JPS60134988A - Collating device of seal impression - Google Patents

Abstract

PURPOSE:To execute appropriate collating judgement by overlapping a registered seal print retrieved and extracted with a collated seal print on the same display scope to display, and measuring and quantizing the degree of overlapping of both seal prints are overlapped to display in addition to visual judgement of the difference. CONSTITUTION:When the account number is inputted through a keyboard 17, a control circuit 19 retrieves and extracts a corresponding registered seal print in a seal file 1a, and displayed on a color CTR16 through a registered seal print data memory circuit 7. When an operator sets the voucher, where a registered seal print is stamped, to a reading stand A of an image pickup device 4, it is read out, and simultaneously displayed on the color CRT16 through a collated seal print data memory circuit 8. By shifting the location of the voucher set to the reading stand A, both seal prints can be adjusted to overlap. On the other hand, registered seal print data and collated seal print data are simultaneously read out, inputted to a registered seal print data picture element counter 10 and a collated seal print data picture element counter 11, respectively and the number of picture elements is counted. At the same time, an AND of both seal prints is taken out in an AND gate 13, and counted by a coincident picture elements counter 12. According to these results, a collation ratio can be operated and displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a seal matching device used in a bank or the like to match a seal imprint registered in advance with a seal imprint on a presented document.

Conventional Structure and Problems Conventionally, financial institutions such as banks typically file a huge number of seal registration slips with contract seals stamped on them. In order to compare the seal imprint on the slip presented by the customer with the registered seal imprint, a specific item is searched and extracted from the seal registration form, and the registered seal imprint is visually compared with the verified seal imprint.

Tsumashi, fold the slip of the seal impression to be verified in half, overlap it with the registered seal impression -1-, align both seal impressions, and then repeatedly move the seal impression to be verified up and down, making use of the afterimage effect of the eye to create both impressions. Verifying the difference or identity of

With such primitive verification, it takes a very long time to search for the necessary seal registration form, which leads to a decline in counter service. Furthermore, since the comparison is based on subjective visual evaluation, it requires considerable skill to be able to perform accurate comparison, and the criteria for judgment tend to vary depending on individual differences and mental states, making them extremely vague.

Against this backdrop, various seal verification devices have been developed and put into practical use in recent years. The mainstream is a device that uses a CRT display device, which displays the registered seal imprint and the verified seal imprint on the same CRT, superimposes them, and visually evaluates and determines the difference and identity between the two. . However, this device is unable to file registered seal impression data, search files,
Although the registered seal impression and the checked seal impression are superimposed by electrical processing, the comparative evaluation of both seal impressions is strictly subjective based on visual observation, and the problem remains that the criteria for judgment tend to be very vague.

Some attempts have also been made to perform pattern matching between registered seal impressions and verified seal impressions through computer processing. However, as is well known, even if the same seal is used, the stamp pattern can vary greatly depending on the state of the seal, so it is extremely difficult to automate accurate verification using a computer, and it also takes a long time to process the verification process. The problem is that it is very long. Considering the changes in the seal imprint pattern depending on the stamping state, we can completely automate the verification judgment,
There is a big problem with no human involvement at all.

Purpose of the Invention The purpose of the present invention is to display the searched and extracted registered seal imprint and the verified seal imprint on the same display and superimpose them, thereby confirming the identity of both seal imprints.
In addition to the staff visually determining the difference, the degree of overlap between the two seal impressions is automatically measured, quantified, and displayed, and this can be used as appropriate reference information for the staff's evaluation. An object of the present invention is to provide a seal spacing device that mechanically evaluates the degree of overlap based on a certain standard and displays the evaluation results as reference information.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a structure in which a searched and extracted registered seal impression and an imaged verified seal impression are simultaneously displayed so that they can be superimposed on one display, means for differentiating the display color of the area and further differentiating the display color of the overlapping portion of both seal impressions, means for counting the number of pixels of the registered seal impression, and means for counting the number of pixels of the seal impression to be verified;
A means for counting the number of pixels in the overlapping portion of both seal impressions, a calculating means for calculating a matching rate based on the outputs of these three numerical means, and updating the latest matching rate obtained by this calculating means at appropriate intervals. means for displaying on the display while
The present invention is characterized in that it is provided with a comparison means for comparing the calculated matching rate with a predetermined reference value, and a means for displaying the comparison result by the comparison means.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 shows a schematic configuration of a seal verification device according to an embodiment of the present invention. Seal stamp verification terminal device 2 according to this invention
is coupled to the storage device 1 by a predetermined data transmission path. The storage device 1 is a device equipped with a large capacity memory such as a magnetic disk device, and includes a seal file 1a and a file control device 1b.

The registered seal impression is optically read by a predetermined imaging device, converted into an electrical signal, and digitized registered seal impression data (
It is stored in the storage device 1 as a binary dot pattern) and constitutes a seal file 1a. Each registered seal imprint data in the seal file 1a is stored in association with a unique account number.

The seal verification terminal device 2 includes the following components on the surface of the device:
It is equipped with a color CRT 16 on which the seal impression is displayed, keyboards 1 and 1 for inputting various commands to the apparatus, and an imaging device 4 and its reader for reading the seal impression to be verified. Further, the circuit system of the terminal device 20 is supervised by a control circuit 19, and overall timing control is performed.

Describe the structure and operation of the system that retrieves and extracts any registered seal imprint data from the storage device 1 and displays it on the color CRT 16. When an arbitrary account number is input using the keyboard 1, the input is sent to the key sense circuit 18. is detected and transmitted to the control circuit 19.

In response to this, the control circuit 19 controls the interface circuit 2.
The account number is sent to the storage device 10 control device 1a via o. The control device 1b searches and extracts the registered seal imprint data corresponding to the received account number from the seal stamp file 1a, and transmits the registered seal imprint data to the interface circuit 20 of the terminal device 2.
Send to.

The control circuit 19 transfers the registered seal impression data received by the interface circuit 2○ to the memory circuit 7 and temporarily stores it therein. Also, the (') seat number inputted from the key sense circuit 18 is temporarily stored in the numerical data memory circuit 9. The registered seal imprint data stored in the memory circuit 7 and the account number stored in the memory circuit 9 are stored in the color CRT control circuit. 15 and displayed on the color CRT 1e. Figure 2 shows an example of the display at this time. In this example, the registered seal ``Yamada'' with the account number 11234E56 is displayed. Here, the registered seal imprint data is displayed in red.

Next, the configuration and operation of the reading and display system for the seal imprint to be verified will be explained. The operator places the slip stamped with the stamp to be verified on the reading stand A of the imaging device 4 at the 7th mark, and places the 2nd stamp impression on the valid reading area at the medium heat.

In this state, when a verification command is given using the keyboard 17,
The imaging system operates and reading and display processing is started.

The imaging device 4 uses a self-scanning two-dimensional solid-state imaging device such as a CCD, and reads the stamp to be verified on the reading table A by repeating two-dimensional scanning at high speed, and converts it into an electrical signal.

The output of the image pickup device 4 is signal-processed and digitized by a reading amplification circuit 5 and an A/D conversion circuit 6, and can be converted into a binarized dot pattern similar to the registered seal impression data. A
The stamp data to be verified outputted from the /D conversion circuit 6 is temporarily stored in the memory circuit 8.

The stamp data to be verified stored in the memory circuit 8 is also read out by the color CRT control circuit 15 at the same time as the memory circuits 7 and 9, and is displayed on the color CRT 16. Therefore, as shown in FIG. 3, the registered seal imprint described above and the verified seal imprint read by the storage device 4 are displayed simultaneously on the color CRT 16. Here, while the display color of the registered seal imprint is red, the display color of the verified seal imprint is green, so that the portion where both seal imprints overlap is displayed in yellow.

By displaying in three colors, it becomes very easy to identify both seal impressions and the extent to which they overlap.

By the way, the position of the stamp to be verified on the display screen of the color CRT 1e changes dynamically by changing the position of the slip set on the reading stand A. In other words, reading by the imaging device 4 is performed repeatedly at high speed, and if the position of the stamp to be verified on the reading stand is shifted, it is read as it is. The contents of the verified seal imprint data memory circuit 8 are repeatedly updated at predetermined intervals, and the latest verified stamp data obtained by the imaging device 4, reading amplifier circuit 5, and A/D conversion circuit 6 is updated at predetermined intervals. This will be stored.

Still color CRT control circuit 15 and memory circuits 7, 8.9
The contents of the color CRT 16 are read out repeatedly at a predetermined period.
is displayed. Therefore, if the slip on which the stamp to be verified is affixed is displaced on the reading stand A, the position of the stamp to be verified on the screen of the color CRT 16 will be correspondingly displaced. Therefore, while looking at the color CRT 16 screen, the operator
Move the document above and adjust it so that the two displayed seal impressions completely overlap. Then, visually evaluate the identity and difference between the two seal impressions.

Next, the configuration and operation of the matching rate calculation and display system will be explained. In parallel with the operation of the display system described above, the registered seal imprint data in the memory circuit 7 and the to-be-verified seal imprint data in the memory circuit 8 are read out at the same timing, and the registered seal imprint data pixel counter 1○ and the to-be-verified seal imprint data pixel are read out at the same timing. This is input to a counter 11, and the number of pixels forming each seal impression is counted.

In other words, as mentioned above, the seal imprint data is a dot pattern that is binarized into the background part and the seal imprint part, and the pixel data is divided into several volumes.
At 0.11, the number of black dots (imprint pixels) is counted.

Simultaneously with this operation, both stamp data read from the memory circuit 7.8 are ANDed by the AND gate 13, and the output thereof is inputted to the coincident pixel counter 12 and counted.

In the case of ant game 1 and 13, pixels (matching pixels) in the overlapping portion of both seal impressions displayed on the color CRT 16 are detected, and the number of pixels is counted by the counter 12.

A matching rate calculation circuit 14 calculates a matching rate based on the outputs of the counters 10, 11, and 12. Assuming that the number of pixels of the registered seal imprint data is A, the number of pixels of the verified seal imprint data is 81, and the number of matching pixels of both seal impressions is C, the calculated matching rate is 2 C/ (A
+B). The number of pixels C in the overlapping part of both seal impressions and the arithmetic average of the number of pixels of both seal impressions (A+B)/
2 is taken as the matching rate.

The above-mentioned pixel division number and matching rate calculation system operates repeatedly and calculates the matching rate based on the latest stamp data to be checked stored in the memory circuit 8. The calculated matching rate is determined by the control circuit 19.
, the data is stored in the numerical data memory circuit 9 while being updated at appropriate intervals. The update cycle of this matching rate is
It is an integral multiple of the operation cycle of the color CRT control circuit 16, and is set to a somewhat large value.

As a result, as shown in FIG. 3, on the display screen of the color CRT 1e, both overlapping seal impressions and the calculated matching rate are displayed at the bottom thereof. In this example, the matching rate is 62 matches. Here, when the slip on the reading stand A is moved and the position of the stamp to be verified on the display screen is moved, and the degree of overlap between the two seal impressions on the display changes, the verification is calculated by the arithmetic circuit 14 and stored in the memory circuit 9. The rate also changes, and the display of the matching rate changes.

The degree to which the two seal impressions overlap on the tsai screen is digitized and displayed on Guinaminoku as a matching rate.

Further, the output (matching rate) of the matching rate calculating circuit 14 is inputted to a comparing circuit 30, and is compared with, for example, two levels of reference values.

It is assumed that 60φ and so% are set as the reference values. The comparison circuit 3o compares and evaluates the input matching rate into three levels: less than tso%, 501 or more and less than 80φ, and 80 or more. This comparison result is input to the numerical data memory circuit 9, and becomes a control signal for determining the display color of the matching rate by color ○RT1e. For example, if the matching rate is less than 60%, it is displayed in red, if the matching rate is greater than or equal to so% and less than 8 degrees, it is displayed in yellow, and if the matching rate is 80φ or more, it is displayed in blue. Therefore, in the example in Figure 3, "52%
” is displayed in yellow.

The operator not only checks the display of both seal impressions on the screen, but also the matching rate and display color that are displayed at the same time. By referring to the information and the mechanical evaluation thereof, more appropriate matching judgments can be made.

Note that the comparative evaluation of matching rates is not limited to the above embodiment, and may be divided into more narrow classes. However, the display of the comparison results is not limited to the above embodiment, and various display methods can be adopted.

As described in detail in 2. Effects of the Invention, the seal verification device of the present invention not only makes it extremely easy to search and extract a registered seal impression and superimpose it on a verified seal impression, but also allows for the comparison of both seal impressions. The conventional problem of determining identity and difference only by visual subjective evaluation is resolved.

It is possible to remove the mental burden on the verifier due to subjective evaluation alone, and by referring to the quantified verification degree and its mechanical and objective evaluation, the variation in judgment criteria is reduced and more appropriate Verification decisions can be made more quickly.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a seal verification device according to the present invention, FIG. 2 is a diagram showing a registered seal imprint displayed on the CRT of the same device, and FIG. It is a diagram showing a state in which the seal imprints to be verified are displayed at the same time and the matching rate is displayed.
4...Imaging device, A...Reading stand, 7...
Registered seal imprint data memory circuit, 8... Verified seal imprint data memory circuit, 9... Numerical data memory circuit, 10... Recorded seal imprint data pixel counter, 11.
...Verified seal imprint data pixel counter, 12...
-Several pixel counter, 14 matching rate calculation circuit, 15...
...Color CRT control [r-jl path, 16...Color CRT, 17...Keyboard, 30...
Comparison circuit.

Claims (2)

[Claims] (1) means for searching for arbitrary seal imprint data from a group of digitalized seal imprint data stored and registered in advance, and a first storage means for temporarily storing registered seal imprint data searched and extracted by this means; , a two-dimensional imaging means for repeatedly capturing an image of a stamp to be verified stamped on a sheet of paper set on a reading table at appropriate intervals; a signal processing means for obtaining digitized data of the stamp to be verified from the output of the imaging means; a second storage means for temporarily storing the latest checked seal impression data outputted from the signal processing means; a two-dimensional color display means; registered seal impression data of the first storage means and the second
Repeatedly reading out the stamp imprint to be verified from the storage means at appropriate data intervals and displaying it in different colors on the same screen of the color display means;
and a display control means for further differentiating the display color of the overlapping portions on the display screen of both seal impression data, and a first numerical number means for increasing the number of seal impression pixels of the registered seal impression data in the first storage means to 4. and a second counting means for counting the number of seal impression pixels of the seal impression data to be verified in the second storage means, and counting the number of overlapping pixels corresponding to the overlapping portion of the two seal impression data on the display screen. a third counting means; a calculating means for calculating a matching rate based on the outputs of the second and third counting means; and means for displaying the latest matching rate obtained by the calculating means on the color display means while updating it at appropriate intervals; A seal verification device comprising a comparison means for comparing a calculated verification rate indicated by - with a predetermined reference value, and a means for displaying a comparison result by the comparison means. (2) The seal verification device according to claim 1, wherein the comparison result of the comparison means is displayed by changing the color of the verification rate display.