JPS646505B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a seal matching device used in a bank or the like to match a pre-registered seal impression with a seal impression on a presented slip.

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. For example, fold the slip of the seal imprint in half, overlap it on the registered seal imprint, align the two seal imprints, and then repeatedly move the seal imprint up and down to make use of the afterimage effect of the eye to determine the difference between the two seal impressions. Verifying identity.

With such primitive verification, it takes a very long time to search for the necessary seal registration form, leading to a decline in counter service. In addition, since the comparison was based on subjective visual evaluation, it required considerable skill to be able to perform an accurate comparison, and the criteria for judgment tended to vary depending on individual differences and mental states, making it extremely difficult to understand. .

Against this background, 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, although this device uses electrical processing to file the registered seal impression data, search for files, and superimpose the registered seal impression and the compared seal impression, the comparative evaluation of the two seal impressions is only a subjective visual inspection. However, the problem remains that the criteria for judgment tend to be very arbitrary.

Some attempts have also been made to find pattern matching between a registered seal imprint and a verified seal imprint through computer processing. However, as is well known, even if the seal is the same, the imprint 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 calculations for verification. The problem is that it becomes very long. Considering that the stamp pattern changes depending on the state of the stamp, there is a big problem in completely automating the verification process without human involvement.

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 so that the staff can visually judge the identity and difference between the two seal imprints. To provide a seal collation device that automatically measures, quantifies and displays the degree of partial/local overlap of the seals, and allows the staff to use this as appropriate reference information for evaluation.

Structure of the Invention In order to achieve the above object, the present invention provides a structure for simultaneously displaying a searched and extracted registered seal impression and an imaged verified seal impression so that they can be superimposed on one display, means for differentiating the display color of and further differentiating the display color of the overlapping portion of both seal impressions; frame generating means for generating and displaying a frame specifying an arbitrary partial area on the display screen; and registration. means for separately counting the number of pixels of the seal impression inside and outside the frame; means for counting the number of pixels of the seal impression to be verified separately inside and outside the frame; means for counting separately for inside and outside the frame; a calculating means for calculating the partial matching rate inside the frame and the partial matching rate outside the frame based on the outputs of these three counting means; The present invention is characterized by comprising means for displaying the inside matching rate and the outside matching rate on the display while updating them at appropriate intervals.

DESCRIPTION OF THE EMBODIMENTS FIG. 1 shows a schematic configuration of a seal verification device according to an embodiment of the present invention. The seal verification terminal device 2 according to the present invention is coupled to the storage device 1 via 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 stored in the storage device 1 as digitized registered seal impression data (binarized dot pattern), forming a seal file 1a. ing. 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 a color CRT 16 on which a seal imprint is displayed as a component on the surface of the device;
Keyboard 17 for inputting various commands to this device
It is equipped with an imaging device 4 and its reading stand A for reading the stamp to be verified. Further, the circuit system of the terminal device 2 is supervised by a control circuit 19, which performs overall timing control and the like.

First, the configuration and operation of a system for searching and extracting arbitrary registered seal imprint data from the storage device 1 and displaying it on the color CRT 16 will be explained. When an arbitrary account number is input using the keyboard 17, the input is detected by the key sense circuit 18 and transmitted to the control circuit 19.
Upon receiving this, the control circuit 19 transmits the account number to the control device 1b of the storage device 1 via the interface circuit 20. The control device 1b stores the registered seal imprint data corresponding to the received account number in the seal file 1.
a, and transmits the registered seal imprint data to the interface circuit 20 of the terminal device 2.

The control circuit 19 transfers the registered seal impression data received by the interface circuit 20 to the memory circuit 7 for temporary storage. Also, the account number input from the key sense circuit 18 is stored in the numerical data memory circuit 9.
temporarily memorized. The registered seal imprint data stored in the memory circuit 7 and the account number stored in the memory circuit 9 are read out by the color CRT control circuit 15.
Displayed on color CRT16. FIG. 2 shows an example of the display at this time. In this example, the stamp "Yamada" registered with the account number "123456" 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 table A of the imaging device 4, and
The seal imprint on the slip is located in the center of the effective reading area. In this state, when a collation command is given using the keyboard 17, the imaging system is operated 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 platform A by repeating two-dimensional scanning at high speed.
Convert to electrical signal. The output of the image pickup device 4 is signal-processed and digitized by a reading amplifier circuit 5 and an A/D conversion circuit 6, and converted into a binarized dot pattern similar to the registered seal impression data. The stamp data to be verified outputted from the A/D conversion circuit 6 is temporarily stored in the memory circuit 8.

The stamp imprint 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.
6. Therefore, as shown in FIG. 3, the color CRT 16 displays the registered seal imprint described above and the to-be-verified seal imprint read by the imaging device 4 at the same time. 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 in this way, it becomes very easy to identify the two 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 16 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, so that 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. The color CRT control circuit 15 also repeatedly reads out the contents of the memory circuits 7, 8, and 9 at predetermined intervals and displays them on the color CRT 16. 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, the operator moves the document on the reading stand A while looking at the screen of the color CRT 16, and adjusts 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 a system for generating and displaying a frame specifying an arbitrary partial area on the screen of the color CRT 16 will be explained.

FIG. 4 illustrates a state in which a frame is displayed on the color CRT 16 along with a seal impression. Further, in the display of the seal impression "Yamada" in this figure, it is assumed that the registered seal impression and the verified seal impression overlap and match as a result of the above-described operation.

The frame on the display is formed by two vertical frame lines 31, 32 and two horizontal frame lines 33, 34, and the square partial area (with diagonal lines) surrounded by these four frames is the frame. It is called within 35. These frame lines 31-34
The display signal is a color signal from the frame data generation circuit 21.
The signal is applied to the CRT control circuit 15.

The frame data generation circuit 21 includes vertical frames 31 and 32.
horizontal addresses X ₁ and X ₂ and horizontal frame lines 33 and 34
There is a latch circuit that temporarily stores the vertical addresses Y ₁ and Y ₂ of the CRT 16, respectively, and the horizontal scanning address X and vertical scanning address Y of the CRT 16 generated in the CRT control circuit 15 and the respective addresses X ₁ , X ₂ and
Y ₁ and Y ₂ are compared. And X=X ₁ , X=
The coincidence signals of X ₂ , Y=Y ₁ , and Y=Y ₂ are input to the CRT control circuit 15 as display signals S ₁ of the frame lines 31, 32, 33, and 34, respectively.

The addresses X ₁ , X ₂ , Y ₁ , and Y ₂ of the frame lines can be arbitrarily changed by operating the keyboard 17. That is, the keyboard 17 has a frame line shift key, and when the key is pressed, the control circuit 19 is activated and the address of the latch circuit in the frame data generation circuit 21 is increased or decreased.

The operator performs the above-mentioned key operations and specifies in the frame 35 a portion of the superimposed seal imprint that is desired to be compared and verified particularly precisely. In this state, when a matching rate calculation command is given using the keyboard 17, the operation is as follows.

Next, the computation of matching rate and the configuration and operation of its display system will be explained. In parallel with the operation of the seal imprint 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 is input to the AND gates 22 and 24, The verification seal imprint data is input to AND gates 23 and 25. The output S2 of the frame data generation circuit 21 is applied to the AND gates 22 and 23 as a gate signal, and the AND gates 24 and 25
The output S3 of the frame data generation circuit 21 is applied to as a gate signal.

The output S2 of the frame data generation circuit 21 is the horizontal and vertical scanning address X, which is generated by the CRT control circuit 15.
This is a signal indicating whether or not Y is within the frame 35, and when scanning addresses X and Y are within the frame 35.
S2 becomes “1”. Therefore, and gate 2
2, the pixel signals included in the frame 35 of the registered seal impression data are taken out and input to the pixel counter 10 via the OR gate 26. Similarly, the pixel signals included in the frame 35 of the seal impression data to be verified are taken out from the AND gate 23 and input to the pixel counter 11 via the OR gate 27.

The pixel counters 10 and 11 count the number of pixels within the frame 35 of the registered seal imprint data and the verified seal imprint data, respectively. That is, as described above, the seal impression data is a dot pattern that is binarized into the background portion and the seal impression portion, and the pixel counters 10 and 11 count the number of black dots (imprint pixels), respectively.

Simultaneously with this operation, the AND gate 13 performs a logical AND operation on both seal imprint data output from the OR gates 26 and 27, and the output thereof is input to the matching pixel counter 12 and counted. In other words, and gate 1
3, pixels included in the frame 35 (matching pixels) are detected in the overlapping part of both seal impressions displayed on the color CRT 16, and the number of pixels is counted by the counter 1.
It is counted as 2.

The output S3 of the frame data generation circuit 21 is a signal indicating whether or not the horizontal and vertical scanning addresses X and Y generated by the CRT control circuit 15 are outside the frame 35. When it is outside, S3 becomes “1”. In other words, the output S3 is the output S
This signal is complementary to 2.

Therefore, pixel signals outside the frame 35 of the registered seal impression data are taken out from the AND gate 24, and these pixel signals are counted by the pixel counter 10 in the same manner as described above. Similarly, pixel signals outside the frame 35 of the seal imprint data to be verified are taken out from the AND gate 25 and counted by the pixel counter 11. At the same time, the matching pixel counter 12 counts matching pixels outside the frame 35 in the overlapping portion of both seal imprint displays.

As described above, each of the counters 10, 11, and 12 counts the number of pixels within the frame and the number of pixels outside the frame in a time-sharing manner.

The matching rate calculation circuit 14 includes counters 10, 11, 1
Based on the outputs of step 2, the partial matching rate within the frame and the partial matching rate outside the frame are calculated separately in a time-sharing manner. Assuming that the number of pixels inside or outside the frame of the registered seal imprint data is A, the number of pixels inside or outside the frame of the seal impression data to be verified is B, and the number of matching pixels inside or outside the frame of both seal impressions is C, the calculated inside or outside of the frame verification The rate is 2C/(A+B)
It is. In other words, 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 counting and matching rate calculation system operates repeatedly at an appropriate cycle, and calculates the inside matching rate and the outside matching rate based on the latest stamp data to be checked stored in the memory circuit 8. The calculated in-frame matching rate and out-of-frame matching rate are controlled by the control circuit 19.
The data is stored in the numerical data memory circuit 9 while being updated at appropriate intervals. The updating cycle of this matching rate is an integral multiple of the operating cycle of the color CRT control circuit 15, and is set to a somewhat large value.

As a result, as shown in Figure 4, the color CRT1
On the display screen of 6, along with the overlapping seal impressions,
The calculated within-frame matching rate and outside-of-frame matching rate are displayed at the bottom. In this example, the matching rate within the frame is 85%, and the matching rate outside the frame is 92%. In other words, the degree of coincidence within the frame 35 of both seal impressions is somewhat worse than the degree of coincidence outside the frame 35.

Here, when the slip on the reading table 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 stamps on the display changes, the verification rate is calculated by the arithmetic circuit 14 and stored in the memory circuit 9. will also change, and the matching rate display will also change. In other words, the degree to which the two seal impressions overlap on the screen is digitized and dynamically displayed as a matching rate. Further, even if the frame 35 is changed, the matching rate changes similarly.

The operator not only sees both seal imprints on the screen, but also looks at the matching rate within the frame and the matching rate outside the frame when performing the matching, and is able to check the numerical matching rate, not just based on a subjective feeling. By referring to it, you will be able to make more appropriate matching decisions.

Note that the shape of the frame 35 is not limited to the above embodiment, and may be a frame of other shapes such as a triangle or a circle.

Effects of the Invention As explained in detail above, according to the seal matching device of the present invention, not only is it extremely easy to search and extract a registered seal impression and superimpose it on the stamp to be verified, but also it is possible to check the identity of both seal impressions. The conventional problem of determining differences only by visual subjective evaluation is resolved. In other words, it is possible to remove the mental burden on the verifier due to subjective evaluation only, and also to compare the verification rate within and outside the framework by referring to the quantified objective evaluation of any part of the seal impression. As a result, variations in the determination criteria are 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 the seal matching device according to the present invention, and FIG.
A diagram showing the registered seal imprint displayed on the CRT.
Figure 3 shows a state in which the registered seal imprint and the verified seal imprint are displayed at the same time, and Figure 4 shows a state in which the registered seal imprint and the verified seal imprint are displayed at the same time, and the matching rate within the frame and the matching rate outside the frame are also displayed. FIG. 1... Storage device, 2... Seal verification terminal device, 4
. . . Imaging device, A . . . Reading stand, 7 . . . Registered seal impression data memory circuit, 8 . ...Verified seal imprint data pixel counter, 12... Match pixel counter, 14
... Matching rate calculation circuit, 15 ... Color CRT control circuit, 16 ... Color CRT, 17 ... Keypod, 21 ... Frame data generation circuit, 35 ... Frame.

Claims (1)

[Claims] 1. A means for searching for arbitrary seal impression data from a group of digitalized seal impression data stored and registered in advance, a first storage means for temporarily storing registered seal impression data searched and extracted by this means, and a reading means. A two-dimensional imaging means for repeatedly capturing images of the stamp to be verified stamped on a sheet of paper set on a stand; 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 imprint data outputted from the means; a two-dimensional image color display means; and a registered seal imprint data of the first storage means and the registered seal imprint data of the second storage means. display control means for repeatedly reading out the seal imprint data to be verified at appropriate intervals and displaying the data in different colors on the same screen of the color display means, and further changing the display color of the overlapping portions on the display screen of both seal imprint data; a frame generation means for generating and displaying a frame specifying an arbitrary partial area on the screen; and a first means for counting the number of seal impression pixels of the registered seal impression data in the first storage means separately within the frame and outside the frame. a counting means, a second counting means for separately counting the number of seal impression pixels of the verified seal impression data in the second storage means within the frame and outside the frame; A third counting means that counts the corresponding number of overlapping pixels inside and outside the frame separately, and a partial matching rate within the frame and outside the frame based on the outputs of the first, second, and third counting means. A seal verification device comprising: calculation means for calculating a partial matching rate; and means for displaying the latest inside-frame matching rate and outside-frame matching rate obtained by the calculating means on the color display means while updating at appropriate intervals. .