Holographic biometric enrollment station

Abstract

The invention is a biometric enrollment station (1), comprising: - a support (9) of a light image (11), the light image forming a source image (11); - a holographic window (13) configured to project the source image (11), the projected source image forming a hologram (15), the hologram (15) being the result of an orthogonal symmetry of the source image (11) relative to a plane of the window (13); - a sensor (25) of biometric data of a hand (27) of a user (3); the source image (11), the window (13) and the sensor (25) being arranged together so that the hologram (15) defines an optimal position for capturing biometric data, of a hand (27) of a user (3), by the sensor (25). Figure for abstract: Figure 1

Description

Title of the invention: Holographic biometric enrollment station

[0001] The invention relates to a biometric enrollment station. In particular, it relates to a biometric enrollment station allowing the capture of the palmar venous pattern of a hand.

[0002] To perform such biometric enrollment, a user in the enrollment position at the station places the palm of his hand facing a biometric data sensor of the station, the sensor operating by the emission and reception of near infrared, with a view to capturing the venous pattern of the palm of the user's hand. Once the biometric data has been captured, it is recorded and associated with the user in a database.

[0003] Subsequently, the user can proceed with his biometric identification. During the biometric identification process, at a biometric identification station, the user also places the palm of his hand facing a biometric data sensor of the station, in order to capture the vein pattern of the palm of this hand. The captured biometric data is compared to the data recorded in the database during enrollment, in order to identify the user.

[0004] Used for subsequent payment, the user associates their payment device, or a unique identifier linked to this device, with their identity upon enrollment. Then, when making a payment, the user no longer needs to use their payment card or phone to pay, they simply need to expose the palm of their hand to a biometric data sensor and proceed with their biometric identification. Such a project associating the biometric data of the vein pattern of a palm on the one hand, and a payment process on the other hand, is known as "Palm Vein Payment".

[0005] The biometric identification method using the vein pattern is particularly advantageous compared to other biometric identification methods. Indeed, in addition to the biometric data involved making it very secure, it is carried out without contact between the hand and the capture device, which makes it particularly hygienic and therefore advantageous for the user. In addition, the user controls the sharing of his biometric data, since his identification here requires a hand gesture on his part, unlike in particular biometric data based on facial identification, which can be used on people without their knowledge if they are filmed.

[0006] The biometric enrollment process is more tedious than the subsequent identification process. In particular, it is necessary that, during enrollment at the enrollment station, the user's hand is presented in front of the biometric data sensor in an optimal position that is much more precise than during subsequent identification. Thus, during enrollment, the user must be precise and patient, which can generate an uncomfortable experience and limit the adoption of this biometric identification process.

[0007] To overcome this need for precision during enrollment, a biometric enrollment station is already known in the prior art, comprising a guide, the guide taking the form of a support placed in a predetermined position and at a predetermined distance from the biometric data sensor, allowing the user to place his fingers there. In this way, the user is encouraged to expose the palm of his hand at a distance from the sensor which approaches the appropriate position for enrollment.

[0008] However, unlike the identification method mentioned above, this corresponding enrollment method therefore involves contact between the user's hand and the guide. This goes against the "contactless" nature promised by this system and its hygienic advantage, which risks slowing down its adoption.

[0009] Furthermore, in this biometric enrollment station, the biometric data sensor is placed at the bottom of a conduit, under the guide, to face the hand. The processing of the near infrared signals by the sensor to capture the biometric data is then hindered by reflections on the walls of the conduit when the color of these walls is not matte, which imposes an additional design constraint.

[0010] Furthermore, this guide leaves the user a great deal of freedom in positioning. It is therefore not sufficient to ensure optimal positioning for the user. This is why, in addition to this guide, text is displayed on a screen to indicate to the user how to better position his hand if necessary. However, understanding and applying these instructions can also be difficult. Linguistic and iconographic confusions exist, such as confusion between requests to move one's hand "forward" or "upward".

[0011] Finally, the use of the guide involves contact between the hand and the guide, which goes against the “contactless” character.

[0012] The invention aims to simplify and accelerate the biometric enrollment method relating to the capture of biometric data of a hand, such as its palm pattern, by a technique facilitating the enrollment experience by the user, without contact between the hand and a support, and facilitating the capture of data by the biometric data sensor.

[0013] To this end, the invention relates to a biometric enrollment station comprising:

[0014] - a support for a light image, the light image forming a source image;

[0015] - a holographic window configured to project the source image, the source image projected forming a hologram, the hologram being the result of an orthogonal symmetry of the source image with respect to a plane of the glass;

[0016] - a biometric data sensor of a user's hand;

[0017] the source image, the window and the sensor being arranged between them so that the hologram defines an optimal position for capturing biometric data, from a user's hand, by the sensor, the window being inclined relative to the source image, an angle between the source image and the window, considered in the direction of the optical path from the source image to the hologram, being substantially equal to 45°.

[0018] Thus, the hologram, projected into space, allows the user to be shown how to optimally position his hand, which facilitates the capture of data by the sensor. The user does not put his hand in contact with a physical support since he only interacts with the hologram. The absence of a physical guide also makes it possible to circumvent the color constraint on its walls. The enrollment experience is easy and even fun for the user.

[0019] Furthermore, the hologram is also, by orthogonal symmetry, inclined relative to the window, and this at the same angle. This inclination makes it possible to orient the hologram towards the user's eyes while moving the source image away, which makes it possible to distinguish the hologram from the source image by a user located in front of the hologram. In addition, this inclination makes it possible to improve the brightness of the hologram.

[0020] Furthermore, the angle between the source image and the hologram is substantially 90°, so that the user, with his eyes orthogonally facing the hologram, does not see the source image through the glass and therefore only has the hologram in his field of vision, which is comfortable. This is also an angle for which the brightness of the hologram is optimal if the source is not placed far from the glass.

[0021] According to other optional characteristics taken alone or in combination.

[0022] Preferably, the source image and the window are arranged so that a user in the enrollment position cannot see, through the window, the source image.

[0023] Thus, the user in the enrollment position is not hindered by the view of the source image through the window when looking at the hologram. Depending on the user's enrollment position, this result can be achieved by different arrangements involving a predetermined angle between the window and the hologram, for example at least 45°, associated with a predetermined distance between one end of the source image and the window, for example at least 5 centimeters, and associated with an orientation predetermined optimal orientation of the entire glass and source so that the hologram is optimally oriented towards the eyes of an average user placed at a distance from the hologram allowing them to interact with it naturally. Since these parameters depend on each other, several configurations are possible to achieve this result.

[0024] Advantageously, the source image and the hologram extend respectively in first and second intersecting planes in a straight line called an axis so that the source image and the hologram converge towards this axis, the direction of convergence being at least partly opposite to the direction of gravity.

[0025] In other words, the source image and the hologram extend respectively in first and second intersecting planes in a straight line called the axis so that any vector starting from the axis, orthogonal to the axis and extending in the hologram, extends in a direction at least partly opposite to gravity, and any vector starting from the axis, orthogonal to the axis and extending in the source image, extends in a direction at least partly opposite to gravity.

[0026] In other words, the source image and the hologram extend respectively in first and second intersecting planes in a straight line called axis so that the hologram and the source image extend below this axis considering the direction of gravity.

[0027] In other words, the axis is located, at each of its points, above the closest points of the source image and the hologram.

[0028] Thanks to this arrangement, two cumulative effects are generated: the hologram is oriented towards the user and the space located under the hologram is empty, in particular not occupied by the window, given that in this arrangement the window as well as the source image diverge downwards with respect to the hologram. The empty space under the hologram allows an object to be placed if necessary, such as a sensor or means of interaction with the user's hand placed at the level of the hologram. If, conversely, the hologram, the source image and the window converged upwards, the empty space located under the hologram would risk being occupied or hindered by a part of the window.

[0029] Preferably, an angle between the hologram and a horizontal plane considering the direction of gravity, considered in the direction of the optical path from the source image to the hologram, is less than or equal to 25°.

[0030] Thus, this angle allows the user in the enrollment position to place his hand naturally at the level of the hologram by extending into it or over it, in the continuity of a movement of the arm towards the hologram without having to orient his hand at too great an angle at the wrist.

[0031] Advantageously, the biometric data sensor is positioned below the hologram, considering the direction of gravity, the sensor extending substantially parallel to a plane in which the hologram extends.

[0032] Thus, the sensor is positioned facing and parallel to the hand of the user who is placed in or on the hologram. The positioning of the sensor with respect to the hand is therefore optimal for capturing biometric data. In addition, this sensor does not interfere with the projection of the hologram by the window.

[0033] Preferably, a plane being intersecting with a segment of one end of the hologram and with a segment of a contour of the biometric data sensor, so that all the other points of the hologram are located in a first half-space on one side of the plane and all the other points of the biometric data sensor are located in a second half-space on the other side of the plane, the plane comprises a straight line which reaches an eye of the user in the enrollment position.

[0034] Thus, any user, whether tall or short, as long as one of their eyes is placed on this line, which is achieved by moving away from or approaching the enrollment station, will be in the optimal enrollment position since they will only have to place their hand naturally in or on the hologram so that it is in the optimal position for capture by the biometric data sensor. A tall user will be placed on the line further away than a short user. This arrangement therefore makes it possible to adapt the station to any user size.

[0035] Advantageously, the hologram comprises a marker for the placement of the user's hand, preferably a marker for the placement of a fingertip, in particular a fingertip located between a ring finger and a middle finger of the hand.

[0036] The term "interfinger" refers to the epidermal contour naturally located between two fingers of a hand. In other words, it is a junction zone between two fingers of a hand, with reference to the hand placed flat, the fingers naturally spaced apart from each other.

[0037] Thanks to this marker, regardless of the size of the user's hand, it will be optimally placed for the capture of biometric data by the biometric data sensor.

[0038] Preferably, the light image support is a computer tablet provided with a screen for displaying the light image.

[0039] Thus, a computer tablet is used to generate the source image. This support makes it easy to change the source image since it is sufficient to control the tablet. The luminous image can also be dynamic. The lighting of the luminous image is also an integral part of the tablet, the assembly therefore taking up little space in the station.

[0040] Alternatively, the light image carrier is a transparent film including the source image, the station further comprising means for projecting light towards the transparent film to make the source image light.

[0041] This arrangement is less expensive and more energy-efficient than using a tablet. On the other hand, the luminous image is necessarily static, less easy to change since it is necessary to change the transparent film to replace it, and the entire transparency and projection means potentially take up more space than a computer tablet.

[0042] Advantageously, the station further comprises an infrared sensor placed substantially in a plane in which the hologram extends and configured to detect interactions between the user's hand and the hologram.

[0043] Thus, the infrared sensor placed in this way makes it possible to capture possible interactions, in particular of the hand, interactions initiated or evoked by the content of the hologram.

[0044] Preferably, the station further comprises interaction means for guiding the user during enrollment.

[0045] Thus, these means can take the form of a terminal and / or a screen guiding the user in their enrollment process, in particular to inform them of the different stages and the validation of the enrollment.

[0046] Advantageously, the biometric data sensor is configured to capture data from the palmar venous pattern of the hand.

[0047] Thus, the sensor sends and receives near infrared signals and is specifically adapted to capture data allowing a user to be subsequently identified via the palm pattern of his hand.

[0048] The invention also provides a method for biometric enrollment of a user, comprising the following steps:

[0049] - the user being in an enrollment position with an enrollment station biometric as described above, projection of the hologram;

[0050] - when the user's hand is positioned in accordance with the defined position by the hologram, captures biometric data of the hand by the biometric data sensor.

[0051] The invention also provides a method for biometric identification of a user with a biometric identification device, in which a biometric enrollment of the user, allowing the biometric identification of this user, has been carried out beforehand in accordance with the biometric enrollment method as described above.

[0052] The invention also provides a payment method, comprising the implementation of the following steps:

[0053] - biometric identification of a physical buyer with a device biometric identification in accordance with the biometric identification process as described above;

[0054] - if the buyer's biometric identification is validated, automatic payment of the buyer.

[0055] The invention also provides a computer program comprising instructions which, when the program is executed by a computer, cause the latter to implement the steps of the biometric enrollment method as described above, of the biometric identification method as described above or of the payment method as described above.

[0056] Also provided according to the invention is a computer-readable recording medium comprising instructions which, when executed by a computer, cause the latter to implement the steps of the biometric enrollment method as described above, of the biometric identification method as described above or of the payment method as described above. Brief description of the figures

[0057] The invention will be better understood on reading the following description given solely by way of example and with reference to the appended drawings in which:

[0058] [Fig-1] is a diagram of a first embodiment of a biometric enrollment station of the invention;

[0059] [Fig.2] is a diagram of a second embodiment of the station;

[0060] [Fig.3] is a diagram of a third embodiment of the station;

[0061] [Fig.4] is a diagram of fourth and fifth embodiments of the station;

[0062] [Fig.5] is a diagram of a hand placement marker;

[0063] [Fig.6] is a flowchart of a biometric enrollment method of the invention;

[0064] [Fig.7] is a flowchart of a biometric identification method of the invention;

[0065] [Fig.8] is a flowchart of a payment method of the invention. Detailed description

[0066] Figures 1 to 4 show a biometric enrollment station according to five embodiments of the invention, [Fig. 5] illustrating two of them. A user 3 enrolls at this station.

[0067] The enrollment station 1 comprises a frame 5, which is provided with housings and / or means for holding in position the various elements of the station described below. The frame comprises a base 7 allowing the station 1 to be stabilized on a horizontal support considering the direction of gravity. This base can be replaced by feet or any other means of stabilizing the station.

[0068] The enrollment station 1 of [Fig. 1] comprises a support 9 of a light image 11, the light image 11 forming a source image 11. The expression “source image” makes it possible to distinguish this image 11 from a hologram 15 introduced below. In this first embodiment, the light image support 9 is a computer tablet 9 provided with a screen for displaying the light image 11.

[0069] The station 1 also comprises a holographic window 13 configured to project the source image 11, the projected source image 11 forming a hologram 15, the hologram 15 being the result of an orthogonal symmetry of the source image 11 with respect to a plane of the window 13. The window 13 is inclined with respect to the source image 11. The content of the hologram 15 is by definition the content of the source image 11.

[0070] The tablet 9 and the window 13 form, with the base 7 and the housings of these elements, an empty closed container forming a black box 17. In particular, the immediate environment of the tablet 9 does not generate any light. The lighting generated by the tablet 9 in the direction of the window 13 is 1000 nits, that is to say 1000 candelas per square meter (cd / m2). In this way, the projection of the hologram 15 on the other side of the window 13 is sufficiently clear and sharp, even in the presence of light on the side of the hologram 15.

[0071] The light image 11 and therefore the hologram 15, which is its projection, include a placement mark 19 for the user's hand illustrated in [Fig.5]. This mark includes the drawing 21 of the silhouette of a medium-sized hand and, between the ring finger and the middle finger of this drawn hand, an indication 23 for the placement of a fingertip via a red circle. This mark 19 allows any user, regardless of the size of their hand, to position the latter correctly, by placing their fingertip at the level of the fingertip 23 of the hologram 15. By "fingertip", we mean the epidermal contour naturally located between two fingers of a hand. In other words, it is a junction zone between two fingers of a hand, with reference to the hand laid flat, the fingers naturally separated from each other.

[0072] The hand placement marker 19 could however be different. The light image 11 could also include an incentive to interact with the hologram 15, for example via the display of a virtual keyboard. It should be noted that, given that the support 9 of the light image is a tablet, the image 11 and therefore the hologram 15 can be dynamic.

[0073] The station 1 is arranged so that the source image 11 and the hologram extend 15 respectively in first and second intersecting planes in a straight line called the X axis so that the source image 11 and the hologram 15 converge towards this X axis, the direction of convergence being partly opposite to the direction of gravity. In other words, the source image 11 and the hologram 15 extend respectively in first and second intersecting planes in a straight line called the X axis so that any vector starting from the X-axis, orthogonal to the X-axis and extending in the hologram 15, extends partly downwards, that is to say partly in a direction opposite to gravity, and any vector starting from the X-axis, orthogonal to the X-axis and extending in the source image 11, also extends partly downwards. In other words, the source image 11 and the hologram 15 extend respectively in first and second intersecting planes in a straight line called the X-axis so that the hologram 15 and the source image 11 extend below this X-axis considering the direction of gravity. Thus, the X axis is located, at each of its points, above the nearest points of the source image 11 and the hologram 15, the expression "above" being considered with respect to a sense of gravity. Naturally, according to this arrangement, the window 13 also extends below the X axis.

[0074] In this embodiment, the X axis is substantially horizontal considering the direction of gravity. However, it could be tilted without changing the fact that the source image 11 and the hologram 15 converge towards the X axis, the direction of convergence remaining opposite to gravity.

[0075] The station 1 also comprises a sensor 25 of biometric data of a hand 27 of the user 3. The sensor 25 of biometric data is positioned below the hologram 15, considering the direction of gravity, the sensor 25 extending substantially parallel to a plane in which the hologram 15 extends. The sensor 25 of biometric data is configured to capture data of the palmar venous pattern of the hand 27 in accordance with the “Palm Vein payment” project, as part of a biometric enrollment of the user 3. It is positioned optimally relative to the expected position of the hand 27 of the user 3 at the level of the hologram 15.

[0076] It results from this arrangement that the source image 11, the window 13 and the sensor 25 are arranged between them so that the hologram 15 defines an optimal position for capturing biometric data, from a hand 27 of a user 3, by the sensor 25, in particular when the user 3 is in the enrollment position. Indeed, the user 3 only has to place his hand 27 in accordance with the placement mark 19, via the positioning of his inter-finger with respect to the zone 23 in or on the hologram 15, so that the palm of his hand 27 is facing the biometric data sensor 25 in an optimal position for capturing data for the biometric enrollment of the user 3.The user is said to be in the “enrollment position” when, to perform the enrollment at the station 1, his face is facing the hologram 15, his gaze in a direction substantially orthogonal to the hologram, a position which allows him to place his hand 27 naturally, in or on the hologram 15, facing the biometric sensor 25.

[0077] The station 1 also comprises an infrared sensor 29 placed substantially in a plane in which the hologram 15 extends and configured to detect interactions between the hand 27 of the user 3 and the hologram 15. Thus, if the user 3 is invited by the content of the hologram 15 to interact with it, for example if the content of the hologram 15 is modified to integrate the design of a keyboard, his interactions, in particular via his fingers crossing the hologram 15, will be captured by the infrared sensor 29 and processed by conventional means. This may for example involve providing an identifier of his payment device via this virtual keyboard.

[0078] The station 1 also comprises a computer processing unit 31. The computer processing unit 31 is provided with conventional automated means, in particular a processor. It is connected to the biometric data sensor 25, to the infrared data sensor 29 and to the computer tablet 9. It receives information from these components and controls these components in accordance with the methods described 100, 200 and 300 below. For this purpose, the unit 31 implements a computer program 33 comprising instructions which, when the program 33 is executed by a computer, and specifically here by a processor such as the processor of the unit 31, lead the latter to implement the steps of the biometric enrollment method 100, the biometric identification method 200 or the payment method 300 as they will be described below.To implement this program 31, the processing unit comprises a computer-readable recording medium 35 comprising this program 33. In other words, this medium 35 comprises instructions which, when executed by a computer, or more precisely by a processor such as the processor of the unit 31, lead the latter to implement the steps of the biometric enrollment method 100, of the biometric identification method 200 or of the payment method 300 as described below.

[0079] In this embodiment, any variation in angle and distance between the elements described above of station 1 and illustrated in [Fig. 1] are conceivable, provided that the direction of convergence of the source image 11 and of the hologram 15, at least partly upwards, remains preserved.

[0080] In Figures 2 to 4, elements similar to those of [Fig.l] are designated by identical references.

[0081] [Fig.2] illustrates a second embodiment, concerning an enrollment station 37. It is identical to station 1 of [Fig.l] with regard to the window 13, the hologram 15, the biometric data sensor 25 and the content of the light image.

[0082] On the other hand, the support 39 of the luminous image 11 is not a computer tablet. In this embodiment, the support 39 of the luminous image 11 is a transparent film 39 including the source image 11. The hologram 15 is the result of an orthogonal symmetry of the transparent film 39 with respect to a plane of the window 13. The station 37 further comprises means 41 for projecting light towards the transparency 39 to make the source image 11 luminous. These projection means 41 are an LED panel 41 of reference BKL1325, from the BKlicht brand. This panel 41 and the window 13 form, with the base 7 and the housings of these elements, a container 43, including the transparent film 39, forming a black box, so that the LED panel 41 illuminates the transparency 39 and the window 13 sufficiently powerfully.

[0083] In this embodiment, the station 37 further comprises interaction means 45 for guiding the user during enrollment. These means 45 notably comprise a screen 47 for guiding the user 3. In particular, the screen 47 indicates to the user 3 that enrollment is available, that he can place his hand 27 on or in the hologram 15, and the screen 47 indicates to him when the data capture is complete. These interaction means 45 can also guide the user 3 to provide his information to associate his payment device with his identity. These interaction means 45 could be used for other types of interaction.

[0084] It is noted that in this embodiment, the infrared sensor is absent, it is replaced by the interaction means 45. It is therefore not possible to identify interactions between the hologram 15 and the hand 27 of the user 3.

[0085] However, the first and second embodiments are combinable in that, in addition to the interaction means 45 of the mode of [Fig.2], the infrared sensor 29 of the mode of [Fig.1] could be present in the same enrollment station.

[0086] [Fig. 3] illustrates a third embodiment of a biometric enrollment station 49 where only the positions of the source image 11, the window 13, the hologram 15 and the biometric data sensor 25 are represented. It differs from the embodiments of FIGS. 1 and 2 in that the angles and distances between the elements are constrained and specified. This station 49 therefore includes angles and distances between elements which could be applied both by station 1 of [Fig. 1] and by station 37 of [Fig. 2].

[0087] Thus, the angle between the source image 11 and the window 13, considered in the direction of the optical path from the source image 11 to the hologram 15, is substantially equal to 45°. As a result, the angle between the window 13 and the hologram 15, considered in the direction of the optical path from the window 13 to the hologram 15, is substantially equal to 45°, since it is equal to the angle between the source image 11 and the window 13.

[0088] These 45° angles generate an optimal compromise between sufficient visibility of the hologram 15 and sufficient invisibility of the source image 11 by the user 3 looking at the hologram 15 from the front. Indeed, the angle between the source image 11 and the hologram 15 being therefore substantially 90°, the user 3 looking at the hologram 15 from the front has difficulty seeing the source image 11, which is advantageous and comfortable. When the angle increases, the invisibility of the source image 11 is increased in the case where the user 3 moves, but the visibility of the hologram 15 risks being reduced in a disadvantageous manner.

[0089] Furthermore, the distance between the upper end of the source image 11 and the upper end of the glass 13 is 5 centimeters, so that the distance between the upper end of the glass 13 and that of the hologram 15 is also 5 centimeters.

[0090] The angle between the hologram 15 and a horizontal plane considering the direction of gravity, considered in the direction of the optical path from the source image 11 to the hologram 15, is equal to 20°. Generally speaking, it is advantageous for this angle to be less than or equal to 25°. Indeed, such an angle less than or equal to 25° allows the user 3 in the enrollment position to place his hand naturally in or on the hologram 15, without having to tilt his hand too much with respect to his wrist.

[0091] The optimal position of the biometric data sensor 25 is defined relative to the lower end of the hologram 15. The closest contour of the sensor 25 is located 5.5 centimeters from a plane passing through the indication of the interfinger 23 in a direction orthogonal to the plane in which the hologram 15 extends. The plane in which the sensor 25 extends in parallel with the hologram 15 is located 5 centimeters from the hologram.

[0092] It should be noted that this positioning of the biometric data sensor 25 is made possible by the convergence of the source image 11 and the hologram 15 going in the opposite direction to gravity. Indeed, this results in the hologram 15 and the window 13 diverging downwards, leaving a space large enough to place the biometric data sensor 25 under the hologram 15 and at a distance from it in an optimal reading position.

[0093] In this embodiment, a plane 49 intersects a segment of one end of the hologram 15 and a segment of a contour of the biometric data sensor 25, so that all the other points of the hologram 15 are located in a first half-space on one side of the plane and all the other points of the biometric data sensor 25 are located in a second half-space on the other side of the plane 49. This plane 49 comprises a straight line which reaches an eye of a user 3 in the enrollment position. This straight line represents the different optimal positions for the eyes of a user in the enrollment position. Indeed, a user looking along this straight line can naturally put his hand, without effort, at the level of the hologram 15 and parallel to the biometric data sensor 25, while looking at the hologram 15 in front of him. In [Fig.3], the plane and the straight line of this plane are merged.

[0094] This embodiment is fully combinable with the embodiments of Figures 1 and 2, since it represents a specific version of these modes. Furthermore, those skilled in the art will understand that, if desired, only some of the characteristics of this mode of [Fig.3] can be applied to the modes of Figures 1 and 2. In particular, only the 45° angles can be used, or only the specified distances, or even only the position of the secant plane 49.

[0095] [Fig. 4] schematically illustrates fourth and fifth embodiments of a biometric enrollment station 53, which are also specific versions of the respective embodiments of Figures 1 and 2, combinable with some or all of the elements of the embodiment of [Fig. 3]. Indeed, [Fig.4] illustrates two possible positions of the source image 11 relative to the window 13. According to these positions, the field of vision 55 of the user 3 does not offer the same view of the source image 11. According to the first possible positioning, the source image 11 closest to the window 13, shown diagrammatically in broken lines, is arranged so that, when the user 3 observes his projection, that is to say the hologram 15 formed on the other side of the window 13 and shown diagrammatically in broken lines, he can also see the source image 11 through the window.Conversely, according to the second possible positioning, the source image 11 shown in continuous lines is positioned further from the window 13 so that the user 3 observing the corresponding hologram 15, in continuous lines, cannot see the source image 11 through the window 13. In other words, in the mode where the source image 11 and the hologram are shown in continuous lines, the source image 11 and the window 3 are arranged so that a user 3 in the enrollment position cannot see, through the window 13, the source image 11.

[0096] This second positioning is the most advantageous, because the fact of not seeing the source image 11 through the window 13 makes the user experience more comfortable for the user 3. This second positioning can be obtained by implementing all or part of the angles and distances of the mode of [Fig. 3]. It can also be obtained by arranging the different elements of the station 1 or 37 differently.

[0097] The enrollment method 100 of [Fig.6] is implemented by the computer unit 31 of a biometric enrollment station corresponding to any embodiment or combination of embodiments presented above. Station 1 and station 37 will be considered below.

[0098] In step 101, the user 3 being in the enrollment position at the biometric enrollment station 1, the computer processing unit 31 controls the projection of the hologram 15. This involves, for example, controlling the display of the image 11 on the tablet 9. For the station 37 of [Fig. 2], this would involve controlling the LED panel 41.

[0099] In step 102, when the hand 27 of the user 3 is positioned in accordance with the position defined by the hologram 15, the computer processing unit 31 controls the capture of the biometric data of the hand by the biometric data sensor 25.

[0100] Step 103 is the association of the identity of the user 3 with a payment device and / or with a unique identifier of a payment device. Thus, the enrollment station 1 or 37 allows the user, via the infrared sensor 29 of [Fig.l] and / or the interaction means 45 of [Fig.2], to provide his payment information to the enrollment station. This may in particular involve associating his identity with a unique identifier of the payment device, which may be called a “token”. This is then referred to as “tokenization” of the payment device. It could also involve associating his identity with a kitty of a store, or a cryptocurrency wallet of his choice. In this way, his identity is associated with his means of payment. He will only have to identify himself by exposing the palm of his hand to make a subsequent payment.

[0101] The biometric identification method 200 of [Fig.7], of a user 3 with a biometric identification device not illustrated, allowing the biometric identification of this user, is implemented when an enrollment of the user 3 has been carried out beforehand in accordance with the biometric enrollment method 100. The only step of this method 200 is therefore the identification, with a biometric identification data capture device, of the biometric data of the vein pattern of the palm of the hand of the user. The latter having been enrolled beforehand thanks to the enrollment station, the data captured during the identification are compared with the data recorded in the database during the enrollment, and the identification is validated when the user 3 is identified in the database.

[0102] The method 300 of [Fig.8] is a payment method. It follows the implementation of the biometric enrollment method 100.

[0103] Step 301 of this payment method is the biometric identification of the user, who in this case has the role of buyer, with a biometric identification device, in accordance with method 200.

[0104] Step 302 is, if the biometric identification of the buyer is validated, the automatic payment of the buyer. Thus, the user does not have to handle his payment card, his smartphone or another payment device. He only has to expose the palm of his hand in front of a biometric data capture device. The data is then compared to the data recorded in the database during the enrollment of the process 100, in order to identify the user. In addition, the payment is made automatically since his bank account or payment device was associated with his biometric identity at the stage of the enrollment process 100.

[0105] The invention is not limited to the embodiments presented and other embodiments will become clear to those skilled in the art. In particular, the capture of biometric data is not limited to the capture of palm pattern data; it could be hand data of another type. List of references

[0106] 1: biometric enrollment station 3: user

[0107] 5: frame

[0108] 7: base

[0109] 9: computer tablet

[0110] 11: source image [YES] 13: holographic window

[0112] 15: hologram

[0113] 17, 43: black box

[0114] 19: placement mark

[0115] 21: drawing of the silhouette of a hand

[0116] 23: inter-finger

[0117] 25: biometric data sensor

[0118] 27: hand

[0119] 29: infrared sensor

[0120] 31: computer processing unit

[0121] 33: computer program

[0122] 35: recording medium

[0123] 37: station biometric enrollment

[0124] 39: transparent film

[0125] 41: LED panel

[0126] 45: means of interaction

[0127] 47: screen

[0128] 49: secant plane

[0129] 51: biometric enrollment station

[0130] 53: biometric enrollment station

[0131] 55: field of vision

[0132] 100: biometric enrollment method

[0133]

[0134] 200: biometric identification method 300: payment method

Claims

Claims

1. Biometric enrollment station (1; 37; 51; 53), characterized in that it comprises: - a support (9; 39) of a light image (11), the light image forming a source image (11); - a holographic window (13) configured to project the source image (11), the projected source image forming a hologram (15), the hologram (15) being the result of an orthogonal symmetry of the source image (11) relative to a plane of the window (13); - a sensor (25) of biometric data of a hand (27) of a user (3);the source image (11), the glass (13) and the sensor (25) being arranged between them so that the hologram (15) defines an optimal position for capturing biometric data, from a hand (27) of a user (3), by the sensor (25), the glass (13) being inclined relative to the source image (11), an angle between the source image (11) and the glass (13), considered in the direction of the optical path from the source image (11) to the hologram (15), being substantially equal to 45°.;

2. Station (53) according to claim 1, in which the source image (11) and the window (13) are arranged so that a user in the enrollment position cannot see, through the window, the source image.

3. Station (1; 37; 51; 53) according to any one of the preceding claims, in which the source image (11) and the hologram (15) extend respectively in first and second intersecting planes in a straight line called axis (X) so that the source image (11) and the hologram (15) converge towards this axis (X), the direction of convergence being at least partly opposite to the direction of gravity.

4. Station (1; 37; 51; 53) according to the preceding claim, in which the axis (X) is substantially horizontal considering the direction of gravity.

5. Station (1; 37; 51; 53) according to any one of the preceding claims, wherein an angle between the hologram (15) and a horizontal plane considering the direction of gravity, considered in the direction of the optical path from the source image (11) towards the hologram (15), is less than or equal to 25°.

6. Station (1; 37; 51; 53) according to any one of the preceding claims, in which the biometric data sensor (25) is positioned below the hologram (15), considering the direction of gravity, the sensor (25) extending substantially parallel to a plane in which the hologram (15) extends.

7. Station (1; 37; 51; 53) according to the preceding claim, in which, a plane (49) being intersecting with a segment of one end of the hologram (15) and with a segment of a contour of the biometric data sensor (25), so that all the other points of the hologram (15) are located in a first half-space on one side of the plane (49) and all the other points of the biometric data sensor (25) are located in a second half-space on the other side of the plane (49), the plane (49) comprises a straight line which reaches an eye of the user (3) in the enrollment position.

8. Station (1; 37; 51; 53) according to any one of the preceding claims, in which the hologram (15) comprises a placement mark (19, 21, 23) of the hand of the user (3), preferably a placement mark (19) of a fingertip, in particular of a fingertip located between a ring finger and a middle finger of the hand.

9. Station (1) according to any one of the preceding claims, in which the light image support is a computer tablet (9) provided with a screen for displaying the light image (H).

10. Station (37) according to any one of the preceding claims, in which the luminous image support is a transparent film (39) including the source image, the station further comprising means (41) for projecting light towards the transparent film (39) to make the source image (11) luminous.

Images