DST area). Generate. next,
Skew (skew) correction is performed by executing a mask process.

[0010] In the mask processing, the outside of the edge (the part without bill data) is deleted from the image data (DST memory area) which has been binarized and edge detected from the multi-valued image raw data in the SRC memory area area. In the meantime, processing for storing data in a new DST image memory area is performed. By this mask processing, skew (skew) corrected banknote image data is created in the DST image memory area.

Next, based on the information from the photo sensor 12, the mechanical controller microprocessor 11 determines the direction in which the bill is transported, and transmits the information on the direction of entry into the bill discrimination unit 15 via the interface data bus 13 to the bill recognition microprocessor. Notify 10.

The banknote recognition microprocessor 10 determines whether or not it is necessary to rotate the banknote skew (skew) image data by 180 ° based on the banknote transport direction information, and corrects the image data if necessary. An application command is issued to the image data parallel operation processor 8 so as to execute the processing using the affine transformation which is the processing. When the image data parallel operation processor 8 receives the affine transformation application command, the DST
The skew (skew) corrected banknote image data currently stored in the image memory area is subjected to affine transformation (graphic rotation) and stored in a new DST image memory area. By the affine transformation processing, image data of the banknote that has been rotated by 180 ° is created in the DS image memory area.

When the above correction is completed, the DMA controller 14 transfers the processed image data to the banknote recognition microprocessor 10 and performs matching (comparison) with the banknote recognition dictionary data.

[0014]

As described above, according to the present invention, in bill recognition, skew (skew) correction of sample data of the close contact image sensor and the magnetic image sensor, and image by conveyance in the bill discrimination unit from both sides of the bill entrance and exit. By performing the 180 ° rotation correction of the data by the system using the image memory and the image data parallel operation processor, it becomes possible to read the image data of the bills conveyed regardless of the bill entering / exiting direction of the bill validating unit,
When paying in (customer entrance → safe) and dispensing (safety → customer entrance), the banknote transfer route is shared and the mechanism of the banknote transfer path is simplified.
This has the effect of being compact.

[Brief description of the drawings]

FIG. 1 is a block diagram of one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Contact image sensor 2 Magnetic image sensor 3 Rotary encoder 4 A / D converter 5 Encoder pulse 6 Image memory 7 Image data access controller 8 Image data parallel operation processor 9 System bus 10 Banknote recognition microprocessor 11 Mechanical controller microprocessor 12 Photosensor 13 Interface data bus 14 DMA controller 15 Banknote discrimination unit

Claims (1)

(57) [Claims] 1. A method for creating an analog image from banknotes.
Image sensor and magnetic image sensor,
A rotary encoder that outputs an encoder pulse and the analog encoder
The log image is synchronized with the encoder pulse and digitized.
An A / D converter for creating a digital image and the digital
An image memory for storing digital images;
Binarization that emphasizes the edge of the bill from digital images
Create image data and store it in the image memory,
The part outside the edge was deleted from the binarized image data.
Create skew-corrected image data and create the image memo
And store the skew-corrected image data
Image data parallel operation processor with more affine transformation
And the information on the bill conveyance direction based on information from the photo sensor.
A mechanical controller microprocessor for generating information,
The skew correction image is determined by the transport direction information of the bill.
Judge whether to rotate the data by 180 degrees,
Implement affine transformation for image data parallel processor
And the affine transformed or no
Ratio between cue correction image data and banknote recognition dictionary data
Having a banknote recognition microprocessor for comparison
Characteristic bill recognition method.