JP2915608B2 - Paper processing equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet processing apparatus for judging whether or not an inserted sheet is genuine.

[0002] This type of apparatus is used in an automatic machine for delivering and receiving bills, securities and the like.

[0003]

2. Description of the Related Art A sheet fed into an apparatus is read by using a transmission type optical sensor, and the read data is converted into data expressing the density of the sheet in a multi-valued manner.

FIG. 6A shows read data of the inserted paper sheet 10, and the entire input paper sheet 10 is included in the field of view for reading.

[0005] When the read data of the paper sheet 10 is converted into data of multi-value expression, the paper sheet 1 indicated by the data is converted.
The coordinate conversion of 0 is performed, and the paper sheet 10 is rotated and moved to a predetermined posture as shown in FIG.

At this time, density correction of the multi-valued expression data is performed, and as a result, the paper sheet 10 is normalized.

[0007] Further, the normality of the shape of the paper sheet 10 is checked, and the paper sheet 10 having a large dropout (due to a tear or the like) or a defective hole,
Is rejected as having an abnormal shape.

When the normality of the shape of the paper sheet 10 is confirmed, the normalized data is compared with the dictionary data shown in FIG.

As the dictionary data, data obtained by reading regular paper (genuine bills) to be handled by the apparatus and converted into data in which the paper density is represented by multi-values is used. It is determined from the comparison result of the data 10 and the dictionary data whether the paper sheet 10 is legitimate.

At this time, if it is determined that the paper sheet 10 is not regular (recognition abnormality), the handling of the paper sheet 10 is rejected, and it is determined that the paper sheet 10 is regular (normal recognition). Then, the handling of the paper sheet 10 is started.

When the paper sheet 10 is inserted as described above, it is first checked whether or not the paper sheet 10 has an acceptable defect (a missing portion, a defective hole, or a fold) (normal shape). Check), when acceptable (normal shape), the transparent pattern of the paper sheet 10 is checked against a dictionary prepared in advance.

[0012]

Here, there is a demand for reliably rejecting the handling of illegally forged or altered paper sheets.

In this case, it is necessary to more strictly check the input paper sheet with the dictionary.

However, if the inserted paper sheet has minute missing portions or missing holes, or is slightly folded, these missing portions do not match the dictionary, so that the regular Even if a paper sheet is inserted, its handling is refused.

For example, as shown in FIG. 6 (A), when a normal paper sheet 10 whose upper left corner is missing is inserted,
Although the degree of this loss is allowed (normal shape) as shown in FIG. 3B, the handling of the paper sheet 10 is rejected by strict collation with the dictionary (recognition abnormality).

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to ensure that unauthorized handling of paper sheets is refused and that paper sheets having an acceptable degree of loss are handled. An object of the present invention is to provide a device that can be used.

[0017]

In order to achieve the above object, a sheet processing apparatus according to the present invention is configured as shown in FIG.

In FIG. 1, reading is performed by the sheet reading section 12 using the transmitted light of the sheet 10, and the read data of the inserted sheet 10 is stored in the field of view. The shading of the paper sheet 10 is converted by the data converting means 14 into data represented by multi-values.

Then, the normality of the shape of the input paper sheet 10 is checked using the multi-valued expression data.
Checked at 6.

Further, dictionary data expressing shades in multiple values over the entire normal paper sheet are registered in the dictionary registration means 18, and the multi-valued expression data of the input paper sheet 10 whose shape has been checked for normality is stored in the dictionary registration means 18. The entire data and the dictionary data are compared by the data comparing means 20.

Further, abnormal data that deviates from a fixed value range among the multi-valued expression data of the input paper sheet 10 whose shape has been checked for normality is specified by the abnormal data specifying means 22.

Here, the part relating to the abnormal data in the comparison result between the multi-valued expression data and the dictionary data is invalidated by the abnormal comparison result removing means 24, and the sheet normality determining means 2
In 6, it is determined whether or not the input paper sheet 10 is a normal paper sheet using the comparison result in which the portion relating to the abnormal data is invalidated.

[0023]

According to the present invention, the missing portion (part relating to abnormal data) of the paper sheet 10 is masked when the paper sheet 10 is compared with the dictionary (18), and the transparent pattern of the paper sheet 10 is removed in a form excluding this part. It is determined whether or not matches with the dictionary.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a paper sheet processing apparatus according to the present invention will be described below with reference to the drawings.

FIG. 2 illustrates the configuration of the embodiment.
The paper sheet 10 fed into the apparatus and conveyed inside is detected by the paper sheet detection unit 40.

The detection output of the sheet detecting section 40 is given to a central processing unit 42, and the optical sensor unit 12 is started by the central processing unit 42.

In the optical sensor section 12, reading is performed using a light transmission type sensor in accordance with the transport of the paper sheet 10, and an output obtained by sampling the read data is obtained.

The output of the optical sensor unit 12 is supplied to the A / D conversion unit 14 via the amplification unit 44, and is converted into digital data that expresses shading in multiple values (the pattern of the paper sheet 10 is expressed in gradation). Is done.

The digital data is sent to the image processing section 16, and the processing for rotating and moving the paper sheet 10 indicated by the data and the processing for correcting the density (density) of the paper sheet 10 are performed by the central processing unit 42. It is performed according to the instructions of.

Further, it is determined whether or not the partial missing, missing hole, or fold (see FIG. 3) of the paper sheet 10 is of an acceptable level (shape check). The subsequent processing is interrupted by the central processing unit 42, and the handling of the inserted paper sheet 10 is refused.

The image processing unit 16 determines the shape of the paper sheet 10.
Is confirmed by the central processing unit 42, the dictionary comparison unit 46 is activated, and the data of the paper sheet 10 and the dictionary data of the dictionary data unit 18 are compared pixel by pixel.

In the dictionary data section 18, data indicating the density of a normal paper sheet in multi-values is registered in advance as dictionary data, and a judgment is made based on a comparison result between the dictionary data and the data of the paper sheet 10. The contents (the result of determining whether the paper sheet 10 is legitimate) are written from the dictionary comparison unit 46 to the storage unit 48.

In this embodiment, when the image data representing the density of the paper sheet 10 by multi-values is normalized by the image processing unit 16, the paper sheet 10 becomes 0-FFH as shown in FIG. Expressed in 256 gradations, the gradation level of the paper sheet 10 is 40H
The level range is ~ 80H.

In a missing portion or a missing hole of the paper sheet 10, since the detection light is transmitted at the time of reading, the gradation level becomes COH or more as shown in FIG.

Further, in the folded portion of the paper sheet 10, the detection light is doubly blocked at the time of reading, so that the gradation level becomes 10H or less as shown in FIG.

In the image processing section 16, the normalized data is matched with the two fixed slice levels 20H and AOH (see FIG. 2), and the normalized data that deviates from the range determined by the slice levels is specified as abnormal data. Is done.

That is, the missing part, the missing hole part, and the broken part of the paper sheet 10 are specified by the image processing unit 16.

At this time, since the gradation level is remarkably different between the defective portion of the sheet 10 and the other portion, the sheet 1
The missing part of 0 is specified reliably.

FIG. 4 explains the processing contents of the image processing section 16, and stores the positions of pixels (abnormal data parts) of these defective portions (steps 400 and 40).
2) and a process (step 404) of sending an instruction to invalidate the comparison result of these positions to the dictionary comparison unit 46 is performed.

In the dictionary comparing section 46, the image processing section 16
The process of collating the data normalized by the above with the dictionary data of the dictionary data unit 18 on a pixel-by-pixel basis is more strictly performed, and therefore, the handling of the forged or altered fraudulent paper sheet 10 is securely refused. it can.

However, when the normalized data is compared with the dictionary data, the comparison result regarding the missing portion of the paper sheet 10 is invalidated.

Therefore, even if the collation with the dictionary is strictly performed, the regular paper sheet 10 is of such a degree that the existence of a defect is permitted.
Is determined by the dictionary comparison unit 46 to handle the paper sheet 10.

FIG. 5 explains the above-mentioned operation. When a paper sheet 10 (regular one) with a part missing is inserted as shown in FIG. ), The paper sheet 10 is recognized as a legitimate one as shown in FIG. 3C, even if the collation with the dictionary is strictly performed.

As described above, according to the present embodiment, the comparison with the dictionary can be strictly performed, and the normal paper sheet 10 having an acceptable degree of loss can be handled in the same manner as a sheet having no loss.

That is, it is possible to more completely prevent unauthorized use of the paper sheet 10 and to avoid an increase in the rejection rate associated therewith, and as a result, it is possible to provide a highly reliable apparatus for the apparatus owner and the user. Becomes

Note that the defective portion of the paper sheet 10 is specified using a fixed slice level, and the amount of processing is small. Therefore, the increase in processing time due to this is negligible, and therefore, the processing speed is reduced. I will not invite you.

[0047]

As described above, according to the present invention, a paper sheet can be strictly compared with a dictionary, and a regular paper sheet having an acceptable degree of loss can be handled in the same manner as a sheet having no loss. Therefore, it is possible to more completely prevent unauthorized use of the paper sheet and to avoid an increase in the rejection rate accompanying this.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a diagram illustrating the configuration of an embodiment.

FIG. 3 is an explanatory diagram of an input paper sheet.

FIG. 4 is a flowchart illustrating processing performed by an image processing unit.

FIG. 5 is an operation explanatory view of the embodiment.

FIG. 6 is an explanatory diagram of a conventional technique.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Paper sheet 12 Optical sensor part 14 A / D conversion part 16 Image processing part 18 Dictionary data part 40 Sheet detection part 42 Central processing unit 44 Amplification part 46 Dictionary comparison part 48 Storage part

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G07D 7/00 G06T 7/00

Claims (1)

(57) [Claims] 1. A sheet reading means (12) in which the entire field of view of an inserted sheet (10) is read using the transmitted light of the sheet (10), and a sheet reading means (10). A data conversion means (14) for converting the read data into data in which the density of the paper sheet (10) is represented by multi-values; and a normality relating to the shape of the input paper sheet (10) using the multi-valued data. Paper shape checking means (16) to be checked, dictionary registration means (18) in which dictionary data in which shades are represented by multi-values over the entire regular paper sheet are registered, and input paper whose shape is checked for normality A data comparing means (20) for comparing the multi-valued expression data of the leaf (10) with the dictionary data as a whole, and a fixed value range of the multi-valued expression data of the input paper sheet (10) whose shape has been checked for normality Error data that identifies abnormal data that deviates from Means for determining a part related to abnormal data in the result of comparison between the multi-valued expression data and the dictionary data, and means for comparing the result of invalidating the part related to the abnormal data. A sheet validity determining means (26) for determining whether or not the input paper sheet (10) is a valid paper sheet.