技术领域technical field
本发明涉及生物体认证装置。The present invention relates to a biometric authentication device.
背景技术Background technique
使用生物体信息对利用者进行认证的生物体认证装置在各种各样的设备及系统中被利用。当用生物体认证装置进行本人认证时，利用者通过进行将手指或眼睛这样的身体的规定部位罩在认证装置上的动作或注视的动作(认证操作)，来读取生物体信息，将从生物体信息提取出的特征量与本人预先注册的生物体信息的特征量进行对照而计算对照一致度，根据一致度是否超过规定的阈值，进行本人的判定。Biometric authentication devices that authenticate users using biometric information are used in various devices and systems. When performing personal authentication with a biometric authentication device, the user reads biometric information by putting a predetermined part of the body such as fingers or eyes on the authentication device or watching (authentication operation), and the The feature quantity extracted from the biometric information is compared with the feature quantity of the biometric information registered in advance by the person to calculate the matching degree, and the judgment of the person is performed based on whether the matching degree exceeds a predetermined threshold.
在本发明的背景技术中，有日本特开2011－2988号公报(专利文献1)。在该公报中，记载有“提供一种指静脉认证装置，即使是手指短而细的儿童的手指，也不用与成年人分开准备其他的专用的指静脉认证装置就能够进行认证处理。”的技术(参照说明书摘要)。此外，作为另一背景技术，有日本特开2013－149115号公报。在该公报中，记载有“提供一种能够减轻由指根部位的静脉的压迫造成的认证率下降的指静脉认证装置。”的技术(参照说明书摘要)。As the background art of the present invention, there is Japanese Unexamined Patent Publication No. 2011-2988 (Patent Document 1). In this gazette, it is described that "provide a finger vein authentication device, even if it is a child's finger with short and slender fingers, the authentication process can be performed without preparing another dedicated finger vein authentication device separately from that of an adult." Technology (refer to the abstract of specification). Moreover, as another background art, there exists Unexamined-Japanese-Patent No. 2013-149115. This gazette describes the technique of "providing a finger vein authentication device capable of reducing the reduction in authentication rate due to compression of veins at the root of the finger." (see Abstract).
现有技术文献prior art literature
专利文献patent documents
专利文献1：日本特开2011－2988号公报Patent Document 1: Japanese Patent Laid-Open No. 2011-2988
专利文献2：日本特开2013－149115号公报Patent Document 2: Japanese Patent Laid-Open No. 2013-149115
发明内容Contents of the invention
发明要解决的课题The problem to be solved by the invention
在指纹认证装置或指静脉认证装置等将手指放置到设定的位置、用相机或静电传感器等各种传感器取得生物体信息的生物体认证装置中，难以在每次认证中都将手指放置到设定的位置。因此，在注册时和认证时能够取得的生物体信息不同，由此有认证精度变差的问题。In a biometric authentication device such as a fingerprint authentication device or a finger vein authentication device, in which a finger is placed at a set position and biometric information is acquired by various sensors such as a camera or an electrostatic sensor, it is difficult to place a finger in every authentication. set location. Therefore, biometric information that can be acquired at the time of registration and at the time of authentication is different, and thus there is a problem that authentication accuracy deteriorates.
为了解决该问题，在以往的生物体认证装置中，在放置指尖的的部分处设置如图7所示的与指尖的形状相似的凹陷，限制指尖向前后左右移动，成为能够每次将手指放置到相同的位置的结构。但是，手指的粗细有个人差异，在将比凹陷细的手指放置的情况下，不能限制左右方向的偏移。In order to solve this problem, in the conventional biometric authentication device, a depression similar to the shape of the fingertip as shown in FIG. A structure that puts fingers in the same position. However, there are individual differences in the thickness of fingers, and when a finger thinner than the dent is placed, deviation in the left-right direction cannot be restricted.
此外，在日本特开2011－2988号公报中，提出了一种通过设置中间导引部而能够应对长度较长的手指和较短的手指双方的装置。但是，在该装置中，由于应对各种长度的手指，所以在达不到前导引部的较短的手指时，不能限制前后方向的移动，所以难以限制前后方向的偏移。In addition, JP 2011-2988 A proposes a device capable of handling both long fingers and short fingers by providing an intermediate guide. However, since this device supports fingers of various lengths, movement in the front-rear direction cannot be restricted for short fingers that cannot reach the front guide, so it is difficult to restrict deviation in the front-rear direction.
此外，在日本特开2013－149115号公报中，提出了一种用V字型的手指放置台、不论手指的粗细如何都限制左右方向的偏移的装置。但是由于较细的手指和较粗的手指距拍摄元件的距离不同，所以如果使焦点距离与某一方匹配则有可能另一方的焦点没对准而不能拍摄正确的图像。In addition, JP-A-2013-149115 proposes a device that uses a V-shaped finger rest to restrict deviation in the left-right direction regardless of the thickness of the fingers. However, since thinner fingers and thicker fingers are at different distances from the imaging element, if one of the focal lengths is matched, the other may be out of focus and a correct image may not be captured.
所以，本发明提供一种即使在手指的粗细有个人差异的情况下也能够进行稳定的手指放置的生物体认证装置。Therefore, the present invention provides a biometric authentication device capable of stably placing a finger even when there are individual differences in the thickness of the finger.
用来解决课题的手段means to solve problems
作为用来解决上述课题的一个技术方案，提供一种生物体认证装置，基于生物体信息进行认证，具备由指尖底面部、指尖面部以及指尖侧面部构成的指尖放置部；指尖底面部与手指的指腹部分接触，指尖面部与指尖底面部大致垂直地连接，具有与手指的前端以规定的角度接触的面，指尖侧面部与指尖面部及指尖底面部连接，具有与手指的侧面对置的面。As a technical solution for solving the above-mentioned problems, there is provided a biometric authentication device that performs authentication based on biometric information, and includes a fingertip resting portion composed of a bottom face of a fingertip, a face of a fingertip, and a side face of a fingertip; The bottom surface is in contact with the fingertip portion of the finger, the fingertip surface is connected to the bottom surface of the fingertip approximately perpendicularly, and has a surface that contacts the tip of the finger at a predetermined angle, and the side surface of the fingertip is connected to the fingertip surface and the bottom surface of the fingertip. , having a face opposite the side of the finger.
发明效果Invention effect
根据本发明，在将手指放置在设定的位置来取得生物体信息的生物体认证装置中，不论手指的粗细如何，都能够抑制位置偏移而放置手指。由此，在注册时和认证时能够取得相同的生物体信息，所以能够提高生物体认证的认证精度。According to the present invention, in the biometric authentication device that acquires biometric information by placing a finger at a set position, it is possible to place the finger while suppressing positional deviation regardless of the thickness of the finger. As a result, the same biometric information can be obtained at the time of registration and at the time of authentication, so that the authentication accuracy of biometric authentication can be improved.
上述以外的课题、结构及效果通过以下的实施方式的说明会变得更加清楚。Problems, configurations, and effects other than those described above will become clearer from the description of the following embodiments.
附图说明Description of drawings
图1是表示指静脉认证装置的整体形状的外观图。FIG. 1 is an external view showing the overall shape of a finger vein authentication device.
图2是表示指静脉认证装置的装置结构的框图。FIG. 2 is a block diagram showing the device configuration of the finger vein authentication device.
图3是表示指尖放置部的形状的图。Fig. 3 is a diagram showing the shape of a fingertip rest.
图4是表示指尖放置部的形状的图。FIG. 4 is a diagram showing the shape of a fingertip rest portion.
图5是表示使用指静脉认证装置的交易的流程图。Fig. 5 is a flowchart showing a transaction using a finger vein authentication device.
图6是表示在指静脉认证装置的显示部上显示的画面的图。6 is a diagram showing a screen displayed on a display unit of the finger vein authentication device.
图7是表示以往的指静脉认证装置的指尖放置部的形状的图。7 is a diagram showing the shape of a fingertip resting portion of a conventional finger vein authentication device.
具体实施方式Detailed ways
以下，使用附图对本发明的实施方式进行说明。另外，在本实施方式中，作为生物体认证装置的一例而举指静脉认证装置进行说明。Embodiments of the present invention will be described below using the drawings. In addition, in this embodiment, a finger vein authentication device will be described as an example of a biometric authentication device.
实施例1Example 1
图1是表示应用了本实施方式的指静脉认证装置100的整体形状的外观图。图1(a)是将指静脉认证装置100从上方观察的俯视图。图1(b)是用图1(a)的俯视图中表示的A－A线切断时的右剖视图。图1(c)是将指静脉认证装置100从斜上方观察的立体图。FIG. 1 is an external view showing the overall shape of a finger vein authentication device 100 to which this embodiment is applied. FIG. 1( a ) is a plan view of the finger vein authentication device 100 viewed from above. Fig. 1(b) is a right cross-sectional view taken along the line AA shown in the top view of Fig. 1(a). FIG. 1( c ) is a perspective view of the finger vein authentication device 100 viewed obliquely from above.
指尖面部101是与被放置在指静脉认证装置100上的手指116的前端部接触的面。指尖侧面部102是与手指116的前端部的侧面接触的面。指尖底面部103是与手指115的前端部的底面(也称作手指的指腹部分)接触的面。指尖导引部104是对于使用指静脉认证装置100的人显示放置手指的位置的半圆形状的导引部。也可以将指尖面部101、指尖侧面部102及指尖底面部103一起统称为指尖放置部105。此外，在指尖放置部105中，也可以加上指尖导引部104来统称。关于指尖放置部105的详细情况在后面叙述。另外，所谓手指116的前端部，设为从手指116的第一关节到指尖进行说明，但根据个人差异，也可以包括第一关节前后的部分。Fingertip surface 101 is a surface that contacts the tip of finger 116 placed on finger vein authentication device 100 . The fingertip side surface 102 is a surface in contact with the side surface of the tip of the finger 116 . The fingertip bottom surface 103 is a surface that is in contact with the bottom surface of the tip of the finger 115 (also referred to as the pad portion of the finger). The fingertip guide 104 is a semicircular guide that shows the position to place a finger for a person using the finger vein authentication device 100 . The fingertip surface 101 , the fingertip side surface 102 , and the fingertip bottom surface 103 may be collectively referred to as the fingertip resting portion 105 . In addition, the fingertip guide part 104 may also be added to the fingertip resting part 105 to collectively refer to it. Details of the fingertip rest unit 105 will be described later. In addition, the front end of the finger 116 is described as being from the first joint of the finger 116 to the fingertip, but it may include the front and back of the first joint according to individual differences.
指根放置部106是支承向指静脉认证装置100出示的手指116的根部的支承部。近红外光发光部109朝向被放置在指尖放置部105和指根放置部106上的手指116的侧面上方从手指的两侧发出近红外光。在本实施方式中从手指116的两侧照射，但也可以调整近红外光发光部109的配置而从单侧照射。拍摄窗部107处于指尖放置部105与指根放置部106之间，位于被放置的手指116的第一关节到第2关节的附近，并且设置阶差而构成，以免与手指直接接触。此外，在拍摄窗部107设有仅使近红外线以上的较长的波长透射的近红外透射滤波器，减小了从近红外光发光部109以外向手指116照射的太阳光等外界光的影响。作为滤波器，除了使近红外线以上的较长的波长透射的近红外光透射滤波器以外，也可以使用将比近红外线短的波长和长的波长双方切断而仅使近红外光透射的带通滤波器。在拍摄窗部107的下方(装置的底面侧)，设有拍摄从近红外光发光部109发出并透射了手指116的透射光的拍摄部108。The base of the finger 106 is a support for supporting the base of the finger 116 presented to the finger vein authentication device 100 . The near-infrared light emitting part 109 emits near-infrared light from both sides of the finger toward the upper side of the finger 116 placed on the fingertip rest part 105 and the finger base rest part 106 . In this embodiment, the finger 116 is irradiated from both sides, but the arrangement of the near-infrared light emitting unit 109 may be adjusted to irradiate from one side. The photographing window 107 is located between the fingertip resting portion 105 and the finger base resting portion 106, and is located near the first joint to the second joint of the placed finger 116, and is configured with steps to avoid direct contact with the fingers. In addition, a near-infrared transmission filter that transmits only longer wavelengths than near-infrared rays is provided in the imaging window 107, thereby reducing the influence of external light such as sunlight irradiated on the finger 116 from outside the near-infrared light emitting unit 109. . As a filter, in addition to a near-infrared light-transmitting filter that transmits longer wavelengths than near-infrared rays, a band-pass filter that transmits only near-infrared light by cutting off both wavelengths shorter and longer than near-infrared rays can also be used. filter. Below the imaging window 107 (on the bottom side of the device), there is provided an imaging unit 108 that captures transmitted light emitted from the near-infrared light emitting unit 109 and transmitted through the finger 116 .
输入部110在将指静脉认证装置100操作时，受理来自操作者的输入。在本实施方式中，设有输入部110－1～110－4这4个，作为选择显示内容的按钮110－1(SELECT)、切换显示内容的按钮110－2、110－3(显示三角形的图形)、决定输入的按钮110－4(ENTER)而分别分配功能。另外，输入部110的数量并不限定于4个，对输入部110分配的功能也可以分配在本实施方式中说明的功能以外的功能。The input unit 110 accepts an input from an operator when operating the finger vein authentication device 100 . In this embodiment, four input units 110-1 to 110-4 are provided as buttons 110-1 (SELECT) for selecting display content, and buttons 110-2 and 110-3 (triangular display buttons) for switching display content. graphics) and the button 110-4 (ENTER) to determine the input and assign functions to them respectively. In addition, the number of input units 110 is not limited to four, and functions other than those described in this embodiment may be allocated to the functions assigned to the input units 110 .
显示部111是在进行了生物体认证时显示认证成功或认证失败等信息的显示部。由LCD、有机EL等显示装置构成。关于在显示部111上显示的画面等，在后面叙述。另外，也可以如触摸面板那样将显示部111和输入部110合并为一个。The display unit 111 is a display unit that displays information such as authentication success or authentication failure when biometric authentication is performed. Consists of display devices such as LCD and organic EL. The screen and the like displayed on the display unit 111 will be described later. In addition, the display unit 111 and the input unit 110 may be integrated into one like a touch panel.
SIM卡插槽112为盖形状，如果将盖打开，则将SIM卡相对于能够达到的未图示的插槽插入/取出。在被插入的SIM卡中，可以存储认证中使用的生物体信息的模板等，在认证时利用。另外，在SIM卡内也可以具备控制芯片，也能够使用控制芯片进行卡内认证。The SIM card slot 112 has a cover shape, and when the cover is opened, the SIM card can be inserted into/removed from an accessible slot (not shown). In the inserted SIM card, a template of biometric information used for authentication can be stored and used for authentication. In addition, a control chip may be provided in the SIM card, and in-card authentication may be performed using the control chip.
LED113是能够表示指静脉认证装置100的状态的发光部。例如，在使用后述的外部连接I/F114而与未图示的外部装置连接并将指静脉认证装置100充电的情况下等，能够通过使LED以红色发光来表示是充电中。此外，也可以在生物体认证失败时发出表示认证失败的颜色。LED 113 is a light emitting unit capable of indicating the state of finger vein authentication device 100 . For example, when charging the finger vein authentication device 100 by connecting to an external device (not shown) using the external connection I/F 114 described later, it is possible to indicate that charging is in progress by lighting the LED in red. In addition, when biometric authentication fails, a color indicating authentication failure may be emitted.
外部连接I/F114是在将指静脉认证装置100与未图示的外部装置连接时使用的连接部。在本实施方式中，将外部连接I/F114设为USB(Universal Serial Bus)而进行说明，但并不限于USB，也可以是其他通信规格。另外，外部装置是具备能够与USB等外部连接I/F114连接的I/F的计算机等。此外，为了将外部连接I/F114与后述的无线通信部203区分，也有称作有线通信部的情况。External connection I/F 114 is a connection unit used when connecting finger vein authentication device 100 to an external device not shown. In this embodiment, the external connection I/F 114 is described as USB (Universal Serial Bus), but it is not limited to USB, and may be other communication standards. In addition, the external device is a computer or the like provided with an I/F connectable to the external connection I/F 114 such as USB. In addition, in order to distinguish the external connection I/F 114 from the wireless communication unit 203 described later, it may be called a wired communication unit.
切换部115是切换指静脉认证装置100的电源的接通(ON)/断开(OFF)并切换指静脉认证装置100与外部装置的连接的切换部。本实施方式中假设与外部装置的连接具备使用外部连接I/F114的连接和使用无线通信的连接这两种而进行说明。切换部115如图1(C)所示，能够向左(箭头B方向)、中央、右(箭头C方向)这3个地方切换。例如，在切换为左(箭头B方向)的情况下选择通过USB的连接，在切换为右(箭头C方向)的情况下选择通过无线通信的连接。此外，中央选择电源断开。另外，在本实施方式中，设为无线通信采用Bluetooth(注册商标)而进行说明，但也可以安装Bluetooth(注册商标)以外的无线通信的规格。The switching unit 115 is a switching unit that switches ON/OFF the power of the finger vein authentication device 100 and switches the connection between the finger vein authentication device 100 and an external device. In the present embodiment, it is assumed that the connection to the external device includes two types of connection using the external connection I/F 114 and connection using wireless communication. As shown in FIG. 1(C) , the switching unit 115 can be switched to three places: left (direction of arrow B), center, and right (direction of arrow C). For example, when switching to the left (direction of arrow B), connection by USB is selected, and when switching to the right (direction of arrow C), connection by wireless communication is selected. In addition, the central selection power is disconnected. In addition, in the present embodiment, Bluetooth (registered trademark) is used for wireless communication, but it is also possible to implement wireless communication standards other than Bluetooth (registered trademark).
阶差119是设置在指尖底面部103与拍摄窗部107之间的阶差。此外，阶差120是设置在指根放置部106与拍摄窗部107之间的阶差。由点线的圆表示的部分对应于各阶差，详细情况在后面叙述。The step 119 is a step provided between the fingertip bottom 103 and the imaging window 107 . In addition, the step 120 is a step provided between the finger base rest portion 106 and the photographing window portion 107 . Portions indicated by dotted circles correspond to the respective steps, and the details will be described later.
图2是说明本实施方式的指静脉认证装置100的装置结构的框图。另外，关于在上述中说明的结构，由于重复所以省略。FIG. 2 is a block diagram illustrating the device configuration of the finger vein authentication device 100 according to this embodiment. In addition, the configuration described above is omitted because it is redundant.
指静脉认证装置100由CPU201、存储器202、无线通信部203、外部连接I/F114、电源部204、SIM卡插槽112、指尖传感器205、指根传感器206、显示部111、拍摄部108、近红外光发光部109、输入部111、LED113、切换部115、声音输出部207构成，分别通过BUS或电路而连接。The finger vein authentication device 100 is composed of a CPU 201, a memory 202, a wireless communication unit 203, an external connection I/F 114, a power supply unit 204, a SIM card slot 112, a fingertip sensor 205, a root sensor 206, a display unit 111, an imaging unit 108, The near-infrared light emitting unit 109, the input unit 111, the LED 113, the switching unit 115, and the sound output unit 207 are constituted, and are respectively connected by BUS or a circuit.
CPU201是控制指静脉认证装置100的各结构的控制部。存储器202是除了由CPU201执行的程序(认证程序202－1、控制程序202－3)以外、还存储控制所需要的信息(无线连接信息202－2)等的存储部。CPU 201 is a control unit that controls various components of finger vein authentication device 100 . The memory 202 is a storage unit that stores information necessary for control (wireless connection information 202 - 2 ) and the like in addition to programs executed by the CPU 201 (authentication program 202 - 1 , control program 202 - 3 ).
无线通信部203是将指静脉认证装置100与外部装置进行无线连接的通信部。电源部204是向指静脉认证装置100供给电源的电池。电源部204在外部连接I/F114与外部装置连接时，能够将电池充电。The wireless communication unit 203 is a communication unit that wirelessly connects the finger vein authentication device 100 to an external device. The power supply unit 204 is a battery that supplies power to the finger vein authentication device 100 . The power supply unit 204 can charge the battery when the external connection I/F 114 is connected to an external device.
指尖传感器205是设置于指尖底面部103的传感器，检测指尖是否被放置。指根传感器206是设置于指根放置部106的传感器，检测指根是否被放置。在本实施方式中，关于指尖传感器205及指根传感器206，举静电传感器为例进行说明，但也可以使用静电传感器以外的传感器。此外，也可以是通过物理开关被按下而检测到被罩上了手指的传感器。The fingertip sensor 205 is a sensor provided on the bottom surface of the fingertip 103, and detects whether or not the fingertip is placed. The base of the finger sensor 206 is a sensor provided on the base of the finger 106, and detects whether the base of the finger is placed. In the present embodiment, the fingertip sensor 205 and the finger base sensor 206 are described using electrostatic sensors as examples, but sensors other than electrostatic sensors may also be used. Alternatively, it may be a sensor that detects that a finger is covered when a physical switch is pressed.
声音输出部207是用来鸣响生物体认证失败时的错误音或当对指静脉认证装置100投入了电源时等鸣响电子音的蜂鸣器等装置。The sound output unit 207 is a device such as a buzzer that sounds an error sound when the biometric authentication fails or sounds an electronic sound when the finger vein authentication device 100 is powered on.
另外，在本实施方式中，为了使说明变简单，也有程序为主体而进行控制那样的记载，但实际上使用上述的CPU等硬件资源来执行程序。In addition, in this embodiment, in order to simplify the description, it is also described that the program is mainly controlled, but actually the program is executed using hardware resources such as the above-mentioned CPU.
图3是将指静脉认证装置100的指尖放置部105和指根放置部106的附近放大、从斜上方观察的放大图。此外，图4(a)是指尖放置部105的放大俯视图，图4(b)是将图4(a)以A―A线切断时的右剖视图。图4(c)是表示将较细的手指117放置在指尖放置部105上的情况下的状态的图。图4(d)是表示将较粗的手指118放置在指尖放置部105上的情况下的状态的图。关于本实施方式的指放置部105的详细情况，使用图3、图4进行说明。FIG. 3 is an enlarged view of the vicinity of the fingertip rest portion 105 and the finger base rest portion 106 of the finger vein authentication device 100 viewed obliquely from above. In addition, FIG. 4( a ) is an enlarged plan view of the tip rest portion 105 , and FIG. 4( b ) is a right cross-sectional view when FIG. 4( a ) is cut along line AA. FIG. 4( c ) is a diagram showing a state where a thin finger 117 is placed on the fingertip rest 105 . FIG. 4( d ) is a diagram showing a state where a thick finger 118 is placed on the fingertip rest 105 . The details of the finger rest unit 105 in this embodiment will be described with reference to FIGS. 3 and 4 .
本实施方式的指放置部105如上述那样由指尖面部101、指尖侧面部102、指尖底面部103构成。The finger rest portion 105 of the present embodiment is composed of the fingertip surface 101 , the fingertip side surface 102 , and the fingertip bottom surface 103 as described above.
指尖面部101是从指尖底面部103向铅直上方大致垂直地设置的面，构成为，在两个面上与指尖接触而进行支承。如图4(a)所示，从上方看起来构成三角形的两边。由该三角形的两边构成的角a是钝角，优选的是设为120度左右，以使得当将较细的手指碰抵时手指的前端接触在三角形的两边上，能够将指尖向中央部分自然地引导，并且当放置了较粗的手指时不会与指尖干涉而对生物体图像的拍摄带来影响。此外，指尖面部101的高度b优选的是使得指甲不与指尖部分100干涉、并且不会因过浅而将手指116碰抵时越过壁面那样的高度。相反在高度高的情况下，虽然手指不越过壁面，但指甲与指尖面部101接触，不能将手指放置到正确的位置。在本实施方式中，为距指尖底面部103为5mm左右的高度。The fingertip surface 101 is a surface provided substantially vertically upward from the fingertip bottom surface 103 , and is configured to contact and support the fingertip on both surfaces. As shown in Fig. 4(a), the two sides forming the triangle are viewed from above. The angle a formed by the two sides of the triangle is an obtuse angle, preferably set to about 120 degrees, so that when a thinner finger is touched, the front end of the finger touches the two sides of the triangle, and the fingertip can be naturally moved toward the central part. When a thick finger is placed, it will not interfere with the fingertip and affect the imaging of the biological image. In addition, the height b of the fingertip surface 101 is preferably such that the nail does not interfere with the fingertip 100 and does not go over the wall when the finger 116 touches it due to being too shallow. Conversely, if the height is high, the fingernails will come into contact with the fingertip surface 101 although the finger does not go over the wall surface, and the finger cannot be placed in the correct position. In the present embodiment, the height is about 5 mm from the fingertip bottom surface 103 .
指尖侧面部102与指尖面部101相连，从指尖底面部103向铅直上方大致垂直地设置，是将所放置的手指从左右在两个面上支承的支承部。指尖侧面部101的间隔c优选的是设为15～20mm左右，以使得在放置较粗的手指时不成为妨碍。另外，指尖侧面部102在被放置的手指是较细的手指的情况下不与手指接触，或者一部分接触。因此，指尖侧面部102也可以说是处于与手指的侧面对置的位置的面。此外，指尖侧面部102自身也处于相互对置的位置。指尖底面部103通过连接的指尖面部101、指尖侧面部102的形状和阶差119，从上方看起来呈五边形的形状。The fingertip side part 102 is connected to the fingertip face part 101, and is provided substantially vertically upward from the fingertip bottom face part 103, and is a supporting part that supports a placed finger on both sides from left and right. The interval c between the fingertip side portions 101 is preferably about 15 to 20 mm so that it does not interfere with placing a thick finger. In addition, when the fingertip side part 102 is placed on a thin finger, it does not contact the finger, or a part of it contacts the finger. Therefore, the fingertip side surface 102 can also be said to be a surface at a position facing the side surface of the finger. In addition, the fingertip side portions 102 themselves are also positioned to face each other. The fingertip bottom surface 103 has a pentagonal shape viewed from above due to the shape of the connected fingertip surface 101 , the shape of the fingertip side surface 102 and the step 119 .
另外，在本实施方式中，设想了为了提高生产性而将树脂进行加工并一体成型来制作指尖放置部105。因此，指尖面部101及指尖侧面部102相对于指尖底面部103大致垂直地构成。此外，指尖面部101和指尖底面部103的连接部并不垂直而具备平缓的弯曲处。指尖侧面部102和指尖底面部103的连接部也是同样的。但是，也可以将各自用不同的零件构成，然后作为1个指尖放置部105制作。在此情况下，也可以构成为，将各部的连接部位垂直地连接。In addition, in the present embodiment, it is assumed that the fingertip rest 105 is produced by processing resin and integrally molding it in order to improve productivity. Therefore, the fingertip surface 101 and the fingertip side surface 102 are formed substantially perpendicular to the fingertip bottom surface 103 . In addition, the connecting portion between the fingertip surface 101 and the fingertip bottom surface 103 is not vertical but has a gentle bend. The same applies to the connecting portion between the fingertip side surface 102 and the fingertip bottom surface 103 . However, it is also possible to manufacture each of them as a single fingertip rest part 105 by using different components. In this case, it may be configured such that the connecting portions of the respective parts are vertically connected.
这里，在说明本实施方式的指尖放置部105的效果之前，对以往的指尖放置部的问题进行说明。图7(a)是表示以往使用的指静脉认证装置的指尖放置部701的形状的图。图7(b)是将图7(a)以D―D线切断时的右剖视图。图7(c)是表示将较细的手指117放置在指尖放置部上的情况下的状态的图。图7(d)是表示将较粗的手指118放置在指尖放置部上的情况下的状态的图。Here, before describing the effects of the fingertip rest 105 of the present embodiment, problems of the conventional fingertip rest will be described. FIG. 7( a ) is a diagram showing the shape of a fingertip rest portion 701 of a conventionally used finger vein authentication device. Fig. 7(b) is a right cross-sectional view when Fig. 7(a) is cut along line DD. FIG. 7( c ) is a diagram showing a state where a thin finger 117 is placed on the fingertip rest. FIG. 7( d ) is a diagram showing a state where a thick finger 118 is placed on the fingertip rest.
图7所示的以往的指放置部的形状(以下，设为以往形状701)为与手指的形状匹配的较圆的形状，宽度通常与较粗的手指匹配而设为15mm左右。在以往形状701的情况下，由于其形状会联想到指尖，所以有用户能够直观地判断将手指放置到哪里就可以的优点。但是，当如图7(c)所示放置了指尖的宽度为10mm左右的较细的手指117时，由于以往形状701中在放置手指的部分与手指侧面间出现间隙，所以即使发生了手指中心部分的偏移702，也能够放置手指。此外，手指碰抵的部分呈半圆状，不是限制向左右方向的移动的形状，所以用户能够完全不受限制地将手指放置到偏移的位置。The shape of the conventional finger rest shown in FIG. 7 (hereinafter referred to as conventional shape 701 ) is a relatively round shape matching the shape of the finger, and the width is usually set to about 15 mm to match the thick finger. In the case of the conventional shape 701, since the shape is reminiscent of a fingertip, there is an advantage that the user can intuitively judge where to place the finger. However, when a narrow finger 117 with a fingertip width of about 10mm is placed as shown in FIG. The offset 702 of the central part also enables placement of fingers. In addition, the portion where the finger touches has a semicircular shape, and does not have a shape that restricts movement in the left and right directions, so the user can place the finger at an offset position without any restriction.
如果在注册时和认证时发生手指的位置偏移，则由拍摄部108拍摄的手指的图像在注册时和认证时不同，所以虽然是本人但识别为别人、或虽然是别人但识别为本人等的可能性变高，所以在以往形状701下发生认证精度下降的问题。If the position of the finger is shifted between the time of registration and the time of authentication, the image of the finger captured by the imaging unit 108 is different between the time of registration and the time of authentication, so that the person is recognized as someone else, or the person is recognized as the person, etc. Possibility becomes high, so in the conventional shape 701, the problem that the authentication accuracy is lowered occurs.
为了使得在放置较细的手指117时手指不偏移，需要使放置手指的部分的宽度变窄，但是，如果为了应对较细的手指117而使宽度变窄，则当放置了较粗的手指118时，发生指尖不进入到放置手指的部分中的问题。In order not to deviate the finger when placing the thinner finger 117, it is necessary to narrow the width of the part where the finger is placed. At 118, a problem occurs that the fingertip does not enter the portion where the finger is placed.
如以上这样，在以往形状701下发生难以将如较细的手指117和较粗的手指118那样有个人差异的手指正确地放置的问题。As described above, in the conventional shape 701 , there is a problem that it is difficult to correctly place fingers having individual differences such as the thinner finger 117 and the thicker finger 118 .
在本实施方式的形状中，在放置了较细的手指117的情况下，通过如图4(c)所示将手指117碰抵在指尖面部分101的三角形部分的两边上，通过指尖面部101的两边所成的角度a，自然地将手指向中央部分引导，所以能够每次都将手指放置到中央部的相同的位置。In the shape of the present embodiment, when a thinner finger 117 is placed, as shown in FIG. The angle a formed by the two sides of the face 101 naturally guides the finger toward the center, so the finger can be placed at the same position in the center every time.
此外，如图4(d)所示，在放置了宽度较粗的手指118的情况下，在本实施方式的形状中，由于由指尖面部101和指侧面部102限制了前后左右的移动，所以能够每次都将手指放置到相同的位置。In addition, as shown in FIG. 4( d ), in the case where a thicker finger 118 is placed, in the shape of this embodiment, since the front, rear, left, and right movements are restricted by the fingertip surface 101 and the finger side surface 102, So being able to place the finger in the same position every time.
如以上这样，本发明的形状能够在较细的手指117和较粗的手指118双方中每次都将手指放置到相同的位置。因此，能够防止因手指的位置偏移造成认证精度变差。As described above, the shape of the present invention can place the fingers in the same position every time for both the thinner finger 117 and the thicker finger 118 . Therefore, it is possible to prevent the authentication accuracy from deteriorating due to positional deviation of the fingers.
此外，以往形状701是当放置了手指时能够将手指原样放置、并且也能够将手指推压的形状。如果将手指较强地推压，则阻碍手指的血管的血流，有对指静脉的拍摄及认证带来影响的情况。另一方面，在本实施例的形状中，由于为用指尖面部101的两个面支撑手指的构造，所以不是将手指较强地推压的构造。因此，不会妨碍血流，对指静脉的拍摄及认证带来影响的情况也较少。特别是，如果考虑将手指向装置里侧(箭头B方向)推压的情况，则以往形状中将包括指腹的手指整体推压，但在本实施方式的形状中，由于会推压接触在指尖面部101上的面，所以影响较少。In addition, the conventional shape 701 is a shape in which the finger can be placed as it is when the finger is placed, and the finger can also be pressed. If the finger is pushed strongly, the blood flow of the blood vessels of the finger is obstructed, which may affect the photographing and authentication of the finger vein. On the other hand, in the shape of the present embodiment, since the finger is supported by both surfaces of the fingertip surface 101, it is not a structure that strongly pushes the finger. Therefore, the blood flow is not hindered, and there is less influence on the photographing and authentication of the finger veins. In particular, considering the situation of pushing the finger toward the back of the device (direction of arrow B), in the conventional shape, the entire finger including the pad is pushed, but in the shape of the present embodiment, since the pushing contact is The face on the fingertip face 101, so less affected.
进而，在本实施方式中，如图3所示，在指尖面部101的外侧设置半圆状的台阶而作为表示手指形状的指尖导引部104。通过该结构，与以往形状同样，能够使利用指静脉认证装置100的用户联想到指尖的形状，使得容易判别为是放置手指的位置。另外，指尖导引部104也可以在半圆状的台阶以外用通过涂装的颜色区分等来表示。换言之，也可以对半圆状的边缘进行联想到手指的形状的涂装。Furthermore, in this embodiment, as shown in FIG. 3 , a semicircular step is provided outside the fingertip surface 101 as the fingertip guide 104 showing the shape of the finger. With this configuration, similar to the conventional shape, the user using the finger vein authentication device 100 can be reminded of the shape of the fingertip, making it easy to determine that it is a place to place the finger. In addition, the fingertip guide 104 may be displayed by coloring or the like by painting other than the semicircular step. In other words, a semicircular edge may be painted in a shape reminiscent of a finger.
图1(b)表示将指静脉认证装置100以AA线切断的右剖视图。根据右剖视图可知，在指尖放置部105和拍摄窗部107所处的面上设有阶差119。同样，在指根放置部106和拍摄窗部107所处的面上也设有阶差120。通过在指尖放置部105、指根放置部106和拍摄窗部107分别设置阶差，具备不妨碍指尖及指根的血流的效果。换言之，即使对指尖或指根用力而将手指118推压在指尖放置部105或指根放置部106上，也能够通过阶差来确保血流，进行静脉的拍摄。FIG. 1( b ) shows a right cross-sectional view of the finger vein authentication device 100 cut along line AA. As can be seen from the right cross-sectional view, a step 119 is provided on the surface where the fingertip rest portion 105 and the photographing window portion 107 are located. Similarly, a level difference 120 is also provided on the surface where the base of the finger rest portion 106 and the photographing window portion 107 are located. By providing steps in the fingertip resting part 105, the finger base resting part 106, and the imaging window part 107, there is an effect of not hindering the blood flow of the fingertips and finger bases. In other words, even if the finger 118 is pressed against the fingertip rest 105 or the finger base rest 106 with force on the fingertip or the base of the finger, blood flow can be ensured by the step difference, and vein imaging can be performed.
此外，在没有阶差119、阶差120的情况下，当将手指较强地推压时，在拍摄窗部107的周边部，手指的皮肤成为被拉伸的状态，所以有静脉被压迫而看不到的情况。但是，通过将阶差119、阶差120从拍摄窗部107离开一定的间隔设置，能够使被压迫而看不到的部分为拍摄窗部107的外侧，即使将手指较强地推压，也能够正常地拍摄静脉图像。另外，关于阶差，在仅设有阶差119、120的某一方的情况下也具有上述效果。In addition, when there is no step 119 and 120, when the finger is pushed strongly, the skin of the finger is stretched in the peripheral part of the imaging window 107, so the vein is compressed and the Can't see the situation. However, by disposing the step 119 and the step 120 at a certain distance from the imaging window 107, the part that is pressed and cannot be seen can be outside the imaging window 107, and even if the finger is pushed strongly, it will not be visible. Vein images can be taken normally. In addition, regarding the level difference, the above-mentioned effect is also obtained when only one of the level difference 119 and 120 is provided.
接着，使用图5对本实施方式的指静脉认证处理进行说明。图5是说明认证处理及交易的流程图。Next, the finger vein authentication process of this embodiment is demonstrated using FIG. 5. FIG. Fig. 5 is a flowchart illustrating authentication processing and transactions.
另外，在本实施方式中，以已经具备在认证中使用的生物体信息(指静脉)的模板的状态进行说明。关于生物体信息的模板的制作方法，由于已经是周知的，所以省略说明。另外，假设生物体信息的模板被存储在未图示的SIM卡中。此外，这里，关于进行说明的交易，举银行的交易结算为例进行说明。具体而言，说明当在银行进行结算处理时，拥有结算权限的从业人员使用指静脉进行签名的处理。In addition, in the present embodiment, a description will be given of a state in which a template of biometric information (finger vein) used for authentication is already provided. Since the method of creating a template of biometric information is well known, description thereof will be omitted. In addition, it is assumed that a template of biometric information is stored in an unillustrated SIM card. In addition, here, regarding the transaction to be described, the transaction settlement at a bank will be described as an example. Specifically, when performing settlement processing at a bank, a process in which an employee who has settlement authority signs using a finger vein will be described.
首先，指静脉认证装置100从外部装置接收结算信息(S11)。在本实施方式中，在进行结算处理的定时从外部装置接收结算信息，但也可以预先从外部装置接收结算信息，能够在任意的定时进行结算处理。First, the finger vein authentication device 100 receives settlement information from an external device (S11). In this embodiment, the settlement information is received from the external device at the timing when the settlement process is performed, but the settlement information may be received from the external device in advance, and the settlement process can be performed at any timing.
将接收到的结算信息显示在显示部111上(S12)。使用图6对显示在显示部111上的信息进行说明。图6(a)是显示在显示部111上的结算处理的第1画面601，图6(b)是显示在显示部111上的结算处理的第2画面602。如在第1画面601上有“1/2”、在第2画面602上有“2/2”那样，可以通过输入部110的输入来切换画面而使用。这是因为，能够显示在显示部111上的字符数有限。这里，以与如第2画面602所示将“2,000,000USD”转账到账号“1234567”的转账交易有关的结算为例进行说明。由于能够像这样在指静脉认证装置100的显示部111上确认交易内容后进行结算处理，所以例如在外部装置的显示画面被恶意地篡改而没有被正确地显示的情况下，也能够通过在指静脉认证装置100侧显示正确的交易及转账目的地来安全地进行交易。The received settlement information is displayed on the display unit 111 (S12). The information displayed on the display unit 111 will be described using FIG. 6 . 6( a ) is a first screen 601 of settlement processing displayed on the display unit 111 , and FIG. 6( b ) is a second screen 602 of settlement processing displayed on the display unit 111 . The screen can be switched and used by an input from the input unit 110 such that "1/2" is displayed on the first screen 601 and "2/2" is displayed on the second screen 602 . This is because the number of characters that can be displayed on the display unit 111 is limited. Here, the settlement related to the transfer transaction of transferring "2,000,000 USD" to the account number "1234567" as shown in the second screen 602 will be described as an example. Since the settlement process can be performed after confirming the transaction details on the display unit 111 of the finger vein authentication device 100 in this way, for example, when the display screen of the external device is maliciously tampered with and is not displayed correctly, it is also possible to On the vein authentication device 100 side, the correct transaction and transfer destination are displayed, and the transaction is performed safely.
确认显示在显示部111上的信息，通过输入部110输入是继续进行交易还是中断交易。具体而言，在继续进行交易的情况下按下确认按钮，在中断交易的情况下按下取消按钮(S13)。在按下了取消按钮的情况下(S13：取消)，显示将交易中断之意的错误消息(S20)，操作结束。另一方面，在按下了确认按钮的情况下(S13：确认)，向指静脉认证的步骤前进。Confirm the information displayed on the display unit 111, and input through the input unit 110 whether to continue the transaction or to suspend the transaction. Specifically, the confirmation button is pressed when the transaction is continued, and the cancel button is pressed when the transaction is suspended (S13). When the cancel button is pressed ( S13 : cancel), an error message is displayed ( S20 ) to terminate the transaction, and the operation ends. On the other hand, when the confirmation button is pressed (S13: Confirmation), it proceeds to the step of finger vein authentication.
在指静脉认证的步骤中，首先在显示部111上进行显示以出示手指116(S14)。如果通过来自指尖传感器205及指根传感器206的输出而检测到手指116被放置到指尖放置部105及指根放置部106上，则由近红外光发光部109朝向手指116照射近红外光，由拍摄部108拍摄透射了手指116的透射光。In the step of finger vein authentication, first, a display is made on the display unit 111 to present the finger 116 (S14). When it is detected that the finger 116 is placed on the fingertip resting part 105 and the finger base resting part 106 by the outputs from the fingertip sensor 205 and the base of the finger sensor 206, the near-infrared light emitting part 109 irradiates the finger 116 with near-infrared light. , the transmitted light transmitted through the finger 116 is captured by the imaging unit 108 .
在指静脉的拍摄结束后，确认拍摄是否正确地结束(S15)。在因外界光的影响等而未能正确地拍摄到指静脉图像的情况下(S15：否)，再次在显示部111上显示要求手指116的出示的画面。在正确地拍摄到指静脉图像的情况下(S15：是)，向下个指静脉认证处理(S16)前进。After the photographing of the finger veins is completed, it is checked whether the photographing is correctly completed (S15). When the finger vein image cannot be captured correctly due to the influence of external light or the like ( S15 : NO), a screen requesting presentation of the finger 116 is displayed again on the display unit 111 . When the finger vein image is captured correctly (S15: YES), it proceeds to the next finger vein authentication process (S16).
在指静脉认证处理(S16)中，根据拍摄部109拍摄的指静脉图像计算在指静脉认证中使用的特征量，与存储在SIM卡中的生物体信息的模板实施匹配。在匹配的结果是得到了比预先设定的阈值高的评价结果的情况下判断为认证成功，在比阈值低的情况下判断为认证失败。关于特征量的计算方法及匹配的详细情况，由于是已经周知的技术，所以说明省略。此外，匹配既可以由指静脉认证装置100实施，也可以在SIM卡内实施，也可以利用这两者来实施。在以装置100和SIM卡双方实施认证处理的情况下，与某一方实施的情况相比安全性变高。In the finger vein authentication process (S16), the feature value used for finger vein authentication is calculated from the finger vein image captured by the imaging unit 109, and matched with the template of the biometric information stored in the SIM card. When the result of the matching is an evaluation result higher than a preset threshold value, it is determined that the authentication has succeeded, and when it is lower than the threshold value, it is determined that the authentication has failed. The details of the calculation method and matching of the feature quantity are omitted because they are well-known techniques. In addition, the matching may be implemented by the finger vein authentication device 100, may be implemented in the SIM card, or may be implemented using both. When the authentication process is performed by both the device 100 and the SIM card, the security becomes higher than when it is performed by any one.
在实施认证处理的结果是认证失败的情况下(S17：否)，在显示部111上显示表示认证失败的显示和确认是否重试的画面，在进行重试的情况下(S19：是)，向步骤14返回而进行同样的处理。在不进行重试的情况下(S19：否)，显示错误，结束处理。If the result of the authentication process is that the authentication fails (S17: No), a display indicating that the authentication failed and a screen for confirming whether to retry are displayed on the display unit 111, and in the case of retrying (S19: Yes), Return to step 14 and perform the same processing. When retrying is not performed (S19: NO), an error is displayed and the process ends.
在认证成功的情况下(S17：是)，向外部装置发送也可以执行结算处理的消息，处理结束(S18)。When the authentication is successful (S17: Yes), a message is sent to the external device that the settlement process can also be executed, and the process ends (S18).
根据以上，本实施方式的指静脉认证装置100中通过设置由指尖面部101、指尖侧面部102、指尖底面部103构成的指尖放置部105，即使手指116有个人差异(较细、较粗)，也能够将手指放置到相同的位置。Based on the above, in the finger vein authentication device 100 of this embodiment, by providing the fingertip resting part 105 composed of the fingertip surface 101, the fingertip side surface 102, and the fingertip bottom surface 103, even if there are individual differences in the fingers 116 (thinner, thinner, thicker), you can also place your fingers in the same position.
此外，通过在指尖放置部105设置指尖导引部104，能够对要使用认证的人使手指的放置场所变得更明确。此外，通过对指尖放置部105、指根放置部106和拍摄窗部107的面设置阶差，能够不妨碍手指116的血流而取得指静脉图像。Furthermore, by providing the fingertip guide 104 on the fingertip rest 105, the place where the finger is placed can be clarified for the person who uses the authentication. Furthermore, by providing steps in the surfaces of the fingertip rest 105 , the finger base rest 106 , and the imaging window 107 , finger vein images can be obtained without hindering the blood flow of the finger 116 .
此外，通过在显示部111上显示关于交易的信息，即使外部装置被有恶意的人变更了画面的显示，由于知道正确的交易信息，所以也能够实施正规的交易。In addition, by displaying transaction information on the display unit 111, even if the display of the external device is changed by a malicious person, since correct transaction information is known, regular transactions can be performed.
实施例2Example 2
在实施例1中，作为生物体信息而取得指静脉，但在取得指静脉以外的生物体信息的情况下也能够应用。In Embodiment 1, finger veins are acquired as biometric information, but it is also applicable to acquisition of biometric information other than finger veins.
例如，通过将指尖底面部103用透明的材料构成，使处于指尖底面部103的指尖传感器205为能够拍摄指纹的传感器，能够作为由指纹进行认证的指纹认证装置使用。此外，不仅是仅用指纹认证，还能够进行使用指纹和指静脉双方的所谓的多形式的应用。通过使用多个生物体信息，能够进一步提高安全性。For example, by making the bottom of the fingertip 103 a transparent material, the fingertip sensor 205 at the bottom of the finger 103 can be used as a sensor capable of capturing fingerprints, and can be used as a fingerprint authentication device for authentication by fingerprints. In addition, not only fingerprint authentication but also so-called multi-modal applications using both fingerprints and finger veins are possible. Security can be further improved by using a plurality of living body information.
另外，本发明并不限定于上述的实施例。例如，上述的实施例是为了将本发明容易理解地说明而详细地说明的，并不一定限定于具备所说明的全部结构。此外，可以将某个实施例的结构的一部分替换为其他实施例的结构，此外，还能够对某个实施例的结构添加其他实施例的结构。此外，关于各实施例的结构的一部分，可以进行其他结构的追加/删除/替换。In addition, this invention is not limited to the above-mentioned Example. For example, the above-mentioned embodiments have been described in detail to explain the present invention in an easy-to-understand manner, and are not necessarily limited to having all the described configurations. In addition, a part of the structure of a certain example can be replaced with the structure of another example, and the structure of another example can also be added to the structure of a certain example. In addition, addition/deletion/replacement of other configurations may be performed regarding part of the configurations of the respective embodiments.
标号说明Label description
100：指静脉认证装置；101：指尖面部分；102：指尖侧面部；103：指尖底面部；104：指尖导引部；105：指尖放置部；106：指根放置部；107：拍摄窗部；108：拍摄部；109：近红外光发光部；110：输入部；111：显示部；112：SIM卡插槽；113：LED；114：外部连接I/F；115：切换部；119；120：阶差。100: finger vein authentication device; 101: fingertip surface; 102: fingertip side; 103: fingertip bottom face; 104: fingertip guide; 105: fingertip placement; 106: finger base placement; 107: shooting window; 108: shooting part; 109: near-infrared light emitting part; 110: input part; 111: display part; 112: SIM card slot; 113: LED; 114: external connection I/F; 115: switching part; 119; 120: step difference.
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2016/066710WO2017212513A1 (en) | 2016-06-06 | 2016-06-06 | Biometric authentication device |
| Publication Number | Publication Date |
|---|---|
| CN108780563Atrue CN108780563A (en) | 2018-11-09 |
| CN108780563B CN108780563B (en) | 2022-05-10 |
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201680083329.6AActiveCN108780563B (en) | 2016-06-06 | 2016-06-06 | biometric authentication device |
| Country | Link |
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| JP (1) | JP6638067B2 (en) |
| CN (1) | CN108780563B (en) |
| GB (1) | GB2565446B8 (en) |
| WO (1) | WO2017212513A1 (en) |
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| JPWO2017212513A1 (en) | 2019-01-24 |
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| GB2565446B8 (en) | 2021-12-22 |
| CN108780563B (en) | 2022-05-10 |
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