Holographic biometric enrollment station

Abstract

The invention is a biometric enrollment station (1), comprising: - a support (9) for a luminous image (11), the luminous 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) with respect to a plane of the window (13); - a biometric data sensor (25) for a user's (3) hand (27); the source image (11), the window (13), and the sensor (25) being arranged so that the hologram (15) defines an optimal position for capturing biometric data from a user's (3) hand (27) by the sensor (25). Figure for the 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 enabling the capture of the palmar vein pattern of a hand.

[0002] To perform such biometric enrollment, a user in an enrollment position at the station places the palm of their hand in front of a biometric data sensor on the station. The sensor operates by emitting and receiving near-infrared radiation, in order to capture the vein pattern of the user's palm. Once the biometric data is thus captured, it is recorded and associated with the user in a database.

[0003] Subsequently, the user can undergo biometric identification. During the biometric identification process, at a biometric identification station, the user also places the palm of their hand in front of a biometric data sensor on the station, in order to capture the vein pattern of that palm. The captured biometric data is compared to the data recorded in the database during enrollment, in order to identify the user.

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

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

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

[0007] To address this need for precision during enrollment, a biometric enrollment station comprising a guide is already known in the art. The guide takes 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 their fingers on it. In this way, the user is encouraged to expose the palm of their hand at a distance from the sensor that 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 contradicts the "contactless" nature promised by this system and its hygienic advantage, which risks hindering 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 near-infrared signals by the sensor to capture biometric data is then hampered 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 allows the user considerable freedom in positioning. It is therefore insufficient to guarantee optimal positioning. For this reason, in addition to this guide, text is displayed on a screen to indicate to the user how to better position their hand if necessary. However, understanding and applying these instructions can also be difficult. Linguistic and iconographic confusion exists, such as confusion between requests to move one's hand "forward" or "upward."

[0011] Finally, the use of the guide implies contact between the hand and the guide, which goes against the "contactless" character.

[0012] The invention aims to simplify and accelerate the biometric enrollment process relating to the capture of biometric data from a hand, such as its palm pattern, by a technique facilitating the user's enrollment experience, 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 luminous image, the luminous 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 for a user's hand;

[0017] the source image, the glass and the sensor being arranged together so that the hologram defines an optimal position for capturing biometric data, of a user's hand, by the sensor, 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, being less than or equal to 25°.

[0018] Thus, the hologram, projected in space, indicates to the user how to optimally position their hand, which facilitates data capture by the sensor. The user does not make contact with a physical surface since they only interact 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 enjoyable for the user.

[0019] Moreover, this angle allows the user in the enrollment position to place their hand naturally at the level of the hologram by extending it into or over it, in continuity with a movement of the arm towards the hologram without having to orient their hand at too great an angle at the wrist.

[0020]

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

[0022] Preferably the glass is inclined with respect to the source image.

[0023] Thus, the hologram is also, by orthogonal symmetry, inclined relative to the glass, at the same angle. This inclination allows the hologram to be oriented towards the user's eyes while moving the source image further away, making it possible for a user facing the hologram to distinguish it from the source image. Furthermore, this inclination improves the hologram's brightness.

[0024] Advantageously, an angle between the source image and the glass, considered in the direction of the optical path from the source image to the hologram, is substantially equal to 45°.

[0025] Thus, the angle between the source image and the hologram is approximately 90°, so that the user, with their eyes orthogonally facing the hologram, does not see the source image through the glass and therefore only has the hologram in their field of vision, which is comfortable. This is also an angle at which the brightness of the hologram is optimal if the source is not placed far from the glass.

[0026] Preferably, the source image and the glass are arranged so that a user in an enrollment position cannot see the source image through the glass.

[0027] Thus, the user in the enrollment position is not bothered by the view of the source image through the glass when viewing the hologram. Depending on the user's enrollment position, this result can be achieved through various arrangements involving a predetermined angle between the glass and the hologram, for example, at least 45°, combined with a predetermined distance between one end of the source image and the glass, for example, at least 5 centimeters, and combined with a predetermined optimal orientation of the entire glass and source assembly so that the hologram is optimally oriented towards the eyes of an average user positioned at a distance from the hologram that allows for natural interaction. Since these parameters are interdependent, several configurations are possible to achieve this result.

[0028] Advantageously, the source image and the hologram extend respectively in first and second planes intersecting in a straight line called the 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.

[0029] In other words, the source image and the hologram extend respectively in first and second planes intersecting 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.

[0030] In other words, the source image and the hologram extend respectively in first and second planes intersecting in a straight line called the axis so that the hologram and the source image extend below this axis considering the direction of gravity.

[0031] In other words, the axis is located, at each of its points, above the points closest to the source image and the hologram.

[0032] This arrangement generates two cumulative effects: the hologram is oriented towards the user, and the space beneath the hologram is empty, specifically unoccupied by the glass, since in this arrangement both the glass and the source image diverge downwards relative to the hologram. The empty space beneath the hologram allows for the placement of an object, if necessary, such as a sensor or means of interaction with the user's hand placed at the level of the hologram. Conversely, if the hologram, the source image, and the glass were to converge upwards, the empty space beneath the hologram would risk being occupied or obstructed by part of the glass.

[0033] 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.

[0034] Thus, the sensor is positioned facing and parallel to the user's hand as it is placed in or on the hologram. The sensor's positioning relative to the hand is therefore optimal for capturing biometric data. Furthermore, this sensor does not interfere with the projection of the hologram through the glass.

[0035] 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 other points of the hologram are located in a first half-space on one side of the plane and all other points of the biometric data sensor are located in a second half-space on the other side of the plane, the plane includes a straight line which reaches an eye of the user in enrollment position.

[0036] Thus, any user, whether tall or short, as long as one of their eyes is positioned on this line—which is achieved by moving away from or towards the enrollment station—will be in an optimal enrollment position since they will only need to place their hand naturally in or on the hologram for it to be in the optimal position for capture by the biometric data sensor. A tall user will be positioned further to the right than a short user. This arrangement therefore allows the station to be adapted to any user height.

[0037] Advantageously, the hologram includes a user hand placement marker, preferably a finger placement marker, in particular a finger placement marker located between a ring and middle finger of the hand.

[0038] 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 lying flat, the fingers naturally spread apart.

[0039] Thanks to this marker, regardless of the size of the user's hand, it will be optimally positioned for the capture of biometric data by the biometric data sensor.

[0040] Preferably, the luminous image support is a computer tablet equipped with a screen to display the luminous image.

[0041] Thus, a computer tablet is used to generate the source image. This medium allows for easy changing of the source image, as it is simply a matter of controlling the tablet. The illuminated image can also be dynamic. Furthermore, the illumination of the illuminated image is an integral part of the tablet, so the entire assembly takes up minimal space in the workstation.

[0042] Alternatively, the luminous image support is a transparent film including the source image, the station further comprising means for projecting light onto the transparent film to make the source image luminous.

[0043] This arrangement is less expensive and more energy-efficient than using a tablet. On the other hand, the illuminated 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 occupy more space than a computer tablet.

[0044] Advantageously, the station further includes 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.

[0045] 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.

[0046] Preferably, the station further includes means of interaction to guide the user during enrollment.

[0047] Thus, these means can take the form of a terminal and / or a screen guiding the user in their enrollment process, in particular to indicate the different stages and the validation of the enrollment.

[0048] Advantageously, the biometric data sensor is configured to capture data from the palmar venous pattern of the hand.

[0049] Thus, the sensor sends and receives signals from the near-infrared and is specifically adapted for capturing data enabling subsequent identification of a user via the palm pattern of his hand.

[0050] The invention also provides a method for biometric user enrollment, comprising the following steps:

[0051] - the user being in an enrollment position at an enrollment station biometric as described above, hologram projection;

[0052] - when the user's hand is positioned according to the defined position via hologram, capture of biometric data from the hand by the biometric data sensor.

[0053] The invention also provides a method for biometrically identifying a user with a biometric identification device, in which a biometric enrollment of the user, enabling the biometric identification of this user, has been carried out beforehand in accordance with the biometric enrollment method as described above.

[0054] The invention also provides for a payment method, comprising the implementation of the following steps:

[0055] - biometric identification of a physical buyer at a device biometric identification in accordance with the biometric identification process as described above;

[0056] - if the buyer's biometric identification is validated, automatic payment of the buyer.

[0057] The invention also provides for a computer program comprising instructions which, when the program is executed by a computer, lead the computer to implement the steps of the biometric enrollment process as described above, the biometric identification process as described above, or the payment process as described above.

[0058] The invention also provides a computer-readable recording medium comprising instructions which, when executed by a computer, cause the computer to carry out the steps of the biometric enrollment process as described above, the biometric identification process as described above, or the payment process as described above. Brief description of the figures

[0059] The invention will be better understood upon reading the following description, given solely by way of example and made with reference to the accompanying drawings in which:

[0060] [Fig-1] is a diagram of a first embodiment of a biometric enrollment station of the invention;

[0061] [Fig.2] is a diagram of a second embodiment of the station;

[0062] [Fig.3] is a diagram of a third embodiment of the station;

[0063] [Fig.4] is a diagram of the fourth and fifth embodiments of the station;

[0064] [Fig.5] is a diagram of a hand placement marker;

[0065] [Fig.6] is a flowchart of a biometric enrollment method of the invention;

[0066] [Fig.7] is a flowchart of a biometric identification method of the invention;

[0067] [Fig.8] is a flowchart of a payment method of the invention. Detailed description

[0068] 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.

[0069] The enrollment station 1 comprises a frame 5, which is equipped with housings and / or means for holding in position the various elements of the station described below. The frame includes a base 7 enabling the station 1 to be stabilized on a horizontal support, taking into account the direction of gravity. This base can be replaced by feet or any other means of stabilizing the station.

[0070] The enrollment station 1 of [Fig. 1] comprises a support 9 for a luminous image 11, the luminous image 11 forming a source image 11. The term "source image" distinguishes this image 11 from a hologram 15 introduced below. In this first embodiment, the luminous image support 9 is a computer tablet 9 equipped with a screen for displaying the luminous image 11.

[0071] Station 1 also includes 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.

[0072] The tablet 9 and the glass 13, together with the base 7 and the housings for these elements, form an empty, closed container, a black box 17. In particular, the immediate environment of the tablet 9 generates no light. The illumination generated by the tablet 9 towards the glass 13 is 1000 nits, i.e., 1000 candelas per square meter (cd / m²). Thus, the projection of the hologram 15 on the other side of the glass 13 is sufficiently clear and sharp, even in the presence of light on the side of the hologram 15.

[0073] The luminous image 11, and therefore the hologram 15, which is its projection, includes a placement marker 19 for the user's hand, as illustrated in [Fig. 5]. This marker comprises a drawing 21 of the silhouette of an average-sized hand and, between the ring and middle fingers of this drawn hand, a placement indicator 23 for a finger spacer, indicated by a red circle. This marker 19 allows any user, regardless of hand size, to position their hand correctly by placing their finger spacer at the level of the finger spacer 23 of the hologram 15. The term "finger space" 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 being placed flat, the fingers naturally spread apart.

[0074] The hand placement marker 19 could, however, be different. The luminous image 11 could also include an incentive to interact with the hologram 15, for example, by displaying a virtual keyboard. It should be noted that, since the support 9 for the luminous image is a tablet, the image 11, and therefore the hologram 15, can be dynamic.

[0075] Station 1 is arranged so that the source image 11 and the hologram 15 extend respectively in first and second planes intersecting a straight line called the X-axis, such 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 planes intersecting a straight line called the X-axis, such that any vector starting from The X-axis, orthogonal to the X-axis and extending into the hologram 15, extends partly downwards, that is, partly in a direction opposite to gravity, and any vector originating from the X-axis, orthogonal to the X-axis and extending into 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 planes intersecting a line called the X-axis, such that the hologram 15 and the source image 11 extend below this X-axis when considering the direction of gravity. Thus, the X-axis lies, at each of its points, above the points closest to the source image 11 and the hologram 15, the term "above" being understood with respect to a direction of gravity. Naturally, according to this arrangement, the window 13 also extends below the X axis.

[0076] In this embodiment, the X-axis is substantially horizontal with respect to the direction of gravity. However, it could be inclined 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.

[0077] Station 1 also includes a biometric data sensor 25 for a hand 27 of the user 3. The biometric data sensor 25 is positioned below the hologram 15, taking into account the direction of gravity, with the sensor 25 extending substantially parallel to a plane in which the hologram 15 extends. The biometric data sensor 25 is configured to capture data from the palmar vein 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 optimally positioned with respect to the expected position of the user 3's hand 27 at the level of the hologram 15.

[0078] As a result of this arrangement, the source image 11, the glass 13, and the sensor 25 are arranged in such a way that the hologram 15 defines an optimal position for capturing biometric data from a user's hand 27 by the sensor 25, particularly when the user 3 is in an enrollment position. Indeed, the user 3 only needs to position their hand 27 according to the placement marker 19, by positioning their interdigital space relative to the area 23 in or on the hologram 15, so that the palm of their hand 27 is facing the biometric data sensor 25 in an optimal position for data capture for the biometric enrollment of the user 3.The user is said to be in "enrollment position" when, in order to complete enrollment at station 1, his face is facing the hologram 15, his gaze in a substantially orthogonal direction to the hologram, a position which allows him to place his hand 27 in a natural way, in or on the hologram 15, in front of the biometric sensor 25.

[0079] Station 1 also includes an infrared sensor 29 positioned substantially in a plane in which the hologram 15 extends and configured to detect interactions between the hand 27 of user 3 and the hologram 15. Thus, if user 3 is prompted by the content of the hologram 15 to interact with it, for example, if the content of the hologram 15 is modified to include the image of a keyboard, their interactions, particularly via their fingers passing through the hologram 15, will be captured by the infrared sensor 29 and processed by conventional means. This could, for example, involve providing an identifier for their payment device via this virtual keyboard.

[0080] Station 1 also includes a computer processing unit 31. The computer processing unit 31 is equipped with conventional automated means, in particular a processor. It is connected to the biometric data sensor 25, the infrared data sensor 29, and the computer tablet 9. It receives information from these components and controls them in accordance with the processes described 100, 200, and 300 below. To this end, 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, cause the computer to carry out the steps of the biometric enrollment process 100, the biometric identification process 200, or the payment process 300 as described below.To implement this program 31, the processing unit includes a computer-readable recording medium 35 containing this program 33. In other words, this medium 35 includes instructions which, when executed by a computer, or more precisely by a processor such as the processor of the unit 31, lead it to implement the steps of the biometric enrollment process 100, the biometric identification process 200 or the payment process 300 as described below.

[0081] In this embodiment, any variation of 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 the hologram 15, at least partly upwards, remains preserved.

[0082] In figures 2 to 4, elements analogous to those in [Fig.1] are designated by identical references.

[0083] [Fig.2] illustrates a second embodiment, concerning an enrollment station 37. It is identical to station 1 of [Fig.1] with regard to the window 13, the hologram 15, the biometric data sensor 25 and the content of the light image.

[0084] In contrast, the support 39 for the luminous image 11 is not a computer tablet. In this embodiment, the support 39 for 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 glass 13. The station 37 further includes means 41 for projecting light onto the transparency 39 to illuminate the source image 11. These projection means 41 are a BKL1325 LED panel 41 from the BKlicht brand. This panel 41 and the glass 13, together with the base 7 and the housings for these elements, form a container 43, including the transparent film 39, forming a black box, so that the LED panel 41 illuminates the transparency 39 and the glass 13 with sufficient power.

[0085] In this embodiment, the station 37 further includes interaction means 45 to guide the user during enrollment. These means 45 include, in particular, a screen 47 for guiding the user 3. Specifically, the screen 47 indicates to the user 3 that enrollment is available, that they can place their hand 27 on or in the hologram 15, and the screen 47 indicates when data capture is complete. These interaction means 45 can also guide the user 3 in providing their information to link their payment device to their identity. These interaction means 45 could be used for other types of interaction.

[0086] It should be 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.

[0087] 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.

[0088] Figure 3 illustrates a third embodiment of a biometric enrollment station 49 where only the positions of the source image 11, the glass 13, the hologram 15, and the biometric data sensor 25 are shown. It differs from the embodiments of Figures 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 that could be applied by both station 1 of Figure 1 and station 37 of Figure 2.

[0089] Thus, the 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, is approximately equal to 45°. It follows that the angle between the glass 13 and the hologram 15, considered in the direction of the optical path from the glass 13 to the hologram 15, is approximately equal to 45°, since it is equal to the angle between the source image 11 and the glass 13.

[0090] These 45° angles generate an optimal compromise between sufficient visibility of the hologram 15 and sufficient invisibility of the source image 11 for the user 3 viewing the hologram 15 head-on. Indeed, since the angle between the source image 11 and the hologram 15 is then approximately 90°, the user 3 viewing the hologram 15 head-on can barely see the source image 11, which is advantageous and comfortable. As the angle increases, the invisibility of the source image 11 increases if the user 3 moves, but the visibility of the hologram 15 risks being reduced to a disadvantageous degree.

[0091] In addition, 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.

[0092] The angle between the hologram 15 and a horizontal plane, considering the direction of gravity, along the optical path from the source image 11 to the hologram 15, is 20°. Generally, it is advantageous for this angle to be less than or equal to 25°. Indeed, such an angle of less than or equal to 25° allows the user 3, in the enrollment position, to place their hand naturally in or on the hologram 15, without having to tilt their hand excessively relative to their wrist.

[0093] The optimal position of the biometric data sensor 25 is defined with respect 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 finger interdental marking 23 in a direction orthogonal to the plane in which the hologram 15 extends. The plane in which the sensor 25 extends parallel to the hologram 15 is located 5 centimeters from the hologram.

[0094] 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 moving in the opposite direction to gravity. Indeed, this results in the hologram 15 and the glass 13 diverging downwards, leaving a sufficiently large space to place the biometric data sensor 25 below and at a distance from the hologram 15 in an optimal reading position.

[0095] 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, such that all other points of the hologram 15 are located in a first half-space on one side of the plane and all 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 includes a line that reaches an eye of a user 3 in the enrollment position. This line represents the different optimal eye positions of a user in the enrollment position. Indeed, a user looking Along this line, one can naturally place their hand, effortlessly, at the level of the hologram 15 and parallel to the biometric data sensor 25, while looking at the hologram 15 in front of them. In [Fig. 3], the plane and the line of this plane coincide.

[0096] This embodiment is fully combinable with the embodiments of Figures 1 and 2, as it represents a specific version of those embodiments. Furthermore, those skilled in the art will understand that, if desired, only certain features of this embodiment in [Fig. 3] may be applied to the embodiments of Figures 1 and 2. In particular, only the 45° angles may be used, or only the specified distances, or only the position of the intersecting plane 49.

[0097] Figure 4 schematically illustrates the 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 in Figure 3. Indeed, Figure 4 illustrates two possible positionings of the source image 11 relative to the glass 13. Depending on these positionings, 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 glass 13, shown schematically in dashed lines, is arranged so that, when the user 3 observes their projection, i.e., the hologram 15 formed on the other side of the glass 13 and shown schematically in dashed lines, they can also see the source image 11 through the glass.Conversely, according to the second possible positioning, the source image 11, schematically represented 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 schematically represented in continuous lines, the source image 11 and the window 3 are arranged so that a user 3 in an enrollment position cannot see the source image 11 through the window 13.

[0098] This second positioning is the most advantageous, because not seeing the source image 11 through the glass 13 makes the user experience more comfortable for user 3. This second positioning can be achieved by implementing all or part of the angles and distances of the mode in [Fig. 3]. It can also be achieved by arranging the various elements of station 1 or 37 differently.

[0099] The enrollment process 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 hereafter.

[0100] At step 101, with user 3 in the enrollment position at the biometric enrollment station 1, the computer processing unit 31 commands the projection of the hologram 15. This involves, for example, commanding the display of the image 11 on the tablet 9. For station 37 in [Fig.2], this would involve commanding the LED panel 41.

[0101] At step 102, when the hand 27 of the user 3 is positioned according to the position defined by the hologram 15, the computer processing unit 31 commands the capture of the biometric data of the hand by the biometric data sensor 25.

[0102] Step 103 is the association of the user's identity 3 with a payment device and / or a unique identifier of a payment device. Thus, the enrollment station 1 or 37 allows the user, via the infrared sensor 29 of [Fig. 1] and / or the interaction means 45 of [Fig. 2], to provide their payment information to the enrollment station. This may involve associating their identity with a unique identifier of the payment device, which can be called a "token." This is referred to as "tokenization" of the payment device. It could also involve associating their identity with a store's loyalty program or a cryptocurrency wallet of their choice. In this way, their identity is linked to their payment methods. They will only need to identify themselves by holding up their palm to make a subsequent payment.

[0103] The biometric identification process 200 of [Fig. 7], for a user 3 at a biometric identification device not shown, enabling the biometric identification of this user, is implemented when user 3 has been previously enrolled in accordance with the biometric enrollment process 100. The only step of this process 200 is therefore the identification, at a biometric identification data capture device, of the biometric data of the vein pattern of the user's palm. Since the user has previously enrolled using the enrollment station, the data captured during identification is compared to the data recorded in the database at the time of enrollment, and the identification is validated when user 3 is identified in the database.

[0104] The method 300 of [Fig.8] is a payment method. It follows the implementation of the biometric enrollment method 100.

[0105] Step 301 of this payment process is the biometric identification of the user, who in this case has the role of buyer, with a biometric identification device, in accordance with process 200.

[0106] Step 302 is, if the buyer's biometric identification is validated, the automatic payment of the buyer. Thus, the user does not have to handle their payment card, smartphone, or other payment device. They only have to display the palm of His hand is placed in front of a biometric data capture device. The data is then compared to the data recorded in the database during enrollment in process 100, in order to identify the user. Furthermore, payment is processed automatically since his bank account or payment device was linked to his biometric identity during enrollment process 100.

[0107] The invention is not limited to the embodiments presented, and other embodiments will be obvious 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 involve other types of hand data. List of references

[0108] 1: Biometric enrollment station 3: User

[0109] 5: Frame

[0110] 7: Base [YES] 9: Computer tablet

[0112] 11: Source image

[0113] 13: Holographic window

[0114] 15: Hologram

[0115] 17, 43: Black box

[0116] 19: Placement marker

[0117] 21: Hand silhouette drawing

[0118] 23: Finger gap

[0119] 25: Biometric data sensor

[0120] 27: Hand

[0121] 29: Infrared sensor

[0122] 31: Computer processing unit

[0123] 33: Computer program

[0124] 35: Recording medium

[0125] 37: Station biometric enrollment

[0126] 39: transparent film

[0127] 41: LED panel

[0128] 45: interaction means

[0129] 47: screen

[0130] 49: cutting plane

[0131] 51: biometric enrollment station

[0132] 53: biometric enrollment station

[0133] 55: field of view

[0134] 100: biometric enrollment method

[0135]

[0136] 200: biometric identification method 300: payment method

Claims

Demands

1. Biometric enrollment station (1; 37; 51; 53), characterized in that it comprises: - a support (9; 39) for a luminous image (11), the luminous 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) with respect to a plane of the window (13); - a biometric data sensor (25) for a hand (27) of a user (3);the source image (11), the glass (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), 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) to the hologram (15), being less than or equal to 25°.;

2. Station (1; 37; 51; 53) according to the preceding claim, wherein the glass (13) is inclined with respect to the source image (11).

3. Station (51) according to the preceding claim, wherein 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), is substantially equal to 45°.

4. Station (53) according to any one of the preceding claims, wherein the source image (11) and the glass (13) are arranged so that a user in an enrollment position cannot see the source image through the glass.

5. Station (1; 37; 51; 53) according to any one of the preceding claims, wherein the source image (11) and the hologram (15) extend respectively in first and second planes intersecting a straight line called axis (X) such 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.

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

7. Station (1; 37; 51; 53) according to any one of the preceding claims, wherein 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.

8. Station (1; 37; 51; 53) according to the preceding claim, wherein, 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), such that all other points of the hologram (15) are located in a first half-space on one side of the plane (49) and all 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) includes a straight line which reaches an eye of the user (3) in the enrollment position.

9. Station (1; 37; 51; 53) according to any one of the preceding claims, wherein the hologram (15) includes a user's (3) hand placement marker (19, 21, 23), preferably a finger placement marker (19), in particular a finger placement marker located between a ring and middle finger of the hand.

10. Station (1) according to any one of the preceding claims, wherein the luminous image support is a computer tablet (9) equipped with a screen for displaying the luminous image (H).

Images