JPS6249479A - Seal print pattern collating device - Google Patents

Abstract

PURPOSE:To lighten burden of a seal print collater and reduce fatigue due to looking with the eye by changing background color of a display unit according to the result of judgement by a collating device. CONSTITUTION:A seal print to be examined is read by a reading section 1 and features such as external form etc. are extracted to a feature extracting section 4 from the read seal print pattern P2 to be collated. On the other hand, features such as external form etc. are extracted by a feature extracting section 3 from a registered seal print pattern P1 registered beforehand, and compared with the result of extraction from the feature extracting section 4 by a feature comparing section 5. When judged as 'conformable', background color of the display picture is made, for instance, green, and the registered seal print pattern P1 and seal print pattern to be collated P2 are displayed side by side in red. When judged as 'discordant', red, and the registered seal print pattern P1 and seal print pattern to be collated P2 are displayed side by side in, for instance, green.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a seal imprint pattern matching device that determines whether seal imprints match or do not match.

(Prior Art) A conventional seal imprint pattern matching device moves and rotates a seal imprint pattern to be verified read by a reading unit in a position matching unit, and overlaps it with a registered seal imprint pattern registered in advance. The overlapping pattern was displayed on a display device such as a CRT display, and the seal imprint checker visually checked the degree of overlapping to check whether the checked seal impression was the same as the registered seal impression. . Therefore, the person who verifies the seal imprint has to constantly look closely at the display device, which has the disadvantage of causing great physical and mental fatigue.

As an example of solving this drawback, JP-A-52-15
As in Publication No. 5019, both video signals of the registered seal imprint pattern and the to-be-verified seal imprint pattern are compared and verified, and when the two video signals match, a notification means such as an indicator lamp that lights up indicates that the two video signals match. If it is determined that the two video signals are different, the two video signals are displayed side by side or overlappingly on the cathode ray tube.

Therefore, if the verification device determines that the two video signals are the same, the seal imprint verification person does not need to perform a visual comparison. Since the comparison and verification are performed visually, the burden on the seal imprint verification person and the fatigue caused by visual verification can be reduced.

(Problems to be Solved by the Invention) However, in practice, since the registered seal imprint pattern and the to-be-verified seal imprint pattern are stamped separately, there are various issues such as how to apply vermilion during stamping, the pressure during stamping, etc. Because of the differences in various conditions, it is almost impossible for patterns obtained using the same seal to be exactly the same. Therefore, even if you try to classify cases into two types, cases where they are exactly the same and cases where they are not, most of the cases will be the latter, that is, cases where they are not, so in reality, seal imprint verifiers always use visual inspection. Therefore, we are forced to compare and match. Therefore, even if they are not exactly the same, it is more practical to consider them to be the same if the difference between the two seal imprint patterns is slight and is caused by a difference in stamping conditions.

However, in such a case, the person who verifies the seal imprints often wants to visually check whether the difference between the two seal imprint patterns is acceptable or not, and is concerned about just being informed that there is a match. In other words, if the comparison results are classified into two types, ``when they match'' and ``when they are recognized as different,'' as in the conventional device, and when there is a ``match,'' a match is notified. This method has the disadvantage that it cannot substantially reduce the burden on the person who verifies seals, or it cannot alleviate the concerns of the person who verifies the seal imprint.

The present invention is intended to solve these problems, and an object of the present invention is to provide a seal imprint pattern matching device that does not make a seal imprint matching person feel anxious and that substantially reduces the burden on the seal impression matching person. .

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a reading unit for reading a seal imprint to be verified, and a registered seal imprint that is registered in advance with a pattern of the imprint to be verified read by the reading unit. a position matching section that performs position matching with the pattern; a verification comparison section that performs a comparison comparison between the two matched seal imprint patterns; and a determination as to whether the two seal imprint patterns match, mismatch, or cannot be matched based on the results of this comparison. a match determination unit that instructs readjustment of the position matching unit, and a display unit that displays on a screen at least one of the determination results by the match determination unit, both seal imprint patterns, and the seal pattern whose position has been aligned by the position alignment unit. In the seal imprint pattern matching device, the display unit changes at least one of the background color of the display screen, the color of both seal imprint patterns, and the color of the positionally matched seal imprint pattern according to the determination result by the matching determination unit. It is characterized by

(Operation) According to the present invention having the above configuration, the following operations are performed in the display section. First, in accordance with the result determined by the match determining section, the content of the determination result, both seal imprint patterns, and at least one of the seal imprint patterns whose position has been aligned by the position matching section are displayed on the display screen of the display section.

In addition, the display section changes at least one of the background color of the display screen, the color of both seal imprint patterns, and the color of the positionally aligned seal imprint pattern according to the determination result, and provides information to the seal imprint verification person through the color. Communicate judgment results intuitively.

Therefore, the present invention provides a seal imprint pattern matching device that can solve the above-mentioned problems, and that can reduce the burden on the stamp matching person and reduce the fatigue caused by visual inspection, without making the person feeling anxious. Can be provided.

(Example) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 is a block diagram showing an embodiment of the present invention. In the figure, 1 is a reading unit that reads the seal impression to be examined, P2 is a pattern of the seal imprint to be verified read by the reading unit 1, and 2 is a block diagram to be verified. A position alignment unit that moves and rotates the stamp pattern 2, P
l is a registered seal imprint pattern of a seal etc. registered in advance, 3
, 4 is a feature extraction unit that extracts features such as external shape from the registered seal imprint pattern P1 and the to-be-verified seal imprint pattern P2, respectively;
6 is a feature comparison unit that compares the extraction results obtained from the feature extraction units 3 and 4; 6 is a matching comparison unit that performs pattern matching of both patterns to check the degree of matching; 7 is a matching comparison unit 6
8 is a display unit that displays the comparison seal imprint pattern P2, the registered seal imprint pattern P1, and other determination results.

Next, the operation of this embodiment will be explained.

First, the reading section 1 reads the seal imprint to be tested, and the feature extraction section 4 extracts features such as external shape from the read seal imprint pattern P2 to be verified. On the other hand, a feature extraction unit 3 extracts features such as external shape from the registered seal imprint pattern P1 registered in advance, and compares the extracted features with the extraction results from the feature extraction unit 4 to a feature comparison unit 5.
Compare in. As a result of the comparison, if even one of the features such as the external shape is different, the operations of the position matching section 2 and the matching comparison section 6 are stopped, and a "matching mismatch J" judgment is made via the matching judgment section 7. If all the features are not different, the position matching section 2 moves and rotates the stamp imprint pattern P2 to be compared so that it overlaps the registered stamp pattern P1, and the matching and comparison section 6 compares the patterns of both patterns. Matching is performed to check the degree of coincidence, and a determination is made in the coincidence determining section 7. If necessary, the results are fed back to the position matching section 2, and after movement and rotation are performed in a direction that improves the degree of coincidence. , check the degree of matching again in the matching comparison section 6,
By repeating these steps, the maximum value of the degree of coincidence (hereinafter abbreviated as "maximum political change") is obtained, and the match determination unit 7 compares the maximum value of -political change with a predetermined threshold value.

Then, in the match determination unit 7, if the maximum value of the degree of matching is equal to or greater than the match determination threshold, it is determined as a "verification match", and if the maximum value of -political change is less than the discrepancy determination threshold, it is determined as a "match mismatch". judge. - If the maximum value of political change is less than the match determination threshold and greater than the mismatch determination threshold, it is determined that "matching is impossible".

The registered seal imprint pattern P1 and the to-be-verified seal imprint pattern P2 are displayed on the display unit 8 in a display mode determined corresponding to these determination results.
etc. will be displayed. Next, the display mode determined according to the determination result will be explained.

According to the results of experiments using seal impression patterns read at a reading resolution of 8 dots/mm, the maximum political change between seal impression patterns obtained from the same seal is at least 70%.

In addition, the maximum change in seal impression patterns obtained from different seals is even in the case of quite similar seals,
It was less than 90% at most.

Therefore, if the match determination threshold is set to 90%, there is almost no possibility that a pair of seal imprint patterns obtained from different seal stamps will be erroneously determined to be a "verification match." The main purpose of the display at that time is to convey to the seal imprint matcher that "the matching device has determined that they match" and to have the seal imprint matcher confirm that the two seal imprint patterns match. The purpose is to display both the registered and verified seal impression patterns.

Therefore, a preferable display mode when it is determined that there is a "verification match" is as shown in FIG. It will be displayed. By doing this, even if the seal imprint checker is not looking closely at the display screen,
Since the area of the background color is overwhelmingly larger than the area of the stamp pattern, the green background color catches the eye first, so you can instantly and easily know that the matching device has determined that there is a match. be able to. Furthermore, since green corresponds to a safety signal in a traffic signal, it is convenient for intuitively conveying a "coincidence determination." ′ Therefore, the seal imprint matcher only needs to compare and match both seal imprint patterns after obtaining the preliminary information that ``the matching device has determined that they match,'' since the detailed comparison has already been confirmed by the matching device. Because there is such a thing, there is no need to pay too much attention to the details; rather, you can just compare or confirm the rough impressions. Therefore, there is less physical fatigue such as eye strain.Furthermore, since the user can check the results with his own eyes, he does not feel as anxious as he would if the judgment results were left to a machine. Although not shown in the diagram, numerical information such as the maximum match percentage and "verification match J"
There is no problem in displaying character information such as , etc., as auxiliary information for determining the seal imprint verification person.

Next, if the mismatch determination threshold is set to 70%, there is almost no possibility that a pair of seal imprint patterns obtained from the same seal stamp will be erroneously determined as "matching mismatch." Furthermore, there is almost no risk of misjudgment in the case of "verification mismatch" due to differences in features such as external shape and external dimensions. Therefore, the main purpose of the display in the case of "verification mismatch" is to convey to the seal imprint verifier that "the verification device has determined that there is a discrepancy."
This is to display both the registered and verified seal imprint patterns so that the person checking the imprint can confirm that the two seal imprint patterns are different.

Therefore, a preferable display mode when it is determined that there is a "verification mismatch" is to set the background color of the display screen to red, for example, as shown in FIG.
2 are displayed side by side in green, for example. By doing this, even if the seal imprint checker is not looking closely at the display screen, the area of the background color is overwhelmingly larger than the area of the seal imprint pattern, so the red background color catches the eye first. Therefore, it is possible to immediately and easily know that "the matching device has determined that there is a mismatch." Furthermore, since the color red corresponds to a danger signal in a traffic signal, it is convenient for intuitively conveying a "judgment of inconsistency." Therefore, the person who verifies the seal imprints only needs to obtain the preliminary information that ``the collation device has determined that the two do not match,'' and then confirm that the two seal imprint patterns are different, so that comparison and verification can be easily performed.

In addition, a more suitable display mode when it is determined that there is a "matching mismatch" is based on the basis information (hereinafter referred to as D
(abbreviated as T), that is, "shape mismatch".

"Dimension mismatch", "Maximum matching degree is too low (XX%)"
etc. are displayed together. By doing this, in the case of ``shape mismatch,'' the seal imprint checker can simply check the difference in the external shape (round, square, or oval) of both seal imprint patterns, and in the case of ``size mismatch,'' , simply check the difference in the external dimensions of both seal imprint patterns.Also,
In the case of "maximum - political change is too low (xx%)", all you have to do is find the difference between the two seal impression patterns. By the way, in this case, in order to easily find out the difference between the two seal imprint patterns, both the registered and verified seal imprint patterns PL,
In addition to P2, it may be more convenient to display the third pattern P3 side by side. This third pattern P3 includes 1, for example, the registered seal imprint pattern P1 and the to-be-verified seal imprint pattern P.
2, or a pattern in which the registered seal imprint pattern P1 is in green and the to-be-verified seal imprint pattern P2 is in yellow can be used.

Next, if the maximum degree of matching is less than 90% and more than 70%, it is determined that "verification is impossible" and the result is left to the comparative judgment of the seal imprint verifier. This happens even though the pattern pairs are obtained from the same seal, the maximum degree of matching is 90% due to differences in stamping conditions.
This is a case where the maximum matching degree is 70% or more because the pattern pair is a similar seal stamp even though the pattern pair was obtained from a different seal stamp. Therefore, the main purpose of the display when "verification is not possible" is to convey to the seal imprint verifier that "the verification device cannot make a determination, so please perform a visual verification." The goal is to display sufficient patterns.

Therefore, the preferred display mode when it is determined that "verification is not possible" is as shown in FIG. However, a third pattern P3 obtained from both seal impression patterns is also displayed side by side. By doing this, even if the seal imprint checker is not looking closely at the display screen, the yellow background color will catch his eye first, so ``the checker is asking for a close look because it cannot make a judgment.'' You can instantly and easily know that. Furthermore, since yellow corresponds to a caution signal in a traffic signal, it is convenient for intuitively conveying "unmatchable".

Therefore, the person who verified the seal imprint said, ``The verification device cannot make a determination.''
After obtaining this preliminary information, that is, the characteristics such as external shape and external dimensions match, but the maximum degree of matching is a mediocre value, the two seal imprint patterns are compared and verified. This may be due to chipping, fading, or staining of the pattern due to poor stamping, resulting in a decrease in the highest degree of matching even though the stamps are the same, or because the pattern pair is obtained from different stamps but is similar to the pattern pair. All you need to do is to focus on determining whether it is the one with the highest degree of matching, and if it is determined to be the former, perform ``verification match determination'', and if the latter is determined, ``verification non-match determination''. Just put it down. In addition, the third pattern P3 in the case where it is determined that "verification is impossible" is, for example, a pattern of a mismatched part when the registered seal imprint pattern P1 and the to-be-verified seal imprint pattern P2 are superimposed, or a pattern that matches the registered seal imprint pattern P1. Needless to say, a pattern convenient for various known verification comparisons may be used, such as a pattern in which the seal imprint pattern P2 to be verified is green and yellow is superimposed. In addition, in the first embodiment, the meaning of the traffic signal is that green is used as the background color when a "verification match" is determined, red is used when a "verification mismatch" is determined, and yellow is used when a "verification is not possible" is determined. We have explained the case of a combination of colors that correspond to the content, but the color that is said to psychologically give a sense of security when it is determined that there is a "match match", and the color that is said to give a psychological sense of security when it is determined that there is a "match mismatch". Colors that are said to cause anxiety,
(It is also acceptable to use other color combinations, such as using colors that are known to psychologically alert people when it is determined that "matching is impossible.")

Further, in the first embodiment, a color display device is used as the display device and the background color is changed to green, red, and yellow according to the determination result. However, a monochrome display device is used as the display device. You can also do that. In other words, when using a monochrome display device as a display device, for example, as shown in FIG.
) as shown in Figure 3 (B )
As shown, the background color is white (high brightness), and both the registered and verified seal impression patterns PL and P2 are displayed side by side in black (low brightness). If it is determined that "verification is not possible", the display screen may be moved to the left or center, for example, as shown in FIG. 3(C).

Divided into three areas on the right, the registered seal imprint pattern P1 is displayed in white (high brightness) with the background color of the left area black (low brightness), and the background color of the center area is white (high brightness) to be compared. The seal impression pattern P2 is displayed in black (low brightness), the background color of the right area is set to black (low brightness), and the registered/verified both seal impression patterns PL, a third pattern P3 obtained from P2, for example, the both seal impression patterns, are displayed. If the patterns of the mismatched portions when superimposed are displayed in white (high brightness), an effect similar to that of the first embodiment can be obtained. Alternatively, if it is determined that "matching is impossible", a method of setting the background color to gray (medium brightness) may be considered.

(Effects of the Invention) As described above in detail, according to the present invention, the background color of the display device is made different depending on the judgment result by the verification device, so that the seal imprint verification person can look closely at the display device. Even if you are not doing so, you can know the judgment result by the verification device just by looking at it from the side while doing other work such as processing slips.

Furthermore, since it is possible to know what the next item to focus on is based on the background color, it is possible to reduce the burden on the person checking the seal imprint and the fatigue caused by visual inspection.

Furthermore, even if the judgment result by the matching device is almost certain, this will be communicated by the background color and both seal imprint patterns will be presented for confirmation. The sense of uneasiness can be removed, and since the matters to be confirmed are clear based on the background color, the burden on the seal imprint verifier required for this confirmation is light. Also.

By selecting, as the background color, a color that is psychologically known to give a sense of safety, a color that is said to give a sense of danger, etc., it becomes easier to make a comparison judgment intuitively.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention, FIG. 2 is a diagram showing an example of a display mode in this embodiment, and FIG. 3 is a diagram showing an example of a display mode in another embodiment of the present invention. . 1... Reading section, 2... Position matching section, 3.4
... Feature extraction section, 5. Feature comparison section, 6. Verification comparison section, 7. Match determination section, 8. Display section, Pl.. Registered seal imprint pattern, P2.. Seal imprint pattern to be verified, P3...Third pattern.

Claims (1)

[Scope of Claims] A reading unit that reads a seal imprint to be verified; a position matching unit that aligns the positions of the imprint pattern to be verified read by the reading unit and a registered seal imprint pattern that has been registered in advance; a matching comparison unit that performs a comparison of the seal imprint patterns; a match determination unit that determines whether the two seal imprint patterns match, mismatch, or cannot be matched according to the result of the comparison, and instructs readjustment of the position matching unit; A seal imprint pattern matching device comprising a display unit that displays on a screen at least one of the judgment results by the match judgment unit, both seal imprint patterns, and the seal imprint patterns whose positions have been aligned by the position matching unit, wherein the display unit is configured to perform the match judgment. 1. A seal imprint pattern collation device, characterized in that at least one of a background color of a display screen, a color of both seal imprint patterns, and a color of the positionally aligned seal imprint pattern is changed according to a determination result by a department.