JP2018147371A - Seal impression deterioration determining program, seal impression verifying apparatus, and seal impression deterioration determining method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal impression deterioration determining program which can automatically detect deterioration of seal impression so as to prompt an operator to re-register the registered seal impression.SOLUTION: A computer is made to execute the steps of: comparing a pixel of a registered seal impression image with a pixel of a read seal impression image corresponding to the pixel and setting a predetermined value for each pixel as a value of the pixel according to a comparison result; adding, in each pixel, a value of the pixel set in an accumulated value obtained by accumulating, for each pixel, the value of the pixels and comparing, for each pixel, the added accumulated value with a predetermined threshold so as to set, based on the comparison result, a deterioration flag indicating whether or not there is deterioration; and determining, based on the set deterioration flag, whether or not the seal impression is deteriorated.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a seal stamp deterioration determination program in a seal stamp collating apparatus that collates stamp images.

  In the seal collation system, the seal stamp is collated by superimposing the registered imprint (report imprint) of the binary image and the read imprint of the binary image (see Patent Document 1 below). In the seal stamp verification system, a program process is performed to find a condition in which two seal images overlap most, and the seal is automatically superimposed. In the seal collation system, it is also possible to calculate a coincidence rate obtained by quantifying the degree of overlap and collate the seal based on the calculated coincidence rate.

  Since the registered seal image once registered is stored in the seal image database as electronic information, the same seal image can be obtained whenever it is referred to. On the other hand, a read imprint image to be compared with a registered imprint is obtained by reading a seal imprinted on a form or the like with a reading device (scanner, OHR, etc.). For this reason, the read imprint image changes each time depending on the method of stamping (dark, thin, rubbing, bleeding, etc.) and the deterioration of the seal (chips, clogging, breakage, etc.). If the method of stamping is poor or the seal is deteriorated, the status of the scanned imprint will be worse, causing the collation accuracy and matching rate to decrease, resulting in the re-acquisition of the scanned imprint, etc. There is a problem that gets worse. In particular, the deterioration of the seal results in a permanent decrease in collation accuracy. In order to prevent a decrease in verification accuracy due to deterioration of the seal, it is necessary to re-register the registered seal.

JP 2000-30059 A

  However, the matching based on the matching rate is to determine whether the registered imprint and the reading imprint match based on the matching rate calculated how many pixels overlap in the entire image. It was difficult to detect whether there was deterioration such as chipping in business operations.

  In view of the above problems, an object of the present invention is to provide a seal deterioration determination program that can automatically detect deterioration of a seal and prompt an operator to re-register a registered seal.

  In order to achieve the above object, the present invention provides a seal deterioration determination program for determining deterioration of a seal by comparing a registered seal image and a read seal image, wherein the registration seal image includes pixels corresponding to the pixels. Comparing the pixels of the read impression image and setting a predetermined value for each pixel as a value of the pixel according to the comparison result; and the pixel set to the accumulated value obtained by accumulating the pixel value for each pixel For each pixel, comparing the added accumulated value with a predetermined threshold value for each pixel, setting a deterioration flag indicating the presence or absence of deterioration based on the comparison result, and the set deterioration flag And causing the computer to execute a step of determining whether or not the seal is deteriorated based on the above.

  Further, in the seal degradation determination program of the present invention, the registered seal image is divided into a grid including a plurality of pixels, and whether or not the seal is degraded based on the number of degradation flags indicating the presence of degradation in the grid. Is a preferred embodiment.

  Moreover, in the seal stamp deterioration determination program of the present invention, when the set pixel value is a value indicating pixel mismatch, it is a preferable aspect to add the set pixel value to the accumulated value.

  In the seal deterioration determination program of the present invention, when adding the value of the set pixel to the accumulated value, the number of peripheral pixels having the same value as the set pixel value is equal to or greater than a predetermined addition threshold value. In this case, it is a preferable aspect to add the set pixel value to the accumulated value.

  Further, in the seal stamp deterioration determination program of the present invention, when it is determined that the seal stamp is deteriorated, a seal stamp deterioration warning image is generated based on the accumulated value accumulated for each pixel and displayed on the display device. Having further steps is a preferred embodiment.

  The present invention is also an imprint collation apparatus for judging deterioration of a seal by collating a registered imprint image with a read imprint image, wherein a pixel of the registered imprint image and a pixel of the read imprint image corresponding to the pixel are obtained. A comparison setting unit configured to compare and set a predetermined value for each pixel as a value of the pixel according to a comparison result; and to set an accumulated value obtained by accumulating the pixel value for each pixel to set the set pixel value for each pixel. A setting unit configured to compare the added accumulated value with a predetermined threshold value for each pixel and set a deterioration flag indicating the presence / absence of deterioration based on a comparison result, and based on the set deterioration flag, And a determination unit that determines whether or not the seal is deteriorated.

  The present invention is also a seal deterioration determination method for determining deterioration of a seal by comparing a registered imprint image and a read imprint image, the pixel of the registered imprint image, the pixel of the read imprint image corresponding to the pixel, and And setting a predetermined value for each pixel as a value of the pixel according to a comparison result, and setting the pixel value for each pixel to an accumulated value obtained by accumulating the pixel value for each pixel. Adding, comparing the added accumulated value and a predetermined threshold for each pixel, setting a deterioration flag indicating the presence or absence of deterioration based on the comparison result, and the seal stamp based on the set deterioration flag And determining whether or not it has deteriorated.

  According to the present invention, it is possible to automatically detect deterioration of a seal and prompt an operator to re-register a registered seal.

It is a figure which shows an example of a structure of the seal stamp collation system containing the seal stamp collation apparatus which mounts the seal stamp deterioration determination program in embodiment. It is a figure which shows an example of the functional block of the stamp collation apparatus in embodiment. It is a figure which shows an example of a seal stamp deterioration alerting image. It is a figure which shows an example of a seal stamp deterioration alerting image. It is a figure which shows an example of the imprint image management table. It is a figure which shows an example of a collation result information table. It is a figure which shows an example of a collation result pixel management table. It is a figure which shows an example of a mismatch information table. It is a figure which shows an example of an operating environment table. It is a flowchart which shows the seal | sticker deterioration determination flow in the seal imprint control apparatus in embodiment. It is a flowchart which shows the subroutine of the imprint image superimposition process in embodiment. It is a flowchart which shows the subroutine of the seal impression result image generation process in embodiment. It is a flowchart which shows the subroutine of the seal impression result image generation process in embodiment. It is a figure for demonstrating the storage order of the value of a mismatch flag in embodiment. 6 is a flowchart illustrating a subroutine of mismatch information aggregation processing according to the first embodiment. 6 is a flowchart illustrating a subroutine of mismatch information aggregation processing according to the first embodiment. 10 is a flowchart illustrating a subroutine of mismatch information aggregation processing according to the second embodiment. 10 is a flowchart illustrating a subroutine of mismatch information aggregation processing according to the second embodiment. It is a flowchart which shows the subroutine of the stamp deterioration determination process in embodiment. It is a flowchart which shows the subroutine of the stamp deterioration determination process in embodiment. It is a figure for demonstrating an example of the grid in embodiment. It is a figure for demonstrating an example of the other grid in embodiment. It is a flowchart which shows the subroutine of the stamp deterioration alerting image generation process in embodiment. It is a figure which shows the example of a display of the registration stamp binary image, the reading stamp multi-value image, and a seal stamp collation result image at the time of seal stamp degradation non-detection. It is a figure which shows the example of a display of the registration stamp binary image at the time of seal stamp degradation detection, a reading stamp multi-value image, and a seal stamp collation result image. It is a figure which shows the example of a display of the registration stamp binary image at the time of seal stamp degradation detection, a reading stamp multi-value image, and a seal stamp collation result image. It is a figure which shows an example of the hardware constitutions for implement | achieving the seal | sticker collation apparatus in embodiment.

  Hereinafter, embodiments will be described with reference to the drawings. First, an example of a seal collation system including a seal collation apparatus that implements a seal degradation determination program according to an embodiment will be described with reference to FIG. The seal stamp verification system 1 includes a seal impression control device 2, an image reading device 3, a seal impression database 4, and a display device 5. The imprint control device 2 is connected to the image reading device 3 and the imprint database 4. The imprint control device 2 further includes an imprint search device 20 and an imprint collation device 21.

  The image reading device 3 reads an imprint of a reading mark stamped on a form or the like when performing seal imprint collation (also referred to as seal collation). The image reading device 3 is, for example, an OHR (overhead reader) or a scanner that reads a reading mark of a form placed on a reading table (not shown) by a camera (not shown) and reads it as color image data.

  The seal imprint database 4 stores a seal image of a registered seal registered in advance in association with customer account identification information including a customer name, address, account number, store number, and the like. The imprint database 4 may be in the imprint control apparatus 2.

  The display device 5 displays various types of information, and displays, for example, seal stamp deterioration determination results (images shown in FIGS. 18A to 18C, FIGS. 3A, and 3B). The display device 5 may display an input screen for inputting information (ID number, password, etc.) necessary for operating the seal imprint control device 2. The display device 5 may be integrated with the imprint control device 2, or may be connected instead of being integrated.

  The imprint control device 2 is a main device that performs imprint collation at a terminal used by an operator (for example, a staff member of a financial institution) when performing imprint collation. As described above, the imprint search device 20 and the imprint collation device. 21.

  The imprint search device 20 stores an account number and a seal image of a registration stamp in association with each other using, for example, an account number on a form input via an input unit (such as a keyboard) (not shown) of the imprint verification device 21 as a key. The imprint database 4 is searched. The imprint search device 20 reads the imprint image of the registered mark from the imprint database 4 when there is an imprint image of the corresponding registered mark as a result of the search. The imprint search device 20 records the read imprint image (registered imprint binary image) of the registered stamp as imprint image binary data in the imprint image management table 40 stored in the storage unit 21f described later. The imprint image management table 40 will be described later.

  The imprint collation device 21 collates the imprint image of the read stamp read by the image reading device 3 with the imprint image of the registered stamp acquired by the imprint search device 20 and causes the display device 5 to display the collation result. Also, the seal collation device 21 determines whether or not there is a seal deterioration based on the collation result. A method for determining the deterioration of the seal will be described later.

  Here, an example of a functional block of the seal collation apparatus 21 in the embodiment will be described with reference to FIG. The imprint verification device 21 includes an imprint multi-value image acquisition unit 21a, an imprint image overlay processing unit 21b, an imprint verification image generation unit (also referred to as a comparison setting unit) 21c, and a mismatch information totaling unit (also referred to as a setting unit and a determination unit) 21d. , A seal deterioration warning image generating unit 21e and a storage unit 21f. Determination of deterioration of the seal is performed by cooperation of these functional blocks.

  The imprint multi-valued image acquisition unit 21 a acquires an imprint image of a reading stamp read by the image reading device 3. More specifically, the imprint multi-value image acquisition unit 21a acquires an imprint multi-value image (read imprint multi-value image) of the read mark read by the image reading device 3, and stores it in the imprint image management table 40 of the storage unit 21f. Store as seal image binary data.

  The imprint image overlay processing unit 21b acquires the read imprint multi-value image stored by the imprint image multi-value image acquisition unit 21a and the registered imprint binary image corresponding to the read imprint multi-value image from the imprint image management table 40. . The imprint image overlay processing unit 21b binarizes the acquired read imprint multilevel image, that is, converts the read imprint multilevel image with shading into two gradations of white and black, and converts the read imprint binary image into a binary image. Generated and stored as binary data in the seal image management table. The gradation indicates the level (degree) of shading. In the case of a binary image, the gradation is two gradations of white and black. As described above, the binarization process here is a process for converting a read and imprinted multilevel image into two gradations of white and black, and is performed using a known binarization technique. Description is omitted.

  The imprint image overlay processing unit 21b superimposes the registered imprint binary image and the read imprint binary image, and the center coordinates of the read imprint binary image (read imprint image collation center coordinate ( Xdo, Ydo)). At this time, the center coordinates (Xgo, Ygo) of the registered stamp binary image are also calculated. The imprint image overlay processing unit 21b calculates the rotation angle rdo of the read imprint binary image when the coincidence rate is maximized. The rotation angle rdo indicates how much the read seal imprint binary image has been rotated with reference to the position at the time of reading. Note that the calculation of the center coordinates and the rotation angle is based on a method in the conventional image superposition technique, and thus the details are omitted.

  The calculated read imprint image collation center coordinates (Xdo, Ydo), read imprint binary image rotation angle rdo, and registered imprint binary image center coordinates (Xgo, Ygo) are collation results described later stored in the recording unit 21f. It is stored in the information table 50.

  The imprint verification image generation unit 21c, the center coordinates (Xgo, Ygo) of the registered imprint binary image recorded in the verification result information table 50, the read imprint image verification center coordinates (Xdo, Ydo), and the read imprint image rotation angle rdo. And get. The imprint verification image generation unit 21c acquires the center coordinates (Xgo, Ygo) of the read imprint image management table acquired from the imprint image management table and the center coordinates (Xgo, Ygo) of the acquired registered imprint binary image. The read imprint binary image is rotated by the rotation angle rdo to generate a collated read imprint binary image. The generated read imprint binary image for verification is stored as binary data in the imprint image management table 40.

  The imprint verification image generation unit 21c further determines whether or not the corresponding pixels (the pixels to be compared) in the registered imprint binary image and the read imprint binary image match with each other in the black pixel or the white pixel. That is, it is determined whether or not the gradation is different between the pixels.

  In the case where black pixels or white pixels match (tones match), the seal impression image generation unit 21c stores 0 in a mismatch flag of a matching result pixel management table 60 described later. On the other hand, if the black pixels or the white pixels do not match (the gradations do not match), the imprint verification image generation unit 21c determines whether the pixel of the read imprint binary image is a black pixel. If it is a black pixel, 1 is stored in the mismatch flag of the matching result pixel management table 60. In this case, since the pixel of the registered seal imprint binary image is a white pixel, it is considered that the seal is clogged (degradation of the seal) or bleeding.

  When the seal impression image generation unit 21c determines that the pixel is a white pixel, −1 is stored in the mismatch flag of the matching result pixel management table 60. In this case, since the pixel of the registered seal imprint binary image is a black pixel, it seems that the seal is missing or damaged (degradation of the seal) or rubbed. Here, when the gradations do not match, it is determined whether or not the pixel of the read imprint binary image is a black pixel, but whether or not the pixel of the read imprint binary image is a white pixel is determined. You may make it determine.

  The mismatch flag is obtained by comparing the gradation of the pixel of the registered imprint binary image with the gradation of the pixel of the scanned imprint binary image and digitizing the comparison result. For example, when the pixel of the registered imprint binary image is a black pixel and the pixel of the read imprint binary image to be compared is a white pixel, the value of the mismatch flag is set to a negative value (for example, −1). Negative values correspond to missing / damaged or rubbed seals. Further, when the pixel of the registered imprint binary image is a white pixel and the pixel of the read imprint binary image to be compared is a black pixel, the value of the mismatch flag is set to a positive value (for example, +1). A positive value corresponds to clogging or bleeding of the seal. In addition, when the contrasted pixels match in the black pixel or the white pixel, the value of the mismatch flag is set to 0. The value (-1, +1, 0) stored (set) in the mismatch flag is also referred to as a predetermined value.

  After storing the mismatch flag for all pixels, the seal impression image generation unit 21c superimposes the registered seal image binary image and the read imprint binary image for verification, and generates an image match result image based on the stored mismatch flag. . Specifically, the seal impression image generation unit 21c sets other pixels that are not white or black for pixels whose mismatch flag value is not 0, for example, gray (gray), and matches pixels whose mismatch flag value is 0. A seal impression result image having the gradation (white or black) is generated. The generated seal impression result image is stored as binary data in the seal image management table 40.

  Since the contents of the operation of the discrepancy information totaling unit 21d are partially different between the first embodiment and the second embodiment described later, different operations will be described for each embodiment.

Example 1
The mismatch information aggregating unit 21d determines whether or not the mismatch flag in the matching result pixel management table 60 has a value other than 0. If there is a value other than 0, the corresponding pixel (coordinate) in the mismatch information table 70 described later. The value of the mismatch flag is added to the mismatch information. If there is no corresponding pixel (coordinate), new coordinate data is generated in the mismatch information table 70, and the value of the mismatch flag is stored.

  The mismatch information totaling unit 21d determines whether the mismatch information value in the mismatch information table 70 is equal to or greater than the mismatch determination threshold Tj, or whether the mismatch information value is equal to or less than -Tj. The mismatch determination threshold value Tj is recorded in an operating environment table 80 to be described later, and is a predetermined threshold value that serves as a reference for determining the deterioration of a seal.

  As a result of the above determination, if the value of the mismatch information is equal to or greater than the mismatch determination threshold Tj or the value of the mismatch information is equal to or less than −Tj, the mismatch information totaling unit 21d sets true to the deterioration flag of the mismatch information table 70. On the other hand, if the value of the mismatch information is not equal to or greater than the mismatch determination threshold value Tj, or the value of the mismatch information is not equal to or less than −Tj, the mismatch information totaling unit 21d sets false in the deterioration flag of the mismatch information table 70.

(Example 2)
The mismatch information totaling unit 21d determines whether or not the mismatch flag in the matching result pixel management table 60 has a value other than 0. When there is a value other than 0, the discrepancy information totaling unit 21d determines the number of peripheral pixels having a value that matches the discrepancy flag value of the pixel (coordinates) in the peripheral pixel (peripheral coordinates) of the pixel (coordinates). The number Fc) is counted. A peripheral pixel refers to a pixel adjacent to the pixel, for example.

  The mismatch information totaling unit 21d determines whether or not the counted Fc is equal to or greater than the mismatch count threshold Tc recorded in the operation environment table 80. If the counted Fc is equal to or greater than Tc, the mismatched information totaling unit 21d determines the corresponding pixel (coordinate) of the mismatch information table 70. The value of the mismatch flag is added to the mismatch information.

  The operation of the discrepancy information counting unit 21d that is different between the first embodiment and the second embodiment has been described above. The operation of the discrepancy information counting unit 21d described below is common to the respective embodiments.

  The disagreement information totaling unit 21d divides the seal image into a plurality of grids (also referred to as segments), counts the number of deterioration flags = true for each grid, and determines the deterioration that the counted number of deterioration flags is stored in the operating environment table 80. It is determined whether or not the threshold value Tr is smaller. If it is smaller, “false” is set in the seal deterioration flag of the collation result information table 50, and if it is not smaller, “true” is set in the seal deterioration flag of the collation result information table 50. The fact that the seal stamp deterioration flag is set to true means that the seal stamp has deteriorated.

  The mismatch information aggregating unit 21d does not divide the imprint image into grids, and when true is stored in the degradation flag of the mismatch information table 70 for each pixel, true is stored in the seal degradation flag of the verification result information table 50. May be set.

  The seal deterioration deterioration warning image generation unit 21e acquires information (coordinates and mismatch information) in the mismatch information table 70, plots the values of mismatch information for each coordinate, and generates a seal deterioration warning image (three-dimensional image). And stored as binary data in the seal image management table 40. Specifically, the seal stamp deterioration warning image generation unit 21e plots the values of the mismatch information corresponding to the x coordinate and the y coordinate of the mismatch information table 70 as the values of the Z coordinate.

  An example of the seal deterioration warning image is shown in FIGS. 3A and 3B. In the case of the coordinates (−50, −50) of the mismatch information table 70, the value of the corresponding mismatch information is 0. Therefore, Z = 0 in the coordinates (-50, -50). In the case of coordinates (−42, −10), the value of the corresponding mismatch information is 11. Therefore, Z = 11 at the coordinates (−42, −10). Thus, by plotting the value of the mismatch information for all coordinates, a three-dimensional image having an uneven shape as shown in FIG. 3A is generated.

  The image example shown in FIG. 3A is an imprint of the character “middle”, which has a convex shape in the upper right portion and a concave shape in the lower central portion. The convex shape indicates that the corresponding pixel of the registered imprint binary image is a white pixel and the corresponding pixel of the read imprint binary image is a black pixel. That is, it indicates that there is bleeding due to clogging of the seal. On the other hand, the concave shape indicates that the corresponding pixel of the registered imprint binary image is a black pixel, and the corresponding pixel of the read imprint binary image is a white pixel. That is, it indicates that there is rubbing due to missing seals.

  In addition, when generating an image as shown in FIG. 3A, the color is changed between a plot of the mismatch information value corresponding to the degradation flag true in the mismatch information table 70 and a plot of the mismatch information value corresponding to false. You may enable it to grasp more visually.

  As described above, by displaying the seal impression image three-dimensionally, it is possible to express the deteriorated portion and the deterioration content of the seal stamp by drawing in the height direction. In addition, the size of the suspected place can be expressed by the size in the height direction, and the operator can intuitively understand which part of the seal is deteriorated and how. An image as shown in FIG. 3B may be generated and displayed. The image shown in FIG. 3B is a planar image (two-dimensional image), and the three-dimensional uneven portion of the image shown in FIG. 3A is shown using shades of color.

  The storage unit 21f stores various kinds of information (for example, a seal image management table 40) necessary for determination of seal deterioration.

Here, each table mentioned above memorize | stored in the memory | storage part 21f is demonstrated.
The imprint image management table 40 is a table that records various images as binary data. For example, as shown in FIG. 4, the imprint image management table 40 includes items of an index, an imprint image type, and an imprint image binary data. The index is identification information for identifying an image. For example, a desired image can be acquired from the imprint image management table 40 by designating the index. The imprint image type indicates the type of image to be stored. For example, when a registered imprint binary image read from the imprint database 4 by the imprint search device 20 is stored, the name of the registered imprint binary image is recorded in the imprint image type. The imprint image binary data indicates binary data of the stored image. The configuration of the seal image management table 40 is not limited to this, and may include other items.

  The collation result information table 50 is a table that records values such as the read imprint image collation center coordinates calculated by the imprint image overlay processing unit 21b, and includes item names and setting values as shown in FIG. The item names are the X-coordinate Xdo and Y-coordinate Ydo of the read imprint image collation center calculated by the imprint image overlay processing unit 21b, the rotation angle (read imprint image rotation angle) rdo of the read imprint binary image, and the registered imprint binary value. It consists of the X coordinate Xgo and Y coordinate Ygo of the center of the image, and a seal deterioration flag. The setting value is a value held by the item stored in the item name. Here, since the setting value of the read imprint image rotation angle rdo is 9, it indicates that the read imprint binary image has been rotated by 9 degrees with respect to the reading position. Further, since true is stored in the set value of the seal stamp deterioration flag, this example indicates that it is determined that the seal stamp has deteriorated. If the discrepancy information totaling unit 21d determines that the seal is not deteriorated, false is stored.

  In the matching result pixel management table 60, the pixels of the read imprint binary image to be compared with the pixels of the registered imprint binary image match with each other in black pixels or white pixels. It is a table which shows whether it is a white pixel for every pixel. As shown in FIG. 6, the collation result pixel management table 60 includes pixel coordinates (X coordinate, Y coordinate) and a mismatch flag. For example, in a certain pixel (X coordinate is −50, Y coordinate is −50), both the registered imprint binary image and the read imprint binary image are matched in black pixels or white pixels, and the mismatch flag is 0. Is stored. On the other hand, in a certain pixel (X coordinate is −50, Y coordinate is −49), the pixel of the registered imprint binary image is a black pixel, and the pixel of the read imprint binary image is a white pixel, which does not match. 1 is stored in the mismatch flag. The verification result pixel management table 60 may be initialized (all cleared) when the seal deterioration determination is completed once.

  The mismatch information table 70 is a table in which the value of the mismatch flag is added to the value of the mismatch information every time stamp imprinting is performed. As shown in FIG. 7, the mismatch information table 70 includes pixel coordinates (X coordinate, Y coordinate), mismatch information, and a degradation flag. In the mismatch information table 70, mismatch information for all the pixels of the verification target image is recorded.

  The mismatch information is information in which the value of the mismatch flag is added every time the seal impression is collated. That is, the mismatch information indicates a result (accumulated value) in which the value of the mismatch flag is continuously added. For example, the disagreement information is 0 for a certain pixel (X coordinate is −50, Y coordinate is −50). This indicates whether there was only a pixel match in the past, or it was determined that the pixel matched and did not match, but the mismatch information became 0 as a result of addition. Also, the mismatch information is 11 for a certain pixel (X coordinate is −42, Y coordinate is −10). This indicates that in the past, it was often determined that the pixels do not match.

  The deterioration flag indicates a comparison result between the value of the mismatch information and the mismatch determination threshold value Tj of the operating environment table 80. Specifically, true is set when the value of the mismatch information is greater than or equal to the mismatch determination threshold Tj or less than or equal to −Tj, and false is set otherwise. When the deterioration flag is true, it indicates that there is a possibility that the corresponding pixel portion has deteriorated. In the example shown in FIG. 7, there is a possibility that deterioration occurs in a certain pixel (X coordinate is −42, Y coordinate is −10) and a certain pixel (X coordinate is −42, Y coordinate is −9). It is shown that.

  The operating environment table 80 is a table for recording threshold values used for various determinations. The operating environment table 80 is composed of item names and set values as shown in FIG. The item name includes a mismatch determination threshold value Tj, a mismatch count threshold value Tc, a mismatch determination grid width lg, a seal stamp deterioration determination threshold value Tr, a width Wg of a registered stamp binary image, and a height Hg of a registered stamp binary image. The setting value is a value held by the item stored in the item name.

  The mismatch judgment threshold value Tj is a threshold value used for setting true or false in the deterioration flag of the mismatch information table 70.

  The mismatch count threshold value Tc is a threshold value (also referred to as an addition threshold value) used in the second embodiment, and is a threshold value for determining whether or not the value of the mismatch flag is added to the mismatch information in consideration of the peripheral pixels of the pixel. It is.

  The mismatch determination grid width is the width of the grid divided when setting the seal deterioration flag. In this example, since the mismatch determination grid width is only lg, the grid has the same vertical width and horizontal width. That is, the grid has a square shape. The shape of the grid is not limited to a square, but may be a rectangle or the like. In this case, it is necessary to prepare two values for the grid width, the vertical width and the horizontal width.

  Further, in this example, the value of the width Wg of the registered imprint binary image and the value of the height Hg of the registered imprint binary image are the same 100, but different values can be used.

  Further, in this example, the value of the width Wg of the registered imprint binary image and the value of the height Hg of the registered imprint binary image are acquired from the operation environment table 80, but binary data of the registered imprint binary image is obtained by program processing. May be obtained from

  Next, the flow of seal stamp deterioration determination in the stamp control apparatus according to the embodiment will be described with reference to FIG.

  First, the imprint search device 20 searches, for example, an imprint database 4 that stores an account number and a registered imprint binary image (registered imprint binary image) in association with each other using the account number as a key, It is acquired and stored in the seal image management table 40 (step S901).

  The imprinted multi-valued image acquisition unit 21a acquires the read imprinted multi-valued image read by the image reading device 3 and stores it in the imprinted image management table 40 (step S902).

  The imprint image overlay processing unit 21b performs an imprint image overlay process (step S903). The imprint image overlay process will be described later.

  The imprint verification image generation unit 21c performs an imprint verification result image generation process (step S904). The seal impression result image generation process will be described later.

  The mismatch information totaling unit 21d performs a mismatch information totaling process (step S905). The mismatch information aggregation process will be described later.

  Further, the mismatch information totaling unit 21d performs a seal deterioration determination process (step S906). The seal deterioration determination process will be described later.

  Further, the discrepancy information totalization unit 21d acquires the seal stamp deterioration flag from the verification result information table 50 after the seal stamp deterioration determination process (step S907).

  Further, the seal stamp deterioration warning image generation unit 21e acquires the registered seal stamp binary image, the read stamp multi-value image, and the seal stamp comparison result image from the seal image management table 40 and displays them on the display device 5 (step S908). Here, FIG. 18A shows an example of a registered stamp binary image, a read stamp multi-value image, and a seal stamp comparison result image displayed on the display device 5 when the acquired seal stamp deterioration flag is false (when seal stamp deterioration is not detected). Show. In FIG. 18A, seal deterioration is not detected, and confirmation of the deteriorated part is unnecessary, so the deteriorated part confirmation icon 1800 is displayed so as not to be pressed.

  On the other hand, an example of a registered imprint binary image, a read imprint multi-value image, and an imprint verification result image displayed on the display device 5 when the acquired seal deterioration flag is true (when seal deterioration is detected) is shown in FIGS. 18B and 18C. Shown in In FIG. 18B and FIG. 18C, the seal degradation is detected, and the degradation location confirmation icons 1801 and 1802 are darkly displayed so that the degradation location can be confirmed. The difference between FIG. 18B and FIG. 18C is whether the display indicating that the seal is deteriorated (with seal deterioration) is a dialog display or a text display on the screen. In the case of dialog display, when an OK icon 1803 is pressed, a transition to a seal deterioration warning image is made. In addition, in the seal image comparison result image at the time of detecting the seal deterioration, the portion where the seal deterioration is detected is, for example, gray (gray) as described later, and it is possible to visually grasp the deterioration portion. .

  The mismatch information counting unit 21d determines whether or not the acquired seal deterioration flag is true (there is seal deterioration) (step S909).

  When the seal stamp deterioration flag is true (Yes in step S909), the seal stamp deterioration warning image generating unit 21e performs a seal stamp deterioration warning image generation process (step S910). Thereafter, when the deteriorated part confirmation icons 1801 and 1802 are pressed, a confirmation screen of a part that is suspected of being deteriorated in the seal (a seal deterioration deteriorated part confirmation screen), that is, the imprint deterioration warning image shown in FIG. 3A or FIG. It is acquired from the table 40 and displayed on the display device 5 (step SS911). If the seal stamp deterioration flag is not true (No in step S909), that is, if it is false, it is determined that there is no seal stamp deterioration, and the seal stamp deterioration determination is terminated without performing the seal stamp deterioration warning image generation process.

Next, a subroutine for the imprint image overlay process will be described with reference to FIG.
The imprint image overlay processing unit 21b acquires the registered imprint binary image from the imprint image management table 40 (step 1001). For example, an index value (value = 0) is designated, and a registered stamp binary image corresponding to the designated index value is acquired. Note that when another image is acquired from the seal image management table 40, it may be acquired by designating an index value in the same manner.

  The imprint image overlay processing unit 21b acquires the read imprint multi-value image from the imprint image management table 40 (step S1002). The imprint image overlay processing unit 21b binarizes the acquired read imprint multi-valued image to generate a read imprint binary image (step S1003), and stores the generated read imprint binary image in the imprint image management table 40. (Step S1004).

  The imprint image overlay processing unit 21b acquires the registered imprint binary image and the read imprint binary image stored in the imprint image management table 40, and superimposes the images so that the matching rate is maximized. The imprint image overlay processing unit 21b calculates the collation center coordinates (Xdo, Ydo) of the read imprint binary image after being superimposed, and calculates the center coordinates (Xgo, Ygo) of the registered imprint binary image ( In step S1005), the respective coordinates are stored in the collation result information table 50 (step S1006).

  Further, the imprint image overlay processing unit 21b calculates a read imprint image rotation angle rdo of the read imprint binary image in a state where the coincidence ratio is maximized (step S1007), and the calculated read imprint image rotation is performed. The angle rdo is stored in the verification result information table 50 (step S1008). Specifically, the imprint image overlay processing unit 21b superimposes the registered imprint binary image on the registered imprint binary image so that the matching rate is maximized with reference to the reading position at the time of reading the read imprint binary image before superimposition. To calculate how much the read imprint binary image is rotated, that is, the rotation angle.

  Next, a subroutine for the seal impression result image generation processing will be described with reference to FIGS. 11A and 11B.

  The imprint verification image generation unit 21c acquires a registered imprint binary image from the imprint image management table 40 (step S1101), and acquires a read imprint binary image from the imprint image management table 40 (step S1102).

  The imprint image collation image generation unit 21c acquires the center coordinates (Xgo, Ygo) of the registered imprint binary image from the collation result information table 50 (step S1103), and acquires the read imprint binary image collation center coordinates (Xdo, Ydo). (Step S1104), and the read imprint image rotation angle rdo is acquired (Step S1105).

  The imprint collation image generation unit 21c aligns the read imprint binary image collation center coordinates (Xdo, Ydo) with the center coordinates (Xgo, Ygo) of the acquired registered imprint binary image, and reads the read imprint image rotation angle rdo. The value image is rotated to generate a collation reading imprint binary image (step S1106). The imprint verification image generation unit 21c stores the generated read imprint binary image for verification in the imprint image management table 40 (step S1107).

  Here, the seal impression image generation unit 21c compares the pixel of the registered seal binary image with the pixel of the read seal binary image corresponding to the pixel, and stores the value of the mismatch pixel flag for each pixel. For this purpose, the width Wg and height Hg of the registered seal binary image are acquired from the operating environment table 80 (step S1108).

  An example of the comparison method will be described with reference to FIG. The imprint verification image generation unit 21c performs determination while moving vertically from the lower left pixel 1200 of the registered imprint binary image (for example, the X coordinate is −50 and the Y coordinate is −50) in the arrow direction (the Y coordinate increases direction). Thus, the value of the mismatch flag is stored in order. In this example, the width Wg and height Hg of the registered seal binary image are both set to 100, and the coordinates of the origin are set to (0, 0). Therefore, the X coordinate range is -50 to 50, and the Y coordinate range is also -50. 50.

  When the value of the mismatch flag of the pixel 1201 at the upper left of the registered imprint binary image (for example, the X coordinate is −50 and the Y coordinate is 50) has been stored, the lowest pixel 1200 (immediately below) of the registered imprint binary image ( The X coordinate returns to -50 and the Y coordinate returns to -50). Similarly, the value of the mismatch flag is stored while moving vertically in the direction of the arrow from the pixel 1202 (X coordinate is −49, Y coordinate is −50) immediately adjacent to the returned pixel 1200. This is repeated until the last pixel 1203 (X coordinate is 50, Y coordinate is 50).

  That is, in loop 1, loop processing is performed with the initial value of counter i set to −Wg / 2 and the loop condition set to i between Wg / 2 and lower. In loop 2, the initial value of counter j is set to −Hg / 2, and loop processing is performed. Loop processing is performed with the condition that j is equal to or less than Hg / 2.

  The imprint verification image generation unit 21c determines whether or not the pixel of the registered imprint binary image coordinate (Xgo + i, Ygo + j) matches the pixel of the read imprint binary image coordinate (Xdo + i, Ydo + j) (step S1109). . Matching pixels means that both contrasting pixels are black pixels or white pixels. If the compared pixels match (Yes in step S1109), the seal impression collation image generation unit 21c stores 0 in the mismatch flag of the coordinates (Xgo + i, Ygo + j) of the registered seal binary image in the collation result pixel management table 60. (Step S1110). The fact that 0 is stored in the mismatch flag indicates that both pixels to be compared are black pixels or white pixels.

  On the other hand, if the compared pixels do not match (No in step S1109), the imprint verification image generation unit 21c determines whether the pixel of the read imprint binary image is a black pixel (step S1111). When the pixel of the read imprint binary image is a black pixel (Yes in step S1111), the imprint collation image generation unit 21c does not match the coordinates (Xgo + i, Ygo + j) of the registered imprint binary image in the collation result pixel management table 60. 1 is stored (set) in (step S1112). The fact that 1 is stored in the mismatch flag indicates that the pixel to be compared is a white pixel.

  On the other hand, when the pixel of the read imprint binary image is not a black pixel (No in step S1111), the imprint collation image generation unit 21c does not match the coordinates (Xgo + i, Ygo + j) of the registered imprint binary image in the collation result pixel management table 60. -1 is stored (set) in the flag (step S1113). The fact that -1 is stored in the mismatch flag indicates that the pixel to be compared is a black pixel.

  When the storage is completed, the seal impression image generation unit 21c counts up the counter j of the loop 2 (step S1114), and repeats the above processing while satisfying the loop 2 loop condition. On the other hand, when the loop condition of the loop 2 is no longer satisfied, the seal image comparison image generation unit 21c counts up the counter i of the loop 1 (step S1115), and repeats the above process while the loop condition of the loop 1 is satisfied. . On the other hand, when the loop condition of loop 1 is no longer satisfied, the imprint collation image generation unit 21c superimposes the registered imprint binary image and the collation read imprint binary image, and information (coordinates and mismatches) in the collation result pixel management table 60 A seal impression result image is generated based on (flag) (step S1116).

  Specifically, when the seal impression image generation unit 21c generates a seal impression result image by superimposing the registered seal image binary image and the matching read seal image binary image, a pixel having a mismatch flag value of 1 or −1. Is a gray pixel. For a pixel with a mismatch flag value of 0, an imprint matching result image is generated as a black pixel when matched with a black pixel and as a white pixel when matched with a white pixel. Thereby, it becomes possible to visually grasp the mismatched portion. Then, the imprint verification image generation unit 21c stores the generated imprint verification result image in the imprint image management table 40 (step S1117).

  Next, a sub-routine of the mismatch information aggregation process will be described with reference to FIGS. 13A, 13B, 14A, and 14B.

  The mismatch information tabulation process flow shown in FIGS. 13A and 13B is the process flow of the first embodiment, and the mismatch information tabulation process flow shown in FIGS. 14A and 14B is the process flow of the second embodiment.

  First, the subroutine of the discrepancy information totaling process of the first embodiment will be described with reference to FIGS. 13A and 13B.

  The mismatch information totaling unit 21d acquires the mismatch determination threshold value Tj from the operating environment table 80 in order to set the deterioration flag of the mismatch information table 70 (step S1301), and sets the width Wg and height Hg of the registered imprint binary image. Obtain (step S1302).

  The mismatch information aggregating unit 21d performs loop processing with the initial value of the counter i set to −Wg / 2 in the loop 1 and the loop condition set to i between Wg / 2 and lower. In the loop 2, the initial value of the counter j is set to −Hg. / 2 and loop processing is performed with a loop condition between j and Hg / 2 or less. The counter, loop condition, and count-up in this loop process are the same as those in the loop process in the above-described seal impression result image generation process.

  The mismatch information totaling unit 21d acquires the value of the mismatch flag of the coordinates (i, j) from the matching result pixel management table 60 (step S1303). The mismatch information totaling unit 21d determines whether or not the acquired mismatch flag value is not 0 (step S1304). When the value of the mismatch flag is not 0 (Yes in step S1304), that is, when the compared pixels do not match (in the case of a value indicating pixel mismatch), the mismatch information totaling unit 21d has coordinates (i, j) of the mismatch information table 70. The value of the mismatch flag at coordinates (i, j) is added to the value of the mismatch information (step S1305). On the other hand, if the value of the mismatch flag is 0 (No in step S1304), that is, if the compared pixels match, the process proceeds to step S1306.

  Note that here, when the value of the mismatch flag is other than 0, the value of the mismatch flag is added to the mismatch information. However, the determination process of step S1304 is eliminated, and the acquired mismatch flag value is directly used as the mismatch information. You may make it add to a value. This is because when the value of the mismatch flag is 0, the value of the mismatch information does not change even if it is added to the value of the mismatch information. Similarly, in step S1405 of FIG. 14A described later, the determination process of step S1405 may be omitted, and the process of step S1406 may be performed after obtaining the mismatch flag in step S1404.

  The mismatch information totaling unit 21d determines whether the value of the mismatch information of the coordinates (i, j) in the mismatch information table 70 is equal to or greater than the mismatch determination threshold Tj (step S1306). That is, it is determined whether or not the contrasted pixels are often determined to be inconsistent. Note that the value of the mismatch information is increased or decreased by adding the mismatch flag values (0, 1, −1), and thus is not necessarily the same as the value of the number of times that the compared pixels are determined to be mismatched. . For example, if the number of times that the discrepancy is determined to be 10 is 5 and the discrepancy flag value is 1 of 5 and the remaining 5 times is the discrepancy flag value being -1, the value of the discrepancy information Becomes 0. Thus, the value of the mismatch information is not necessarily the same as the number of times that the mismatch is determined.

  When the value of the mismatch information is greater than or equal to the mismatch determination threshold Tj or less than or equal to −Tj (Yes in step S1306), the mismatch information totaling unit 21d sets true to the deterioration flag of the coordinates (i, j) in the mismatch information table 70 ( Step S1307). On the other hand, if the value of the mismatch information is not greater than or equal to the mismatch determination threshold Tj or less than −Tj (No in step S1306), the mismatch information totaling unit 21d sets false to the deterioration flag of the coordinates (i, j) of the mismatch information table 70. (Step S1308).

  When the setting of the deterioration flag is finished, the mismatch information totaling unit 21d counts up the counter 2 of the loop 2 (step S1309), and repeats the above process while satisfying the loop 2 loop condition. On the other hand, when the loop condition of loop 2 is no longer satisfied, the mismatch information counting unit 21d counts up the counter i of loop 1 (step S1310), and repeats the above process while the loop condition of loop 1 is satisfied. On the other hand, when the loop condition of loop 1 is not satisfied, the mismatch information totaling unit 21d ends the mismatch information totaling process.

  Next, a sub-routine of the mismatch information totaling process according to the second embodiment will be described with reference to FIGS. 14A and 14B. In the mismatch information totaling process of the second embodiment, the value of the mismatch flag is added to the value of the mismatch information in consideration of the value of the mismatch flag of the peripheral pixels (coordinates) of the pixel (coordinates) that is the target of the mismatch process. It is processing. The mismatch information totaling process according to the first embodiment is a process of adding the value of the mismatch flag of the pixel that is the target of the mismatch processing of the mismatch information to the value of the mismatch information, and does not consider the value of the mismatch flag of the surrounding pixels. . With the mismatch information tabulation process of the second embodiment, it is possible to improve the accuracy of the deterioration determination without picking up fine dust.

  The mismatch information totaling unit 21d acquires the mismatch determination threshold Tj from the operating environment table 80 (step S1401) and the mismatch count threshold Tc (step S1402) in order to set the deterioration flag of the mismatch information table 70. Also, the discrepancy information totalization unit 21d acquires the width Wg and the height Hg of the registered stamp binary image from the operating environment table 80 (step S1403).

  The mismatch information aggregating unit 21d performs loop processing with the initial value of the counter i set to −Wg / 2 in the loop 1 and the loop condition set to i between Wg / 2 and lower. In the loop 2, the initial value of the counter j is set to −Hg. / 2 and loop processing is performed with a loop condition between j and Hg / 2 or less. The counter, loop condition, and count up in this loop process are the same as those in the loop process in the mismatch information aggregation process of the first embodiment.

  The mismatch information totaling unit 21d acquires the value of the mismatch flag of the coordinates (i, j) from the matching result pixel management table 60 (step S1404). The mismatch information totaling unit 21d determines whether or not the acquired mismatch flag value is not 0 (step S1405). If the value of the mismatch flag is 0 (No in step S1405), the process proceeds to step S1410.

  On the other hand, if the value of the mismatch flag is not 0 (Yes in step S1405), the mismatch information totaling unit 21d acquires the value of the mismatch flag of the peripheral coordinates of the coordinates (i, j) (step S1406). Here, the peripheral coordinates are coordinates adjacent to the target coordinates (i, j), for example, and the coordinates (i-1, j-1), (i, j-1), (i + 1, j-1), (I-1, j), (i + 1, j), (i-1, j + 1), (i, j + 1), (i + 1, j + 1).

  The mismatch information totaling unit 21d counts the number of peripheral coordinates having a mismatch flag that matches the value of the mismatch flag of the coordinates (i, j), that is, the mismatch number Fc (step S1407). The mismatch information totaling unit 21d determines whether or not the mismatch number Fc is greater than or equal to the mismatch count threshold Tc (step S1408). When the mismatch number Fc is equal to or greater than the acquired mismatch count threshold value Tc (Yes in step S1408), the mismatch information totaling unit 21d uses coordinates (i, j) as the mismatch information value of the coordinates (i, j) in the mismatch information table 70. Are added (step S1409). On the other hand, if the mismatch number Fc is not equal to or greater than the acquired mismatch count threshold Tc (No in step S1408), the process proceeds to step S1410.

  The mismatch information totaling unit 21d determines whether the value of the mismatch information of the coordinates (i, j) in the mismatch information table 70 is greater than or equal to the mismatch determination threshold Tj or less than -Tj (step S1410).

  When the value of the mismatch information is greater than or equal to the mismatch determination threshold Tj or less than or equal to −Tj (Yes in step S1410), the mismatch information totaling unit 21d sets true to the deterioration flag of the coordinates (i, j) in the mismatch information table 70 ( Step S1411). On the other hand, if the value of the mismatch information is not greater than or equal to the mismatch determination threshold Tj or less than -Tj (No in step S1410), the mismatch information totaling unit 21d sets false to the deterioration flag of the coordinates (i, j) of the mismatch information table 70. (Step S1412).

  When the setting of the deterioration flag is finished, the mismatch information totaling unit 21d counts up the counter 2 of the loop 2 (step S1413), and repeats the above process while satisfying the loop 2 loop condition. On the other hand, when the loop condition of loop 2 is no longer satisfied, the mismatch information counting unit 21d counts up the counter i of loop 1 (step S1414), and repeats the above process while the loop condition of loop 1 is satisfied. On the other hand, when the loop condition of loop 1 is not satisfied, the mismatch information totaling unit 21d ends the mismatch information totaling process.

  Next, the seal deterioration determination processing subroutine will be described with reference to FIGS. 15A and 15B.

  The discrepancy information totaling unit 21d acquires the discrepancy determination grid width lg from the operating environment table 80 in order to set the seal deterioration flag indicating the presence / absence of seal deterioration by dividing the registered seal imprint binary image into a plurality of grids (step S1501). At the same time, a deterioration determination threshold value Tr is acquired (step S1502).

  The grid refers to one area obtained by dividing the registered seal impression binary image with a certain width and height. An example of the grid is shown in FIGS. 16A and 16B. In the example shown in FIG. 16A, the width and height of the grid 1600 are the same value lg, that is, the grid 1600 is a square, but the width and height may be different values to form a rectangular grid. Also, as shown in FIG. 16B, the grid size is not fixed. For example, the grid 1601 is enlarged near the center of the registered imprint binary image (the portion with the imprint), and near the end of the registered imprint binary image (the imprint is imprinted). The grid 1602 may be made smaller (lgz> lg) in the non-part).

  The discrepancy information totalization unit 21d acquires the width Wg and the height Hg of the registered stamp binary image from the operating environment table 80 (step S1503).

  The mismatch information aggregating unit 21d performs loop processing with the initial value of the counter i set to −Wg / 2 in the loop 1 and the loop condition set to i between Wg / 2 and lower. In the loop 2, the initial value of the counter j is set to −Hg. / 2 and loop processing is performed with a loop condition between j and Hg / 2 or less. The counter, loop condition, and count-up in this loop process are the same as those in the loop process in the mismatch information aggregation process.

  The mismatch information totaling unit 21d initializes the seal deterioration determination counter C to 0 (step S1504).

  The mismatch information totaling unit 21d performs a loop process for counting how many pixels (coordinates) the deterioration flag = true in the grid. That is, in loop 3, loop processing is performed while setting the initial value of counter m to 0 and the loop condition is set to m smaller than lg, and in loop 4, the initial value of counter n is set to 0 and the loop condition is set to n smaller than lg. Loop processing is performed.

  The mismatch information totaling unit 21d acquires the value of the deterioration flag at the coordinates (i + m, j + n) from the mismatch information table 70 (step S1505). The mismatch information totaling unit 21d determines whether or not the acquired deterioration flag value is true (step S1506). If the degradation flag value is true (Yes in step S1506), the mismatch information totaling unit 21d is a counter. 1 is added to C (step S1507). On the other hand, if the value of the deterioration flag is not true (No in step S1506), that is, if false, the process proceeds to step S1508.

  The mismatch information totaling unit 21d counts up the counter n of the loop 4 (step S1508), and repeats the above process while satisfying the loop 4 loop condition. On the other hand, when the loop condition of the loop 4 is no longer satisfied, the mismatch information counting unit 21d counts up the counter m of the loop 3 (step S1509), and repeats the above process while satisfying the loop condition of the loop 3. On the other hand, when the loop condition of loop 3 is no longer satisfied, the mismatch information counting unit 21d determines whether or not the seal deterioration determination counter C is smaller than the deterioration determination threshold Tr (step S1510). That is, as will be described later, it is determined whether or not the seal is deteriorated based on the value of the seal deterioration determination counter C.

  If the seal stamp deterioration determination counter C is smaller than the deterioration determination threshold Tr (Yes in step S1510), the mismatch information totaling unit 21d counts up the counter j of the loop 2 (step S1511), and while the loop 2 satisfies the loop condition Repeats the above process. In this count-up, the grid width lg is added to determine the next grid. The same applies to the count up of i below.

  On the other hand, when the loop condition of loop 2 is no longer satisfied, the mismatch information counting unit 21d counts up the counter i of loop 1 (step S1512), and repeats the above process while the loop condition of loop 1 is satisfied. On the other hand, when the loop condition of loop 1 is no longer satisfied, the mismatch information aggregating unit 21d sets false to the seal deterioration flag (step S1513) and ends the seal deterioration determination process. That is, based on the value of the stamp deterioration determination counter C, it is determined whether the seal is deteriorated.

  On the other hand, when the seal stamp deterioration determination counter C is not smaller than the deterioration determination threshold value Tr (No in step S1510), the mismatch information totaling unit 21d sets true to the seal stamp deterioration flag (step S1514), and ends the seal stamp deterioration determination process. .

  Next, a subroutine for the seal deterioration warning image generation process will be described with reference to FIG.

  The seal deterioration warning image generating unit 21e acquires all coordinate information and mismatch information from the mismatch information table 70 in order to generate a seal deterioration warning image for visually informing the operator of the seal deterioration (step S1701). ). The seal deterioration alerting image generation unit 21e plots (three-dimensional plot) the value of the mismatch information corresponding to each coordinate (X coordinate, Y coordinate) as the Z coordinate (step S1702). That is, the seal deterioration warning image generating unit 21e generates a seal deterioration warning image based on the accumulated value accumulated for each pixel. The seal deterioration warning image generating unit 21e stores the plotted image in the seal image management table 40 as a seal deterioration warning image (step S1703). The seal deterioration warning image generating unit 21e displays the stored seal deterioration warning image on the display device 5 based on the display request for the seal deterioration warning image.

  Next, an example of a hardware configuration for realizing the seal collation apparatus 21 that implements the seal deterioration determination program in the embodiment will be described with reference to FIG.

  The hardware configuration includes, for example, CPU 191, HDD (Hard Disk Drive) 192, RAM (Random Access Memory) 193, ROM (Read Only Memory) 194, input device 195, output device 196, communication interface (I / F) 197, A bus 198 is provided. The CPU 191, HDD 192, RAM 193, ROM 194, input device 195, output device 196, and communication interface (I / F) 197 are connected to each other via a bus 198, for example.

  The CPU 191 reads a program (for example, a seal stamp deterioration determination program) for performing various processes of the seal imprint matching device 21 stored in the HDD 192 or the like via the bus 198, and temporarily stores the read program in the RAM 193. Various processes are performed according to the program. The CPU 191 mainly functions as the above-described seal impression multi-value image acquisition unit 21a, seal image overlay processing unit 21b, seal impression collation image generation unit 21c, mismatch information totalization unit 21d, and seal deterioration deterioration alerting image generation unit 21e.

  The HDD 192 stores application programs for performing various processes of the seal collation apparatus 21 and data necessary for the processes of the seal collation apparatus 21. The HDD 192 mainly functions as the storage unit 21f.

  The RAM 193 is a volatile memory and temporarily stores a part of an OS (Operating System) program and application programs to be executed by the CPU 191. The RAM 193 stores various data necessary for processing by the CPU 191.

  The ROM 194 is a non-volatile memory and stores programs such as a boot program and BIOS (Basic Input / Output System).

  The input device 195 receives account information input via a keyboard or mouse (not shown).

  The output device 196 can be connected to the display device 5 and generates information to be displayed on the display device 5.

  A communication interface (I / F) 197 performs data transmission / reception with the outside (such as the image reading device 3 or the imprint database 4).

The bus 198 is a path that mediates transmission / reception of control signals, data signals, and the like between the devices.
According to the seal impression checking apparatus (seal stamp deterioration determination program) as described above, it is possible to determine what kind of problem is in which position of the seal stamp because the missing seal or the like is detected by paying attention to the pixel. Thereby, it is possible to prompt the operator to re-register the registered seal. It is also possible to detect not only the deterioration of the seal, but also the forgery (scratch, clogging, etc.) of the fine seal.

  In the above-described embodiment, the main process of the seal collation apparatus 21 has been described as being executed by software processing by the CPU. However, all or part of this process may be realized by hardware.

  Further, the above-described embodiment is not limited to the above-described embodiment, and various changes can be made without departing from the gist of the embodiment.

DESCRIPTION OF SYMBOLS 1 Seal collation system 2 Imprint control apparatus 3 Image reading apparatus 4 Imprint database 5 Display apparatus 20 Imprint search apparatus 21 Imprint collation apparatus 21a Imprint multi-value image acquisition part 21b Imprint image superposition process part 21c Imprint collation image generation part 21d Inconsistency information totalization Unit 21e seal deterioration warning image generation unit 21f storage unit 40 imprint image management table 50 collation result information table 60 collation result pixel management table 70 mismatch information table 80 operation management table 1200, 1201, 1202, 1203 pixel 1600, 1601, 1602 grid 1800, 1801, 1802 Deterioration location confirmation icon 1803 OK icon 191 CPU
192 HDD
193 RAM
194 ROM
195 Input device 196 Output device 197 Communication interface 198 Bus

Claims (7)

A seal stamp deterioration determination program for determining deterioration of a seal stamp by comparing a registered seal image and a read seal image,
Comparing the pixel of the registered imprint image with the pixel of the read imprint image corresponding to the pixel, and setting a predetermined value for each pixel as a value of the pixel according to a comparison result;
The value of the set pixel is added for each pixel to the accumulated value obtained by accumulating the value of the pixel for each pixel, the added accumulated value is compared with a predetermined threshold value for each pixel, and deterioration is performed based on the comparison result. Setting a deterioration flag indicating the presence or absence of
Determining whether the seal has deteriorated based on the set deterioration flag,
A seal deterioration determination program that is executed by a computer.   2. The registered seal image is divided into a grid including a plurality of pixels, and it is determined whether or not the seal is deteriorated based on the number of the deterioration flags indicating the presence of deterioration in the grid. The seal deterioration determination program described in 1.   3. The seal deterioration determination program according to claim 1, wherein when the set pixel value is a value indicating pixel mismatch, the set pixel value is added to the accumulated value. 4.   When the value of the set pixel is added to the accumulated value, and the number of surrounding pixels having the same value as the set pixel value is equal to or larger than a predetermined addition threshold, the set pixel is set to the accumulated value. The seal stamp deterioration determination program according to any one of claims 1 to 3, characterized in that the value is added.   The method according to claim 1, further comprising the step of: when it is determined that the seal is deteriorated, generating a seal deterioration warning image based on the accumulated value accumulated for each pixel and displaying the image on a display device. The seal stamp deterioration determination program according to any one of 1 to 4. An imprint verification device that determines deterioration of a seal by comparing a registered imprint image and a read imprint image,
A comparison setting unit that compares the pixel of the registered imprint image with the pixel of the read imprint image corresponding to the pixel, and sets a predetermined value for each pixel as a value of the pixel according to a comparison result;
The value of the set pixel is added for each pixel to the accumulated value obtained by accumulating the value of the pixel for each pixel, the added accumulated value is compared with a predetermined threshold value for each pixel, and deterioration is performed based on the comparison result. A setting unit for setting a deterioration flag indicating the presence or absence of
A determination unit for determining whether or not the seal is deteriorated based on the set deterioration flag,
An imprint verification device comprising: A seal deterioration determination method for determining deterioration of a seal by comparing a registered seal image and a read seal image,
Comparing the pixel of the registered imprint image with the pixel of the read imprint image corresponding to the pixel, and setting a predetermined value for each pixel as a value of the pixel according to a comparison result;
The value of the set pixel is added for each pixel to the accumulated value obtained by accumulating the value of the pixel for each pixel, the added accumulated value is compared with a predetermined threshold value for each pixel, and deterioration is performed based on the comparison result. Setting a deterioration flag indicating the presence or absence of
Determining whether the seal has deteriorated based on the set deterioration flag,
A seal deterioration determination method characterized by comprising: