JP2009199392A - Iris authentication method and iris authentication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simply and accurately perform display control of a display screen when an image of an eye is to be positioned in an authenticatable area on the display screen of an apparatus prior to the authentication of an iris. <P>SOLUTION: An individual eye is irradiated with light by an illuminating light source 22a. A photographing part 21 of which the resolution of photography is controlled by a display control part 24 photographs the eye irradiated with light to acquire an image of the eye. A display part 25 displays the acquired eye image on the display screen. An eye image judgment part 28 judges whether the eye image exists in a specified range of a display area set on the display screen or not. The display control part 24 increases the resolution of the photographing part 21 when the judged result is existence and displays an eye image acquired by the photographing part 21 with the high resolution in the display area. An iris recognition part 26 extracts iris data from the eye image acquired by the photographing part 21 with the high resolution and collates the extracted iris data with previously registered iris data to recognize the eye image. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an iris authentication method and an iris authentication apparatus for authenticating an individual using an iris of an eye, which is a biological feature of an individual such as a person or an animal, and in particular, prior to human authentication, The present invention relates to display control of a display when aligning an image (that is, an eye image) with an authenticable area of a display screen (hereinafter referred to as “display”) of the apparatus.

  Conventionally, as described in, for example, the following documents, an iris authentication device using an image of an iris portion of an eye is known.

Japanese Patent No. 3307936

  As described in Patent Document 1 and the like, a conventional iris authentication device acquires an eye image in a user's living body with a camera, cuts out an iris portion from the acquired eye image, and extracts iris data. When the user's iris data registered in advance is matched, the user is authenticated.

  The function of the iris authentication device is mounted on a personal computer (hereinafter referred to as “PC”), and the user's eyes are illuminated by a camera and a light source attached outside the PC, and the eyes are photographed. A PC-type iris authentication device that performs iris authentication is also known.

  FIG. 8 is a schematic configuration diagram showing a conventional PC type iris authentication apparatus provided with an external camera and a light source for illumination.

  The PC-type iris authentication apparatus 10 includes a photographing unit 11 having a camera 11a, an illuminating unit 12 having an illumination light source 12a, an input unit 13, a display control unit 14, and a display 15a for confirming an image of the photographing unit 11. An iris recognition unit 16 that extracts and authenticates iris data based on a captured eye image, an iris recognition dictionary 17, and the like. The input unit 13 includes a keyboard including an authentication start key (not shown) that is pressed when the eye image displayed on the display 15a is confirmed and it is determined that authentication is possible. The display control unit 14 has a function of controlling screen display on the display unit 15.

  FIGS. 9A and 9B are schematic diagrams showing the arrangement of the camera and illumination light source in the display portion and the screen display at the time of photographing the eyes in the PC-type iris authentication apparatus of FIG.

  A camera 11a composed of a lens, a shutter, and the like is mounted on an upper portion of the display 15a connected to the PC main body, and an illumination light source 12a is attached in the vicinity of the camera 11a. The camera 11a is attached so that the face and eyes 18 of the user sitting facing the display 15a can be photographed. The illumination light source 12a emits light to irradiate the eye 18 when acquiring an image of the user's eye 18, and the eye 18 is photographed by operating the shutter of the camera 11a in synchronization with the light emission. . The user uses an iris authentication function provided by software or the like installed in the PC main body via the display 15a.

The operation of the iris authentication device 10 configured as described above will be described.
When photographing the eye 18, the user sits facing the photographing unit 11, the illumination unit 12, and the display unit 15, and turns his / her face and eyes 18 toward the camera 11 a of the photographing unit 11. At this time, an authenticable display area AR1 is set on the display 15a. An image photographed by the camera 11a of the photographing unit 11 is displayed in the display area AR1, and the user himself / herself can sequentially confirm the images photographed by the camera 11a of the photographing unit 11. In conjunction with the operation of the user directing the face and eyes 18 toward the camera 11a of the photographing unit 11, the image of the eyes 18 gradually appears in the display area AR1, for example, in the X direction indicated by the arrow as shown in FIG. 9 is displayed, following the user's positioning operation, the entire image of the eye 18 as shown in FIG. 9 (b) is maintained in the same size as in FIG. 9 (a). It enters the range of the display area AR1.

  When the entire eye 18 is displayed in the display area AR1, the user determines that the positioning of the eye 18 has been completed, and presses an authentication start key (not shown) of the input unit 13. In starting the process, the recognition process may be automatically started by image processing.

  Accordingly, the display control unit 14 sends the eye image data to the iris recognition unit 16. The iris recognition unit 16 calculates iris data from the eye image, compares the calculated iris data with the iris data stored in the iris recognition dictionary 17, and the rate at which the iris data matches is greater than a certain threshold. If it is, the user is recognized as the person.

  However, the conventional iris authentication device 10 has the following problems (i) to (iii).

  (I) In general, in the iris authentication process, since a detailed image of the iris and pupil is required, the high-resolution camera 11a is used, and a high-resolution eye image is also required in terms of maintaining authentication accuracy. And In the conventional iris authentication apparatus 10, the user displays a high-resolution image required for authentication in the display area AR1 from the initial stage of the operation of positioning the eye 18 in the display area AR1. Therefore, when an area other than the eyes 18 on the face (cheek, forehead, etc.) is displayed because the user is unfamiliar with the alignment of the eyes 18, the position is displayed in close-up. In some cases, the user cannot grasp the position of the eye 18 and the alignment becomes difficult.

  (Ii) As in (i) above, since the image drawing speed is reduced by displaying the display area AR1 at a high resolution from the beginning of the processing, the user can change the position of the eye 18 in the display area AR1. Even if it was grasped, it took time to correct the position, and the user's face moved and shifted, making it difficult to achieve smooth alignment. That is, even if the user moves the eye 18 in an appropriate direction, the followability of the display is poor, and the phenomenon that the user has gone too far and cannot be positioned at the correct position frequently occurs.

  (Iii) Since the high-resolution eye image is displayed as it is, for example, there is a security problem that a malicious person can sneak the eye image with another camera and misuse it. In addition, there are some users who feel disgusted because the details of the eyes 18 are vividly enlarged, and there is a bad usability.

  In the iris authentication method according to the first aspect of the present invention, an illumination process for irradiating light to an individual's eyes and an imaging unit whose imaging resolution is controlled by a control unit is used to photograph the eye irradiated with the light. Image acquisition processing for acquiring an eye image, display processing for displaying the acquired eye image on a display, and whether or not the eye image exists within a specified range of a display area set on the display When the determination result is “present”, the control means increases the resolution of the imaging means and displays the image of the eye acquired by the high-resolution imaging means. A control process to be displayed in the region, and iris data is extracted from the eye image acquired by the high-resolution imaging means, and the extracted iris data is compared with previously registered iris data to match the eye And having a recognizing process image.

  The iris authentication device according to the second to fourth aspects of the present invention includes an illuminating unit that irradiates light to an individual's eyes, and a photographing resolution that is variable. Based on the variable resolution, the eye that is irradiated with the light is photographed. And a display unit for displaying the acquired eye image on the display, and a display unit for displaying the acquired eye image on the display. Determining means for determining whether or not the eye image is present in the image; and when the determination result is “present”, the resolution of the imaging means is increased, and the image acquired by the high-resolution imaging means is acquired. Control means for displaying an eye image in the display area; and iris data is extracted from the eye image acquired by the high-resolution imaging means; the extracted iris data and pre-registered iris data; Match And having a recognition means for recognizing an image of the eye.

  An iris authentication method according to a fifth aspect of the present invention is an iris authentication method in which the eyes irradiated with the light are respectively photographed by illumination processing for irradiating light to an individual's eyes and a plurality of photographing means having different photographing resolutions. Image acquisition processing for acquiring each image, display processing for displaying the acquired eye image on a display, and display of the eye image captured by the low-resolution imaging means set on the display When the determination process for determining whether or not the area exists within the specified range and the determination result is “present”, the control unit switches from the low-resolution imaging unit to the high-resolution imaging unit, and Control processing for displaying the eye image acquired by the high-resolution imaging means in the display area, and extracting iris data from the eye image acquired by the high-resolution imaging means Te and having a recognizing process image of the eye by matching the previously registered iris data with the extracted iris data.

  An iris authentication apparatus according to a sixth aspect of the invention is based on an illumination means for irradiating light to an individual's eyes and a first resolution of photographing, and the first eye of the eye is photographed by photographing the eye irradiated with the light. Based on a first photographing unit that obtains an image and a second resolution that is higher than the first resolution of the photographing, the eye irradiated with the light is photographed to obtain a second image of the eye A display unit configured to display a first image and a second image of the acquired eye on the display; a second imaging unit; a display in which a specified range of the display region is set; and the specified range of the display region Determining means for determining whether or not the first image of the eye is present therein; and when the determination result is “present”, the operation of the first imaging means is stopped and the second imaging means To display the second image of the eye in the display area And means for extracting iris data from the second image of the eye, and recognizing means for recognizing the eye image by comparing the extracted iris data with previously registered iris data. Features.

  The iris authentication method of the invention according to claim 7 is a method of photographing the eye irradiated with light by an illumination process for irradiating light to an individual's eyes and a photographing unit whose photographing resolution is controlled by a control unit. Image acquisition processing for acquiring an eye image, display processing for displaying the acquired eye image on a display, and whether or not the eye image exists within a specified range of a display area set on the display When the determination result is “present” and the determination result is “present”, the control means increases the resolution of the photographing means and an animation indicating that the eyes are properly positioned in the display area From the image of the eye corresponding to the displayed animation data, the control process for displaying the data in the display area, and the high-resolution imaging means. It extracts chroma data, characterized in that a pre-registered iris data with the extracted iris data are collated and a recognizing process image of the eye.

  An iris authentication device according to an eighth aspect of the present invention is directed to an illumination unit that irradiates light to an individual's eyes, and a photographing resolution that is variable, and based on the variable resolution, images the eyes that are irradiated with the light. A photographing unit for acquiring the eye image; a display in which a designated range of a display area is set; a display unit for displaying the acquired eye image on the display; and a designated range of the display area. A determination unit that determines whether or not the eye image exists, a storage unit that stores animation data indicating that the eye image is properly positioned in the display area, and the determination result is “ When there is, the control means for increasing the resolution of the photographing means and displaying the animation data in the display area, and the image of the eye corresponding to the animation data Et al, extracts iris data and having a recognition means for recognizing an image of the eye by matching the previously registered iris data with the extracted iris data.

  The iris authentication method of the invention according to claim 9 is characterized in that an image acquisition process for acquiring an image of the eye by irradiating light to an individual's eyes and capturing the eye by an imaging unit, and a display resolution by the control unit. Display processing for displaying the acquired eye image on a display by a controlled display means, and determining whether or not the eye image exists within a designated range of a display area set on the display When the determination result is “present”, the control means increases the resolution of the display means and causes the eye image to be displayed in the display area. And a recognition process for recognizing the eye image by extracting the iris data and comparing the extracted iris data with previously registered iris data.

  An iris authentication apparatus according to any one of claims 10 to 12, an illumination unit that irradiates light to an individual's eyes, an imaging unit that captures the eye irradiated with the light and acquires the image of the eye, and a display region The display range is set, the display resolution is variable, the display means for displaying the acquired eye image on the display based on the variable resolution, and the display area specification range Determining means for determining whether or not the eye image exists within the display area; and when the determination result is “present”, the resolution of the display means is increased to display the determined eye image in the display area Control means for displaying in the image; and recognition means for extracting iris data from the determined eye image and recognizing the eye image by comparing the extracted iris data with previously registered iris data. Having And butterflies.

  An iris authentication method according to a thirteenth aspect of the invention is an image acquisition process for acquiring an image of an eye by irradiating light to an individual's eye and capturing the eye with an imaging unit, and a display unit having a display resolution. Display processing for displaying the acquired eye image on a display by a controlled display means, and determining whether or not the eye image exists within a designated range of a display area set on the display When the determination process and the determination result are “present”, the control means increases the resolution of the display means, and animation data indicating that the eyes are properly positioned in the display area, Control processing to be displayed in the display area, and iris data is extracted from the eye image corresponding to the animation data, and the extracted iris data is registered in advance. And having a iris data and recognizing processed image of the eye by matching.

  An iris authentication apparatus according to a fourteenth aspect of the invention is an illumination unit that irradiates light to an individual's eyes, an imaging unit that captures the eye irradiated with the light and acquires the image of the eye, and designation of a display area A display having a set range, the display resolution is variable, and based on the variable resolution, display means for displaying the acquired image of the eye on the display, and within a specified range of the display area A determination unit that determines whether or not the eye image exists, a storage unit that stores animation data indicating that the eye image is properly positioned in the display area, and the determination result is “ If there is, the control means for increasing the resolution of the display means and displaying the animation data in the display area, and the eye image corresponding to the animation data. From characterized by having a recognition means for recognizing an image of the eye by collating the extracted iris data previously registered iris data with the extracted iris data.

  According to the first to third aspects of the present invention, for example, a low-resolution image is displayed in the display area of the display at the initial stage of the authentication process, and a high-resolution image is displayed only at the eye display stage. As a result, the drawing speed of the image as a whole is increased, thereby improving the follow-up performance of the display when the user moves the eyes, and the image can be smoothly positioned at the correct position.

  According to the invention of claim 4, since the setting of the resolution of the photographing means is set up stepwise according to the determination result of the determination means, the image is drawn and displayed in the display area. When the amount of movement is large relative to the target positioning area on the display, the resolution can be set according to the width of the movement. Thereby, the drawing on the display more smoothly follows the operation of the user, and the image display becomes clearer.

  According to the fifth and sixth aspects of the invention, at the initial stage of processing in the display area of the display, for example, using a low-resolution photographing means, the user is guided to the designated area to display the eye. At this stage, for example, a high-resolution image of the photographing means is displayed. As a result, a simple photographing means having no mechanism for adjusting the resolution can be introduced to obtain the same effect as in the first aspect, and the cost of the entire apparatus can be reduced.

  According to the inventions according to claims 7 and 8, for example, the security problem that the biometric information generated when the high-resolution eye image is displayed as it is is solved, and the user's eye image remains as it is. The disgust felt by the user due to the display can be reduced.

  According to the invention concerning Claims 9-14, the effect similar to the invention concerning Claims 1-3, 5, 6, 7, 8 can be acquired for a user. On the other hand, since the resolution at the time of shooting is constant in terms of the system, the shooting speed is slightly slower than that of the inventions according to claims 1 to 3, 5, 6, 7, and 8, but the shooting speed is slightly slower. In general, the resolution can be constituted by an inexpensive photographing means, and the cost can be reduced because there is no complicated control.

  The best mode for carrying out the invention will become apparent from the following description of the preferred embodiments when read in conjunction with the accompanying drawings. However, the drawings are only for explanation and do not limit the scope of the present invention.

(Configuration of Example 1)
FIG. 1 is a schematic configuration diagram illustrating an iris authentication apparatus according to Embodiment 1 of the present invention.
The iris authentication device 20 is composed of, for example, a PC, a processor other than a PC, or a dedicated device, and has an imaging unit (for example, an imaging unit) 21 that performs image acquisition processing. The photographing unit 21 includes a camera 21a composed of a lens, a shutter, and the like. The photographing resolution has a variable configuration (for example, a configuration in which a high and low resolution mode can be set), and the set low resolution mode. Or based on the resolution of the high resolution mode, it has a function of photographing the eye and acquiring the eye image. The photographing unit 21 is connected to an illumination unit (for example, an illumination unit) 22 that performs an illumination process, an input unit 23, and a control unit (for example, a display control unit) 24 that performs a control process. Display means (for example, a display unit) 25 for performing display processing is connected.

  The illumination unit 22 includes an illumination light source 22a formed of a lamp or the like, and emits light to irradiate the eyes when acquiring a user's eye image. The camera 21a is synchronized with the light emission. The eye is photographed by operating the shutter. The input unit 23 includes a keyboard including an authentication start key (not shown) that is pressed when it is determined that authentication is possible. The display control unit 24 has a function of controlling the screen display of the display unit 25. The display unit 25 includes a display 25a in which the designated range AR2 of the display area AR1 that can be authenticated is set in order to confirm the eye image acquired by the imaging unit 21, and the eye image acquired by the imaging unit 21 is displayed. It has a function of displaying on the display 25a.

  A recognition unit (for example, an iris recognition unit) 26 that performs a recognition process is connected to the photographing unit 21, and an iris recognition dictionary 27 in which iris data is registered in advance is connected to the iris recognition unit 26. The iris recognition unit 26 extracts iris data from the eye image acquired at the resolution of the high resolution mode in the photographing unit 21, and compares the extracted iris data with the iris data registered in the iris recognition dictionary 27. It has a function of recognizing eye images.

  Further, a determination unit (for example, an eye image determination unit) 28 that performs a determination process is connected to the photographing unit 21, and a display control unit 24 is connected to the eye image determination unit 28. The eye image determination unit 28 has a function of determining whether or not an eye image exists within the designated range AR2 of the display area AR1 on the display 25a. Based on this function, the display control unit 24 controls the screen display of the display unit 25, and when the determination result is “present”, the resolution of the photographing unit 21 is increased (for example, from the low resolution mode to the high resolution mode). And the eye image acquired by the high-resolution imaging unit 21 is displayed in the display area AR1.

  Each component necessary for such an iris authentication function is configured by software incorporated in the PC main body or the like, or an individual circuit.

  FIGS. 2A and 2B are schematic diagrams showing the arrangement of the camera and illumination light source in the display part and the screen display at the time of photographing the eye in the iris authentication apparatus of FIG. 1. The figure which shows the initial display (face or eye periphery) of eye alignment, and the figure (b) are figures which show the display of the eye image at the time of completion of eye alignment.

  A camera 21a is mounted on the upper portion of the display 25a, and an illumination light source 22a is attached in the vicinity of the camera 21a. The camera 21a is attached at a position where the face 19 and eyes 18 of the user sitting facing the display 25a can be photographed. The user uses, for example, an iris authentication function provided from software or the like installed in the PC body via the display on the display 25a.

(Iris Authentication Method of Example 1)
In the first embodiment, when the user shoots the eye 18 toward the camera 21a, the whole or part of the low-resolution face 19 is displayed at the initial stage, and the eye 18 is enlarged. Sometimes a high resolution image of the eye 18 is displayed. Hereinafter, the iris authentication method will be described.

  When photographing the eye 18, the user sits facing the display 25 a and directs his / her face toward the camera 21 a of the photographing unit 21. Then, under the control of the display control unit 24, the camera 21a is set to the low resolution mode and activated. Shooting is started by the camera 21a, and a low-resolution image of the camera 21a is displayed in the authenticable display area AR1 as shown in the display 25a of FIG. Since the display at this time has a low resolution, the entire surface or a part of the face 19 is displayed in the display area AR1.

  While photographing with the camera 21a, the eye image determination unit 28 determines whether or not a portion corresponding to the eye 18 is shown in the designated area AR2 in the displayed user image. The designated area AR2 is a portion displayed in the display area AR1 when the camera 21a is photographed in the high resolution mode. As a determination method, a method used in a general face authentication technique or the like can be adopted. For example, there is a determination method in which the layout of each part of the face 19 is image-identified and the region (area) of the eye 18 is specified.

  When the eye image determination unit 28 determines that the eye 18 is present in the designated area AR2, the display control unit 24 switches the camera 21a to the high resolution mode. As a result, as shown in the display 25a of FIG. 2B, a high-resolution image of the eye 18 is enlarged in the display area AR1. The user determines that the positioning of the image of the eye 18 is high resolution and the details thereof are displayed finely, and presses an authentication start key on a keyboard (not shown) of the input unit 23. In response to this pressing, the display control unit 24 sends high-resolution eye image data captured by the imaging unit 21 to the iris recognition unit 26. The iris recognition unit 26 calculates iris data from the eye image, compares the calculated iris data with the iris data stored in the iris recognition dictionary 27, and the rate at which the iris data matches is greater than a certain threshold. In this case, the user is recognized as the user.

(Effect of Example 1)
According to the first embodiment, a low-resolution image is displayed in the display area AR1 of the display 25a at the initial stage of the authentication process, and a high-resolution image is displayed only at the stage of the eye 18 display. The drawing speed as a whole of the image is increased. Thereby, the followability of the display when the user moves the eye 18 is improved, and the user can be smoothly positioned at the correct position.

(Configuration of Example 2)
FIGS. 3A and 3B are diagrams illustrating resolution settings that increase stepwise in accordance with the output of the eye presence probability in the eye image determination unit of the iris authentication apparatus according to the second embodiment of the present invention.

  The iris authentication device 20 of the second embodiment is different from that of the first embodiment in the function of the display control unit 24 in FIG. In the display control unit 24 of the second embodiment, when the determination result in the eye image determination unit 28 for determining whether or not an eye image exists in the designated area AR2 of the display area AR1 is “present”, The resolution of the photographing unit 21 is increased in accordance with the amount of deviation between the position 18 and the appropriate position in the display region AR1, and the eye image acquired by the photographing unit 21 with this high resolution is displayed in the display region AR1. It has a function to display.

  That is, in the iris authentication device 20 of the second embodiment, the resolution of the camera 21a is set in a stepwise manner according to the determination result in the eye image determination unit 28 under the control of the display control unit 24. An image is drawn and displayed in the display area AR1. Other configurations are the same as those of the first embodiment.

(Iris Authentication Method of Example 2)
The user faces the display 25a and shooting is started by the camera 21a. The resolution of the camera 21a is initially set to a predetermined resolution (for example, the initial setting value is set to a relatively low resolution). An image with the default resolution is displayed in the display area AR1 of the display 25a. In this case, the entire face 19 or a part of the face 19 is displayed in the display area AR1. The eye image determination unit 28 determines whether or not a portion corresponding to the eye 18 is shown in the designated area AR2 in the displayed user image.

  The determination result in the eye image determination unit 28 is output stepwise as the existence probability of the eye 18 in the designated area AR2. For example, even when a part of the face 19 in the display area AR1 is displayed and the face image is analyzed and it is determined that the eye 18 exists, the position of the eye 18 in the display area AR1 is appropriate. In the case where the eye 18 is not in the correct position, there is a possibility that the eye 18 exists and is in the proper position by taking into consideration the distance that the display position of the position of the eye 18 is deviated from the proper position to be aligned. Are determined to be 30%, 40%, 80%, and the like. The determination value is set as the presence probability of the eye 18, and the display control unit 24 controls to raise the resolution of the camera 21a step by step as shown in FIG. The raising ratio does not necessarily have to be linear as shown in FIG. 3A, and as shown in FIG. 3B, the display controller 24 increases the raising width in an area where the presence probability of the eye 18 is high. You may control to set small.

  By controlling in this way, even if it is determined that the eye 18 is present in the display area AR1, if there is an appropriate position and deviation, the setting is changed to a lower resolution according to the amount of deviation. . As the grazing amount decreases, the resolution gradually increases because the appropriate position is approached.

  Finally, if the eye image determination unit 28 determines that the eye 18 is present at an appropriate position in the designated area AR2, the display control unit 24 sets the resolution of the camera 21a to a level required for authentication. As a result, the high-resolution image of the eye 18 is enlarged in the display area AR1. The user determines that the positioning of the image of the eye 18 is high resolution and the details thereof are displayed finely, and presses an authentication start key on a keyboard (not shown) of the input unit 23. Upon receiving the press, the display control unit 24 sends the high-resolution eye image data captured by the imaging unit 21 to the iris recognition unit 26. The iris recognition unit 26 calculates iris data from the eye image, compares the iris data with the iris data stored in the iris recognition dictionary 27, and the iris data matching rate is equal to or greater than a certain threshold. , Recognize the user as the person.

(Effect of Example 2)
According to the second embodiment, the resolution setting of the camera 21a is set in a stepwise manner according to the determination result in the eye image determination unit 28, and the image is drawn and displayed in the display area AR1. Therefore, when the movement amount is large with respect to the target positioning area on the display 25a, the resolution can be set in accordance with the movement width. As a result, the drawing on the display 25a more smoothly follows the operation of the user, and the image display becomes clearer.

(Configuration of Example 3)
FIGS. 4A and 4B are schematic diagrams showing the arrangement of the camera and the illumination light source in the display portion and the screen display at the time of photographing the eyes in the iris authentication apparatus according to the third embodiment of the present invention. (A) is a figure which shows the initial display (face or eye periphery) of eye alignment, and the figure (b) is a figure which shows the display of the eye image at the time of completion of eye alignment. FIG. 4 is a diagram corresponding to FIG. 2 showing the first embodiment. Elements common to those in FIG. 2 are denoted by common reference numerals.

  The basic configuration of the iris authentication apparatus of the third embodiment is the same as that of the iris authentication apparatus 20 of FIGS. 1 and 2 showing the first embodiment, but differs in the following points.

  In the third embodiment, in place of the one camera 21a in the first embodiment, a plurality of cameras (for example, the first camera 21a-1 having a low resolution and the second camera 21a-2 having a high resolution are 2). (Camera) is provided in the photographing unit 21. The first and second cameras 21a-1 and 21a-2 are arranged close to each other at the upper portion of the display 25a, and are attached at positions where the user's face 19 and eyes 18 sitting facing the display 25a can be photographed. It has been. Further, an illumination light source 22a is attached in the vicinity of the first and second cameras 21a-1 and 21a-2 above the display 25a.

  Here, the first camera 21a-1 and the photographing unit 21 constitute a first photographing means, and the second camera 21a-2 and the photographing part 21 constitute a second photographing means. The first imaging unit has a function of acquiring the first image of the eye 18 by imaging the eye 18 irradiated with light based on the first resolution of the low resolution, and the second imaging unit Based on the second resolution higher than the first resolution, the eye 18 irradiated with light is photographed and a second image of the eye 18 is obtained.

  The eye image determination unit 28, which is a determination unit, determines whether or not the first image of the eye 18 exists within the designated range AR2 of the display area AR1 that can be authenticated on the display 25a, as in the first embodiment. However, unlike the first embodiment, the display control unit 24, which is a control unit, stops the shooting operation of the first camera 21a-1 and the second camera when the determination result is “present”. The camera 21a-2 is activated to display the second image of the eye 18 in the display area AR1. Further, the iris recognition unit 26 as a recognition unit extracts iris data from the second image of the eye 18 as in the first embodiment, and the extracted iris data and the iris registered in the iris recognition dictionary 27 in advance. It has a function of recognizing the image of the eye 18 by collating with the data. Other configurations are the same as those of the first embodiment.

  As described above, in the third embodiment, instead of the one camera 21a in the first embodiment, two first and second cameras 21a-1 and 21a-2 are used, and the first camera 21a is used. -1 is a low-resolution camera, and the second camera 21a-2 is a high-resolution camera, which are attached to the photographing unit 21 and photographed by the low-resolution first camera 21a-1 at the initial stage of user operation. When the first image is displayed and guided, and it is determined that the eye 18 is present in the designated area AR2 in the first image, the low-resolution first camera 21a-1 is stopped, and the high-resolution image is displayed. The second image of the eye 18 is photographed by switching to photographing with the second camera 21a-2, and is displayed on the display 25a.

(Iris Authentication Method of Example 3)
When photographing the eye 18, the user sits facing the display 25 a and turns his / her face toward the photographing unit 21. Since the cameras 21 a-1 and 21 a-2 are attached to positions that are substantially adjacent to each other, it is possible to photograph the same positions of the user's face 19 and eyes 18 at the same time.

  First, the display control unit 24 activates the low-resolution camera 21a-1 in the photographing unit 21, and the camera 21a-1 starts photographing. As shown in FIG. 4A, the low resolution image of the camera 21a-1 is displayed in the display area AR1 of the display 25a. Since the display at this time has a low resolution, the front surface or a part of the face 19 is displayed in the display area AR1. Then, as in the first embodiment, the eye image determination unit 28 determines whether or not the eye 18 is included in the designated area AR2.

  When it is determined that the eye 18 is present in the designated area AR2, the display control unit 24 stops shooting the low-resolution camera 21a-1 and activates the high-resolution camera 21a-2. As a result, photographing is started by the camera 21a-2, and as shown in FIG. 4B, the high-resolution eye 18 is enlarged in the display area AR1. The user presses an authentication start key on a keyboard (not shown) of the input unit 23 because the image of the eye 18 has a high resolution and the details are displayed finely to determine that the positioning has been completed. Thereby, the display control unit 24 sends the high-resolution eye image captured by the imaging unit 21 to the iris recognition unit 26, and thereafter performs the authentication process in the same manner as in the first embodiment.

(Effect of Example 3)
According to the third embodiment, at the initial stage of processing in the display area AR1 of the display 25a, the low resolution camera 21a-1 is used to guide the eye 18 into the designated area AR1 to the user. The high-resolution image of the camera 21a-2 is displayed at the stage of display. As a result, it is possible to introduce simple cameras 21a-1 and 21a-2 that do not have a mechanism for adjusting the resolution, and to obtain the same effects as in the first embodiment, including the cameras 21a-1 and 21a-2. The cost of the iris authentication device 20 can be reduced.

(Configuration of Example 4)
FIG. 5 is a schematic configuration diagram illustrating an iris authentication apparatus according to the fourth embodiment of the present invention. Elements common to the elements in FIG. 1 illustrating the first embodiment are denoted by common reference numerals.

  FIGS. 6A and 6B are schematic diagrams showing the arrangement of the camera and illumination light source in the display portion and the display of animation during photographing of the eyes in the iris authentication apparatus of FIG. FIG. 6A is a diagram showing an initial display of eye alignment (a face or an eye periphery), and FIG. 5B is a diagram showing an animation display when the eye alignment is completed. FIG. 6 corresponds to FIG. 2 of the first embodiment.

  The basic configuration of the iris authentication apparatus 20A of the fourth embodiment is the same as that of the iris authentication apparatus 20 of FIGS. 1 and 2 showing the first embodiment, but differs in the following points.

  In the iris authentication apparatus 20A of the fourth embodiment, storage means (for example, an animation data storage section) 29 that stores newly added animation data in the eye image determination section 28 and the display section 25 of the first embodiment. Is connected. The animation data storage unit 29 stores animation data indicating that the image of the eye 18 is properly positioned in the display area AR1 of the display 25a. Unlike the first embodiment, the display control unit 24 serving as a control unit has a determination result of the eye image determination unit 28 that determines whether or not an image of the eye 18 exists in the designated area AR2 of the display area AR1. ", The function of increasing the resolution of the photographing unit 21 and displaying animation data in the display area AR1 is provided. Further, the iris recognition unit 26 as a recognition unit extracts iris data from the image of the eye 18 corresponding to the animation data, and in the extracted iris data and iris recognition dictionary 27, as in the first embodiment. It has a function of recognizing an image of the eye 18 by collating with previously registered iris data.

  As described above, in the fourth embodiment, in the process of displaying the high-resolution eye image in the first embodiment, an actual user's eye 18 image is not displayed, but an animation display is performed instead. It has become. Other configurations are the same as those of the first embodiment.

(Iris Authentication Method of Example 4)
When photographing the eye 18, the user sits facing the display 25 a and directs his / her face toward the camera 21 a of the photographing unit 21. First, the display control unit 24 sets the camera 21a to the low resolution mode and starts it. Shooting is started by the camera 21a, and as shown in FIG. 6A, a low-resolution image of the camera 21a is displayed in the display area AR1. Since the display at this time has a low resolution, the entire surface or a part of the face 19 is displayed in the display area AR1. Then, the eye image determination unit 28 determines whether or not the eye 18 exists in the image of the designated area AR2 as in the first embodiment.

  When it is determined that the eye 18 exists in the designated area AR2, the display control unit 24 switches the camera 21a to the high resolution mode. As a result, a high-resolution image of the eye 18 is taken by the camera 21a.

  In the fourth embodiment, the high-resolution image of the eye 18 is captured, but the image is not displayed on the display 25 a of the display unit 25. Instead, as shown in FIG. 6B, the display control unit 24 reads the animation data from the animation data storage unit 29 and displays it in the display area AR1 of the display 25a. The animation may be displayed at the position where the actually photographed eye 18 is located.

  The content expressed by animation is preferably a picture that is a close-up of a large eye 18, but an abstract illustration (such as a symbol) to the extent that the user can guess that the eye 18 has been positioned. ).

  The user determines that the positioning is completed by displaying an animation on the display 25a, and presses an authentication start key on a keyboard (not shown) of the input unit 23. Upon receiving this press, the display control unit 24 sends the eye image data to the iris recognition unit 26. The iris recognition unit 26 calculates iris data from the high-resolution eye image, compares the calculated iris data with the iris data stored in the iris recognition dictionary 27, and has a matching rate of the iris data. If the threshold is exceeded, the user is recognized as the user.

(Modification of Example 4)
The fourth embodiment may be modified as the following (1) to (3).

  (1) A combination of Example 3 and Example 4 is used to shoot with a plurality of (for example, two) cameras 21a-1 and 21a-2, and when shooting with a high-resolution camera 21a-2, An animation may be displayed on the display 25a.

  (2) Combining the second embodiment and the fourth embodiment, when the eye 18 exceeds a certain resolution or existence probability, the display is switched to the animation display assuming that the eye 18 is positioned normally. It may be.

  (3) Simultaneously with the display of the animation, various supplementary messages may be sent to the user by voice, images, characters, or the like.

(Effect of Example 4)
According to the fourth embodiment, the security problem that the biological information generated when the high-resolution eye image is displayed as it is is solved, and the image of the user's eye 18 is displayed as it is. The disgust felt by the user can be reduced.

(Configuration of Example 5)
FIGS. 7A and 7B are schematic configuration diagrams showing an iris authentication apparatus according to the fifth embodiment of the present invention. FIG. 7A is a schematic diagram of an iris authentication apparatus corresponding to the first and second embodiments. FIG. 6B and FIG. 6B are schematic configuration diagrams of an iris authentication apparatus corresponding to the fourth embodiment.

  In the fifth embodiment, in the first, second, and fourth embodiments, the resolution of the camera 21a is fixed and the display resolution is controlled. That is, the components of the fifth embodiment are substantially the same as those of the first, second, and fourth embodiments, but the control method is different from that of the first, second, and fourth embodiments. In the first, second, and fourth embodiments, the resolution of the camera 21a in the photographing unit 21 is controlled based on the determination result of the eye image determination unit 28. However, in the fifth embodiment, the image display method is controlled. Hereinafter, the configuration of the fifth embodiment will be described in detail.

  The iris authentication apparatus 20 shown in FIG. 7A of the fifth embodiment corresponds to the first and second embodiments, and the imaging unit 21, the illumination unit 22, and the iris recognition unit similar to the first and second embodiments. 26, an iris recognition dictionary 27 and an eye image determination unit 28, and a control unit (for example, a display control unit) 24 and a display unit (for example, a display unit) 25 having functions different from those of the first and second embodiments. .

  The display unit 25 includes a display 25a in which a designated range AR2 of the display area AR1 is set. The display resolution is changed by the display control unit 24. Based on the changed resolution, the eye acquired by the photographing unit 21 is displayed. It has a function of displaying 18 images on the display 25a. The display control unit 24 increases the resolution of the display unit 25 when the determination result of the eye image determination unit 28 that determines whether or not the image of the eye 18 exists within the specified range AR2 of the display area AR1 is “present”. Thus, the image of the determined eye 18 is displayed in the display area AR1.

  Here, corresponding to the first embodiment, for example, the display unit 25 is set by switching the display resolution to the low resolution mode or the high resolution mode, and based on the set resolution of the low resolution mode or the high resolution mode. The image of the eye 18 acquired by the photographing unit 21 is displayed on the display 25a. Furthermore, when the determination result of the eye image determination unit 28 is “present”, the display control unit 24 switches the resolution of the display unit 25 from the low resolution mode to the high resolution mode and displays an image including the determined eye 18. It has a function of displaying in the display area AR1.

  In correspondence with the second embodiment, for example, when the determination result of the eye image determination unit 28 is “present”, the display control unit 24 shifts the shift between the position of the eye 18 and the appropriate position in the display area AR1. Depending on the amount, the resolution of the display unit 25 may be increased, and an image including the determined eye 18 may be displayed in the display area AR1.

  An iris authentication apparatus 20A shown in FIG. 7B of the fifth embodiment corresponds to the fourth embodiment, and the imaging unit 21, the illumination unit 22, the iris recognition unit 26, and the iris recognition similar to the fourth embodiment. The dictionary 27, the eye image determination unit 28, the animation data storage unit 29, and a control unit (for example, a display control unit) 24 and a display unit (for example, a display unit) 25 having functions different from those of the fourth embodiment are included. .

  The display unit 25 includes a display 25a in which a designated range AR2 of the display area AR1 is set. The display resolution is changed by the display control unit 24. Based on the changed resolution, the eye acquired by the photographing unit 21 is displayed. It has a function of displaying 18 images on the display 25a. Further, when the determination result of the eye image determination unit 28 that determines whether or not the image of the eye 18 exists within the designated range AR2 of the display area AR1 is “present”, the display control unit 24 determines the resolution of the display unit 25. And a function of displaying animation data in the display area AR1.

(Iris Authentication Method of Example 5)
For example, an iris authentication method in the iris authentication apparatus 20 in FIG. 7A of the fifth embodiment corresponding to the second embodiment will be described.

  In the second embodiment, the user is photographed, the eye image determination unit 28 determines the possibility of being in an appropriate position, and the resolution of the camera 21a is controlled based on the result. On the other hand, in the iris authentication apparatus 20 of FIG. 7A according to the fifth embodiment, when the user is photographed, the resolution is fixed (for example, high resolution), and photographing with the camera 21a and eye image determination are performed. Eye image determination by the unit 28 is performed. Processing from shooting to eye image determination is almost the same as in the second embodiment.

  In the fifth embodiment, the display resolution is controlled based on the eye image determination result. That is, when the presence probability of the eye 18 is low, the display resolution is reduced (that is, a wide range is displayed), and when the presence probability of the eye 18 is high, the display resolution is increased (that is, a narrow range is displayed). ) As a result, even if it is determined that the eye 18 is present in the display area AR1, if there is a deviation from an appropriate position, a lower resolution is displayed in accordance with the amount of the deviation, and the deviation becomes smaller. When approaching the proper position, an image with gradually higher resolution is displayed.

  Finally, when the eye image determination unit 28 determines that the eye 18 is present at an appropriate position in the designated area AR2, the high-resolution image of the eye 18 is enlarged in the display area AR1. Therefore, iris recognition processing is performed based on the image.

  Note that such a control method includes the iris authentication apparatus 20 in FIG. 7A corresponding to the first embodiment corresponding to the first embodiment and the iris illustrated in FIG. 7B corresponding to the fourth embodiment. The same applies to the iris authentication method in the authentication device 20A.

(Effect of Example 5)
According to the fifth embodiment, the user can obtain substantially the same effects as the first, second, and fourth embodiments. On the other hand, since the resolution at the time of shooting is constant in terms of the system, the shooting speed is slightly slower because it cannot be adaptively controlled as compared with the first, second, and fourth embodiments. Further, the cost can be reduced because there is no complicated control.

(Other variations of Examples 1 to 5)
For example, the iris authentication devices 20 and 20A may add other functional blocks other than those illustrated in order to improve accuracy and expand applications.

It is a schematic block diagram which shows the iris authentication apparatus which concerns on Example 1 of this invention. It is a schematic diagram which shows the screen display at the time of imaging | photography of arrangement | positioning of the camera and illumination light source of the display part in the iris authentication apparatus of FIG. It is a figure which shows the resolution setting which increases in steps according to the output of the presence probability of the eye in the eye image determination part of the iris authentication apparatus which concerns on Example 2 of this invention. It is a schematic diagram which shows the screen display at the time of imaging | photography of arrangement | positioning of the camera and illumination light source of a display part in the iris authentication apparatus of Example 3 of this invention, and eyes. It is a schematic block diagram which shows the iris authentication apparatus which concerns on Example 4 of this invention. It is a schematic diagram which shows the display of the animation at the time of imaging | photography of the arrangement | positioning of the camera and illumination light source of a display part in the iris authentication apparatus of FIG. It is a schematic block diagram which shows the iris authentication apparatus which concerns on Example 5 of this invention. It is a schematic block diagram which shows the conventional PC type | mold iris authentication apparatus provided with the external camera and the light source for illumination. It is a schematic diagram which shows the screen display at the time of imaging | photography of arrangement | positioning of the camera and illumination light source of a display part in the PC type | mold iris authentication apparatus of FIG.

Explanation of symbols

20, 20A Iris authentication device 21 Image capturing unit 21a, 21a-1, 21a-2 Camera 22 Illumination unit 22a Illumination light source 23 Input unit 24 Display control unit 25 Display unit 25a Display 26 Iris recognition unit 27 Iris recognition dictionary 28 Eye image determination 29 animation data storage

Claims (14)

A lighting process that shines light on the eyes of the individual;
An image acquisition process for acquiring an image of the eye by capturing the eye irradiated with the light by an imaging unit in which the resolution of the imaging is controlled by the control unit;
Display processing for displaying the acquired eye image on a display screen;
A determination process for determining whether or not the eye image exists within a specified range of a display area set on the display screen;
A control process in which when the determination result is “present”, the control unit increases the resolution of the imaging unit and displays the image of the eye acquired by the high-resolution imaging unit in the display area; ,
A recognition process for recognizing the eye image by extracting iris data from the eye image acquired by the high-resolution imaging means and comparing the extracted iris data with previously registered iris data;
An iris authentication method characterized by comprising: Lighting means for irradiating light to the eyes of the individual;
The photographing resolution is variable, and based on the variable resolution, photographing means for photographing the eye irradiated with the light and acquiring the eye image;
A display unit configured to display a specified range of a display area, and displaying the acquired image of the eye on the display screen;
Determining means for determining whether or not the image of the eye exists within a designated range of the display area;
When the determination result is “present”, the control means for increasing the resolution of the photographing means and displaying the image of the eye acquired by the high-resolution photographing means in the display area;
Recognizing means for extracting iris data from the eye image acquired by the high-resolution imaging means, recognizing the eye image by comparing the extracted iris data with previously registered iris data;
An iris authentication apparatus characterized by comprising: The photographing unit is configured to photograph the eyes irradiated with the light based on the resolution of the low resolution mode or the high resolution mode that is set by switching the resolution of the photographing to the low resolution mode or the high resolution mode. Having a function of acquiring an image of the eye;
When the determination result is “present”, the control unit switches the resolution of the photographing unit from the low resolution mode to the high resolution mode, and the image of the eye acquired by the high resolution photographing unit is The iris authentication apparatus according to claim 2, which has a function of displaying in a display area.   When the determination result is “present”, the control unit increases the resolution of the photographing unit according to the amount of deviation between the eye position and the appropriate position in the display area, and the high resolution. The iris authentication apparatus according to claim 2, wherein the iris authentication apparatus has a function of displaying the image of the eye acquired by the photographing unit in the display area. A lighting process that shines light on the eyes of the individual;
Image acquisition processing for acquiring images of the eyes by respectively capturing the eyes irradiated with the light by a plurality of imaging means having different imaging resolutions;
Display processing for displaying the acquired eye image on a display screen;
A determination process for determining whether or not the image of the eye imaged by the imaging means having a low resolution exists within a designated range of a display area set on the display screen;
When the determination result is “present”, the control unit switches from the low-resolution imaging unit to the high-resolution imaging unit, and the eye image acquired by the high-resolution imaging unit is displayed in the display area. Control processing to be displayed on
A recognition process for recognizing the eye image by extracting iris data from the eye image obtained by the high-resolution imaging means and comparing the extracted iris data with previously registered iris data;
An iris authentication method characterized by comprising: Lighting means for irradiating light to the eyes of the individual;
First imaging means for capturing a first image of the eye by capturing an eye irradiated with the light based on a first resolution of imaging;
Based on a second resolution higher than the first resolution of the photographing, a second photographing means for photographing the eye irradiated with the light and obtaining a second image of the eye;
A display unit configured to display a first image and a second image of the acquired eye on the display screen, the display screen having a specified range of the display area set;
Determination means for determining whether or not the first image of the eye exists within a specified range of the display area;
Control means for stopping the operation of the first photographing means and activating the second photographing means to display the second image of the eye in the display area when the determination result is “present”; ,
Recognizing means for extracting iris data from the second image of the eye, recognizing the eye image by comparing the extracted iris data with previously registered iris data;
An iris authentication apparatus characterized by comprising: A lighting process that shines light on the eyes of the individual;
An image acquisition process for acquiring an image of the eye by capturing the eye irradiated with the light by an imaging unit in which the resolution of the imaging is controlled by the control unit;
Display processing for displaying the acquired eye image on a display screen;
A determination process for determining whether or not the eye image exists within a specified range of a display area set on the display screen;
When the determination result is “present”, the control means increases the resolution of the photographing means, and animation data indicating that the eyes are properly positioned in the display area is displayed in the display area. Control processing to be displayed on
Iris data is extracted from the eye image corresponding to the displayed animation data, which is captured by the high-resolution imaging means, and the extracted iris data is compared with previously registered iris data. A recognition process for recognizing the eye image;
An iris authentication method characterized by comprising: Lighting means for irradiating light to the eyes of the individual;
The photographing resolution is variable, and based on the variable resolution, photographing means for photographing the eye irradiated with the light and acquiring the eye image;
A display unit configured to display a specified range of a display area, and displaying the acquired image of the eye on the display screen;
Determining means for determining whether or not the image of the eye exists within a designated range of the display area;
Storage means for storing animation data indicating that the image of the eye is properly positioned in the display area;
When the determination result is “present”, the control means for increasing the resolution of the photographing means and displaying the animation data in the display area;
Recognition means for recognizing the eye image by extracting iris data from the eye image corresponding to the animation data and comparing the extracted iris data with previously registered iris data;
An iris authentication apparatus characterized by comprising: An image acquisition process for acquiring an image of the eye by irradiating light to the eyes of the individual and photographing the eye with a photographing unit;
Display processing for displaying the acquired image of the eyes on a display screen by display means whose display resolution is controlled by the control means;
A determination process for determining whether or not the eye image exists within a specified range of a display area set on the display screen;
When the determination result is “present”, the control unit increases the resolution of the display unit and displays the eye image in the display area;
A recognition process for recognizing the eye image by extracting iris data from the eye image and comparing the extracted iris data with previously registered iris data;
An iris authentication method characterized by comprising: Lighting means for irradiating light to the eyes of the individual;
Photographing means for photographing the eye irradiated with the light and obtaining an image of the eye;
A display unit having a display screen in which a designated range of a display area is set, a display resolution is variable, and based on the variable resolution, display means for displaying the acquired eye image on the display screen;
Determining means for determining whether or not the image of the eye exists within a designated range of the display area;
When the determination result is “present”, control means for increasing the resolution of the display means and displaying the image of the determined eye in the display area;
Recognition means for extracting iris data from the determined eye image, recognizing the eye image by comparing the extracted iris data with previously registered iris data;
An iris authentication apparatus characterized by comprising: The display means sets the display resolution by switching to a low resolution mode or a high resolution mode, and displays the acquired eye image on the display screen based on the resolution of the set low resolution mode or high resolution mode. Has a function to display
When the determination result is “present”, the control unit switches the resolution of the display unit from the low resolution mode to the high resolution mode, and displays an image including the determined eye in the display area. The iris authentication device according to claim 10, which has a function.   When the determination result is “present”, the control means increases the resolution of the display means according to the amount of deviation between the eye position and the appropriate position in the display area, and determines the determination. The iris authentication apparatus according to claim 10, having a function of displaying an image including an eye in the display area. An image acquisition process for acquiring an image of the eye by irradiating light to the eyes of the individual and photographing the eye with a photographing unit;
Display processing for displaying the acquired image of the eyes on a display screen by display means whose display resolution is controlled by the control means;
A determination process for determining whether or not the eye image exists within a specified range of a display area set on the display screen;
When the determination result is “present”, the control means increases the resolution of the display means, and animation data indicating that the eyes are properly positioned in the display area is displayed in the display area. Control processing to be displayed on
A recognition process for recognizing the eye image by extracting iris data from the eye image corresponding to the animation data and comparing the extracted iris data with previously registered iris data;
An iris authentication method characterized by comprising: Lighting means for irradiating light to the eyes of the individual;
Photographing means for photographing the eye irradiated with the light and obtaining an image of the eye;
A display unit having a display screen in which a designated range of a display area is set, a display resolution is variable, and based on the variable resolution, display means for displaying the acquired eye image on the display screen;
Determining means for determining whether or not the image of the eye exists within a designated range of the display area;
Storage means for storing animation data indicating that the image of the eye is properly positioned in the display area;
When the determination result is “present”, the control means for increasing the resolution of the display means and displaying the animation data in the display area;
Recognizing means for recognizing the eye image by extracting iris data from the eye image corresponding to the animation data and comparing the extracted iris data with previously registered iris data;
An iris authentication apparatus characterized by comprising:

Images