JP5439894B2 - Seal verification device and seal verification method - Google Patents

Description

  The present invention relates to a seal stamp verification apparatus and a seal stamp verification method for verifying a registration mark registered in advance in a system and a seal imprinted in a stamp column on a form.

  The seal stamp collation apparatus images an imprint (hereinafter referred to as “verified seal stamp”) to be collated with an image reading apparatus or the like to obtain image data (hereinafter referred to as “collation stamp image data”). Further, the seal stamp collation apparatus takes out data (hereinafter referred to as “registered seal image data”) obtained by imaging a corresponding seal stamp (hereinafter referred to as “registered seal image”) registered in advance from the database. The seal collation apparatus adjusts the inclination and position of both images (“collation image” and “registration seal image”) and displays both images superimposed. The operator confirms the displayed image. Conventionally, there is a mechanism for assisting an operator in finding the difference between both images in this confirmation.

  For example, in the technology disclosed in Patent Document 1, thinning processing is performed on both images to absorb a difference in line width due to the force at the time of stamping.

JP 2002-245459 A

  However, there are many cases where the line segment of the verification mark image cannot be obtained clearly. If the line segment cannot be obtained correctly, an effective thinned image cannot be created.

  In addition, there is a general method in which the ratio of the area of the overlapping portion between the verification mark image and the registration mark image is displayed numerically. However, since the imprinted stamp differs to some extent depending on the magnitude and direction of the force at the time of imprinting, the difference between the magnitude and direction of the force at the time of imprinting and minor imprints (what is a normal mark) There is a problem that it is difficult to distinguish the difference caused by the imprinting of the (different mark). In addition, when the difference between the verification seal image and the registered seal image is small, there is a problem that the difference is overlooked.

  Therefore, the present invention has been made in view of the above problems, and the object of the present invention is that a difference caused by the magnitude and direction of force at the time of stamping and a slight mark are stamped. It is to provide a technique capable of distinguishing from the difference that occurs.

  In order to solve the above problem, according to one aspect of the present invention, the verification mark is registered with the registration mark by comparing the registered mark image data registered in advance with the verification mark image data on which the verification mark is stamped. A seal stamp collating apparatus for determining whether or not the same mark is used, the collating image data storing unit storing the matching image data and the matching image data managing the matching image data stored in the matching image data storing unit Image data management unit, registration stamp image data storage unit for storing registration stamp image data, registration stamp image data management unit for managing registration stamp image data stored in the registration stamp image data storage unit, and verification image data storage The image data for collation is acquired from the image data management unit via the image data management unit, the image data for collation is extracted from the image data for collation acquired, and the image data for registration and the image data for registration are extracted. The center pixel and the other image specified by the corresponding coordinates among the pixels constituting one image in the seal seal control unit, the verification seal image data and the registration seal image data superimposed by the seal verification control unit And an error image determination assisting unit that compares a center pixel specified by corresponding coordinates among the pixels constituting the pixel and an adjacent peripheral pixel of the center pixel.

  The error image determination auxiliary unit is a pixel in which one central pixel has a predetermined pixel value, and if there is no pixel having a predetermined pixel value in the other central pixel or an adjacent surrounding pixel, an error is detected in the corresponding pixel. In other cases, it may be determined that the corresponding pixels match.

  The error image determination assisting unit may generate error image data in which the corresponding pixel determined to have an error and the corresponding pixel determined to match are set as different pixel values. The seal verification control unit may output the error image data to the display unit.

  The seal collation control unit determines whether or not there is an error of a predetermined amount or more for each region obtained by dividing the error image with respect to the pixel value set in the error image data, and determines that there is an error of a predetermined amount or more. The region may be determined as an error region. The seal stamp verification control unit may output information for specifying the error region to the display unit.

  Further, according to another aspect of the present invention, whether the verification mark is the same as the registration mark by comparing the registered mark image data registered in advance with the verification mark image data on which the verification mark is stamped. A verification image data storage unit that stores the verification image data, a verification image data management unit that manages the verification image data stored in the verification image data storage unit, and registered seal image data A seal stamp matching method by a stamp stamp matching apparatus, comprising: a registered stamp image data storage section to be stored; and a registered stamp image data management section for managing the registered stamp image data stored in the registered stamp image data storage section. Obtains image data for collation from the image data storage unit for collation via the image data management unit for collation, extracts the collation image data from the obtained image data for collation, and extracts the collation image Among the pixels constituting one image in the verification seal image data and the registration seal image data superimposed by the seal verification control unit by the error image determination auxiliary unit. Comparing the center pixel designated by the corresponding coordinates with the center pixel designated by the corresponding coordinates among the pixels constituting the other image and the neighboring surrounding pixels of the center pixel. A seal verification method is provided.

  As described above, according to the present invention, it is possible to provide a technique capable of distinguishing between an error caused by the magnitude and direction of a force at the time of stamping and an error caused by imprinting a slight mark. Can do.

It is a figure which shows the function structure of the general seal stamp collation apparatus applicable to this embodiment. It is a flowchart which shows the flow of the process which the general seal stamp collation apparatus applicable to this embodiment performs. It is a figure which shows an example of the image for collation. It is a figure which shows an example of a collation stamp image. It is a figure which shows an example of the difference extraction result calculated when the collation mark is normal. It is a figure which shows an example of the difference extraction result calculated when there exists an error in a collation mark. It is a figure which shows the example of a difference extraction image when the imprint of a collation mark is not clear, (a) is when the imprint of a collation mark is uneven, (b) is when the imprint of a collation mark is thin, c) shows a case where the imprint of the verification mark is thick. It is a figure which shows another example of the difference extraction result calculated when there exists an error in a collation mark. It is a figure which shows the function structure of the seal stamp collation apparatus which concerns on this embodiment. It is a figure which shows the combination considered as the case where the "error" has arisen in the corresponding pixel, and the corresponding pixel is "matching". It is a flowchart which shows the flow of the process which the seal stamp collation apparatus which concerns on this embodiment performs. It is a figure which shows an example of the error image produced by the seal collation apparatus which concerns on this embodiment. It is a figure which shows the error area | region determined by the seal stamp collation apparatus which concerns on this embodiment. It is a figure which shows the error area | region specified by the narrower range by the seal stamp collation apparatus which concerns on this embodiment.

  Exemplary embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

<General techniques applicable to this embodiment>
[Description of configuration]
FIG. 1 is a diagram showing a functional configuration of a general seal collation apparatus that can be applied to the present embodiment. As shown in FIG. 1, a general seal collation apparatus 10 ′ applicable to the present embodiment includes a seal collation control unit 100 ′, a registered seal image data management unit 200, a registered seal image data storage unit 210, and the like. A collation image data management unit 300, a collation image data storage unit 310, and a form reading unit 400 are provided. The seal collation control unit 100 ′ determines whether or not the collation mark is the same as the registration mark by collating the registered stamp image data registered in advance with the collation mark image data on which the collation mark is stamped. To do.

  The registered stamp image data management unit 200 manages registered stamp image data. That is, the registered stamp image data management unit 200 accepts registration of the registered stamp image data, stores it in the registered stamp image data storage unit 210, and from the registered stamp image data storage unit 210 in accordance with an instruction from the seal stamp matching control unit 100 ′. The registered seal image data is read out and output to the seal verification control unit 100 ′. The registered image data management unit 200 includes, for example, an input device such as a scanner, a CPU (Central Processing Unit), and the like. For example, the input device reads the registered image and acquires the registered image data. The image data is stored in the image data storage unit 210. In addition, the function of the registered seal image data management unit 200 is realized when the CPU executes a program stored in a memory such as a RAM (Random Access Memory) existing in the seal collation apparatus 10 '. The registered seal image data management unit 200 may be configured by a communication device or the like, and may receive registration seal image data acquired by an input device provided outside the seal collation device 10 'by the communication device.

  The registered stamp image data storage unit 210 stores registered stamp image data. When the registered seal image data is input from the registered seal image data management unit 200, the registered seal image data storage unit 210 stores the input registered seal image data. Further, in response to an instruction from the registered stamp image data management unit 200, the stored registered image data is output to the registered stamp image data management unit 200. The registered seal image data storage unit 210 is configured by, for example, an HDD (Hard Disk Drive).

  The collation image data management unit 300 manages collation image data. That is, when the collation image data is input from the form reading unit 400, the collation image data management unit 300 stores the input collation image data in the collation image data storage unit 310 and the seal collation control unit 100. In response to an instruction from ', the verification image data storage unit 310 reads the verification image data and outputs it to the seal verification control unit 100'. The collation image data management unit 300 is constituted by, for example, a CPU, and the function is realized by the CPU executing a program stored in a memory such as a RAM existing in the seal collation apparatus 10 '.

  The collation image data storage unit 310 stores collation image data. When the verification image data is input from the verification image data management unit 300, the verification image data storage unit 310 stores the input verification image data. Further, in response to an instruction from the verification image data management unit 300, the stored verification image data is output to the verification image data management unit 300. The verification image data storage unit 310 is configured by, for example, an HDD.

  The form reading unit 400 acquires collation image data. That is, the form reading unit 400 acquires the collation image data and outputs it to the collation image data management unit 300. The form reading unit 400 includes, for example, an input device such as a scanner. For example, when the input device reads the form, the image reading unit 400 acquires collation image data and outputs it to the collation image data management unit 300. The method by which the form reading unit 400 acquires the image data for verification is not particularly limited, and it is possible to acquire the image data for verification from other than the form that has been stamped with the verification mark that needs to be verified. Also good.

  The seal stamp collation control unit 100 ′ performs collation processing by controlling each functional block in the seal stamp collating apparatus 10 ′. Specifically, the seal stamp matching control unit 100 ′ matches the matching stamp image data with the registered stamp image data. When performing the collation, the seal collation control unit 100 ′ outputs an instruction indicating that collation image data is output to the collation image data management unit 300, and the collation image input from the collation image data management unit 300. The verification seal image data is obtained by extracting the verification seal image data from the data. That is, the seal collation control unit 100 ′ acquires collation image data from the collation image data storage unit 310 via the collation image data management unit 300. Also, the seal collation control unit 100 ′ outputs an instruction indicating that the registered stamp image data is to be output to the registered stamp image data management unit 200, and accepts input of the registered stamp image data from the registration stamp image data management unit 200. To obtain registered seal image data. That is, the seal collation control unit 100 ′ acquires registration stamp image data from the registration stamp image data storage unit 210 via the registration stamp image data management unit 200.

  The seal verification control unit 100 ′ calculates the difference amount by superimposing the acquired verification seal image data and the registered seal image data, and determines the calculated difference amount so that the verification mark and the registration mark are the same. It is determined whether it exists (whether the collation mark is normal) or different (whether there is an error in the collation mark). The seal collation control unit 100 ′ is configured by, for example, a CPU, and the function is realized by the CPU executing a program stored in a memory such as a RAM existing in the seal stamp collation apparatus 10 ′.

[Description of operation]
Next, FIG. 2 shows an outline of processing executed by a general stamp verification apparatus that can be applied to the present embodiment. FIG. 2 is a flowchart showing a flow of processing executed by a general stamp verification apparatus that can be applied to the present embodiment.

  In step S <b> 10, the seal collation control unit 100 ′ controls the collation image data management unit 300 and acquires the collation image data acquired by the collation image data management unit 300 from the form reading unit 400. The form reading unit 400 scans the verification image and acquires verification image data.

  An example of a collation image to be scanned is shown in FIG. FIG. 3 is a diagram illustrating an example of a collation image. In step S20, the seal collation control unit 100 ′, based on the coordinate position on the form (collation image 311) and the like, from the collation image 311 into the imprint image (for example, within the rectangular frame of “Seal” shown in FIG. 3). Are extracted (extraction of collation mark image data). FIG. 4 shows an example of the cut out seal image (check image). FIG. 4 is a diagram illustrating an example of the collation mark image. The verification mark image 312 (312a) shown in FIG. 4 is an image in which a normal verification mark (the same verification mark as the registration mark) is stamped.

  In step S <b> 30, the seal collation control unit 100 ′ controls the registered seal image data management unit 200 to acquire registered seal image data (registered seal image data). When the registered seal image data and the account number are stored in association with each other in the registered seal image data storage unit 210, for example, the seal collation control unit 100 ′ designates an account number and selects a desired registered seal image. Data can be acquired from the registered stamp image data management unit 200. The account number designated at this time is acquired, for example, by the seal collation control unit 100 ′ extracting the account number from the read data read from the “account number” column of the collation image 311 by the form reading unit 400. The

  In step S <b> 40, the seal stamp matching control unit 100 ′ determines the orientation / position of the registered seal image in a state where the overlapping portion between the registered seal image and the verification seal image is large while changing the orientation of the registered seal image. The overlapping portion means a portion where the pixel values are equal between the pixels constituting the corresponding registered seal image and the pixels constituting the verification seal image. The pixel value is a value indicating the color and brightness of the pixel. Here, the seal collation control unit 100 ′ changes the orientation of the registered seal image, but may also change the orientation of the verification seal image. In step S50, the images superimposed in step S40 are compared with each other, and a difference value of pixel values between corresponding pixels is calculated. An image obtained by arranging the calculated difference value at the coordinate position corresponding to each pixel is defined as a difference extracted image.

  FIG. 5 is a diagram illustrating an example of a difference extraction result calculated when the collation mark is normal. As illustrated in FIG. 5, the seal stamp collation apparatus 10 ′ acquires a difference extraction image 511 (511 a) as a difference extraction result between the registration mark image 212 and the collation mark image (normal mark) 312 (312 a). In FIG. 5, when a pixel of one image is black and a corresponding pixel of the other image is white, the pixel is shown in black as a pixel having a difference value. In the example shown in FIG. 5, since the collation mark is normal (the collation mark is clear and the same mark as the registration mark), there are almost no pixels having a difference value.

  FIG. 6 is a diagram illustrating an example of the difference extraction result calculated when there is an error in the collation mark. As illustrated in FIG. 6, the seal collation apparatus 10 ′ acquires a difference extraction image 511 (511 b) as a difference extraction result between the registration mark image 212 and the collation stamp image (mark with an error) 312 (312 b). In the example shown in FIG. 6, since there is an error in the collation mark (since the collation mark is different from the registration mark), there are many pixels having difference values.

  In step S60, the seal collation control unit 100 'aggregates the difference values (difference amounts) calculated in step S50, and determines whether or not the collation mark is the same mark as the registration mark. For example, the seal collation control unit 100 ′ accumulates the number of pixels having a difference value, and determines that the marks are the same if the number of pixels obtained by the accumulation is equal to or less than a predetermined threshold Thr1. For example, the seal collation control unit 100 ′ may determine that a pixel having a difference value other than “0” has a difference value, or determines that a pixel having a difference value larger than the threshold value Thr2 has a difference value. May be. Here, it is assumed that the pixel value can take any one of “0 (white)” and “1 (black)”, and a pixel having a difference value other than “0” has a difference value. I will decide. These threshold values Thr1, Thr2, etc. are assumed to be stored in a memory such as a RAM existing in the seal collator 10 ', for example.

[Summary of general seal verification devices applicable to this embodiment]
Although a general seal stamp verification apparatus applicable to the present embodiment has been described, the imprint of the verification stamp actually stamped is not always clear, and there are often many differences between the verification mark and the registration mark. Is detected. Three examples are shown in FIG. FIG. 7 is a diagram illustrating an example of a difference extraction image when the imprint of the collation mark is not clear. FIG. 7A illustrates a case where the imprint of the collation mark is uneven, and FIG. When the mark imprint is thin, FIG. 7C shows the case where the check mark imprint is thick.

  FIG. 7A shows a difference extraction image 511 (511c) between the registration seal image 212 and the verification seal image (imprint with unevenness) 312 (312c). FIG. 7B shows a difference extraction image 511 (511d) between the registration seal image 212 and the verification seal image (thin seal) 312 (312d). FIG. 7C shows a difference extraction image 511 (511e) between the registered seal image 212 and the verification seal image (thick seal) 312 (312e).

  FIG. 8 is a diagram illustrating another example of the difference extraction result calculated when there is an error in the collation mark. As illustrated in FIG. 8, the seal stamp collation apparatus 10 ′ acquires a difference extraction image 512 as a difference extraction result between the registration mark image 213 and the collation mark image (mark with an error) 313. In the example illustrated in FIG. 8, as in the case illustrated in FIG. 6, there is an error in the collation mark (since the collation mark is different from the registration mark), there are pixels having a difference value.

  When determining whether or not the collation mark is the same mark as the registration mark by the above-described method, if the allowable difference pixel amount (Thr1) is simply increased, the collation mark different from the registration mark is overlooked. End up. In the technique disclosed in Patent Document 1 described above, the thinning process does not work effectively for an unclear image or a thick image whose connection information has changed.

<First Embodiment>
[Description of configuration]
FIG. 9 is a diagram showing a functional configuration of the seal collation apparatus according to the present embodiment. As shown in FIG. 9, the seal collation apparatus 10 according to the first embodiment of the present invention differs from the function of the seal collation control unit 100 ′ in the function of the seal collation control unit 100, and further includes an error image determination auxiliary unit 500. In this respect, it is different from the general seal collation apparatus 10 ′ applicable to the above-described embodiment. Accordingly, among the configurations included in the seal collation device 10, those having the same functions as the configurations included in the stamp verification device 10 ′ are denoted by the same reference numerals as the configurations included in the seal verification device 10 ′ and description thereof is omitted. To do.

  The seal stamp matching control unit 100 controls each functional block in the stamp stamp matching apparatus 10 to perform matching processing. Specifically, the seal stamp matching control unit 100 matches the matching stamp image data with the registered stamp image data. When performing collation, the seal collation control unit 100 outputs an instruction indicating that collation image data is output to the collation image data management unit 300, and the collation image data input from the collation image data management unit 300 The collation mark image data is extracted from the image to obtain the collation mark image data. Further, the seal collation control unit 100 outputs an instruction indicating that the registered stamp image data is to be output to the registered stamp image data management unit 200, and accepts the input of the registered stamp image data from the registration stamp image data management unit 200. Get registered seal image data. The seal stamp matching control unit 100 outputs the acquired matching stamp image data and registered stamp image data to the error image determination assisting unit 500.

  Further, the seal collation control unit 100 determines the “error image” data input from the error image determination auxiliary unit 500 as a difference amount, and whether the collation mark and the registration mark are the same (the collation mark is normal). Whether there is a difference or whether there is an error in the verification mark. The seal collation control unit 100 may perform the above determination for each area constituting the “error image”. The seal stamp verification control unit 100 outputs the determination result to a display unit (not shown) connected to the seal stamp verification device 10.

  The error image determination auxiliary unit 500 executes a process of acquiring an “error image” described below. The function of the error image determination assisting unit 500 is realized, for example, when the CPU executes a program stored in a memory such as a RAM existing in the seal collation apparatus 10.

  The “error image” is an image obtained by superimposing the check mark image and the registration mark image so that the overlapping portion becomes large and processing the corresponding coordinates of each image with a pattern as shown in FIG. It is.

Specifically, the error image determination auxiliary unit 500 is designated by the corresponding coordinates among the central pixel designated by the corresponding coordinates among the pixels constituting one image and the pixels constituting the other image. Compare the center pixel and the neighboring surrounding pixels of the center pixel As a result of the comparison, the error image determination auxiliary unit 500 indicates that “one central pixel is a black pixel (having a predetermined pixel value), and the other central pixel or an adjacent surrounding pixel is black (having a predetermined pixel value). “If there is no pixel”, it is determined that “error” has occurred in the corresponding pixel, and in “other cases”, it is determined that the corresponding pixel “matches”. The adjacent surrounding pixels are pixels existing up to N pixels around the center pixel except for the center pixel. The value of N is not particularly limited, and the number of adjacent surrounding pixels is (2N + 1) ² −1. When N is 1, eight pixels existing so as to surround one outside of the central pixel are adjacent surrounding pixels.

  FIG. 10 is a diagram illustrating combinations that can be considered as a case where “error” occurs in the corresponding pixel and a case where the corresponding pixel “matches”. A broken line frame indicates an adjacent surrounding search range. Pixels in the adjacent surrounding search range are adjacent surrounding pixels. However, the center pixel exists in the center of the adjacent search range. In FIG. 10, the center pixel and adjacent surrounding pixels of the registered stamp image are indicated as “registered”, and the center pixel and adjacent surrounding pixels of the verification stamp image data are indicated as “checked”.

  The error image determination auxiliary unit 500 obtains “match” or “error” as a determination result for the corresponding pixel as shown in FIG. 10, and determines the array to be able to store the value in association with the coordinates specifying the corresponding pixel. Store the result. For example, it is assumed that the array is secured in a memory such as a RAM existing in the seal collation apparatus 10. Since this arrangement is considered to be image data that has been painted with “error” and “match”, it will be referred to as “error image” data. In this way, the error image determination assisting unit 500 generates error image data in which the corresponding pixel determined to have an error and the corresponding pixel determined to match are set as different pixel values. .

[Description of operation]
The proposed procedure is shown in FIG. FIG. 11 is a flowchart showing a flow of processing executed by the seal collation apparatus according to the present embodiment. In addition, about the process of step S10-step S40, since it is the same as the process demonstrated using FIG. 2, description is abbreviate | omitted.

  In step S150, the error image determination assisting unit 500 performs shift difference extraction and creates the “error image” described above. Although the value set to N is not particularly limited, for example, a value of about 3% (or about 5%) of the width of the verification mark image may be designated. The seal collation control unit 100 searches the “error image” even for pixels existing in the vicinity of N pixels away from the pixel even when the pixel values do not match between the corresponding pixels. For this reason, if the continuous region where the pixel value is different is spread over a relatively wide range between the images where the pixel value is different between the corresponding pixels, the seal collation control unit 100 It can be determined that an error has occurred in the continuous area. On the other hand, when the continuous area where the pixel value is different is spread only in a relatively narrow range, it can be determined that no error has occurred in the continuous area (error can be allowed). ).

  FIG. 12 is a diagram illustrating an example of an error image created by the seal collation apparatus according to the present embodiment. As shown in FIG. 12, among the pixels constituting the error image 612, a continuous region (“Ota” in which a difference is generated between the registration mark image 213 and the verification mark image 313 due to the imprinting of a slight mark. The pixel constituting the portion corresponding to the point “)” is largely shown in black. On the other hand, a continuous area (a part of the seal stamp or a part corresponding to “Ota”) in which both images differ depending on the magnitude and direction of the force at the time of stamping is shown in small black. .

  In step S160, the seal collation control unit 100 determines the difference amount of the error image (pixel value set in the error image data) for each region. In step S150, the error image 612 created by the error image determination auxiliary unit 500 is divided. The direction of division is not particularly limited, but in the present embodiment, the error image 612 is divided in the vertical direction and the horizontal direction. The seal collation control unit 100 determines whether or not there is an error of a predetermined amount or more in each region obtained by division, and if it is determined that there is an error of a predetermined amount or more, the region is determined as an error region. The reason for setting it to a predetermined amount or more is to exclude fine noise existing in the verification mark image. In addition, regarding the continuous area of the part that causes an error in each area, if the width of the continuous area (the number of continuous pixels, etc.) is greater than a certain value, it is determined that there is a predetermined amount of error. Also good. As a result, fine errors are excluded, so that the accuracy of noise removal can be further increased.

  FIG. 13 is a diagram illustrating an error region determined by the seal collation apparatus according to the present embodiment. In the example illustrated in FIG. 13, the seal collation control unit 100 divides the error image 612 into four parts in the vertical direction and the horizontal direction. In the example illustrated in FIG. 13, the seal collation control unit 100 determines that the error region 613 (613a) is a region having an error of a predetermined amount or more. In addition, the seal collation control unit 100 can set the error area 613 (613a) as a new error image, and can further perform the process of determining the error area in the same manner for the newly set error image. As a result, a region having an error of a predetermined amount or more can be specified by a narrower range.

  FIG. 14 is a diagram showing an error region specified by a narrower range by the seal collation apparatus according to the present embodiment. In the example illustrated in FIG. 14, the seal collation control unit 100 specifies an error region 613 (613b) as a region having an error of a predetermined amount or more by a narrower range.

  In step S170, in order to display the error region determined in step S160 so that it can be visually grasped, the seal stamp matching control unit 100 displays information for specifying the error region on a display unit (not shown). Output. Examples of a method for displaying the error region so that the error region can be visually grasped include a method for displaying the error region in an enlarged manner or a colored frame surrounding the error region.

[Description of effects]
(1) According to the present embodiment, it is possible to distinguish between an error caused by the magnitude and direction of force at the time of stamping and an error caused by imprinting a slight mark. This effect is achieved when the seal collation apparatus 10 creates the error image described above, the seal collation apparatus 10 determines the error area, and the like.
(2) The seal collation apparatus 10 can display an error image on the display unit. Further, the seal collation apparatus 10 can highlight the error area on the display unit as a place to be watched. For this reason, the operator of the seal stamp collating apparatus 10 can easily confirm whether or not the seal stamp used for the stamp is a different mark.

[Modification]
In the above, the preferred embodiments of the present invention have been described with reference to the accompanying drawings, but it goes without saying that the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Understood.

DESCRIPTION OF SYMBOLS 10 Seal collation apparatus 10 'Seal collation apparatus 100 Seal collation control part 100' Seal collation control part 200 Registration stamp image data management part 210 Registration stamp image data memory | storage part 212 Registration stamp image 213 Registration stamp image 300 Collation image data management part 310 Collation image data storage unit 311 Collation image 312 Collation mark image 313 Collation mark image 400 Form reading unit 500 Error image determination auxiliary unit 511 Difference extraction image 512 Difference extraction image 612 Error image 613 Error region

Claims (7)

A seal collation device that judges whether or not the collation mark is the same as the registration mark by collating registered mark image data registered in advance with collation mark image data on which the collation mark is stamped. And
A collation image data storage unit for storing collation image data;
A collation image data management unit for managing the collation image data stored in the collation image data storage unit;
A registered seal image data storage unit for storing the registered seal image data;
A registered seal image data management unit for managing the registered seal image data stored in the registered seal image data storage unit;
The verification image data is acquired from the verification image data storage unit via the verification image data management unit, the verification seal image data is extracted from the acquired verification image data, and the extracted verification seal image data And a seal collation control unit that superimposes the registered seal image data,
Of the pixels constituting one image in the collation seal image data and the registered seal image data superimposed by the seal collation control unit, the center pixel designated by the corresponding coordinates and the pixels constituting the other image An error image determination auxiliary unit that determines whether or not an error has occurred in the pixel by comparing the center pixel specified by the corresponding coordinates and the neighboring surrounding pixels of the center pixel;
Equipped with a,
The seal collation control unit determines an area as an error area when the size of an area where pixels having an error are continuous is equal to or larger than a predetermined area . The error image determination auxiliary unit is
If one of the central pixels has a predetermined pixel value and the other central pixel or the adjacent surrounding pixel has no pixel having the predetermined pixel value, an error occurs in the corresponding pixel. Otherwise, it is determined that the corresponding pixels match.
The seal collation apparatus according to claim 1, wherein: The error image determination auxiliary unit is
Generating error image data in which the corresponding pixel determined to have an error and the corresponding pixel determined to match are set as different pixel values;
The seal collation apparatus according to claim 2, wherein: The seal collation control unit
Outputting the error image data to a display unit;
The seal collation apparatus according to claim 3, wherein: The seal collation control unit
The pixel value set in the error image data is determined whether there is an error of a predetermined amount or more for each region obtained by dividing the error image, and the region determined to have an error of the predetermined amount or more is determined as an error region. Judge as
The seal collation apparatus according to claim 3, wherein: The seal collation control unit
Outputting information for specifying the error region to a display unit;
The seal collation apparatus according to claim 5, wherein: It is determined whether or not the collation mark is the same as the registration mark by collating the registered mark image data registered in advance with the collation mark image data on which the collation mark is stamped. A collation image data storage unit that stores the collation image data management unit that manages the collation image data stored in the collation image data storage unit, and a registration stamp image data storage that stores the registration stamp image data Verification by a stamp verification device comprising: a registration stamp image data management unit that manages the registration stamp image data stored in the registration stamp image data storage unit, a stamp verification control unit, and an error image determination auxiliary unit A method,
The stamp verification control unit acquires the verification image data from the verification image data storage unit via the verification image data management unit, and extracts verification seal image data from the acquired verification image data, Superimposing the extracted check mark image data and the registration mark image data;
A center pixel specified by coordinates corresponding to one of the pixels constituting one image in the verification seal image data and the registration seal image data superimposed by the seal verification control unit by the error image determination auxiliary unit. Comparing the center pixel specified by the corresponding coordinates among the pixels constituting the other image and the neighboring surrounding pixels of the center pixel to determine whether an error has occurred in the pixel ;
Only including,
A seal verification method, comprising: a step of determining, as the error area, an area where an area in which pixels in which an error occurs is equal to or larger than a predetermined area by the seal verification control unit .

Images