JP2004280383A - Identification device, identification method, computer-readable storage medium and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a system for discriminating whether detected subject information is the information of a living body or the other information. <P>SOLUTION: This identification device is provided with a sensor for detecting subject information, a condition supplying means for supplying a plurality of image pickup conditions and a discriminating means for discriminating whether or not the detected subject information is the information of a living body based on the change of a plurality of subject information detected under the plurality of image pickup conditions. The change of the plurality of subject information is generated based on the supply of the plurality of image pickup conditions. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an authentication apparatus, an authentication method, a computer-readable storage medium, and a program, and more particularly to a technique for determining whether an object to be authenticated is a living body.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there has been an application in which it is necessary to determine whether detected subject information is information on a living body or other information.
[0003]
For example, there is a method of distinguishing between a living body and a fake living body based on a plurality of pieces of biological information such as conductivity, temperature, voiceprint, and motion (for example, see Patent Document 1).
In a fingerprint authentication device, a method is known in which a means for measuring a resistance value is provided on a contact surface of a sensor with a living body, thereby distinguishing the living body from a high-resistance material such as paper or rubber to prevent fraud.
[0004]
Further, for example, in order to quickly and accurately respond to disasters such as fires, storms and floods, and earthquakes, there have been many applications relating to a method for detecting the presence or absence of an intruding object entering a dangerous area such as a disaster occurrence location. One of them is to compare the reference image data of the monitoring target area captured in advance with the current image data of the monitoring target area obtained from the camera at the time of the occurrence of a disaster, and based on the comparison result, Determining means for detecting the size, moving speed, and moving direction of an approaching object, and determining whether or not the approaching object is a person; and, when it is determined that the object is a person, the position of the person and the monitoring target. There is an evacuation guidance support device that includes a detection unit that detects the presence or absence of entry into a no-entry area according to a positional relationship with a disaster occurrence location in an area (for example, see Patent Document 2).
[0005]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 2002-236666 [Patent Document 2]
JP-A-7-296068
[Problems to be solved by the invention]
The present invention provides a new method for determining whether the detected subject information is biological information or other information.
[0007]
[Means for Solving the Problems]
As one means for solving the above-mentioned problems, a sensor for detecting subject information, a condition supply unit for supplying a plurality of imaging conditions, and a plurality of subjects obtained by detecting the plurality of imaging conditions with the sensor Determining means for determining whether or not the subject information detected based on a change in information is information on a living body, wherein the change in the plurality of subject information occurs based on the supply of the plurality of imaging conditions. An authentication device is provided.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
The authentication device according to the present embodiment includes a sensor that detects subject information, a condition supply circuit that is a condition supply unit that supplies a plurality of conditions,
A determination circuit for determining whether or not the subject information detected based on a change in a plurality of subject information obtained by detecting the subject under the plurality of conditions is information on a living body; . The change in the plurality of subject information described above occurs based on the supply of the plurality of conditions by the condition supply circuit.
[0009]
Here, the sensor may be any sensor that can detect subject information, such as one having a function of converting light into an electric signal.
[0010]
In addition, the plurality of conditions may be any condition as long as the detected plurality of subject information is a living body information and the other information is different in a manner of change.
[0011]
As a more specific plurality of conditions, when the information of the living body to be detected is three-dimensional and the other information is two-dimensional, the information of the subject is three-dimensional Further, it is more preferable that the condition is such that changes in a plurality of pieces of subject information are different between a case where the subject is two-dimensional and a case where the subject is three-dimensional, utilizing the property of being two-dimensional. Further, as a plurality of more restrictive conditions, the other one is a two-dimensional one, and a three-dimensional living body is two-dimensionally copied on paper or the like by a copying machine or the like. In some cases, it is more preferable that the method of changing the three-dimensional subject information of the living body and the subject information of the two-dimensional image of the living body differ. In the first and second embodiments described below, as an example, a configuration in which an exposure amount is changed is described as a plurality of conditions.
[0012]
Next, the discrimination circuit should just be able to discriminate the difference between the way of change in the case of biological information and the way of change of other information.
[0013]
In the following first and second embodiments, a case will be described in which the configuration described above is applied to biometric fingerprint authentication as an example.
[0014]
(Embodiment 1)
FIG. 1 is a configuration block diagram of a biometric fingerprint authentication device 10 according to one embodiment of the present invention. The biometric fingerprint matching device 10 includes a display unit 11 serving as an interface with a user, a fingerprint input unit 12 including an image sensor having a plurality of photoelectric conversion units such as a CCD and a CMOS sensor, an exposure control unit 13 for controlling exposure, An image memory 14 for storing a captured fingerprint image, an image processing unit 15 for extracting a change in the shape or size of a fingerprint area from a plurality of captured fingerprint images, and comparing an amount of change in the extracted fingerprint area with an internally set threshold value. A comparison / determination unit 16 for identifying a living finger by means of a fingerprint, a fingerprint collation unit 17, and a registered fingerprint database 18 are provided.
[0015]
FIG. 2 shows a schematic configuration diagram of the fingerprint input unit 12. An image sensor 21 is disposed on the substrate, and a protective member 22 is provided on the surface of the image sensor 21 so that the image sensor 21 is not damaged by contact with a finger. An LED 23 serving as an irradiating unit for irradiating light toward a finger is arranged around the LED. The exposure controller 13 controls the lighting time of the irradiation LED 23 to adjust the exposure at the time of imaging.
[0016]
In the biometric fingerprint authentication device 10, as shown in FIG. 3, light emitted from the periphery toward the finger once penetrates into the finger, and the image sensor 21 receives light emitted from the finger pad as internal diffused light. And a fingerprint is imaged. At this time, the ridge portion of the fingerprint that is in direct contact with the protective material receives the diffused light in the finger directly incident on the image sensor, whereas the valley portion of the fingerprint attenuates the light in an air layer between the fingerprint and the valley portion. Therefore, a grayscale image corresponding to the fingerprint pattern is obtained.
[0017]
FIG. 4 illustrates a fingerprint image 1 when a biometric finger is imaged under a certain exposure condition 1 using the biometric fingerprint authentication device 10 and a change in a video signal output in a short direction of a certain row of the fingerprint image 1 above. A graph, a graph representing a change in the video signal output in the longitudinal direction of a certain column of the fingerprint image 1 on the left side, and a diagram representing a region where a substantial fingerprint image of the fingerprint image 1 is captured are shown below. . Referring to FIG. 4, in the case of the fingerprint input method using diffused light in the finger, the center of the finger having a long light penetration distance has a large light attenuation and the image becomes dark, and the finger is close to the illumination LED and has a short light penetration distance. It can be seen that the periphery is clearly imaged. Note that the exposure unevenness due to the difference in the attenuation of the internal diffused light is hereinafter referred to as finger shading. When a fingerprint image of a wide area is captured, the exposure of the center of the finger is insufficient as in the fingerprint image 1 shown in FIG. 4, but when the exposure of the central part of the fingerprint is properly performed, the fingerprint image shown in FIG. A fingerprint image in which the periphery of the fingerprint close to the illumination LED is saturated as shown in FIG.
[0018]
On the other hand, when a fake fingerprint pattern printed on paper is captured by the biometric fingerprint authentication device 10, a flat fingerprint image without finger shading is captured as shown in FIG. This is because the light transmitted through the paper surface reaches the image sensor 21 without being attenuated regardless of the position in the plane. Therefore, in the case of a fake fingerprint pattern printed on paper, even if the image is taken by changing the exposure, the brightness of the entire fingerprint image changes, but the size of the region where the fingerprint is imaged does not change.
[0019]
As described above, in the biometric fingerprint and the pseudo fingerprint, when the exposure condition is changed and the fingerprint is imaged, a difference occurs in the amount of change in the size of the fingerprint region, so that the biometric finger can be identified. In the biometric fingerprint authentication device 10, the image processing unit 15 performs a process of extracting the size of each fingerprint area from fingerprint images having different exposure conditions, and the comparison determination unit 16 compares the change in the size of the fingerprint area. When the change is equal to or greater than a certain threshold, it is determined that the finger is a living finger, and when the change is equal to or less than the threshold, it is determined to be a false fingerprint.
[0020]
FIG. 7 shows a flowchart in the case where personal identification is performed using the biometric fingerprint authentication device 10 in the first embodiment.
[0021]
First, in step 1, the biometric fingerprint authentication device 10 requests the user to input a fingerprint via the display unit 11. Next, detecting that the user puts a finger on the fingerprint input unit 12, sets the exposure control unit 13 to the exposure condition 1, drives the fingerprint input unit 12, and captures the fingerprint image 1 (step 2, 3). The captured fingerprint image 1 is stored in the image memory 14 (step 4). In step 5, it is determined whether the exposure of the fingerprint image 1 captured by the exposure control unit 13 is appropriate. If the exposure is inappropriate, the process returns to step 3, the exposure conditions are changed, and imaging is performed again. If the exposure is appropriate, the process moves to step 6.
[0022]
Subsequently, in step 6, the biometric fingerprint matching device 10 sets the exposure control unit 13 to the exposure condition 2 and captures the fingerprint image 2. The captured fingerprint image 2 is similarly stored in the image memory 14 (step 7). Since the steps 2 to 7 are completed in a short time, the fingerprint images 1 and 2 to be captured are different in only the brightness without changing the position of the fingerprint.
[0023]
In step 8, the image processing unit 17 extracts information on the size of the fingerprint area from the fingerprint images 1 and 2 stored in the image memory 14.
[0024]
In step 9, the size information 1 of the fingerprint area extracted from the fingerprint image 1 is compared with the size information 2 of the fingerprint area extracted from the fingerprint image 2, and the amount of change S between them is calculated. Further, the change amount S is compared with a certain threshold value N set therein. If the change amount S exceeds the threshold value N, it is determined that the finger is a living finger, and the process proceeds to fingerprint verification in step 10. If not, it is determined that the fingerprint is a fake fingerprint, and the process proceeds to step 11 to notify the user of authentication failure.
[0025]
Steps 8 and 9 will be described using a more specific example.
[0026]
In step 8, in the image processing 17, the fingerprint image 1 and the fingerprint image 2 stored in the image memory 14 are divided as shown in FIG. 10, and whether or not there is an image signal (fingerprint image) in each of the divided areas. Is determined, and only the area where the image signal is present is extracted from each of the divided areas.
[0027]
Specifically, in a certain portion of the image signal, a white region and a black region are almost even, and a portion without a saturated image signal is a substantially white region. , It is possible to determine the difference between a portion having an image signal and a portion having no image signal.
[0028]
In step 9, the number of regions where the image signals extracted from the fingerprint image 1 and the fingerprint image 2 are present is calculated, and both (the number S1 of the regions where the image signals of the fingerprint image 1 exist and the image signal of the fingerprint image 2) are calculated. The change amount S (S1−S2) is calculated by calculating the difference of the number S2) of the areas having the above. Furthermore, the change amount S is compared with a certain threshold N set to determine whether or not the living body is inside, and when the change amount S exceeds the threshold N, it is determined that the finger is a living finger, The process proceeds to fingerprint collation in step 10, but if the value does not exceed the threshold value N, it is determined to be a fake fingerprint, and the process proceeds to step 11 to notify the user of authentication failure.
[0029]
In the above description, the configuration for detecting a change in the size of the fingerprint image has been described.For example, by changing the arrangement of the illumination LED and changing the irradiation position, the case of the fingerprint of the living finger and the case of the false fingerprint are obtained. Thus, the size of the fingerprint image does not change, but the shape of the fingerprint image may change. Also in this case, similarly to the above, the fingerprint image 1 and the fingerprint image 2 stored in the image memory 14 are divided as shown in FIG. 10, and whether or not there is an image signal (fingerprint image) in each of the divided areas. Is determined, and only the area where the image signal is present is extracted from each of the divided areas.
[0030]
Then, the fingerprint image 1 and the fingerprint image 2 are compared, the number of non-overlapping areas in the image signal of both is detected, and if the number exceeds the threshold, it is determined that the finger is a living finger. Otherwise, it is determined to be a false fingerprint.
[0031]
In step 10, the fingerprint collation unit 17 collates one of the inputted fingerprint image 1 and fingerprint image 2 with the fingerprint image already registered in the fingerprint image database 18. As a result of the collation, if it is determined that the fingerprints do not match, the process proceeds to step 11 and notifies the user of an authentication error. On the other hand, when it is determined that the fingerprints match, actions such as unlocking, system use permission, and electronic approval are performed (step 12).
[0032]
Although the fingerprint image 2 used in the description is assumed to have a larger exposure amount than the fingerprint image 1, even if the exposure amount changes to such an extent that the size of the fingerprint area changes even if the reverse, the biometric finger is used. Can be identified, and there is no change in essence.
[0033]
As described above, when performing fingerprint collation, a living finger can be identified from a change in the size of a fingerprint area of a fingerprint image captured by changing the exposure amount. Therefore, it is not necessary to newly install a resistance measuring device or a temperature sensor for determining whether the device is a living body, and the device can be downsized. Further, since it is possible to perform fingerprint collation using either the fingerprint image 1 or the fingerprint image 2, it is not necessary to take an image for collation after identifying whether the fingerprint is a living finger. Thus, the authentication time can be shortened.
[0034]
(Embodiment 2)
The biometric fingerprint authentication device according to the second embodiment has the same configuration blocks as the first embodiment, and the configuration of the fingerprint input unit 12 and the principle of fingerprint imaging are also the same. However, in the second embodiment, the exposure control unit 13 is capable of controlling the exposure within one frame, so that the size of the fingerprint area of the partial fingerprint image captured in the same frame while changing the exposure condition is changed. It is characterized by using the change to identify a living finger.
[0035]
As already described in the first embodiment, in the biometric fingerprint authentication device 10, when the biometric fingerprint and the false fingerprint are imaged under different exposure conditions, the difference in the size of the fingerprint area is different. , The living finger can be identified. At this time, in the first embodiment, a plurality of frame images taken under different exposure conditions are used.
[0036]
On the other hand, in the case of the biometric fingerprint authentication device 10 described in the second embodiment, since the exposure control unit 13 can change the exposure in the same frame, the change in the size of the fingerprint area is extracted. Therefore, it is not necessary to acquire a plurality of frame images, and the time from fingerprint imaging to authentication can be reduced.
[0037]
FIG. 8 shows a fingerprint image when a biometric finger is imaged by the biometric fingerprint authentication device 10 of the second embodiment. Here, the image sensor 21 scans in the short direction from the upper left of the screen, and when reaching the right end, the scanning line moves to the left end of the next line, and the exposure amount increases from the xth line. Note that the exposure amount may be changed by the lighting amount of the illumination LED 23, or may be changed by the accumulation time of the electronic shutter if the imaging device has an electronic shutter. Referring to FIG. 8, it can be seen that when a living finger is imaged using the biometric fingerprint authentication device 10 according to the second embodiment, a discontinuity point occurs in the fingerprint area at a point where the exposure amount changes. On the other hand, when a fake fingerprint is imaged using the same exposure method, the brightness of the fingerprint image changes at the exposure change point, but the shape of the fingerprint area maintains a continuous change. The biometric fingerprint authentication device 10 according to the second embodiment uses this difference to identify a biometric finger.
[0038]
FIG. 9 shows a flowchart in the case where personal identification is performed using the biometric fingerprint authentication device 10 described in the second embodiment.
[0039]
First, in step 1, the biometric fingerprint authentication device 10 requests the user to input a fingerprint via the display unit 11. Next, in step 2, when it is detected that the user puts a finger on the fingerprint input unit 12, the exposure control unit 13 first sets the exposure condition 1 and scans up to the x-th line. Thereafter, the exposure condition 2 is set, and the entire fingerprint image 3 is captured (steps 2 and 3). The captured fingerprint image 3 is stored in the image memory 14 (step 4). In step 5, it is determined whether the exposure of the fingerprint image 3 captured by the exposure control unit 13 is appropriate. If the exposure is inappropriate, the process returns to step 3, the exposure conditions are changed, and imaging is performed again. If the exposure is appropriate, the process moves to step 6.
[0040]
In step 6, each fingerprint area is extracted from the partial image of the fingerprint image 3 captured under the exposure conditions 1 and 2. Further, a change amount T is calculated from the fingerprint area data extracted by the comparison / determination unit 16, and a comparison is made with a threshold value O set therein (step 7). Here, as a specific example of the method of calculating the amount of change T, there is a method of determining whether there is an image signal in each of the divided regions shown as a specific example in the first embodiment. If the change amount T calculated in step 7 exceeds the threshold value O, it is determined that the finger is a living finger, and the process proceeds to fingerprint verification in step 9. Then, after notifying the user of the authentication failure in step 8, the process returns to step 1 to prompt the user to input the fingerprint again.
[0041]
In step 9, the collation unit 17 collates the inputted fingerprint image 3 with the fingerprint image already registered in the fingerprint image database 8. If it is determined that the fingerprints do not match, the process proceeds to step 10 and notifies the user that an authentication error has occurred. On the other hand, when it is determined that the fingerprints match, actions such as unlocking, system use permission, and electronic approval are performed (step 11).
[0042]
As described above, when a fingerprint image is captured by changing the exposure amount within one frame, it is possible to determine the living finger from the change in the shape of the fingerprint area of the partial image having the different exposure amount. It is possible to both determine whether or not the subject is a living body and identify whether or not the fingerprint belongs to the person only by imaging. Therefore, the authentication time can be further reduced as compared with the first embodiment.
[0043]
In the first embodiment, the image memory 14 needs a space for storing image signals for two frames. In the present embodiment, the image memory 14 stores image signals for one frame. With a small space, the size of the apparatus can be further reduced as compared with the first embodiment.
[0044]
As described above, in the biometric fingerprint authentication devices according to the first and second embodiments, the imaging element 21 and the protection member 22 which are sensors for detecting subject information, and the conditions for supplying a plurality of imaging conditions such as changing the exposure amount. It is determined whether or not the subject information detected based on a change in a plurality of subject information obtained by detecting a plurality of subject information obtained by detecting with the LED 23 and the exposure control unit 13 and a sensor under a plurality of imaging conditions is information on a living body. It has an image memory 14, an image processing unit 15, and a comparison / determination unit 16, which are distinguishing means, and a change in a plurality of subject information occurs based on a supply of a plurality of imaging conditions. A registered fingerprint database 18 which is storage means for storing the biometric information stored therein, and is stored in the storage means when the discrimination means determines that the information is biometric information. By having the fingerprint verification unit 17 is a collating means for collating the subject information detected by the biometric information and the sensor, it is possible to determine whether it is accurately bio finger.
[0045]
In the first and second embodiments, a plurality of pieces of subject information for determining whether a subject is a living body has been described as a fingerprint. However, the present invention is not limited to this. If so, the same can be applied.
[0046]
In the first and second embodiments, the biometric fingerprint authentication device that determines whether or not the user is the user has been described as the application of the device that determines whether the information is biometric information. May be.
[0047]
(Other embodiments)
A software program for realizing the functions of the above-described embodiments is provided to an apparatus connected to the various devices or a computer in the system so that the various devices operate to realize the functions of the above-described embodiments. The present invention also includes a code that is supplied and executed by operating the various devices according to a program stored in a computer (CPU or MPU) of the system or the apparatus.
[0048]
In this case, the software program code itself implements the functions of the above-described embodiment, and the program code itself constitutes the present invention. As a transmission medium for the program code, a communication medium (a wired line or a wireless line such as an optical fiber) in a computer network (LAN, a WAN such as the Internet, a wireless communication network, etc.) system for transmitting and supplying the program information as a carrier wave. Etc.) can be used.
[0049]
Further, a means for supplying the program code to a computer, for example, a recording medium storing the program code constitutes the present invention. As a recording medium for storing such a program code, for example, a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a magnetic tape, a nonvolatile memory card, a ROM, and the like can be used.
[0050]
When the computer executes the supplied program code, not only the functions of the above-described embodiments are realized, but also the OS (Operating System) or other application software running on the computer. Needless to say, such a program code is also included in the embodiment of the present invention when the functions of the above-described embodiment are realized in cooperation with the above.
[0051]
Further, after the supplied program code is stored in a memory provided in a function expansion board of a computer or a function expansion unit connected to the computer, a CPU provided in the function expansion board or the function expansion unit based on the instruction of the program code. It is needless to say that the present invention also includes a case where the functions of the above-described embodiments are implemented by performing part or all of the actual processing.
[0052]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the authentication device of this invention, it becomes possible to determine whether it is the information of a living body appropriately.
[Brief description of the drawings]
FIG. 1 is a configuration block diagram of a biometric fingerprint authentication device 10 according to the present embodiment.
FIG. 2 is a schematic configuration diagram of a fingerprint input unit 12 of the biometric fingerprint authentication device 10 according to the present embodiment.
FIG. 3 is a diagram illustrating the principle of capturing a fingerprint.
FIG. 4 is a fingerprint image 1 captured under exposure condition 1.
FIG. 5 is a fingerprint image 2 captured under exposure condition 2.
FIG. 6 is a fake fingerprint image obtained by imaging a fake fingerprint printed on a sheet of paper.
FIG. 7 is a flowchart showing a series of processes of the biometric fingerprint authentication device shown in the first embodiment.
FIG. 8 is a fingerprint image 3 captured by changing the exposure amount within one frame.
FIG. 9 is a flowchart showing a series of processes of the biometric fingerprint authentication device shown in the second embodiment.
FIG. 10 is a diagram illustrating a specific example of fingerprint region extraction described in the first and second embodiments.
[Explanation of symbols]
Reference Signs List 10 Biometric fingerprint authentication device 11 Display unit 12 Fingerprint input unit 13 Exposure control unit 14 Image memory 15 Image processing unit 16 Comparison judgment unit 17 Fingerprint collation unit 18 Registered fingerprint database 21 Image sensor 22 Protective material 23 Lighting LED

Claims (15)

A sensor that detects subject information,
Whether or not the subject information detected based on a change in a plurality of subject information obtained by detecting the plurality of subject information under the plurality of imaging conditions with the sensor using a condition supply unit that supplies a plurality of imaging conditions is information on a living body Determining means for determining;
Has,
The authentication apparatus according to claim 1, wherein the change in the plurality of pieces of subject information occurs based on the supply of the plurality of imaging conditions. The authentication device according to claim 1, wherein the sensor has a plurality of photoelectric conversion units. 3. The apparatus according to claim 1, wherein the plurality of conditions are conditions under which a change in the plurality of subject information is different between a case where the subject is two-dimensional and a case where the subject is three-dimensional. 4. Authentication device. The authentication device according to claim 3, wherein the two-dimensional subject is a two-dimensional photograph of the three-dimensional subject. The authentication device according to claim 1, wherein the plurality of conditions are changed by adjusting an exposure amount when the subject information is detected by the sensor. Irradiating means for irradiating the subject with light from a peripheral portion of the subject,
The authentication apparatus according to claim 5, further comprising: an exposure control unit that controls the irradiation unit to adjust an exposure amount when the subject information is detected by the sensor. The method according to claim 1, wherein the determining unit calculates a change amount of the plurality of pieces of subject information, and determines whether the subject is a desired subject by comparing the calculated change amount with a predetermined threshold. 7. The authentication device according to any one of 1 to 6. The authentication apparatus according to claim 1, wherein the subject information is biometric information representing a characteristic of an individual. The authentication device according to claim 8, wherein the biometric information is fingerprint information. The plurality of pieces of subject information include a first subject image captured in a first area in the sensor at a first exposure amount, and a second exposure amount at a timing different from a timing at which the first subject image is captured. The authentication apparatus according to claim 1, further comprising: a second subject image captured in the first area in the sensor. The plurality of pieces of subject information include a first subject image captured in a first region in the sensor at a first exposure amount and a second subject image different from the first region in the sensor at a second exposure amount. The authentication device according to claim 1, further comprising a second subject image captured in the area. Storage means for storing pre-registered biometric information;
2. A collating means for collating biometric information stored in said storage means with subject information detected by said sensor when said discriminating means determines that the information is biological information. 12. The authentication device according to any one of claims 11 to 11. An authentication method for determining whether or not the subject information detected based on a change in a plurality of subject information obtained by detecting the subject information under a plurality of imaging conditions with a sensor for detecting subject information is biological information. ,
The authentication method according to claim 1, wherein the change in the plurality of pieces of subject information occurs based on the supply of the plurality of imaging conditions. A sensor for detecting subject information, a computer having a procedure for determining whether or not the subject information detected based on changes in a plurality of subject information obtained by detecting the subject information under a plurality of imaging conditions is biological information; A readable storage medium,
The computer-readable storage medium according to claim 1, wherein the change in the plurality of pieces of subject information occurs based on the supply of the plurality of imaging conditions. A sensor for detecting subject information, a computer having a procedure for determining whether or not the subject information detected based on changes in a plurality of subject information obtained by detecting the subject information under a plurality of imaging conditions is biological information; Data readable program,
The computer-readable program according to claim 1, wherein the change in the plurality of pieces of subject information occurs based on the supply of the plurality of imaging conditions.

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