JP2018136785A - Imprint collation program, imprint collation device and imprint collation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the accuracy of colation between a registered seal impression and a seal impression to be collated.SOLUTION: The seal imprint collation program causes a computer to execute the processes of acquiring image data of a seal imprint to be collated, which is the seal imprint of a collation target, image data of a registered seal imprint corresponding to the seal imprint to be collated, and information indicating a specified portion in the registered seal imprint, calculating a first coincidence rate which is a rate of coincidence between the seal imprint to be collated and the registered seal imprint in a region including a portion other than the specified portion and a second coincidence rate which is a rate of coincidence between the seal imprint to be collated and the registered seal imprint in the specified portion, and determining whether or not the seal imprint to be collated coincides with the registered seal imprint based on the first coincidence rate and the second coincidence rate.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an imprint collation program, an imprint collation apparatus, and an imprint collation method.

  In a financial institution, when a deposit is requested to be refunded at a counter, the received registered seal is compared with the seal imprinted on the refund slip (refund invoice) (checked seal). At the time of collation, for example, a process of automatically collating the registered imprint image data and the imprint image data stamped on the refund slip is performed. And it is required to improve the accuracy of the matching process.

  As a related technique, a technique for evaluating the degree of coincidence between a registered seal and a check target seal has been proposed (see, for example, Patent Document 1).

  In addition, a technique for calculating a feature value indicating a local feature of a difference between a registered seal and a check target seal has been proposed (see, for example, Patent Document 2).

  In addition, the imprint part of the registered seal is divided into a plurality of segments and collation is performed for each segment of the registered seal against the collated seal, and the segment with the lowest match rate between the collated seal and the registered seal is selected. A technique for outputting has been proposed (see, for example, Patent Document 3).

  In addition, when the number of different pixels is equal to or greater than the threshold in any fixed-size rectangular area, the read mark image data is determined as a similar character, and the registered mark image data and the read mark image data are determined based on the determination result. A technique for outputting a determination result of whether or not they match is proposed (see, for example, Patent Document 4).

Japanese Patent Laid-Open No. 2006-71440 Japanese Patent Laying-Open No. 2005-165383 JP 2001-76136 A JP 2010-26874 A

  When calculating the matching rate between the entire registered seal and the entire checked seal, for example, if there is an influence of dust, blurring, blurring, etc. on the stamp, the matching rate is calculated low even if the checked seal is valid, There is a possibility that it is determined that the seal impression does not match. Even if the collated mark is a fake mark and is different from the registered mark, if the matching ratio of the entire seal is high, it may be determined that the seal is matched.

  As one aspect, an object of the present invention is to improve collation accuracy between a registered imprint and a collation target imprint.

  In one aspect, the seal imprint matching program indicates image data of a target imprint to be verified, image data of a registered imprint corresponding to the target seal imprint, and a designated portion of the registered imprint. Information, and in a region including a portion other than the designated portion, a first coincidence rate that is a coincidence rate between the collated imprint and the registered imprint, and the collated imprint in the designated portion And a second coincidence rate that is a coincidence rate between the registered seal stamp and the registered seal stamp, and based on the first match rate and the second match rate, determine whether the collated seal stamp and the registered seal stamp match It is characterized by causing a computer to execute the processing to be performed.

  According to one aspect, it is possible to improve the collation accuracy between the registered seal and the collated seal.

It is a figure which shows an example of the whole structure of the seal stamp registration system of embodiment. It is a figure which shows an example of the whole structure of the stamp collation system of embodiment. It is a figure which shows an example of a seal. It is a figure which shows an example of a registration imprint image. It is a figure which shows an example of a to-be-verified imprint image. It is a figure which shows an example of the image which overlap | superposed the registration imprint image and the collated seal imprint image. It is a flowchart which shows an example of the flow of a registration process. It is a flowchart which shows an example of the flow of a collation process. It is a figure which shows the example of a screen display in the collation process of related technology. It is a figure which shows the example of a screen display in the collation process of embodiment. It is a figure which shows an example of the hardware constitutions of an imprint registration system and an imprint verification system.

<Example of Overall Configuration of Imprint Registration System of Embodiment>
Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 shows an example of the overall configuration of an imprint registration system according to an embodiment. The imprint registration system of the embodiment includes a reading device 1a, an input device 2a, a display device 3a, an imprint registration device 4, and an imprint storage unit 5. The imprint storage unit 5 may be included in the imprint registration device 4.

  For example, when a user (a financial institution user) opens an account, a user seals a report stamp on a form (for example, a seal report form). Then, the receptionist receives the stamped form and reads the form using the reading device 1a. Hereinafter, an imprint resulting from the seal of a notification stamp may be referred to as a registered imprint.

  The reading device 1 a captures a form including a registered seal, generates image data of the form, and transmits the image data to the seal registration apparatus 4. The reading device 1a is, for example, a scanner or a camera.

  The input device 2a receives designation (input) of a position in the registered seal stamp from the user, and outputs information indicating the designated portion. The designated portion is, for example, a feature portion recognized by the user. Hereinafter, the designated part of the seal impression may be described as a characteristic part. In addition, information indicating a designated portion may be described as feature location information. The characteristic location information is, for example, coordinate information indicating the position of a specified portion (range) in the registered seal impression.

  The input device 2a accepts input of identification information (for example, an account number) that can identify the user. The input device 2a is, for example, a keyboard, a mouse, or a touch panel display.

  The display device 3a displays a registered seal image, a form image, or the like. The display device 3a may be, for example, a liquid crystal display or a touch panel display. When the input device 2a and the display device 3a are touch panel displays, the input device 2a and the display device 3a may be one device.

  For example, the user touches a part of the imprint image displayed on the input device 2a (touch panel display) to designate the position of the characteristic portion in the imprint. Further, the user operates the input device 2a (mouse) to place the pointer on the feature portion in the seal impression image displayed on the display device 3a and click to specify the position of the feature portion in the seal impression. Also good. Further, the user may designate the position of the feature portion in the seal impression by operating the input device 2a (keyboard) and inputting coordinates indicating the position of the feature portion in the seal impression.

  For example, it is assumed that the user designates a unique part of the seal as a characteristic part. The characteristic portion is, for example, a portion corresponding to a portion of the character “stop” or “splash” or a portion where the user has intentionally lost the seal.

  Although it has been described that the user (the user of the financial institution) inputs the position of the characteristic portion using the input device 2a, the reception staff may input the position of the characteristic portion using the input device 2a.

  The seal imprint registration apparatus 4 includes a registered form image acquisition unit 11, a registration stamp extraction unit 12, a feature acquisition unit 13, an identification information acquisition unit 14, a registration unit 15, and a display control unit 16.

  The registered form image acquisition unit 11 acquires form image data including a registered seal stamp from the reading device 1a. Hereinafter, image data of a form including a registered seal image may be referred to as a registered form image.

  The registered stamp extraction unit 12 extracts a registered stamp portion from the registered form image. For example, the registered seal extraction unit 12 acquires coordinate information indicating a seal designation area in the form, and extracts image data in the seal designation area as a registered seal image. The seal designation area is an area for stamping a seal in the form. The coordinate information of the stamp designation area is stored in advance in a form storage unit (not shown), for example.

  For example, the registered seal extraction unit 12 performs a binarization process on the extracted registered seal image, and outputs the binarized image as a registered seal image.

  The feature acquisition unit 13 acquires feature location information indicating the position of the feature portion in the seal impression from the input device 2a.

  The identification information acquisition unit 14 acquires user identification information from the input device 2a. The identification information acquisition unit 14 may acquire the identification information described in the form by performing image recognition processing on the registered form image.

  The registration unit 15 acquires a registered seal image from the registration seal extraction unit 12, acquires feature location information from the feature acquisition unit 13, and acquires identification information from the identification information acquisition unit 14. Then, the registration unit 15 stores the registered seal image, the characteristic location information, and the identification information in the seal storage unit 5 in association with each other.

  The display control unit 16 performs display control on the display device 3a. For example, when the user inputs the position of the characteristic portion, the display control unit 16 displays a registered seal image.

  The imprint storage unit 5 stores a registered imprint image, feature location information, and identification information associated with each other by the registration unit 15.

<Example of Overall Configuration of Imprint Collation System of Embodiment>
FIG. 2 shows an example of the overall configuration of the seal collation system of the embodiment. The imprint verification system of the embodiment includes a reading device 1b, an input device 2b, a display device 3b, an imprint storage unit 5, and an imprint verification device 6. The imprint checking device 6 is an example of a computer.

  The imprint verification device 6 and the imprint registration device 4 may be the same device. For example, the seal collation apparatus 6 may include each element included in the seal registration apparatus 4.

  For example, when a user (a user of a financial institution) withdraws cash at a window, a stamp used for verification is stamped on a form (for example, a refund slip). Then, the reception staff receives the stamped form and reads the form using the reading device 1b. Hereinafter, an imprint used for collation with a registered imprint may be referred to as a collated imprint.

  The reading device 1b captures a form including a check target seal, generates image data of the form, and transmits the image data to the seal check unit 6. Hereinafter, the image data of the form including the check target stamp may be referred to as a check form image. The reading device 1b is, for example, a scanner or a camera. The reading device 1b may be the same device as the reading device 1a.

  The input device 2b accepts input of identification information (for example, an account number) from the person in charge of reception and outputs the identification information to the seal collation device 6. The input device 2b is, for example, a keyboard, a mouse, or a touch panel display. The input device 2b may be the same device as the input device 2a.

  The display device 3b displays a collation determination result or the like by the imprint collation device 6. The display device 3b may be a display or a touch panel display, for example. When the input device 2b and the display device 3b are touch panel displays, the input device 2b and the display device 3b may be a single device. The display device 3b may be the same device as the display device 3a.

  The imprint storage unit 5 stores a registered imprint image, feature location information, and identification information associated with each other by the registration unit 15 of the imprint registration apparatus 4.

  The imprint collation apparatus 6 includes a collated form image acquisition unit 21, a collated imprint extraction unit 22, a registered imprint information acquisition unit 23, a calculation unit 24, a determination unit 25, and a display control unit 26.

The collated form image acquisition unit 21 obtains a collated form image from the reading device 1b.
The collation imprint extraction unit 22 extracts a stamp (collation imprint) portion from the collated form image. For example, the collation imprint extraction unit 22 extracts image data in the stamp designation area as a collation imprint image based on coordinate information indicating the stamp designation area in the form.

  The registered imprint information acquisition unit 23 acquires identification information corresponding to the check target imprint from the input device 2 b, and acquires a registered imprint image and feature location information corresponding to the identification information from the imprint storage unit 5. The registered imprint information acquisition unit 23 acquires identification information described in the form by performing image recognition processing of the collated form image, and acquires a registered imprint image and feature location information corresponding to the identification information. Also good.

  The calculation unit 24 acquires a check target imprint image from the check target imprint extraction unit 22, and acquires a registered stamp image and feature location information corresponding to the check target imprint image from the registration stamp information acquisition unit 23.

  Then, the calculation unit 24, based on the acquired collated imprint image, the registered imprint image, and the feature location information, the matching rate (first match) between the collated imprint and the registered imprint in an area including a portion other than the feature portion. Rate) and the coincidence rate (second coincidence rate) between the check target seal and the registered seal stamp in the feature portion, respectively. The characteristic portion is indicated in the characteristic location information as described above.

  Note that the region including a portion other than the feature portion may be the entire predetermined region including the seal impression (including the feature portion), or may be a region excluding the feature portion from the predetermined region including the seal impression. In the following description, it is assumed that the area including the part other than the characteristic part is the entire seal designation area (including the characteristic part).

  The determination unit 25 determines whether or not the check target imprint and the registered stamp match based on the first match rate and the second match rate calculated by the calculation unit 24.

  For example, even if there is a difference in the characteristic part of the seal impression, if there is no difference in the other part, the coincidence rate of the region including the part other than the characteristic part is high. However, if there is a difference in the characteristic part, there is a high possibility that the imprint is different. In addition, since the feature portion is a partial region of the entire seal impression, when there is a difference in the feature portion, the match rate (first match rate) in the feature portion is determined from the match rate (first match rate) of the region including the portion other than the feature portion. 2 coincidence rate) is calculated lower. That is, it becomes easier to detect the difference in the feature portion by determining whether or not the match is made using not only the first match rate but also the second match rate. For this reason, the imprint collation apparatus 6 of this embodiment can improve the imprint collation accuracy.

  For example, when the first matching rate is equal to or higher than the first threshold value and the second matching rate is equal to or higher than the second threshold value, the determination unit 25 determines that the check target imprint and the registered stamp match. The first threshold value and the second threshold value may be the same or different values.

  For example, the second threshold value may be larger than the first threshold value. By making the first threshold value relatively small, for example, when dust, blurring, blurring, or the like is present in addition to the feature portion, there is a possibility of erroneously determining that the check target imprint that is actually the same as the registered imprint is different. Can be reduced. In addition, by relatively increasing the second threshold value, it is possible to reduce the possibility of erroneously determining that a collated imprint that is actually different from a registered imprint (for example, an imprint by a camouflaged seal) is the same.

  The determination unit 25, for example, based on a total value of a value obtained by multiplying the first match rate by the first value and a value obtained by multiplying the second match rate by a second value greater than the first value. You may determine whether a collation seal stamp and a registration seal stamp match. That is, the determination unit 25 performs collation based on the total value obtained by weighting the second match rate higher than the first match rate. In this case, for example, when the value based on the calculated total value is equal to or greater than the third threshold, the determination unit 25 may determine that the collated imprint image and the registered imprint image match. The third threshold may be the same value as the first threshold or the second threshold, or may be a different value.

  By making the weighting for the first matching rate relatively small, for example, when there is dust, blurring, blurring, etc. in addition to the characteristic part, it is erroneously determined that the checked imprint that is actually the same as the registered imprint is different. The possibility of doing so can be reduced. In addition, by increasing the weighting for the second matching rate, it is possible to reduce the possibility of misjudging that the actually-matched imprint different from the registered imprint (for example, imprint by a fake seal) is the same. it can.

  The display control unit 26 displays the collation determination result by the determination unit 25 on the display device 3b. The display control unit 26 may display the collated seal imprint and the registered seal stamp on the display device 3b together with the collation determination result.

<Example of seal and seal image>
FIG. 3 is a diagram illustrating an example of a seal. The seal shown in FIG. 3 indicates a notification stamp used in the embodiment. As shown in FIG. 3, it is assumed that a part of a circular frame in a seal is missing and the user designates the missing part as a feature part.

  FIG. 4 is a diagram illustrating an example of a registered seal image. The registered seal image shown in FIG. 4 is a binary image of the seal image obtained by stamping the seal shown in FIG. A rectangular area shown in FIG. 4 indicates a seal designation area in the form. As described above, the input device 2a receives an input of the position of the characteristic portion in the seal impression from the user. In the example shown in FIG. 4, it is assumed that a 4 × 4 dot portion at coordinates (d, M) is designated as a feature portion.

  FIG. 5 is a diagram illustrating an example of a check target imprint image. A rectangular area shown in FIG. 5 indicates a seal designation area in the form. The collated imprint image shown in FIG. 5 is an imprint image different from the registered imprint image. That is, the collated seal stamp image shown in FIG. 5 is a binary image of a seal stamp with a seal different from the registered seal.

  FIG. 6 is a diagram illustrating an example of an image obtained by superimposing a registered seal image and a check target seal image. 6 is an image obtained by superimposing the registered seal image shown in FIG. 4 and the checked seal image shown in FIG. As shown in FIG. 6, there is a difference between the registered imprint image and the image to be verified in the feature portion, and there is a difference between the registered imprint image and the image to be verified in the portion other than the feature portion (other portion). .

  Also, the black portions in FIG. 6 are portions corresponding to the seals existing in both the registered seal image and the check target seal image. The shaded parts (differences in the characteristic parts and differences 1 and 2 in the other parts) in FIG. 6 are parts corresponding to the seals that are present in the target seal stamp image but not in the registered seal stamp image. A dot portion (difference 3 in other portions) in FIG. 6 is a portion corresponding to an imprint that exists in the registered imprint image but does not exist in the collated imprint image.

<Example of calculation processing by calculation unit>
An example of the calculation process of the calculation unit 24 will be described using the example illustrated in FIG. The calculation unit 24 calculates the match rate by regarding that portions other than the differences shown in FIG. 6 match. The calculation unit 24 calculates the first match rate as shown in the following formula (1).
Number of matching dots in the seal designation area / total number of dots = first matching rate (1)

In the example shown in FIG. 6, the number of matching dots in the seal designation area is 4075. Note that the number of matching dots in the seal designation area is the number of dots excluding differences (differences in characteristic parts and differences in other parts) in the seal designation area. In the example shown in FIG. 6, the total number of dots is 4096. In this case, the calculation unit 24 calculates the first match rate as follows.
4075 ÷ 4096 = 99%

Further, the calculation unit 24 calculates the second coincidence rate as in the following formula (2).
Number of matching dots in feature portion / number of dots in feature portion = second matching rate (2)

In the example shown in FIG. 6, the number of matching dots in the feature portion is nine. Note that the number of matching dots in the feature portion is the number of dots excluding differences in the feature portion. The number of dots in the feature portion is 16. In this case, the calculation unit 24 calculates the second match rate as follows.
9 ÷ 16 = 56%

<First Example of Determination Processing of Determination Unit>
A first example of the determination process of the determination unit 25 will be described using the example illustrated in FIG. In the first example, the determination unit 25 determines that the collated imprint and the registered imprint match when the first matching rate is equal to or higher than the first threshold and the second matching rate is equal to or higher than the second threshold. To do. In the example shown below, it is assumed that the first threshold is 80% and the second threshold is 80%.

  In the calculation result of the calculation unit 24 described above, the first matching rate is 99%, which is equal to or higher than the first threshold (80%). However, the second matching rate is 56%, which is less than the second threshold (80%). Therefore, when the example shown in FIG. 6 is used, the determination unit 25 determines that the collated seal image and the registered seal image do not match.

  For example, when the number of matching dots in the feature portion is 16, the second matching rate is 100%. When the first matching rate is 99% as described above, the first matching rate is equal to or higher than the first threshold value, and the second matching rate is equal to or higher than the second threshold value. In this case, the determination unit 25 determines that the collated imprint image and the registered imprint image match.

  Note that, as described above, the second threshold value may be larger than the first threshold value. For example, the first threshold may be 80% and the second threshold may be 90%.

<Second Example of Determination Processing of Determination Unit>
A second example of the determination process of the determination unit 25 will be described using the example illustrated in FIG. In the second example, the determination unit 25 sets the sum of the value obtained by multiplying the first match rate by the first value and the value obtained by multiplying the second match rate by a second value greater than the first value. Based on this, it is determined whether or not the check target seal matches the registered seal. For example, when the weighting match rate calculated by the following equation (3) is equal to or greater than the third threshold, the determination unit 25 determines that the collated seal imprint and the registered seal match.
(First matching rate × first value + second matching rate × second value) ÷ (first value + second value) = weighting matching rate (3)

When the first value is 1 and the second value is 5, when the example shown in FIG. 6 is used, the weighting match rate is calculated as follows.
(99% × 1 + 56% × 5) ÷ 6 = 63%

  It is assumed that the third threshold is 80%, for example. In this case, since the weighting coincidence rate (63%) is less than the third threshold, the determination unit 25 determines that the collated imprint image and the registered imprint image do not match. The third threshold value may be a value different from the first threshold value or the second threshold value.

<Example of registration processing flow of embodiment>
FIG. 7 is a flowchart illustrating an example of the flow of registration processing. The reading device 1 a captures a form including a registered seal, generates image data of the form, and transmits the image data to the seal registration apparatus 4. Then, the registered form image acquisition unit 11 acquires form image data (registered form image) including the registered seal stamp from the reading device 1a (step S101).

  The registered stamp extraction unit 12 extracts a registered stamp portion from the registered form image (step S102). For example, the registered seal extraction unit 12 acquires coordinate information indicating a seal designation area in the form, and extracts image data in the seal designation area as a registered seal image.

  The feature acquisition unit 13 acquires feature location information indicating the position of the feature portion in the seal impression from the input device 2a (step S103).

  The identification information acquisition unit 14 acquires user identification information from the input device 2a (step S104).

  The registration unit 15 associates the registered seal image, the characteristic location information, and the identification information with each other and stores them in the seal storage unit 5 (step S105).

<Example of Flow of Collation Processing of Embodiment>
FIG. 8 is a flowchart illustrating an example of the flow of collation processing. The reading device 1b captures a form including a check target seal, generates image data of the form, and transmits the image data to the seal check unit 6. Then, the collated form image acquisition unit 21 obtains image data of the form including the collation stamp (collation form image) from the reading device 1b (Step S201).

  The to-be-checked imprint extraction unit 22 extracts an imprint (checked imprint) portion from the to-be-checked form image (step S202).

  The registered seal imprint information acquisition unit 23 acquires identification information corresponding to the check target stamp from the input device 2b, and acquires a registered seal image and feature location information corresponding to the identification information from the stamp storage unit 5 (step S203). .

  The calculation unit 24 obtains the collated imprint image, the registered imprint image, and the feature location information, and the matching rate (first matching rate) between the collated imprint and the registered imprint in a region including a portion other than the feature portion. Then, the coincidence rate (second coincidence rate) between the collated seal stamp and the registered seal stamp in the characteristic part is calculated (step S204).

  The determination unit 25 determines whether or not the check target imprint matches the registered seal based on the first match rate and the second match rate calculated by the calculation unit 24 (step S205).

  For example, when the first matching rate is equal to or higher than the first threshold value and the second matching rate is equal to or higher than the second threshold value, the determination unit 25 determines that the check target imprint and the registered imprint match (first Example). The determination unit 25, for example, based on a total value of a value obtained by multiplying the first match rate by the first value and a value obtained by multiplying the second match rate by a second value greater than the first value. It may be determined whether the verification seal and the registered seal match (second example).

  As described above, the seal imprint matching device 6 uses the match rate (second match rate) in the feature portion as well as the match rate (first match rate) in the entire seal designation area, and the check target imprint image and the registered seal image. Is matched. As described above, the characteristic portion is a portion designated by the user and is considered to be a unique portion. Therefore, the imprint checking device 6 can improve the checking accuracy by checking the imprint using not only the first matching rate of the seal designation area but also the second matching rate.

<Example of screen display>
FIG. 9 is a diagram illustrating an example of screen display in the related technology matching process. In the related technique shown in the example of FIG. 9, it is assumed that the feature portion is not specified.

  As shown in FIG. 9A, the registered seal stamp is displayed on the screen in the first color (for example, blue). Further, as shown in FIG. 9B, the check target imprint is displayed in the second color (for example, red).

  Further, in the collation result shown in FIG. 9C, a portion that is included in the registered seal imprint and not included in the collated seal imprint is displayed in the first color. In addition, a portion that is included in the check target seal and not included in the registered seal stamp is displayed in the second color. Further, the portion included in both the registered seal stamp and the check target seal stamp is displayed in the third color (for example, green).

  FIG. 10 is a diagram illustrating an example of screen display in the collation process of the embodiment. As shown in FIG. 10A, the display control unit 26 displays the registered seal impression on the screen in the first color. The display control unit 26 displays the feature portion as a solid rectangular frame based on the feature location information stored in the seal impression storage unit 5.

  As shown in FIG. 10B, the display control unit 26 displays the check target imprint on the screen in the second color. In addition, the display control unit 26 displays the characteristic portion as a broken-line rectangular frame based on the characteristic location information stored in the seal impression storage unit 5.

  When displaying FIG. 10A and FIG. 10B, for example, the input device 2b may accept specification of a feature portion from a person in charge of collation. Then, the display control unit 26 may display the designated portion with a rectangular frame.

  And the display control part 26 displays only the characteristic part among registration seals, as shown in FIG.10 (c). Further, as shown in FIG. 10D, the display control unit 26 displays only the characteristic part of the collated seal impression.

  Then, as shown in FIG. 10E, the display control unit 26 displays an image obtained by superimposing the registered seal stamp and the check target seal stamp as a matching result. The display control unit 26 displays a portion that exists only in the registered seal impression on the screen in the first color. In addition, the display control unit 26 displays, on the screen in the third color, the portion that exists in both the registered seal and the check target seal in the feature portion. In addition, the display control unit 26 displays, on the screen, a fourth color (for example, light blue) that is present in both the registered seal stamp and the check target seal stamp in portions other than the feature portion.

  As described above, the display control unit 26 highlights the characteristic portions of the registered seal and the check target seal with a rectangular frame or the like. Further, the display control unit 26 displays the feature portion and the portion other than the feature portion in different forms (shapes and colors) among the registered seal stamp and the check target seal stamp. Thereby, the seal imprint collation apparatus 6 can express the feature portion of the seal impression more emphasized.

<Example of hardware configuration of imprint registration system and imprint verification system>
Next, an example of the hardware configuration of the seal imprint registration system and the seal collation system will be described. FIG. 11 is a diagram illustrating an example of a hardware configuration of the seal imprint registration system and the seal collation system. As shown in the example of FIG. 11, a processor 111, a random access memory (RAM) 112, an auxiliary storage device 113, and a communication interface 114 are connected to the bus 100. In addition, a graphic processing device 115, an input interface 116, an optical drive device 117, and a device connection interface 118 are connected to the bus 100.

  The processor 111 executes a program expanded in the RAM 112. As a program to be executed, an imprint registration program or an imprint collation program for performing processing in the embodiment may be applied.

  The auxiliary storage device 113 stores a program developed in the RAM 112. The auxiliary storage device 113 is a storage device that stores various types of information. For example, a hard disk drive, a semiconductor memory, or the like may be applied.

  The communication interface 114 is used when the seal imprint registration device 4 and the seal collation device 6 transmit and receive various types of information to and from other information processing terminals (for example, the mobile terminal 125).

  A display 119 is connected to the graphic processor 115. The graphic processing device 115 is a board on which, for example, a graphics processing unit (GPU) that performs processing for projecting video is mounted. The display device 3a shown in FIG. 1 and the display device 3b shown in FIG. 2 may be realized by the display 119, for example.

  A keyboard 120, a mouse 121, and a scanner 122 are connected to the input interface 116. The reading device 1a shown in FIG. 1 and the reading device 1b shown in FIG. 2 may be realized by a scanner 122, for example. The input device 1a illustrated in FIG. 1 and the input device 2b illustrated in FIG. 2 may be realized by a keyboard 120 and a mouse 121, for example.

  The optical drive device 117 is provided so as to be connectable to an optical disc 123 (for example, Compact Disc (CD) or Digital Versatile Disc (DVD)).

  The device connection interface 118 is provided so as to be connectable to the portable recording medium 124. As the portable recording medium 118, a portable memory, a semiconductor memory, or the like may be applied. An imprint registration program for performing the processing of the embodiment and an imprint verification program may be recorded on the portable recording medium 124.

  1 and 2 may be realized by the RAM 112, the auxiliary storage device 113, or the like. In the registered form image acquisition unit 11, the registration stamp extraction unit 12, the feature acquisition unit 13, the identification information acquisition unit 14, the registration unit 15, and the display control unit 16 illustrated in FIG. 1, the processor 111 executes a given seal registration program. It may be realized by doing. Further, the collated form image acquisition unit 21, the collated seal imprint extraction unit 22, the registered imprint information acquisition unit 23, the calculation unit 24, the determination unit 25, and the display control unit 26 illustrated in FIG. It may be realized by execution by the processor 111.

  Further, the seal imprint registration device 4 and the seal collation device 6 of the embodiment may be communicable with the mobile terminal 125 via the network 200. For example, the imprint registration device 4 may output a registered imprint image to the mobile terminal 125. For example, the imprint collation apparatus 6 may output a collated imprint image, a collation result, and the like to the mobile terminal 125.

  The RAM 112, the auxiliary storage device 113, and the portable recording medium 124 are all examples of a tangible storage medium that can be read by a computer. These tangible storage media are not temporary media such as signal carriers.

<Others>
The present embodiment is not limited to the above-described embodiment, and various configurations or embodiments can be taken without departing from the gist of the present embodiment.

DESCRIPTION OF SYMBOLS 1a, 1b Reading apparatus 2a, 2b Input apparatus 3a, 3b Display apparatus 4 Imprint registration apparatus 5 Imprint storage part 6 Imprint collation apparatus 21 Checked form image acquisition part 22 Checked imprint extraction part 23 Registered imprint information acquisition part 24 Calculation part 25 Determination unit 26 Display control unit 111 Processor 112 RAM
113 Auxiliary storage device

Claims (6)

Obtaining image data of a target imprint to be verified, image data of a registered imprint corresponding to the target imprint, and information indicating a specified portion of the registered imprint,
In a region including a portion other than the designated portion, a first coincidence rate that is a coincidence rate between the collated imprint and the registered imprint, and the collated imprint and the registered imprint in the designated portion Calculate the second match rate, which is the match rate,
An imprint matching program that causes a computer to execute a process of determining whether the collated seal stamp matches the registered seal stamp based on the first match rate and the second match rate. When the first matching rate is equal to or higher than a first threshold value and the second matching rate is equal to or higher than a second threshold value, causing the computer to execute a process of determining that the collated seal impression matches the registered seal stamp The imprint verification program according to claim 1. The imprint verification program according to claim 2, wherein the second threshold value is greater than the first threshold value. Based on a total value of a value obtained by multiplying the first match rate by a first value and a value obtained by multiplying the second match rate by a second value greater than the first value, The imprint verification program according to claim 1, which causes a computer to execute a process of determining whether or not the registered imprint matches. Acquired image data of an imprint to be collated that is an imprint to be collated, image data of a registered imprint corresponding to the imprint to be collated, and information indicating a specified portion of the registered imprint, and the specified A first match rate, which is a match rate between the collated seal imprint and the registered seal stamp in a region including a portion other than a portion, and a match rate between the collated seal stamp and the registered seal stamp in the designated portion A calculation unit for calculating a second matching rate;
An imprint collation apparatus comprising: a determination unit that determines whether the collated imprint and the registered imprint match based on the first coincidence rate and the second coincidence rate. Obtaining image data of a target imprint to be verified, image data of a registered imprint corresponding to the target imprint, and information indicating a specified portion of the registered imprint,
In a region including a portion other than the designated portion, a first coincidence rate that is a coincidence rate between the collated imprint and the registered imprint, and the collated imprint and the registered imprint in the designated portion Calculate the second match rate, which is the match rate,
An imprint matching method, wherein a computer executes a process of determining whether the collated seal stamp matches the registered seal stamp based on the first match rate and the second match rate.

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