JP4729363B2 - Photo side detection device, ID card creation device, photo side detection method, and ID card creation method - Google Patents

Description

  The present invention relates to a photo side detection device that detects a photo side from a sheet on which a photo is pasted, an ID card creation device having the photo side detection device, a photo side detection method, and an ID card creation method.

  Conventionally, ID cards such as employee cards, driver's licenses, and various membership card cards have printed face photographs in addition to printed information such as the cardholder's identification number, name, and expiration date. The creation of the ID card on which the face photo is printed is performed based on the read face image pasted at a predetermined position on the ID card application form of the issuer at the time of creation of the ID card. There is something.

  When creating an ID card by reading the face photo on the ID card application form, make sure the position of the face photo pasted on the application form to prevent the face photo printed on the ID card from shifting or tilting. It needs to be detected.

Patent Document 1 discloses a technique for detecting an electromagnetic wave transmitted through an application form as a technique for reliably detecting the position where a facial photograph is pasted on the application form. Patent Document 2 discloses a technique for detecting an edge of a face photograph pasted on an application form from a captured image and extracting a face photograph image not including the edge as an ID card image. .
JP 2004-174889 A JP 2001-180160 A

  However, when detecting electromagnetic waves that pass through the application form, the accuracy of detecting the position of the photo may be affected by the thickness of the application form or the photo to be applied, so apply for more accurate detection. It was necessary to limit the thickness and material of paper and photos.

  In addition, when detecting the edge of a photograph from the captured image, when the source of uniform illumination light that does not diffusely reflect in order to obtain a good facial photograph, and when the background color and density of the photograph are similar to the application form Edge detection proved difficult.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a technique for accurately acquiring the position of a photograph attached to a sheet without shifting.

In order to solve the above-mentioned problem, the photo edge detecting device according to claim 1 irradiates infrared rays toward a square-shaped photo stuck on paper, and along at least one side of the photo. Infrared irradiation means for projecting a shadow corresponding to the side onto the paper, infrared imaging means for capturing the shadow, and at least one side of the photograph based on an image captured by the infrared imaging means And detecting means for detecting.

According to a second aspect of the present invention, in the first aspect of the invention, the infrared imaging unit images a photographic direction from a side of a shadow projected by the infrared irradiation unit.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the infrared irradiating means irradiates infrared rays toward a square-shaped photograph affixed on a sheet, and the photographs are adjacent to each other. Projecting shadows corresponding to the two sides along the two sides onto the sheet, and the detecting unit detects two adjacent sides of the photograph based on an image captured by the infrared imaging unit. It is characterized by.
Further, the invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the infrared irradiation means is configured to emit infrared rays from different directions toward a square-shaped photograph stuck on a sheet. , And projecting shadows corresponding to the sides along the plurality of adjacent sides of the photograph onto the sheet, and the detection unit applies the image captured by the infrared imaging unit. A plurality of sides of the photograph are detected based on the basis.

The invention according to claim 5 is the invention according to claim 4 , wherein the infrared irradiation means corresponds to the side along three sides of two long sides and a short side sandwiched between the long sides. A side shadow is projected onto the paper.

The invention according to claim 6 is the invention according to any one of claims 1 to 5 , further comprising storage means for storing a brightness threshold value for each pixel of the infrared imaging means, wherein the detection means is Further, it is characterized in that a shadow is determined for each pixel based on the stored threshold value, and a side of the photograph is detected.

The invention according to claim 7 is the invention according to any one of claims 1 to 5 , wherein for each pixel of the infrared imaging means, a conversion means for performing a range conversion of a signal value in the pixel, and the detection means Is characterized in that a shadow is determined for each pixel based on a predetermined threshold value and the converted signal value, and a side of the photograph is detected.

ID card-making apparatus of the invention described in claim 8, and a photograph edge detecting device according to any one of 請 Motomeko 1-7, and reading means for reading an area containing the photograph affixed onto the paper, Card generation means for extracting a photographic image from the read image based on information on a side of the photograph detected by the detection means and generating an ID card including the extracted photographic image; It is characterized by.

According to a ninth aspect of the present invention , there is provided a photo edge detection method that irradiates infrared rays toward a square-shaped photograph affixed on a sheet, and adds a shadow corresponding to the edge along at least one edge of the photograph. An infrared irradiation process for projecting onto the paper; an infrared imaging process for imaging the shadow; and a detection process for detecting at least one side of the photograph based on an image captured by the infrared imaging process. It is characterized by that.

The invention described in claim 10 is characterized in that, in the invention described in claim 9 , in the infrared imaging step, a photographic direction is imaged from a shadow side projected by the infrared irradiation step.

The invention according to claim 11 is the invention according to claim 9 or 10 , wherein, in the infrared irradiation step, infrared rays are irradiated toward a square-shaped photograph affixed on a sheet, and the photographs are adjacent to each other. Projecting shadows corresponding to the sides along the two sides onto the sheet, and detecting two adjacent sides of the photograph based on the image captured by the infrared imaging step in the detection step. It is characterized by.
The invention according to claim 12 is the invention according to any one of claims 9 to 11, wherein in the infrared irradiation step, infrared rays are emitted from different directions toward a square-shaped photograph affixed on paper. , And projecting shadows corresponding to the sides along the two adjacent sides of the photograph on the paper, and in the detection step, the image captured by the infrared imaging step A plurality of sides of the photograph are detected based on the basis.

The invention according to claim 13 corresponds to the side in the invention according to claim 12 , wherein the infrared irradiation step corresponds to the side along three sides of two long sides and a short side sandwiched between the long sides. A side shadow is projected onto the paper.

According to a fourteenth aspect of the present invention, in the invention according to any one of the ninth to thirteenth aspects, in the detection step, for each pixel based on a threshold value of brightness for each pixel of the infrared imaging means stored in advance. In this case, the side of the photograph is detected and the side of the photograph is detected.

The invention according to claim 15 further includes a conversion step of performing a range conversion of a signal value in the pixel for each pixel of the infrared imaging means in the invention according to any one of claims 9 to 13 , In the detecting step, a shadow is determined for each pixel based on a predetermined threshold value and the converted signal value, and a side of the photograph is detected.

ID card-making method of the invention according to claim 16, the photo side detection method according to any one of 請 Motomeko 9-15, a reading step reading a region including a photograph affixed onto the paper, A card generation step of extracting a photographic image from the read image and generating an ID card including the extracted photographic image based on information on a side of the photograph detected by the detection step. Features.

According to the first and ninth aspects of the present invention, at least one side of a photograph can be detected, and the position of the photograph is accurately detected without being affected by the color or material of the paper or the photograph. be able to.

According to the second and tenth aspects of the present invention, it is possible to capture a wider and high-contrast shadow, and to detect the photographic position more accurately.

According to the third and eleventh aspects of the present invention, two adjacent sides of a photograph can be detected.
According to the inventions described in claims 4 and 12 , it is possible to detect a photo position with higher accuracy by detecting a plurality of shadows.

According to the inventions of claims 5 and 13 , the position of the short side where the error rate is larger than that of the long side can be accurately measured, and the photo position can be detected with higher accuracy. .

According to the inventions described in claims 6, 7, 14, and 15 , it is possible to suppress the influence due to the difference in local brightness when determining the shadow from the image by the irradiated infrared rays, and it is possible to more accurately. High photo position can be detected.

According to the inventions described in claims 8 and 16 , an ID card including a photographic image can be more accurately created from a photographic image pasted on a sheet.

  Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5, but the present invention is not limited to these embodiments. Further, the embodiment of the present invention shows the most preferable embodiment of the invention, and the terms and uses of the invention are not limited to this.

  FIG. 1 is a block diagram showing the configuration of an ID card creation device 1 according to the present invention, FIG. 2 is a diagram illustrating the application of a face photo 4 on an application form 3, and FIG. FIG. 3B is a diagram illustrating the imaging of a shadow at the imaging position of the photographic imaging unit 50, and FIG. 3B is a position of the infrared illumination lamp and the infrared camera when the face photograph 4 at the imaging position is viewed from the direction of the CCD camera 51. FIG. 4 is a flowchart illustrating a process of extracting data relating to a face image from a face photograph affixed to an application form, and FIG. 5 is an edge of the face photograph from a shadow caused by infrared illumination. It is a figure which illustrates detection.

  As shown in FIG. 1, the ID card making apparatus 1 has an automatic supply unit 30 at the top, a number reading unit 40 at the bottom, a face photo imaging unit 50 at the bottom, and an information reading unit 60 at the bottom. The control unit 21 that is arranged and controls each part of the ID card creation device 1 reads the certification number and various information described in the form, and also reads the face photo affixed to the form to read the ID card. In this configuration, information for creation is captured.

  The control unit 21 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like (not shown). In the CPU, a predetermined area of the RAM is used as a work area, and a ROM, a nonvolatile memory, By reading and sequentially executing various programs stored in the storage unit 23 that is an optical / magnetic storage medium, the operation of the ID card creating apparatus 1 is comprehensively controlled. In addition to the various programs, the storage unit 23 may be configured to store setting data regarding the operation of the ID card creation device 1.

  In response to an instruction from the control unit 21, the ID card printer 22 prints various information based on the above-described information on the recording surface of an ID card such as paper or plastic, or a face photograph affixed to an application form. For example, a printer that prints a face image based thereon. The ID card printer 22 may be configured to store the above-described various information and data relating to the face image in an IC tag provided on the ID card or a magnetic / optically readable / writable storage medium.

  The automatic supply unit 30 includes an application form supply unit 31 that stores application forms that are card-like forms and sequentially supplies the application forms, and a mount supply part 32 that supplies a base form that is a strip-like form. It has been. An application paper tray 33 is set in the application paper supply unit 31, and a mount tray 34 is set in the mount supply unit 32. A common transport unit 70 that transports the application paper from the application paper tray 33 and the mount from the mount tray 34, and a number reading unit 40 that reads a certification number and the like along a transport path 71 of the transport unit 70; A face photograph imaging unit 50 for reading a face photograph is arranged.

  The application form stored in the application form supply unit 31 has a description of information about itself such as name, address, date of birth, etc., and a photo of the applicant's face in order to issue an ID card. It is. Specifically, as shown in FIG. 2, the application form 3 includes an information entry area 301 for describing its own information, a photo pasting area 302 for pasting a facial photograph 4, and a certification number for the application form. It has a number description area 303. The mount is, for example, a shooting mount when the ID card to be created is a license or the like.

  The number reading unit 40 is provided with an OCR reader 41. The OCR reader 41 reads a certification number or the like from the sheet number description area 303 of the application sheet 3, and the read information is decoded by the decoding unit 42 and sent to the CPU 54. The data is sent from the CPU 54 to the control unit 21.

  The face photograph imaging unit 50 is provided with a CCD camera 51 (Charge-Coupled Device), images the application sheet 3 conveyed to an imaging position where a photo pasting area 302 is arranged substantially in front of the CCD camera 51, and The face photograph 4 affixed to the application sheet 3 is read, an analog color signal is sent to the image processing unit 52, and data relating to the face image image-processed by the image processing unit 52 is sent to the control unit 21. The CCD camera 51 is provided with an illumination lamp 53 that illuminates the facial photograph 4 when the facial photograph 4 is captured, and the CCD camera 51 is controlled by the CPU 54. The face photograph imaging unit 50 includes a mount discharge unit 55 that branches and discharges the mount before the scanner unit 61 of the information reading unit 60, and switches the transport path 71 by operating the switching valve 56 to remove the mount from the scanner unit. Branches before 61 and discharges to the mount bucket 57.

  The face photograph imaging unit 50 includes an infrared illumination lamp 58, an infrared camera 59, and an edge detection unit 54a controlled by the CPU 54, and irradiates infrared rays from the infrared illumination lamp 58 to the face photograph 4 at the imaging position. An image including a shadow generated at the edge of the face photograph 4 due to the thickness is captured by the infrared camera 59. Then, the edge detection unit 54 a discriminates the shadow from the image by binarization by comparison with a predetermined threshold value, detects the edge, and outputs the detection result to the CPU 54. As described above, in the configuration in which the edge is detected by the side effect of the infrared illumination, it is not affected by the design or color of the application form 3 or the face photograph 4, and thus is affected by the color or material of the application form or the photograph. Edge detection can be performed without any problem.

  As shown in FIG. 3A, the CCD camera 51, the infrared illumination lamp 58, and the infrared camera 59 are arranged substantially in front of the facial photograph 4 with respect to the facial photograph 4 attached to the application sheet 3 at the imaging position. The infrared illuminating lamp 58 and the infrared camera 59 are arranged in an upward direction from the oblique upper side of the face photograph 4 to the face photograph 4 direction. In this way, since the infrared irradiation from the infrared illumination lamp 58 is performed obliquely from the upper side of the face photograph 4, the shadow K having a sufficient width can be shown, so that the edge detection by the shadow K can be easily detected. Can be.

  In addition, the infrared camera 59 may be configured to capture the face photograph 4 from substantially the same direction as the CCD camera 51. However, as shown in the figure, the infrared illumination lamp 58 and the infrared camera 59 are arranged with the face photograph 4 in between. A configuration in which the face photo 4 is arranged in the opposite direction, that is, the side on which the shadow appears is preferable. In this case, since a high-contrast shadow K having a sufficient width can be imaged, the accuracy of edge determination by binarization or the like can be increased.

  Moreover, the infrared illumination lamp 58 is a structure arrange | positioned in the position where two shadows appear with respect to the face photograph 4, as shown in FIG.3 (b). That is, the shadows K2 and K3 appear on the edge of the face photograph 4 when irradiated with infrared rays from the infrared illumination lamp 58a, and the shadows K1 and K2 appear when exposed to infrared light from the infrared illumination lamp 58b. Note that the infrared illumination lamps 58a and 58b may be configured to sequentially switch the face photograph 4 to emit infrared rays in accordance with a control instruction from the control unit 21. In this case, the infrared camera 59 can capture those shadows, and can detect edges from more shadows.

  Note that the number of infrared illumination lamps may be three or four, and is not particularly limited. For example, when the infrared camera 59 is provided with three infrared illumination lamps at the position shown in the figure, the side facing the infrared camera 59 and the face photograph 4 and the side in contact with the side are inclined substantially vertically from above. The shadows K1 to K3 can be efficiently expressed when the infrared irradiation lamp is provided at the irradiation position. In addition, when there are four, it is preferable that an infrared illumination lamp is provided at a position that irradiates obliquely from above and substantially perpendicular to each side of the face photograph 4 and an infrared camera 59 is provided substantially in front of the face photograph 4. .

  In addition, as shown in the figure, when the face photograph 4 has a rectangular shape with a long side and a short side, two long sides and a side shadow K1 to K3 are projected on the short side sandwiched between the long sides. Now, it is possible to measure the position and length of the short side with high accuracy, and to detect the photo position with higher accuracy by increasing the measurement accuracy of the short side, which has a larger error rate than the long side. Can do.

  Here, a process performed by the control unit 21 to capture the face photograph 4 attached to the application form 3 with the face photograph imaging unit 50 and extract data related to the face image will be described in detail.

  As shown in FIG. 4, first, the application form 3 is conveyed to the above-described imaging position (step S11), and an area including at least the photo pasting area 302 is imaged by the CCD camera 51 as an ID card image (step S11). S12), an infrared image is captured as an edge detection image of the face photograph 4 by the infrared illumination lamp 58 and the infrared camera 59 described above (step S13).

  Next, as an edge detection process, the captured infrared image is binarized with a threshold value relating to a predetermined brightness to determine the shadow, and corresponds to the coordinates of the inner edge of the shadow, that is, the edge of the photograph. A plurality of coordinates of the part are acquired, and processing for obtaining a side (straight line) equivalent to the edge of the photograph is performed by a known method such as the Hough method based on the acquired coordinates (step S14). Specifically, as shown in FIG. 5, when two infrared images are captured by sequentially irradiating infrared rays from two directions, a shadow is determined from the two infrared images to obtain coordinates. 3 sides equivalent to the edges of the photograph can be obtained. In addition, with one infrared illumination, two adjacent sides can be acquired.

  In addition, the threshold value regarding the brightness at the time of discrimination of the shadow in the edge detection process may be set for each pixel in the infrared camera 59 and stored in the storage unit 23. In this case, it is possible to suppress the influence due to the local brightness difference (see FIG. 5) when determining the shadow from the image by the infrared illumination light. The edge determination in the edge detection processing may be configured to convert the range of signal values output for each pixel in the infrared camera 59 and to perform based on a threshold value related to one brightness. In this case as well, it is possible to suppress the influence due to the difference in local brightness when determining the shadow.

  In the edge detection process, the side (straight line) equivalent to the edge of the photograph and the data (coordinates of the inner edge of the shadow) obtained from the process such as the Hough method are tested, and the authenticity of the data with respect to the straight line is verified. If the image is low, that is, if there is noise due to foreign matter adhering to the surface or edge of the photo or application form, or if the photo is not cut straight, the data credibility for the subsequent processing It may be configured to output a warning that the performance is low. In this case, based on the output warning, the ID card printer 22 interrupts the creation of the ID card, and a warning is displayed on a display unit such as an LCD (Liquid Crystal Display) (not shown) to perform manual correction. Processing such as prompting can be performed at a later stage to prevent creation of an unauthorized ID card and reduce loss.

  Further, in the edge detection process, the size of the face photograph or the shift of the face photograph 4 in the photograph pasting area 302 is detected from the obtained edge of the photograph, and compared with a prescribed value stored in the storage unit 23 in advance. If the value exceeds the value, a warning may be output for the subsequent processing. In this configuration, if the size of the face photo is not within the specified range, or if it is difficult to correct by enlargement, reduction, rotation, etc. due to data loss or image quality degradation caused by misalignment of the face photo, an illegal ID card Can be prevented in advance based on the warning that is generated to reduce the loss.

  Next, trimming of the ID card image based on the detected edge of the photo, that is, information on the face image inside the edge of the photo is extracted from the face photo 4 pasted in the photo pasting area 302 (step S15). Then, the application form 3 is discharged to the subsequent stage (step S16), and the process ends.

  The information reading unit 60 includes a scanner unit 61 that reads information from the information entry area 301 of the application form 3 after reading the certification number and the face photograph. The scanner unit 61 is controlled by the CPU 62, and the reading information is controlled by the CPU 62. Sent to the unit 21. The application form that has been read by the scanner unit 61 is discharged to the application form bucket 63. The control unit 21 reads the certification number and reads the face photograph to acquire information for creating an ID card and outputs the information to the ID card printer 22 to create an ID card.

  The conveyance unit 70 forms a conveyance path 71 by conveyance rollers 7201 to 7213, and these conveyance rollers 7201 to 7213 can be driven by power transmission means 74 using a stepping motor 73 as a power source. The stepping motor 73 is configured to adjust the amount of movement of the power transmission means 74 in accordance with a control instruction from the CPU 54, and can accurately control the transport position of the application sheet 3. The power transmission means 74 is constituted by a belt, for example.

  As described above, when the ID card creation device 1 reads the face photograph 4 affixed to the application form 3, the ID card creation apparatus 1 applies the infrared rays from the infrared illumination lamp 58 to the corresponding side along the adjacent sides of the face photograph 4. The corresponding shadow is projected, the shadow is captured by the infrared camera 59, the captured shadow is discriminated, and the edge of the face photograph 4 is detected. For this reason, it is possible to accurately detect the position of the photograph without being affected by the color or material of the sheet or photograph.

  Further, a photographic image is extracted from an image including the face photograph 4 read by the CCD camera 51 based on the edge of the face photograph 4 detected in the above configuration, and the ID card including the extracted photograph image is used as the ID card printer 22. Therefore, it is possible to accurately create an ID card including a photographic image from a photographic image affixed on a sheet without being affected by the application form or the color or material of the photograph.

  Note that the description in the present embodiment shows an example of the present invention, and the present invention is not limited to this. The detailed configuration and detailed operation of the ID card creation device 1 according to the present invention can be changed as appropriate without departing from the spirit of the present invention. For example, the infrared camera 59 only needs to be arranged so as to be able to capture the shadows, and may be configured to capture the face photo 4 direction from the position of the CCD camera 51. The CCD camera 51 may be a digital camera using a complementary metal-oxide semiconductor (CMOS).

It is a block diagram which shows the structure of the ID card production apparatus 1 which is this invention. It is a figure which illustrates sticking of the facial photograph 4 in the application paper 3. FIG. (A) is a figure which illustrates the positional relationship of an infrared illumination lamp and an infrared camera when the face photograph 4 in the imaging position is viewed from the CCD camera 51 direction. (B) is a diagram illustrating the face photograph 4 in the imaging position. It is a figure which illustrates the positional relationship of an infrared illumination light and an infrared camera when it sees from 51 directions. It is a flowchart which shows the process which extracts the data regarding a face image from the face photograph affixed on the application form. It is a figure which illustrates the edge detection of the face photograph from the shadow by infrared illumination.

Explanation of symbols

1 ID card creation device (photo edge detection device)
3 Application form 4 Photo 21 Control unit (detection means, range conversion means, ID card creation means)
22 ID card printer (ID card creation means)
23 storage unit (storage means)
DESCRIPTION OF SYMBOLS 30 Automatic supply part 31 Application paper supply part 32 Mount paper supply part 33 Application paper tray 34 Mount tray 40 Number reading part 41 OCR reader 42 Decoding part 50 Face imaging part 51 CCD camera (reading means)
52 Image processor 53 Illumination lamp 54 CPU (detection means)
54a Edge detection unit (detection means)
55 Mount discharge section 56 Switching valve 57 Mount bucket 58, 58a, 58b Infrared illumination lamp (infrared irradiation means)
59 Infrared camera (imaging means)
60 Information Reading Unit 61 Scanner Unit 62 CPU
63 Application Form Bucket 70 Conveying Unit 71 Conveying Path 7201-7213 Conveying Roller 73 Stepping Motor 74 Power Transmission Means 301 Information Entering Area 302 Photo Pasting Area 303 Paper Number Writing Area K, K1 to K3 Side Shadow

Claims (16)

Infrared irradiation means for irradiating infrared rays toward a square-shaped photograph affixed on paper, and projecting a shadow corresponding to the side along at least one side of the photo;
Infrared imaging means for imaging the side shadow;
Detecting means for detecting at least one side of the photograph based on an image captured by the infrared imaging means;
A photographic side detection apparatus comprising: The photographic edge detection apparatus according to claim 1, wherein the infrared imaging unit images a photographic direction from a side of a shadow projected by the infrared irradiation unit.   The infrared irradiating means irradiates infrared rays toward a rectangular photograph stuck on a sheet, and projects a shadow corresponding to the side along two adjacent sides of the photograph onto the sheet. ,
  The photo side detection apparatus according to claim 1, wherein the detection unit detects two adjacent sides of the photo based on an image captured by the infrared imaging unit. The infrared irradiating means switches and irradiates infrared rays from different directions toward a rectangular photograph attached on a sheet, and a shadow corresponding to the side along a plurality of adjacent sides of the photo. Projected onto the paper,
Said detecting means, photo edges detection device according to any one of claims 1-3, characterized by detecting a plurality of edges of said photo based on the image captured by the infrared imaging device. The infrared irradiation means, a Henkage corresponding to the edges along two of the three sides of the short sides sandwiched long sides and the long sides to claim 4, characterized in that projecting on the sheet The photographic side detection apparatus as described. Storage means for storing a threshold of brightness for each pixel of the infrared imaging means;
The detection unit performs a determination of Henkage for each pixel on the basis of the stored thresholds, photographs sides according to any one of claims 1 to 5, characterized in that detecting the photograph edge Detection device. Conversion means for performing range conversion of the signal value in each pixel of the infrared imaging means;
The detection unit performs a determination of Henkage for each pixel based on a predetermined threshold and the converted signal value, any claim 1-5, characterized by detecting said photographic sides The photo edge detection device according to claim 1. Photo and side detecting apparatus according to any one of 請 Motomeko 1-7,
Reading means for reading an area including a photograph affixed on paper;
Card generation means for extracting a photographic image from the read image based on information on a side of the photograph detected by the detection means, and generating an ID card including the extracted photographic image;
An ID card creating device comprising: Irradiating infrared rays toward a square-shaped photo affixed on paper, and projecting a shadow corresponding to the side along at least one side of the photo onto the paper;
An infrared imaging step of imaging the side shadow;
A detection step of detecting at least one side of the photograph based on the image imaged by the infrared imaging step ;
A photographic edge detection method comprising: The photographic edge detection method according to claim 9 , wherein, in the infrared imaging step, a photographic direction is imaged from a side of a shadow projected by the infrared irradiation step.   In the infrared irradiation step, infrared rays are irradiated toward a rectangular photograph pasted on a sheet, and a shadow corresponding to the side is projected onto the sheet along two adjacent sides of the photograph. ,
  11. The photo side detection method according to claim 9, wherein, in the detection step, two adjacent sides of the photo are detected based on the image taken in the infrared imaging step. In the infrared irradiation step, infrared rays are switched and irradiated from different directions toward a square photograph attached on a sheet, and a side shadow corresponding to the side along a plurality of adjacent sides of the photo. Projected onto the paper,
The photo side detection method according to any one of claims 9 to 11, wherein, in the detection step, a plurality of sides of the photograph are detected based on the image picked up by the infrared imaging step. In the infrared irradiation step, the Henkage corresponding to the edges along two of the three sides of the short sides sandwiched long sides and the long sides in claim 12, characterized in that projecting on the sheet The described photo side detection method. Wherein in the detection step, the claim, characterized in that in advance based on the brightness of the threshold in each pixel of the stored infrared imaging device performs a determination of Henkage for each pixel, detects the photograph sides 9-13 The photo edge detection method according to any one of the above. A conversion step of performing a range conversion of the signal value in each pixel of the infrared imaging means ;
14. The detection step according to any one of claims 9 to 13 , wherein an edge is determined for each pixel based on a predetermined threshold value and the converted signal value to detect an edge of the photograph. The photo edge detection method according to claim 1. Photo and side detection method according to any one of 請 Motomeko 9-15,
A reading process for reading an area including a photograph pasted on paper;
Based on the information on the sides of the photo detected by the detection step, a photo image is extracted from the read image, and an ID card including the extracted photo image is generated, and a card generation step,
An ID card making method characterized by comprising:

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