JP4597178B2 - Imaging device and personal confirmation system - Google Patents

Description

  The present invention relates to a non-contact type photographing apparatus.

  2. Description of the Related Art Conventionally, there has been proposed an individual confirmation technique for identifying an individual based on human physical characteristics and confirming whether or not the person is the person. By collating the physical characteristics acquired by the imaging device with the physical characteristics registered in advance, it is possible to identify an individual and determine whether the person is the person.

  Imaging devices are broadly classified into contact types in which the device and the body are in contact and non-contact types in which the device and the body are not in contact. In places used by an unspecified number of people, a non-contact type is desired from the viewpoint of resistance to dirt, hygiene, and psychological resistance.

  For example, when used for entrance / exit management of a facility, it is necessary to take a picture whenever a person enters or exits the facility. In this case, the contact-type device is frequently touched by a person. Therefore, there is a possibility that the glass surface to which a hand or the like is applied may become dirty, and in this case, photographing cannot be performed well. In addition, contact with a dirty surface may lead to hygiene problems and psychological resistance. For these reasons, a non-contact type device is desired.

  Even when used in a place where hygiene is severe, such as a medical institution or a research institution, a non-contact type device is desired rather than a contact type device. In addition, as the various antibacterial goods and hygiene goods have become hit products in recent years, there is an increasing need for non-contact products in the world.

  In photographing physical features, a lighting device is often used to obtain a desired image without the influence of external light. However, if the subject moves away from the apparatus, the subject cannot be illuminated uniformly and the image quality deteriorates. Therefore, it has been difficult to realize a non-contact type device.

  In order to solve this problem, Japanese Patent Application Laid-Open No. 2004-228561 discloses a technique for adjusting the light amount of a light source based on a captured image. However, since it is necessary to always turn on the light source for imaging, there is a problem in that power consumption is increased and processing time is increased due to multiple imaging.

In view of such problems, it is an object of the present invention to provide a non-contact photographing apparatus that can acquire an image with a good image quality.
JP 2002-92616 A

An imaging apparatus according to an aspect of the present invention is a blood vessel pattern imaging apparatus having illumination, and includes a light receiving unit that receives reflected light of infrared light applied to an imaging target that is an imaging target; having a plurality of infrared light sources disposed so as to be positioned on each of the corners and the sides of the rectangle around the unit, an irradiation means for irradiating the infrared light for the shooting target, wherein By controlling the current supplied to each infrared light source so as to increase as the distance from the light receiving means increases, the intensity of the infrared light emitted from each infrared light source depends on the arrangement position. The control means for controlling the light intensity, the light emission time, and the wavelength, and the reflectance received by the light receiving means are uniform. wherein each infrared light to such an object There based on the reflected light of the irradiated infrared light individually, anda light intensity information acquisition means for acquiring intensity information indicating the strength of the infrared light which the shooting target is received from each of the infrared light source said control means, for the infrared light source distance is the same from said light receiving means is the intensity of the infrared light, each said infrared light source emits light is acquired by the intensity information acquisition means to be the same The current value adjusted by the light intensity information is stored in a memory, and the intensity of infrared light is adjusted based on the current value stored in the memory.

  Alternatively, the illumination is controlled based on the length of the exposure time.

  Alternatively, the illumination is controlled based on the exposure timing.

  Alternatively, when the object is a human body, the light emission amount, the light emission time, and the light emission wavelength of the irradiation means are adjusted so that the human body is not affected.

  Alternatively, when the object is a hand, the position of the irradiation means is set according to the size of the hand.

  Alternatively, when the object is a blood vessel pattern of the human body, the wavelength of the illumination means is adjusted to the imaging of the blood vessel pattern of the human body.

  Alternatively, a partition member that optically partitions the space in which each light source is provided and the space in which the light receiving unit is provided is provided.

  Alternatively, it has a box-shaped casing having a front surface that is a surface facing the object when the image is taken, and the front surface transmits light that transmits infrared light and has a shorter wavelength than infrared light. A filter plate for blocking is attached, and each of the light sources is provided at a position close to a rear surface that is an inner surface of the casing and opposite to the front surface, and the inner surface of the casing prevents light reflection. Has been processed.

  An individual confirmation system according to the present invention is an individual confirmation system for confirming an individual. The personal image acquired by performing photographing in advance for each photographing apparatus and the individual, Storing in association with an ID for identifying, an input unit for inputting the ID, an image stored in the storage unit corresponding to the input ID, and performing the confirmation And determining means for determining whether or not the individual who has input the ID is the person himself / herself by collating the image acquired by performing the shooting of the individual who has input the ID with the imaging device. It is provided.

  In the case of an individual confirmation system for confirming an individual in a plurality of facilities, the system is configured as follows. That is, for each facility, an input unit for inputting an ID for identifying an individual and the above-described photographing device are provided, and photographing is performed in advance for each individual on a server to which the respective photographing devices are connected. And storing the personal image acquired in this way in association with the ID of the individual, and storing in the storage unit corresponding to the ID input by the input unit. Whether or not the individual who entered the ID is the person himself / herself is checked by comparing the image with the image acquired by performing the photographing of the individual who entered the ID when performing the confirmation by the photographing apparatus. Discriminating means for discriminating is provided.

  In addition, using the personal confirmation system that performs personal confirmation (recognition) as described above, the authorized person in a specific room is confirmed, the transaction is confirmed at the financial terminal, the employee's attendance is confirmed, or the PC is logged in Check the permitter.

  The present invention will be described in more detail with reference to the accompanying drawings.

[First embodiment]
FIG. 1 is a perspective view showing an example of the configuration of the photographing apparatus 1, FIG. 2 is a side sectional view near the center of the photographing apparatus 1, FIG. 3 is a diagram showing an example of the security system 100, and FIG. FIG. 5 is a block diagram illustrating an example of a functional configuration of the photographing apparatus 1 according to the first embodiment, FIG. 6 is a diagram illustrating an example of a distribution of light intensity irradiated to a subject, and FIG. FIG. 8 is a diagram showing an example of a blood vessel pattern image FA1 that has been subjected to image processing, and FIG.

  An imaging apparatus 1 according to the present invention includes an imaging apparatus main body 2 and a main body cover 3 as shown in FIGS. When photographing, the main body cover 3 is attached to the front surface 20a of the photographing apparatus main body 2 in advance. Then, as shown in FIG. 4, the object is directed to the front of the photographing apparatus 1 and the shutter is cut.

  The imaging apparatus body 2 includes a casing (housing) 20, an imaging unit 21, a circuit board 22, an irradiation unit 23, an external connection interface 24, a shutter button 25, and the like. Further, it is possible to connect to the personal computer 6 through the external connection interface 24 as shown in FIG.

  The photographing unit 21 includes a lens 211, an image sensor 212, and the like. As the image sensor 212, for example, a CMOS type image sensor is used.

  The circuit board 22 is provided with a control circuit for performing control and D / A conversion of each part of the photographing apparatus 1 described later, a ROM storing a computer program (firmware), a CPU, and the like. The CPU performs arithmetic processing based on data obtained by a command from the personal computer 6 or the shutter button 25, a computer program, or photographing. With such a configuration, the photographing apparatus 1 realizes functions such as the power control unit 201, the image processing unit 202, and the illumination device driving units 261 and 262 as illustrated in FIG.

  The irradiation unit 23 includes a plurality of illumination devices (illumination devices 51a to 51d, illumination devices 52a to 52d) as light sources.

  These lighting devices are provided so as to satisfy the requirements listed below. That is, (1) The distance between each of the lighting devices 51a to 51d and the lens 211 is the same. (2) The distance between each of the lighting devices 52a to 52d and the lens 211 is the same.

  As shown in FIG. 5, the lighting device driving units 261 and 262 drive these lighting devices by supplying current to the lighting devices 51 a to 51 d and 52 a to 52 d in accordance with commands from the power supply control unit 201, respectively. .

  The power supply control unit 201 controls the lighting device driving units 261 and 262 so that the current supplied to the lighting devices 51a to 51d is larger than the current supplied to the lighting devices 52a to 52d. Accordingly, the lighting devices 51a to 51d emit light that is stronger than the lighting devices 52a to 52d. Note that the current supplied to these lighting devices is obtained from the personal computer 6 via the external connection interface 24.

  As described above, by providing a difference in the intensity of light output from each of the lighting devices 51a to 51d and 52a to 52d, the intensity of the light applied to the subject can be made substantially uniform.

  That is, as shown in FIG. 4, in the case of irradiating light on an object to be photographed, that is, a subject, if all the outputs of the lighting devices are the same, the light is concentrated too much on a part of the photographing range (subject), resulting in uneven illumination. Will appear greatly. In the case of the photographing apparatus 1 of the present embodiment, for example, as shown in FIG. 6B, light is concentrated too much near the center of the photographing range. Each circle indicated by a dotted line in FIGS. 6A and 6B represents a position where the light received by the subject from each lighting device has the same predetermined intensity (luminous intensity). That is, the distribution of altitude or the contour line of luminous intensity by each lighting device is shown. In the example of FIG. 6B, eight circles overlap in the vicinity of the center of the shooting range, but only about three overlap in the four corners of the subject, so that the light is relatively near the center. You can see that they are focused on.

  On the other hand, as in this embodiment, among the plurality of lighting devices, the outputs of the lighting devices 51a to 51d located farther from the center of the subject (shooting range) are output from the other lighting devices 52a to 52d located nearby. If it is larger than the output, a contour line of luminous intensity appears as shown in FIG. In other words, as can be seen from the fact that the number of overlapping circles is about six, the unevenness of illumination can be reduced as compared with the case where the outputs of the plurality of lighting devices are all the same.

  Returning to FIGS. 1 and 2, the main body cover 3 includes a filter plate 31 made of a synthetic resin plate or a glass plate and a lens cover 32 made of a synthetic resin plate.

  The plurality of lighting devices emit light in synchronization with the shutter and shutter speed (exposure time). That is, the power supply control unit 201 commands the lighting device driving units 261 and 262 to start supplying current at the moment when the shutter button 25 is pressed and the shutter is released. Then, it instructs to stop the supply of current in accordance with the shutter speed. The instruction to release the shutter may be issued by the personal computer 6 instead of the shutter button 25.

  Reflected light from the subject passes through the filter plate 31 and enters the casing 20, and forms an image on the image sensor 212 by the lens 211. The image sensor 212 generates imaging data by converting it into a signal.

  According to the present embodiment, since the illumination (illumination light) can be irradiated almost uniformly on the subject, it is possible to suitably photograph the subject.

  The magnitude of the current passed through the illumination devices 51a to 51d and 52a to 52d can be appropriately changed according to the shooting conditions. For example, it may be set according to the type, position, or intensity of illumination at the photographing location, the characteristics of the subject, the distance between the subject and the photographing apparatus 1, the number or arrangement of lighting devices, and the like.

  A CCD may be used as the image sensor 212 instead of the CMOS. The output of each lighting device may be adjusted as follows. For example, the lighting devices 52a to 52d may be covered with an optical filter so that the output is weaker than the lighting devices 51a to 51d. Or you may make it use the illuminating device from which light emission intensity differs, respectively as the illuminating devices 51a-51d and the illuminating devices 52a-52d.

  The lighting device may be arranged as shown in FIG. 8A to supply a stronger current to the lighting device 51 than the lighting device 52. Alternatively, it may be arranged as shown in FIG. 8B and the intensity of light irradiated may be adjusted in proportion to the distance from the photographing center.

  A circuit for fine current adjustment may be connected in parallel to each of the lighting devices 51a to 51d and 52a to 52d shown in FIG.

  An LED (light emitting diode), a lamp (bulb etc.), a fluorescent lamp, a cathode ray, and a xenon flash tube can be used for the lighting device.

[Second Embodiment]
FIG. 9 is a block diagram illustrating an example of a functional configuration of the imaging apparatus 1 according to the second embodiment, FIG. 10 is a flowchart illustrating an example of a flow of calibration processing, and FIG. 11 is an intensity of light irradiated on the calibration sheet. FIG. 12 is a diagram showing an example of the setting screen HG1.

  In 1st embodiment, as shown in FIG. 5, the same magnitude | size electric current was sent by all the four illuminating devices 51a-51d. Therefore, these lighting devices should ideally output the same intensity of light. The same applies to the lighting devices 52a to 52d.

  In practice, however, lighting devices have slightly different characteristics even if they are of the same type. In addition, the intensity of light emission may change due to the lighting device being mounted at a position deviated from the original correct position during the manufacturing process or due to long-term use. Therefore, different illuminance unevenness occurs for each photographing apparatus 1, and the obtained images may differ. In view of such problems, the second embodiment is intended to correct illuminance unevenness for each photographing apparatus 1 and make the obtained image more uniform than in the case of the first embodiment.

  The configuration and processing contents of the imaging device 1 according to the second embodiment are basically the same as those of the imaging device 1 according to the first embodiment, but there are some differences. Hereinafter, these different points will be mainly described.

  As shown in FIG. 9, each of the LEDs 51 a to 51 d is provided with an LED drive unit 261. The same applies to the LEDs 52a to 52d. Hereinafter, the LED driving unit 261 corresponding to the LEDs 51a to 51d may be described with “a” to “d” appended like “LED driving unit 261a”. The same applies to the LED driving unit 262.

  The photographing apparatus 1 is provided with a memory 22M for storing setting information 70 of current to be given to the LEDs 51a to 51d and 52a to 52d. The setting information 70 is generated by executing a calibration process, for example. Such processing is executed in the procedure as shown in FIG.

  First, the photographing apparatus 1 is switched to the calibration mode by operating an operation button provided on the personal computer 6 or the photographing apparatus 1 (# 11). An object having a uniform reflectance is placed in front of the photographing apparatus 1 and photographing is performed (# 12). For example, a calibration sheet generally used for correcting (adjusting) the difference in color of the scanner is photographed. A white sheet or the like is used as the calibration sheet.

  When the setting information 70 is already stored in the memory 22M at the time of shooting, the power supply control unit 201 supplies current to the LEDs 51a to 51d and 52a to 51d based on the contents of the setting information 70. Commands the LED driving units 261a to 261d and 262a to 262d. If the setting information 70 is not stored, a command is given to supply current based on the initial value of the photographing apparatus 1 at the time of shipment.

  Image data obtained by shooting is subjected to image processing by the image processing unit 202, and only a portion having a predetermined luminous intensity is extracted to obtain a circle as shown in FIG. 11A (# 13). These circles are obtained when the photographing unit 21 receives the reflected light of the light emitted from the LED to the calibration sheet. Note that, in order to eliminate interference between lights emitted from the respective LEDs, the LEDs may be caused to emit light one by one in order to perform photographing in step # 12.

  If there is no difference in the characteristics of the LEDs of the photographing apparatus 1, the size of the circle obtained by the LEDs 51a to 51d should be the same as shown in FIG. The same applies to the circles obtained by the LEDs 52a to 52d.

  The setting information generation unit 203 adjusts the currents to be supplied to the LEDs 51a to 51d so that the large circles have the same size, that is, these circles coincide with the ideal circle shown in FIG. The size is obtained (# 14). For example, the steps # 12 and # 13 are repeatedly performed while adjusting the current, and gradually approaching an ideal circle to obtain the magnitude of the current to be supplied. Or it calculates | requires based on the known relational expression regarding the magnitude | size of a circle | round | yen, and the magnitude | size of an electric current. The same process is performed for the small circle, and the magnitude of the current to be supplied to the LEDs 52a to 52d is obtained.

  Then, the obtained magnitude of the current to be supplied to each LED is stored in the memory 22M as setting information 70 (# 15). Note that the processing of steps # 13 and # 14 may be performed by the personal computer 6 and the setting information 70 may be stored in a magnetic storage device of the personal computer 6 or the like.

  Or you may make it obtain | require the magnitude | size of the electric current which should be supplied based on operation of the personal computer 6 by an operator. In this case, processing is performed in the following procedure.

  The personal computer 6 displays a circle image shown in FIG. 11A obtained by the processes of steps # 12 and # 13 in a window. Further, a setting screen HG1 as shown in FIG. 12 is displayed in a window different from this image window. Both windows are displayed side by side.

  In the setting screen HG1, the circles numbered 1 to 8 on the upper left correspond to the circles at the same position in FIG. 11A, and each text box and each circle in FIG. This is to inform the operator of the correspondence with the circle.

  A value for adjusting the size of each corresponding circle in FIG. 11A is input to each text box in the “coarse adjustment” column. That is, the magnitudes of currents supplied to the LEDs 51a to 51d and the LEDs 52a to 52d can be set by these text boxes. In these text boxes, for example, 8-bit values in the range of 0 to 255 are input. Therefore, when the range of current that can be supplied to each LED is 0 to 150 mA, the setting can be made in increments of about 0.59 mA.

  In each text box in the “fine adjustment” column, a value for adjusting a circuit for fine adjustment is input. That is, it is possible to finely adjust the magnitude of the current set by the coarse adjustment. In these text boxes, for example, an 8-bit value in the range of −127 to 128 is input. Therefore, when fine adjustment within the range of 10 mA is possible, setting in increments of about 0.04 mA is possible.

  The operator inputs the value of each text box on the setting screen HG1 with reference to the size of each circle included in the image of FIG. After entering, click the re-shoot button. Then, the personal computer 6 issues a photographing command to the photographing apparatus 1.

  In the photographing apparatus 1, the power supply control unit 201 illustrated in FIG. 9 supplies the LED driving units 261a to 261d and the LED driving unit so as to supply current to the LEDs 51a to 51d and the LEDs 52a to 52d according to the values input on the setting screen HG1. 262a to 262d are controlled. As a result, the same processing as steps # 12 and # 13 in FIG. 10 is performed again, and a new circle image is obtained.

  The personal computer 6 erases the previously displayed circle image and displays a newly obtained circle image. If the size of the newly obtained circle matches the size of the circle in FIG. 11B, the calibration (current adjustment) is successful. In this case, the operator clicks a setting button on the setting screen HG1. Then, each value input on the setting screen HG1 is stored as setting information 70 in the memory 22M of the photographing apparatus 1. If they do not match, the above setting operation is performed again.

  Or you may combine the adjustment process by the setting information generation part 203 or the personal computer 6, and an operator's manual adjustment process. For example, coarse adjustment may be automatically performed by a computer program, and fine adjustment may be performed by an operator's operation.

  The procedure for shooting is basically the same as in the first embodiment. However, the power supply control unit 201 controls each LED driving unit to supply current to each LED based on the setting information 70 stored in the memory 22M.

  According to the present embodiment, the calibration process is performed to reduce the difference for each LED and the uneven illuminance is corrected. Therefore, the subject can be photographed more suitably than the first embodiment.

  The calibration process may be performed before photographing, or may be performed regularly (for example, every month) as part of maintenance work of the photographing apparatus 1.

[Third embodiment]
The first imaging target is a human or animal blood vessel pattern. For example, when photographing a blood vessel pattern of a human hand, the hand is directed to the front of the photographing apparatus 1 and the shutter is released.

  When targeting a blood vessel pattern, an illumination device that emits infrared light is used. In particular, those that emit light well in the near infrared are desirable.

  As the filter plate 31, for example, a material having a property of cutting visible light and light having a shorter wavelength than that (that is, light having a wavelength of approximately 800 nm or less) and transmitting infrared rays, particularly near infrared rays, is used. Therefore, the filter plate 31 serves to prevent external visible light and the like from entering the casing 20.

  In addition, since the target is a human body, the light emission amount, the light emission time, and the light emission wavelength of the irradiation means are adjusted so that the human body is not affected.

  The emitted light is applied to the subject. However, since visible light or the like is cut by the filter plate 31, only infrared light is irradiated to the subject. Generally, human or animal blood vessels have a property of absorbing infrared rays. Therefore, the portion of the human or animal surface with blood vessels under the skin does not reflect the irradiated infrared rays very much, but the portion without blood vessels reflects well.

  The image processing unit 202 generates an image FA1 of a blood vessel pattern as shown in FIG. 7 by performing image processing on imaging data obtained by imaging. The image FA1 has been subjected to black and white reversal processing. Therefore, the white part represents the blood vessel pattern. Note that the image processing may be performed by the personal computer 6.

  According to the present embodiment, the subject can be irradiated with infrared rays almost uniformly, so that the blood vessel pattern of the subject can be suitably photographed.

  Not only a human hand but also various parts of a human or an animal can be an object to be imaged by the imaging device 1.

[Embodiment when the imaging apparatus 1 is used in a security system based on a blood vessel pattern]
13 is a diagram showing an example of a program stored in the magnetic storage device 6d, FIG. 14 is a diagram showing an example of a blood vessel pattern database 6DB, and FIG. 15 is a flowchart for explaining an example of the flow of personal confirmation processing. .

  Next, a security system using the photographing apparatus 1 will be described. Here, a security system 100 (see FIG. 3) in a company having a facility (such as a laboratory, a laboratory, a development room, or a data room) in which only authorized employees can enter will be described as an example.

  A personal computer 6 is installed in the facility. The personal computer 6 is connected to the photographing device 1 and the numeric keypad 6t according to the first or second embodiment. The photographing device 1 and the numeric keypad 6t are installed near the entrance outside the facility. Employees cannot enter the facility without operating these to obtain personal confirmation.

  A blood vessel pattern database 6DB is stored in the magnetic storage device 6d of the personal computer 6 as shown in FIG. In this blood vessel pattern database 6DB, as shown in FIG. 14, blood vessel pattern data 71 of each employee is stored in association with a user ID for identifying the employee.

  The blood vessel pattern data 71 is obtained by photographing a part of an employee's body, for example, a hand with the photographing apparatus 1 in advance. The blood vessel pattern data 71 may be stored as data of a blood vessel pattern image FA1 (see FIG. 7), and the thickness, length, number of blood vessel patterns obtained by analyzing the image, or You may store as data which show the characteristics, such as arrangement | positioning.

  In addition, a personal confirmation program 6PG is installed in the magnetic storage device 6d. By executing this program, an individual confirmation process for an employee who wants to enter the facility is performed according to the procedure shown in the flowchart of FIG.

  The employee who wants to enter the facility operates his / her numeric keypad 6t at the entrance to input his / her user ID (# 21), and shoots a part of his / her body with the photographing apparatus 1 (# 22). The input user ID and imaging data obtained by imaging are transmitted to the personal computer 6.

  The personal computer 6 searches the blood vessel pattern database 6DB for blood vessel pattern data 71 corresponding to the user ID (# 23). Then, an individual is confirmed by determining whether or not the blood vessel pattern data 71 and the imaging data obtained by imaging match (# 24).

  If they match, that is, if they are confirmed (Yes in # 25), the personal computer 6 controls to unlock the entrance (# 26). This allows employees to enter the facility. If it has not been confirmed (No in # 25), the employee is informed of a message that he / she cannot enter and that the operation is to be redone (# 27). This message may be output by, for example, a speaker provided near the entrance.

  In the case of a company having a plurality of facilities, a personal computer 6 and a photographing device 1 may be provided for each facility, and whether or not the facility can be entered is checked. Further, the blood vessel pattern database 6DB and the personal confirmation program 6PG are provided in a server connectable from each personal computer 6, and the personal confirmation processing (steps # 23 and # 24 in FIG. 10) is performed by the server. Also good. In this case, it is desirable to use the imaging device 1 according to the second embodiment as the imaging device 1 of each facility.

  The personal confirmation described above may be used not only for facility security but also for, for example, login to a computer or the like, confirmation in an electronic payment system, identification of a person at the time of going to work (time card), or the like.

  In addition, the configuration of the imaging apparatus 1 and the security system 100 as a whole or each part, the subject of imaging, the arrangement and intensity of lighting equipment, the arrangement of optical systems such as lenses, processing details, processing order, database contents, screen configuration, etc. These can be appropriately changed in accordance with the spirit of the present invention.

  As described above, the present invention is useful in that the subject can be suitably photographed by illuminating the subject substantially uniformly.

It is a perspective view which shows the example of a structure of an imaging device. It is side sectional drawing of the center vicinity of an imaging device. It is a figure which shows the example of a security system. It is a figure which shows the example of the condition of imaging | photography of a hand. It is a block diagram which shows the example of a functional structure of the imaging device in 1st embodiment. It is a figure which shows the example of distribution of the intensity of the light irradiated to the to-be-photographed object. It is a figure which shows the example of the image FA1 of the blood vessel pattern of the hand by which the image process was made. It is a figure which shows the modification of arrangement | positioning of the illuminating device seen from the front of the imaging device. It is a block diagram which shows the example of a functional structure of the imaging device in 2nd embodiment. It is a flowchart explaining the example of the flow of a calibration process. It is a figure which shows the example of distribution of the intensity of the light irradiated to the calibration sheet | seat. It is a figure which shows the example of a setting screen. It is a figure which shows the example of the program etc. which are stored in the magnetic storage device. It is a figure which shows the example of a blood vessel pattern database. It is a flowchart explaining the example of the flow of a personal confirmation process.

Claims (3)

A blood vessel pattern photographing device that also has illumination,
A light receiving means for receiving the reflected light of the infrared light irradiated to the object to be imaged ;
Having a plurality of infrared light sources disposed so as to be positioned on each of the corners and the sides of the rectangle centered on the light receiving means, and irradiation means for irradiating the infrared light for the shooting target ,
By controlling the current supplied to each infrared light source so as to increase as the distance from the light receiving means increases, the intensity of the infrared light emitted from each infrared light source is set to the arrangement position. And a control means for adjusting the light intensity, the light emission time, and the wavelength while making the intensity of infrared light applied to the object to be photographed substantially uniform and
The imaging object receives light from each infrared light source based on the reflected light of the infrared light individually irradiated by each infrared light source toward the object having a uniform reflectance received by the light receiving means. Luminous intensity information acquisition means for acquiring luminous intensity information indicating the intensity of infrared light ,
The control means obtains the intensity information obtained by the light intensity information obtaining means so that the infrared light intensity emitted from each infrared light source is the same for the infrared light sources having the same distance from the light receiving means. The current value adjusted by the luminous intensity information is stored in the memory, and the intensity of the infrared light is adjusted based on the current value stored in the memory.
A blood vessel pattern imaging apparatus characterized by the above. Control infrared light based on the length of exposure time,
The blood vessel pattern imaging device according to claim 1. Control infrared light based on exposure timing,
The blood vessel pattern imaging device according to claim 1.

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