JPH01281591A - Paper money discriminating device - Google Patents

Abstract

PURPOSE:To rapidly decide the sort of paper money and its carrying direction by providing the title device with 1st and 2nd optical detecting means for reading out the whole surfaces of the front and rear faces of carried paper money, an image data storing means, etc., to recognize a character indicating the sort of the paper money. CONSTITUTION:When paper money is carried by a carrying means, the front and rear faces of the paper money is irradiated with light beam from light sources 3, 7, their reflected light beams are read out by image sensors 1, 5 and alternately supplied to an A/D converter 10 through amplifiers 8, 14 and analog switches 9, 15. The front detecting pattern of the paper money out of data converted into digital data by a CPU 12 is stored in a front detecting pattern memory 22 of a RAM 13, a rear detecting pattern is stored in a rear detecting pattern memory 23 and paper money frame data corresponding to the frame shape of the paper money are extracted. A data cell group is extracted from the paper money frame data and reference position data 19 extracted from a ROM 16, respective density distribution is calculated and coincidence with density distribution reference data 20 is compared and decided. Consequently, the sort and carrying direction of carried paper money can be rapidly discriminated.

Description

[Detailed Description of the Invention] [Field of Application for Business Owners] The present invention relates to a bill discriminating device that discriminates the denomination of a bill (1,000 yen bill, 5,000 yen bill, 10,000 yen bill), and particularly relates to a bill discriminating device that discriminates the denomination of a bill (1,000 yen bill, 5,000 yen bill, 10,000 yen bill). The present invention relates to a banknote discriminating device suitable for use in discriminating denominations by detecting denominations.

[Prior Art] Conventionally, a banknote is irradiated with light, the reflected light or transmitted light from the banknote is received in each area by a light receiver, and the light 7 (H conversion is performed), and the output signal from the light receiver is used to detect the banknote. As a device for detecting type I, front and back, etc., [Paper sheet detection device]
22727) is publicly known.

[Problem to be Solved by the Invention] By the way, the conventional paper type M detection device as described above has the following problems.

For example, the front side of a 1,000 yen bill is conveyed from the direction of the person's image so that it faces the scanning means, and the banknote surface including the watermark pattern is carried along a line parallel to the center line in the long side direction of the banknote surface in the direction of the short side. When scanning a banknote, the transport direction of the banknote may be opposite to the above transport direction (when the banknote is transported from the ``1000 yen'' direction instead of the ``person image direction''), or the banknote transport direction may be opposite to the scanning means. If it is on the back side, the banknote cannot be identified. In order to deal with such cases, each image data pattern is memorized when scanning both the front and back sides of the banknote along lines that are shifted parallel to each other in the width direction from the center line in the long side direction of both sides. It becomes necessary to keep it. As a result, the capacity of the memory for storing the six image data patterns increases, and the process of comparing each scanned image data pattern with the reference data pattern to determine the denomination of the banknote becomes complicated. There were some problems, such as hindrances to high-speed processing.

The present invention solves the above-mentioned problems, and aims to provide a banknote discriminating device that can quickly determine the denomination and conveyance direction of a banknote by recognizing the denomination characters of the banknote.

[Means for Solving the Problems] In order to achieve the above object, the present invention recognizes the specific denomination characters of the banknotes conveyed through the conveyance path, thereby identifying the denomination, front and back sides, and direction of conveyance of the banknotes. A first bill discriminating device configured to discriminate, which is provided on one side of the conveyance path facing the bill conveyance surface, and reads the entire surface of one side of the conveyed banknote.
and a second optical detecting means provided on the other side of the conveyance path facing the banknote conveyance surface to read the entire surface of the other side of the conveyed banknotes.
an optical detection means, an image data storage means for storing image data of the conveyed bill read by the first and second optical detection means, and a reference position data of the area including the denomination character and the image data of the area. a denomination-specific data storage means for storing denomination-specific data consisting of density distribution data and banknote outer shape data for each denomination of banknotes in advance; Based on the denomination-specific data stored in advance in the storage means, the external shape of the conveyed banknote, the reading position of the area on the conveyed banknote, and the density distribution of the area are calculated, and the denomination, front and back sides, and conveyance direction of the conveyed banknote are determined. It is characterized in that the control means for determining the .

[Function] According to the present invention, the ii%8 position data, the density distribution reference data, and the external shape data corresponding to the area including the denomination character of the banknote are set in advance, and each of these data and the first and second Since the denomination, front and back, and direction of conveyance of the banknote are determined based on the image data obtained by reading and scanning the conveyed banknote by the optical detection means, it is possible to perform a more accurate and faster determination process than conventional methods.

[First Example] Hereinafter, each example of the present invention will be described with reference to the drawings.

(i) First Example Figure 1 is from this book! FIG. 2 is a block diagram showing a control system of the banknote discriminating device according to the embodiment. Reference numeral 1 in the figure is an image line sensor, which is perpendicular to one banknote surface of the banknote P that is transported at a predetermined speed along the transport path (the path shown in the figure) by the transport means, and is spaced apart from the one banknote surface by a predetermined distance. It is located in the same position. In this case, the conveyance direction of the banknote P is the long side direction of the banknote.

A lens 2 is disposed between the image line sensor I and the location where the conveyed bill P is located, and a light source 3 is disposed near the lens 2, and a light source 3 is disposed in the vicinity of the lens 2. It is designed to irradiate from The image line sensor 1 is driven by a drive circuit 4, reads optical information obtained by condensing reflected light from a banknote P illuminated by a light source 3 with a lens 2, converts the optical information into an electrical signal, and converts the optical information into an electrical signal to generate a charge. The accumulated Tri load is output as serial image data (analog data).

Similarly, an image line sensor 5 driven by a drive circuit 4 is arranged at a position perpendicular to the other banknote surface of the banknote P and separated from the other banknote surface by a predetermined distance. The sensor 5 reads optical information obtained by condensing reflected light through a lens 6 when the other banknote surface of the banknote P is obliquely irradiated by a light source 7, photoelectrically converts the optical information into an electrical signal, and converts the optical information into an electric signal as a charge. The accumulated charges are output as serial image data (analog data).

Analog data output from the image line sensor 1 is amplified by an amplifier 8, converted to digital data by an A/D converter 10 via an analog switch 9, and then input to the I/O by the CPU 2 via a data bus 11.
Stored in IAM+3. Similarly, analog data output from the image line sensor 5 is amplified by an amplifier 14, converted to digital data by an A/D converter lO via an analog switch 15, and then transferred to a RAM 13 by Cr'U 12 via a data bus 11. is stored in When the analog switch 9 is turned on, the analog data output from the image line sensor 1 is supplied to the A/D converter 10, and when the analog switch +5 is turned on, the analog data is output from the image line sensor 5. Analog data is sent to A/D converter I
It is designed to be supplied to O.

10Ml6 stores a control program 17 for the bill discriminating device and data by denomination 18, and the data by denomination 1
8 is each denomination (10,000 yen note, 5,000 yen note).

Extraction reference position data 19 that is set in advance for each denomination (1,000 yen note) and corresponds to the reference position of the data cell for each denomination described below.
, density distribution reference data 20 corresponding to the density distribution of data cells for each gold PL, which will be described later, and outer shape data 21 corresponding to the frame shape (outer shape) of each gold type. Said r
tAM+3 includes a front detection pattern memory 22 that stores the front detection pattern of the banknote detected by the image line sensor 1, a dust detection pattern memory 23 that stores the dust detection pattern of the banknote detected by the image line sensor 5, a density distribution calculation result memory 24 that stores calculation results of the density distribution of data cells, which will be described later, by the CPUI 2;
The denomination provisional determination memory 25 stores denomination provisional determination data provisionally determined by the CI'UI 2 based on the frame shape (outline) of each denomination.

By the way, as shown in FIG. 2, in general, when the sensor 11111 minutes of the image line sensor is used as unit data, and the image line sensor scans the banknote once in the long side direction, one line of the banknote corresponding to one scan is obtained. Since there is one unit data per minute, the set of unit data obtained by scanning one banknote once is nXl
It can be thought of as a matrix of

Therefore, in this embodiment, the image line sensor 1,
In order to distinguish each banknote (10,000 yen note, 5,000 yen note, 1,000 yen note) according to 5, a method of recognizing the characters on the banknote, that is, a method of extracting the characters, is adopted. In this case, if the characters to be extracted are limited to one gold character (“10,000 yen”, “5,000 yen”, “1,000 yen”), the printing position and coloring of the character of the denomination can be changed for each banknote. Since it is determined in advance, if the position of the denomination character to be recognized is set in advance for each banknote transport direction, the position to be processed on the data matrix as described above will be automatically determined. For example, as shown in Figure 3, in the case of a 10,000 yen note, the denomination character to be recognized is the character ``10,000,'' and an area At that fits this character ``10,000'' is set, and the area Al In order to perform character recognition within the area
The data is binarized by applying a filter to the data, and the cells forming the character [10,000] are extracted, thereby extracting the character '10,000'.

In this case, the data in the area Al is binarized by cutting it at an appropriate threshold value, and the cells forming the character "10,000" are extracted. Then, character recognition is performed by creating vertical and horizontal density distributions for the binarized data.

Here, if the sequence of the binarized data is 1j=Oor I (1≦i≦n, I≦j≦−), Xi=ΣAij, Y i=ΣAij (1≦i≦
71. The two data strings given by 1≦j≦layer) are each given a vertical density distribution,
The density distribution is in the horizontal direction. Therefore, the xY data strings of the character "10,000" of the 10,000 yen note shown in FIG. 3 are as follows.

X = (0, 0, 0, 14, 14, 2, 5, 7, 5,
4,6,7,3,Q,0.0)Y = (0,4,4,
4, 4, 4, 4, 5, 7, 6, 6, 7, 6, 4, 2, 0
) Also, the density distribution of each XY data string at this time is shown in a graph as shown in FIG. That is, what is shown in this graph becomes the density distribution reference data 20 for the ``10,000'' character of the 10,000 yen note. Note that the density distribution reference data for the character "1,000" on the 5,000 yen note and the character "1,000" on the 1,000 yen note are omitted.

Therefore, two data strings (vertical density distribution,
The horizontal density distribution) is compared with the standard data string of J& quasi, and the read data string is a specific character (“10,000” for a 10,000 yen note and “1,000” for a 5,000 yen note.

The denomination character is recognized by determining whether it represents the ``1000'' of a 1,000 yen note, and the denomination of the banknote is determined. In addition, since the position and direction of the denomination characters change depending on the conveyance direction of the banknote, the image line sensor 1,
5, when character recognition is performed, the direction in which the banknote is conveyed is determined by detecting which position of the data area was processed for which recognition was not possible.

Here, the extraction reference position data I9 and the external shape data 21 of the ROM 16 are set in advance for each convex coin 1 (10,000 yen bill, 5,000 yen bill, 1,000 yen bill) as shown in FIG. That is, if we take the upper left corner of the front side of each banknote as the origin of the XY coordinates, in the case of a 10,000 yen note, the coordinates (X,.

Y , ), (X lt, Y +1), (X z, Y t
t), (X + t, Y ,) Te The data in the rectangular data cell A2 that fits the enclosed character "10,000" is set as the extraction reference position data 19, and in the case of a 5,000 yen note, (X *+, Yt
l), (X tt, Y m+), (X tl.

Extract the data in the rectangular data cell A2 that fits the character "1000" surrounded by
,,,Y,,).

(X 1t, Y sr), (X !l+ Y sz)
, (X st, Y sz), the data in the rectangular data cell A3 in which the character "thousand" is contained is set as the extraction reference position data 19.

Also, for each banknote, external shape data 21 corresponding to the frame shape (outside shape) of the banknote. That is, (X , L , Y +L), (X
tL.

Y tt, ), (x 3L , Y 3L ) are rtO
M+61. , is stored.

Next, the operation of the first embodiment using the R configuration described above will be explained with reference to FIG.

Step SAI: When a banknote is transported by the transport means, light is irradiated from the light source 3.7 to the front and back banknote surfaces, and the reflected light is sent to the image line sensor I.

5. These image line sensors1.
The analog data outputted from 5 is amplified by amplifier 8, I4, and the 6 analog data is amplified by analog switch 9, 15, which is switched ON10FF as appropriate.
/D converter IO alternately. After these analog data are converted into digital data by the A/D converter IO, the front detection pattern of the banknote is stored in the front detection pattern memory 22 of the RAM I 3 by the CPU 2. It is stored in the detection pattern memory 23.

Step SA2: CPU2 is the image line sensor! , 5 extracts bill frame data corresponding to the frame shape (outer shape) of the bill read and scanned.

Step SA3: The CPU 2 extracts the banknote frame data extracted in step SA2 and the extraction reference position data of +10M+6! A data cell group is extracted from 9. in this case,
The data cell group of the 10,000 yen note includes a data cell A1 on the front side of the banknote in which the character "10,000" fits, a data cell symmetrical to the data cell AI in the long side direction of the front side of the banknote, and a data cell on the back side of the banknote that corresponds to each of these data cells. Total of 48 data cells! There are many kinds. Therefore, in the extracted data cell group, the banknote denomination is N.
If there are different types, the total will be NX4.

Step SA4: CPU I2 performs the above step S
The density distribution of each data cell group extracted in A3 is calculated and stored in the density distribution calculation result memory 4 of nAMI3.

Step SA5+CPU 2 compares the density distribution of each data cell group calculated in step SA4 and stored in the density distribution calculation result memory 24 with the density distribution reference data 20 of R0Ml(i).

Step SA6: CPU2 is the upper 8 step SA5
It is determined whether or not the density distribution of each data cell group compared with the density distribution reference data 20 is one type of data, and if it is not one type, it is determined to be abnormal and an alarm is sounded. In this case, the process moves to step SA7.

Step SA7: The CPU 2 determines the denomination, front and back sides, and transport direction of the banknote to be transported based on the results up to step SA6.

(ii) Second Embodiment The configuration of this second embodiment is the same as that of the first embodiment, and the explanation thereof will be omitted. In this second embodiment, an image line sensor is used! , 5, the denomination of the transported banknote is provisionally determined based on the frame shape (outer shape) of the transported banknote read and scanned.

Next, the operation of the second embodiment will be explained based on FIG. 7.

Step SBI: When the banknotes are transported by the transport means, light is irradiated from the light source 3.7 onto the surface of each banknote, and the reflected light is read by the image line sensors 1 and 5. Analog data outputted from these image line sensors 1.5 is amplified by an amplifier 8.14, and then outputted by an analog switch 9. ! 5, the table detection pattern is converted into digital data by the A/D converter 10, and then the table detection pattern is converted into digital data by the A/D converter 10.
At the same time, the dust detection pattern is stored in the dust detection pattern memory 23.

Step S[32: The CPU 12 extracts bill frame data corresponding to the frame shape (outer shape) of the bill read and scanned by the image line sensors 1 and 5.

Step SB3: The CPU 2 tentatively determines the denomination of the banknote based on the banknote frame data extracted in step SB2, and stores it in the denomination provisional determination memory 25 of RAM+3.

Snap SB4: The CPU 12 extracts a total of 4F111 data cell groups on both sides from the banknote frame data extracted in step SB2 and the extraction reference position data I9 of rtOM16 corresponding to the denomination of the banknote tentatively determined in step 5I33. do.

Step SB5: Cr'U12 is the step 5I3 above.
The density distribution of each of the four types of data cell groups extracted in step 4 is calculated.

Step 5I36: Cr'UI2 performs the above step SB
The density distribution of each data cell group calculated in step 5 and the ROM
+6 density distribution reference data 20 is compared.

Step SB7: CPU2 performs step 5r36 above.
It is determined whether the density distribution of the valleys of the data cell group compared with the density distribution reference data 20 is one type of data, and if it is not one type, it is determined to be abnormal and an alarm is sounded. If it is one type, the process moves to step SB8.

Step SB8: Cr'UI2 performs step SB7 above.
Based on the results up to this point, the denomination, front and back, and direction of transport of the banknote to be transported are determined.

However, according to the valley embodiment described above, the reference position data and density distribution basic data corresponding to the specific denomination character of the banknote, and the external shape data corresponding to the frame shape (outside shape) of the banknote are set in advance. Since processing is performed based on the results of reading and scanning the conveyed banknotes using the image line sensor 1.5, the denomination, front and back sides, and conveyance direction of the banknotes can be determined accurately and at high speed.

[Modifications] (1) In each of the above embodiments, an image line sensor is used, but the present invention is not limited to this, and for example, another optical sensor such as an area sensor may be used.

(2) In each of the above embodiments, the denomination, front and back, and direction of conveyance of the banknotes are determined, but the present invention is not limited to this, and can be applied to, for example, recognition of cards read in card leagues and the like.

[Effects of the Invention] As explained above, according to the present invention, the denomination, front and back sides, and direction of conveyance of the banknote can be determined by recognizing the specific denomination characters of the banknote conveyed along the conveyance path. In the banknote discriminating device configured, the first banknote discriminating device is provided on one side facing the banknote conveyance surface of the Moeki conveyance path and reads the entire surface of one side of the conveyed banknote.
and a second optical detecting means provided on the other side of the conveyance path facing the banknote conveyance surface to read the entire surface of the other side of the conveyed banknotes.
an image data storage means for storing the image data of the conveyed banknote read by the first and second optical detection means, and a reference position data of the area including the hammer character and the image data of the area. a denomination-specific data storage means for storing in advance denomination-specific data consisting of density distribution data and banknote outer shape data for each denomination of banknotes; ! ! Based on the image data and the denomination-specific data stored in advance in the denomination-specific data storage means,
The configuration includes a control means that calculates the outer shape of the transported banknote, the reading position of the area in the transported banknote, and the density distribution of the area, and determines the denomination, front and back, and transport direction of the transported banknote. It is possible to achieve the following effects.

■Since the denomination, front and back, and conveyance direction of the banknotes are determined by recognizing the hammered characters on the banknotes, banknote discrimination processing can be performed more accurately and faster than conventional methods, and the capacity of the storage means is reduced. be able to.

■Also, the denomination of the banknote can be accurately determined regardless of which end of the banknote's long side the banknote is conveyed from or whether the banknote surface facing the optical detection means is front or back. .

(2) If the bill discriminating device according to the present invention is incorporated into a bill processing machine, a currency exchange machine, etc., the reliability of each of these machines can be improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of a banknote discriminating device common to each embodiment of the present invention, and Fig. 2 shows a data string when one banknote is read and scanned by an image line sensor common to each embodiment. Figure 3 is a diagram showing the data arrangement when the character "10,000" of the 10,000 yen note is changed to 2 (a), which is common to each embodiment.
Figure 4 (a) and (b) are the XY of the "10,000" character in Figure 3, respectively.
Diagram showing the density distribution of data strings, Figure 5 (a), (b),
(c) is a diagram showing the external shapes and extraction reference positions of a 10,000 yen bill, a 5,000 yen bill, and a 1,000 yen bill, which are common to each example, and FIG.
Flowchart for explaining the operation of the embodiment. FIG. 7 is a flowchart for explaining the operation of the second embodiment. 1... Image line sensor (fth or second
(optical detection means), 5... image line sensor (second or first optical detection means), 12...
...CPU (control means), 13...RAM (
image data storage means), 16...RoM (data storage means by denomination). Applicant: Laurel Bank Machine Co., Ltd. Figure 1 Figure 2 Figure 3 Figure 2a
window/! Small rabbit density distribution Figure 5 (A) Figure 6 Figure 7

Claims (1)

[Scope of Claims] A banknote discriminating device configured to discriminate the denomination, front and back, and conveyance direction of a banknote by recognizing specific denomination characters of a banknote conveyed through a conveyance path, comprising: a first optical detection means, which is provided on one side of the conveyance path facing the banknote conveyance surface, and reads the entire surface of one side of the conveyance banknote; and a first optical detection means, provided on the other side of the conveyance path, which faces the banknote conveyance surface, and reads the entire surface of one side of the conveyance banknote; a second optical detection means for reading the entire surface of the other side of the banknote; an image data storage means for storing image data of the conveyed bill read by the first and second optical detection means; and an area including denomination characters. denomination-specific data storage means for storing in advance denomination-specific data for each denomination of banknotes, consisting of reference position data of the area, density distribution data of the area, and banknote external shape data; Based on the image data and the denomination-specific data stored in advance in the denomination-specific data storage means, the outer shape of the conveyed banknote, the reading position of the area on the conveyed banknote, and the density distribution of the area are calculated, and the gold of the conveyed banknote is calculated. A bill discriminating device comprising: a control means for discriminating the type, front and back, and conveyance direction.