WO2017140445A1 - Dispositif comprenant un capteur d'image pour acquérir des données d'image et procédé pour authentifier des données d'image acquises au moyen d'un capteur d'images - Google Patents

Dispositif comprenant un capteur d'image pour acquérir des données d'image et procédé pour authentifier des données d'image acquises au moyen d'un capteur d'images Download PDF

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Publication number
WO2017140445A1
WO2017140445A1 PCT/EP2017/050774 EP2017050774W WO2017140445A1 WO 2017140445 A1 WO2017140445 A1 WO 2017140445A1 EP 2017050774 W EP2017050774 W EP 2017050774W WO 2017140445 A1 WO2017140445 A1 WO 2017140445A1
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WO
WIPO (PCT)
Prior art keywords
image sensor
image data
identification pattern
authentication process
authentication
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2017/050774
Other languages
German (de)
English (en)
Inventor
Oscar ALONSO GARRIDO
Michael Gschnass
Pierre-Olivier GUISLAIN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of WO2017140445A1 publication Critical patent/WO2017140445A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61L—GUIDING RAILWAY TRAFFIC; ENSURING THE SAFETY OF RAILWAY TRAFFIC
    • B61L23/00—Control, warning or like safety means along the route or between vehicles or trains
    • B61L23/04—Control, warning or like safety means along the route or between vehicles or trains for monitoring the mechanical state of the route
    • B61L23/041—Obstacle detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
    • H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N2201/00—Indexing scheme relating to scanning, transmission or reproduction of documents or the like, and to details thereof
    • H04N2201/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
    • H04N2201/3201—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
    • H04N2201/3225—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document
    • H04N2201/3233—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title of data relating to an image, a page or a document of authentication information, e.g. digital signature, watermark

Definitions

  • the present invention is based on the object, a device with an image sensor for acquiring image data to provide a reliable authentication of the image data captured by the image sensor.
  • the device has a surface light modulator with a matrix of micromirrors, which are arranged in the beam path in front of the image sensor, that light detected by the device is directed to an associated pixel or pixel region of the image sensor exclusively in an activated state of the respective micromirror, and wherein the device is designed, as part of an authentication process, to act on the image sensor by selectively switching on and / or off at least one of the micromirrors with at least one identification pattern, to compare the image data acquired by the image sensor with the respective identification pattern, and to authenticate the image sensor Capture captured image data, provided that they are consistent with the respective identification pattern.
  • the device according to the invention is thus initially characterized by having a surface light modulator with a matrix of micromirrors.
  • a surface light modulator is a microelectromechanical component for the dynamic modulation of light.
  • the micromirrors are arranged in front of the image sensor in the beam path in such a way that light detected by the device is directed to an associated pixel or pixel region of the image sensor only in an activated state of the respective micromirror.
  • the micromirror of area can take discrete deflections light modulators typically, the micro mirrors have two stable Endzu ⁇ stands usually between which they frequency with a high switching can change, for example, 5000 Hz.
  • one of the states of the micromirrors is referred to as "on”, while the other state is referred to as “off” becomes.
  • this formulation expressed that "on” of the device, for instance by means of a OBJEK ⁇ tivs, detected light exclusively in the state of respective micromirror is directed to an associated pixel or pixel area of the image sensor and so ⁇ with the pixel concerned or pixel area in the "abgeschalte ⁇ th" state of the micro-mirror is "dark". so ⁇ away a spatial light modulator having more than two stable end states is used, the "on” or the can “off” state in accordance with the present invention, respectively, by one or more of these final states are realized.
  • the device according to the invention is further distinguished by the fact that it is designed, in the context of an authentication process, to act upon the image sensor by selectively switching on and / or off at least one of the micromirrors with at least one identification pattern.
  • the surface light modulator is used in the upstream lying invention to impart an identification ⁇ pattern on the image sensor.
  • the micro mirrors controls reasonable individually according to the respective identification patterns, respectively are aligned.
  • the comparison of the acquired image data with the respective identification pattern takes place here in such a way that an authentication of the Image data does not already fail due to individual, minor pixel errors, which as such neither limit the function of the image sensor nor question that an existing pattern in the captured image data is actually the respective identification pattern.
  • an authentication is thus carried out in particular ⁇ sondere in that a detection is made that the image data is actually the expected origin, or come from the expected source.
  • a detection is made that the image data is actually the expected origin, or come from the expected source.
  • egg NEN corresponding detection can thus accidental or optionally also targeted fault, for example in the form of Ver ⁇ mix-ups or communication errors can be reliably detected.
  • advantageously takes place at the same time a review of the timeliness of the captured image data so that these ve ⁇ r is within the authentication process.
  • the device according to the invention is advantageous because it allows a reliable authentication of the acquired image data.
  • this also a Au ⁇ authentication runs of the image sensor used for detecting the image data or even of this image sensor is performed umfas ⁇ send device.
  • this is in the area light modulator used, a hardware component which is independent of other components of the device and enables real-time authentication.
  • the device according to the invention is particularly suitable for monitoring security-relevant or safety-critical applications. In the case of applications in the field of railway automation, this relates in particular to fail-safe applications, ie those applications which satisfy the particularly stringent safety requirements of railway operations according to the regulations governing the respective approval authorities.
  • the device according to the invention can be beneficial ⁇ way legally integrated into complex safety-critical applications in a simple way.
  • the device according to the invention can be implemented as a distributed system, so that crizoswei ⁇ se next to a corresponding video camera with the image sensor for detecting the image data also further, remotely located components, such as in the form of a fail-safe control and / or Monitoring device, may be part of the device according to the invention.
  • Another advantage of the device according to the invention is the fact that surface light modulators are tried-and-tested as well as relatively inexpensive components.
  • the use of corresponding spatial light modulators in the inventive manner allows immediate and thus particularly reliable Authen ⁇ tification of the captured image data.
  • These may be, act on the material used to capture the image data of the image sensor in particular, a semiconductor-based or electrostatic ⁇ African image sensor, for example in the form of a CCD or a CMOS sensor.
  • the surface light modulators used in the context of the device according to the invention may in principle be corresponding microelectromechanical components under ⁇ different type and different manufacturers act.
  • the surface light modulator is a digital micromirror device.
  • a digital micromirror device usually a matrix of micro- roaptn or micromirror actuators, where each tiltable reflective surfaces, for example, an edge length may have about 16ym.
  • Each of the micro mirror has two stable this Endzu ⁇ stands between which it can be in its orientation angle with high frequency, which may for example be of the order 5000 Hz, adjust normally.
  • the device according to the invention also ⁇ art may be further developed in that the device is designed, at least to urge the image sensor by a high frequency on and off ⁇ the respective micromirrors of the mecanicnlichtmodu- switch lators so with an identification pattern that even during the authentication - An uninterrupted detection of the actual image data is performed by the image sensor. Because of the high frequency on and off ⁇ the respective micromirrors of the solicitnlichtmodu- switch lators so with an identification pattern that even during the authentication - An uninterrupted detection of the actual image data is performed by the image sensor. Because of the high
  • this can be as representing that for a person who observes the image data on a display device, although, if appropriate, a certain Ver ⁇ darkening of the image can be seen, nevertheless, the illustrated However, image data remains visible
  • the authentication process for the human eye or a corresponding person who may for example be operator and / or surveillance personnel, is not recognizable at all, so that no impairment occurs.
  • the device according to the invention is designed to apply a random identification pattern to the image sensor as part of the authentication process.
  • the term "random" is understood such that the respective identifi cation ⁇ pattern by the image sensor or another, not responsible for the authentication of the image data component is not predictable or
  • any algorithm is suitable which ensures that a random or even targeted manipulation of the acquired image data with sufficiently high probability with respect to the respective application case does not lead to the respective identification pattern.
  • the authentication process can take place in different ways by means of the device according to the invention, depending on the particular application for which the captured image data is used and the respective requirements.
  • the device according to the invention has a signal-technically safe control and / or monitoring device, which is designed to specify the at least one identification pattern , to compare the image data captured by the image sensor with the respective identification pattern, and the authentication of the captured image data, provided that they are consistent with the respective identification pattern.
  • the control of the spatial light modulator rela ⁇ hung as the micromirror can here on the one hand take place directly applicable by the signally safe control and / or monitoring device itself.
  • the respective identifi ⁇ cation pattern identifying information of the fail-safe control and / or monitoring device is transmitted to another component, such as in the form of a light modulator with the area- related control block, and from these Information is passed to the foundednlichtmodul- tor for the purpose of acting on the image sensor with the relevant identification pattern.
  • the use of a fail-safe control and / or monitoring device is advantageous because it makes it possible to carry out a particularly reliable authentication of the image data captured by the image sensor. As a result, a prerequisite is created so that the image data can also be used for safety-relevant or safety-critical applications for which signaling safety is required.
  • the device according to the invention can also be designed such that the device has a signal-technically safe control and / or monitoring device for predetermining the identification pattern and for transmitting information characterizing the identification pattern to a non-secure device , as well as the fail-safe means for receiving the identifying the identification pattern information from the fail-safe control and / or monitoring device, for receiving the captured image data from the image sensor and for authenticating the detected
  • Image data if consistent with the identification pattern.
  • the consistency of the captured image data with the identification pattern can be determined on the one hand by a comparable comparison of the same.
  • the comparison the identification pattern is not as such a basis, son ⁇ countries on the the identification pattern characteristic of information.
  • a statement is ultimately delayedge ⁇ basis as to whether a captured image data in accordance with the respective identification pattern or not.
  • the comparison of the data captured by the image sensor with the respective identification pattern can be made by the non-secure device, whereby, in particular, a realization of the device as a distributed system is facilitated or supported.
  • the non-secure device from the fail-safe control and / or monitoring device captures the identification pattern identifying information.
  • This can either directly define the identification pattern or at least allow it to derive the respective identification pattern in a unique manner, so that the non-secure device is aware of which identification pattern it has to expect in the image data. Concretely, this can for example be such that of the fail-safe control and / or monitoring device a
  • the key is generated and transmitted to the non-secure device ⁇ over. Furthermore, the signal-technically safe control and / or monitoring device generates an identification pattern on the basis of the key and transmits it - indirectly or directly - to the area light modulator for the purpose of acting on the image sensor with this identification pattern .
  • the key can be embodied, for example, as a random string of strings that can not be predicted for other components, for example in the form of a "hash value.” For example, this can be an identification pattern in the form of a "hash value"
  • QR codes are generated. Based on the received key in the form of the hash value, it is now the non-secure institution It is possible to check whether the captured image data contains the associated QR code.
  • a response appropriate to the respective situation takes place. This can be, for example, that a warning message issued or any other action is taken.
  • the latter is designed to switch on previously switched-off micromirrors at the end of the authentication process.
  • the device according to the invention may be white ⁇ ned, and the authentication process at regular time intervals, upon receipt of a Authentifi- z istssignals back and / or depending on the situation fürzuhold- ren.
  • the initiation of the authentication process as well as performing the comparison of the of the image ⁇ Sensor detected image data with the respective identification pattern advantageously caused or performed by a parent component. It is possible, for example, that a tax and / or
  • the device of the invention thus comprises, in addition derjeni ⁇ gen component having the image sensor and the legislativenlichtmo- dulator, ie for example the video camera darü- Beyond that, the control and / or monitoring device of the higher-level safety-relevant system, so that the device is realized in this case as a distributed system.
  • the present invention further relates to a procedural ⁇ ren to authenticate by means of an image sensor of captured image data.
  • the object of the present invention is to provide a method for authenticating image data acquired by means of an image sensor, which enables reliable authentication of the image data acquired by the image sensor.
  • This object is achieved according to the invention by a method for authenticating image data acquired by means of an image sensor, wherein the image sensor is provided in the beam path by selectively switching on and / or off at least one micromirror of a surface light modulator having an array of micromirrors the image sensor are arranged, that exclusively in an on state of the respective micromirror is directed to an associated pixel or pixel region of the image sensor to be detected light is acted upon at least ⁇ an identification pattern, the image data detected by the image sensor with the respective identification pattern and the captured image data are authenticated, provided that they are consistent with the respective identification pattern.
  • the inventive method is designed such that the image ⁇ sensor is acted upon by a high-frequency switching on and off of the relevant micromirror of the surface light modulator with the at least one identification pattern that even during the authentication process an interruption-free detection the actual image data is done by the image sensor.
  • the inventive method may also be such further developed in that the image sensor is thentaimssvorgangs applied in the context of Au with a random ID Case ⁇ onsmuster.
  • the at least one identification pattern is predetermined by a fail-safe control and / or monitoring device
  • the image data captured by the image sensor is transmitted by the fail-safe control and / or monitoring device the respective identification pattern and the captured image data are authenticated by the fail-safe control and / or monitoring device, provided that the image data with the respective identification pattern are consistent.
  • the method according to the invention can also be such that the identification pattern is predetermined by a control and / or monitoring device that is secure in terms of signaling, but from the signal-technically secure control and / or monitoring device, an information identifying the identification pattern to a signaling technology is not provided -safe device is transmitted, by the signal ⁇ technically non-secure device, the captured image data are received by the image sensor and the capturedêtda be authenticated by the fail-safe device, provided that they are consistent with the identification ⁇ pattern.
  • previously deactivated micromirrors are switched on again at the end of the authentication process.
  • the method according to the invention can also be developed in such a way that the authentication process is carried out at regular time intervals, upon receipt of an authentication signal and / or situation-dependent.
  • FIG. 1 shows a schematic sketch of an embodiment of the device according to the invention.
  • a device 1 is shown with an image sensor 10 for acquiring image data.
  • the device 1 further comprises a surface light modulator 20, which in the context of the exemplary embodiment described should be a digital micromirror device.
  • the foundednlichtmo ⁇ dulator 20 has a plurality of arranged in a matrix of micro mirrors of which in the figure six micro-mirrors 21 to 26 are exemplarily shown.
  • gron- the micromirrors NEN this selectively driven and are indi vidually ⁇ rotated by an angle of ⁇ 10-12 °, whereby an on or off of each of the micromirrors is possible 21 to 26.
  • a state is shown, for example, in the 21 and 22 off the micro-mirrors, that are in its flat-out ⁇ off state.
  • incident light from the two micromirrors 21 and 22 is directed to an absorber. over 30 is reflected.
  • the Mik ⁇ rospiegel are shown 23 to 26 in the on state.
  • the device 1 has a first optical lens 40;
  • a second optical lens 50 can be seen, by means of which an image is applied to the image sensor 10.
  • control and / or monitoring device 60 is shown, which is connected by means of a control channel 70 to the surface light modulator 20, whereby the micromirrors 21 to 26 of the surface light modulator 20 of the control and / or monitoring device 60 can be switched on and off selectively and individually.
  • the control and / or monitoring device 60 preferably comprises both hardware components, such as in the form of a
  • a communication channel 80 is shown, which connects the image sensor 10 with the control and / or monitoring device 60.
  • the image sensor 10 is part of a video camera.
  • a imaged by the video camera or image to be captured is in this case 100 so imaged on the image sensor 10 that are detected by means 110 of the image sensor 10, a entspre ⁇ fair view or image data.
  • the image sensor 10 is a semiconductor-based image sensor in CCD or CMOS technology.
  • the beam path 120 is thus represented in such a way that light detected by the device 1 by means of the first optical lens 40 passes through the micromirrors 23 to 26 via the two - te optical lens 50 is directed to an associated pixel or pixel ⁇ range of the image sensor 10.
  • a corresponding re ⁇ inflected light beam of the figure is identified by the reference numeral 125.
  • the exact association between the individual micromirrors 21 to 26 and the pixels of the image sensor 10 depends in particular on the resolution of both the area light modulator 20 and the image sensor 10. On the one hand, it is thus possible that exactly one pixel of the image sensor 10 is assigned to each micromirror 21 to 26 of the surface light modulator 20. Alter ⁇ natively for this purpose, it is also conceivable that by means of the Mikrospie ⁇ gel 21 to 26 each have a plurality of pixels of the image sensor 10 are lit out ⁇ .
  • the situation may be that in the event that the image sensor 10 has a smaller up-solution than the surface light modulator 20 a plurality of micro mirrors are supplied ⁇ assigns 21 to 26 the same pixel of the image sensor 10th Regardless thereof, the beam path in the case of an off micromirror 21, 22 in the form shown in phantom in the figure and designated by the reference numeral 130 is such that incident light is directed by the off micromirrors 21, 22 on the absorber 30, which the figure is indicated by a corresponding light beam 135. This means that in this case the one or more pixels of the image sensor 10 assigned to the micromirrors 21, 22 are not illuminated, which is also referred to as "darkened" in the context of the present description.
  • the image sensor 10 is acted upon by selectively switching on and / or off of at least one of the micromirrors 21 to 26 with at least one identification pattern.
  • a dynamic change can be made as part of a authentication process over time, for example, the off micromirrors 21 and 22 on and at least one or all of the switched micromirror off 23 to 26 who ⁇ .
  • the image data 110 captured by the image sensor 10 are now compared by the device 1 with the respective identification pattern. This means that for those pixels or pixel areas of the image sensor 10 that are associated with such micromirrors 21 and 22 of the area light modulator 20 that are switched off according to the respective identification pattern, a corresponding darkening is expected, with a check both with regard to darkening as such, as well as in relation to an expected reaction time is possible.
  • the corresponding comparison can be made, for example, by the control and / or monitoring device 60, in which case it receives the image data 110 captured by the image sensor 10 via the communication channel 80.
  • Advantage ⁇ way legally can control and / or monitoring Device 60 in this case be executed as a signal-technically secure component, whereby a particularly high reliability of the authentication process is ensured.
  • the comparison of the image data 110 captured by the image sensor 10 to the respective identification pattern can also Runaway of a further, not shown in the figure, possibly non-secure component ⁇ leads. What is essential here is merely that the image component 110 captured by the image sensor 10 is available to the component concerned and the respective identification pattern or information characterizing this identification pattern is known. Based on the comparison of the detected by the image sensor 10
  • Image data 110 with the respective identification pattern it is advantageously possible to perform an authentication of the captured image data 110.
  • the prerequisite for this is that the captured image data 110 are consistent with the respective identification pattern.
  • Consistent is here expressed in that deviate ⁇ deviations between the detected image data 110 and the respective identification pattern in a certain degree or extent may be to the effect acceptable that they egg not prevent ne successful authentication of the image data.
  • possible pixel defects can be taken into account by the fact that, in order to authenticate only with respect to a specific proportion of the pixels, which can be 95%, for example, a match with the respective identification pattern is required.
  • a Authenti ⁇ cation of the image data 110 is carried out to the effect that it is ensured in the event that the image data with the respective identification patterns are consistent, that the image data 110 in fact assisted by the identification pattern
  • the image sensor 10 by a high-frequency input and Power off ⁇ th of the respective micro-mirrors, that is, for example, the micro-mirrors 21 and 22, in such a way with the at least to apply a Iden ⁇ t Schemesmuster that even during the authentication process a interruption-free detection of the actual image data 110 by the image sensor 10 takes place.
  • the degree of darkening of the pixels or pixel areas of the image sensor 10 supplied by the respective micromirrors 21 to 26 can be determined by the frequency as well as the pulse width of switching the respective micromirrors 21 to 26 on and off.
  • the authentication process can be carried out by the device 1, preferably at regular time intervals, upon receipt of an authentication signal and / or depending on the situation.
  • the device 1 is implemented as a distributed system in that, for example, the control and / or monitoring device 60 with respect to parts of their functionality or even completely not part of the relevant image acquisition system, ie, for example corresponding video camera, is.
  • the control and / or monitoring device 60 may be implemented wholly or partially as a component of a higher-level safety-relevant system. In the case of a railway automation system, this can be, for example, a fail-safe computer of a control and / or control system.
  • the image sensor 10 can be acted upon with arbitrary identification patterns by means of the surface light modulator 20, whereby advantageously the function of the image sensor 10 is not or only insignificantly impaired, so that an authentication of the captured image data 110 can preferably also take place during operation of the image sensor 10.
  • the spatial light modulator 20 is a hardware component that from the remaining components, that is, for example, the image sensor 10, is largely independent, so that arise in particular for safety-critical applications and function ⁇ ones advantages.
  • an immediate authentication of the image data 110 is advantageously made possible, whereby possible sources of error are excluded in alternative scenarios.
  • the identification pattern can advantageously also be used for other purposes.
  • the image data 110 acquired by the image sensor 10 are displayed on a display device and an acknowledgment action of an operator is requested with the identification pattern.
  • This can, for example, so ge ⁇ Schehen that the operator in the case of a display device in the form of a touch screen makes a related to the being displayed ⁇ th identification pattern input relationship ⁇ example confirms the acknowledgment of the identification pattern.
  • the identification pattern also several For example, in order to check the operator's attention, two “wrong” and one “correct” selection options can be offered Alternatively, the identification pattern may also be provided in the form of a “captcha "(Completely Automated Pub ⁇ lic Turing test to part Computers and Humans Apart) be out ⁇ leads to ensure a targeted confirmation by an operator.
  • the area light modulator 20 can additionally be used to make a selective limiting of the incident light, ie a selective dimming, in cases of a present overexposure.
  • a selective limiting of the incident light ie a selective dimming
  • the degree of darkening on a variation of the pulse width ratio between the on and off scarf ⁇ ended state can be flexibly adapted to the particular requirement Bezie ⁇ hung, respective environmental conditions even in this case.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Mechanical Engineering (AREA)
  • Image Input (AREA)

Abstract

L'invention concerne un dispositif (1) comportant un capteur d'image (10) pour acquérir des données d'image (110). L'objectif de l'invention est d'authentifier les données d'image (110) acquises au moyen dudit capteur d'images. A cette fin, le dispositif (1) comporte un modulateur de lumière de surface (20) présentant une matrice de micro-miroirs (21 à 26) agencés dans la trajectoire du faisceau (120, 130) avant le capteur d'image (10) de telle sorte que la lumière (100) détectée par le dispositif (1) est exclusivement dirigée, à l'état activé du micro-miroir correspondant (23 à 26), sur un pixel ou une zone de pixels associé(e) du capteur d'image (10). En outre, dans le cadre d'un processus d'authentification, le dispositif (1) est conçu pour soumettre le capteur d'image (10) à au moins un motif d'identification, par activation et/ou désactivation sélective d'au moins un des micro-miroirs (21 à 26), pour comparer les données d'image (110) acquises par le capteur d'image (10) au motif d'identification correspondant, et pour authentifier les données d'image (110) acquises, dans le cas où ces dernières correspondent audit motif d'identification. L'invention concerne en outre un procédé pour authentifier des données d'image (110) acquises au moyen d'un capteur d'images (10).
PCT/EP2017/050774 2016-02-16 2017-01-16 Dispositif comprenant un capteur d'image pour acquérir des données d'image et procédé pour authentifier des données d'image acquises au moyen d'un capteur d'images Ceased WO2017140445A1 (fr)

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DE102016202345.4 2016-02-16
DE102016202345.4A DE102016202345A1 (de) 2016-02-16 2016-02-16 Vorrichtung mit einem Bildsensor zum Erfassen von Bilddaten sowie Verfahren zum Authentifizieren mittels eines Bildsensors erfasster Bilddaten

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WO2017140445A1 true WO2017140445A1 (fr) 2017-08-24

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