Liveness detection module, device, system and method

Abstract

The present disclosure provides a living body detection device and a related verification method. The living body detection device includes a light emitting unit, an image sensing unit, and a data processing module. The substrate of the light emitting unit has a first inclined surface, and the emitted light is reflected light of the first inclined surface. The present disclosure triggers a verification process through an application program to verify a user. The light emitting unit emits light with a specific pattern within a specific period to generate a plurality of image signals. The present disclosure generates a plurality of living body detection signals for judging a living body, wherein the present disclosure calculates each light interference pattern from at least one sequential image signal to generate the plurality of living body detection signals. When the living body score of the plurality of living body detection signals reaches a living body threshold, the present disclosure further generates feature recognition data for matching, wherein the feature recognition data is generated from the calculation of each interference pattern from at least one sequential image signal. Then, the present disclosure compares the feature recognition data and the previously registered data to lock or unlock the living body detection device and / or the system coupled thereto.

Description

Technical Field

[0001] This disclosure relates to biological liveness detection and fraud detection, and more particularly to a liveness detection module, apparatus, system, and method for performing biological liveness detection and fraud detection based on multiple images captured by a camera. Background Technology

[0002] Biometric technology uses a person's unique biometric features to verify an individual's identity. The advantages of biometric authentication systems include high security and the indispensability of biometric data. However, biometric authentication is vulnerable to "image attacks" involving spoofing, which attempt to defeat biometric verification or recognition procedures. The methods of image attacks vary depending on the biometric modality; that is, the methods of image attacks depend on whether the biometric technology uses fingerprints, faces, irises, voice, or any possible keystroke.

[0003] While biometric authentication systems using multiple biometric modalities are relatively difficult to scam, scammers can still use different techniques to exploit each modality individually. Therefore, biometric authentication mechanisms need to be capable of detecting scams and also need to be able to counter other types of image attacks targeting biometric modalities.

[0004] Liveness detection is not only effective for biometric authentication but can also be used to identify fraud. Biometric authentication verifies whether a user is an authorized user of the system. In practical applications, biometric fraud (i.e., liveness detection) can be used as part of the onboarding process to verify that the authorized user is indeed a real person.

[0005] Liveness detection is a technology used to detect biometric fraud, determining whether a biological sample originates from a living human or is a fake. Liveness detection involves analyzing and processing collected biological sample data to determine whether the sample comes from a living person or a counterfeit.

[0006] Liveness detection can be broadly categorized into two types: active and passive. Active liveness detection involves an authorized user performing an action that is difficult to replicate through fraud. It can also incorporate biometric modalities, such as biometric key feature analysis or speaker identification. Voice recognition analyzes mouth movements to determine liveness. Passive liveness detection, on the other hand, uses algorithms to detect indicators or features in non-real-time images without requiring interaction with the user. Experiments have shown that capturing high-quality biometric data during the verification process helps improve the performance of feature matching and liveness detection algorithms. Nevertheless, "image attacks" like those used for fraud remain a challenge for biometric verification. For example, with facial recognition biometrics, fraudsters can use "masks" manufactured by 3D printers. In another example, with fingerprint recognition biometrics, fraudsters can use forged fingerprints made of silicone. Summary of the Invention

[0007] Therefore, to address the aforementioned deficiencies, this disclosure provides an image capturing system comprising a motherboard, a light-emitting unit, an image sensing unit, and a data processing module. The light-emitting unit is electrically connected to the motherboard and includes a laser unit and a first optical module. The laser unit emits light with an output power exceeding twenty milliwatts, and the first optical module transmits the emitted light from the light-emitting unit. The image sensing unit is electrically connected to the motherboard adjacent to the light-emitting unit and includes a second optical module and an image sensing module. The second optical module captures passing images. The image sensing module generates multiple image signals from the captured images. The data processing module is electrically connected to the motherboard adjacent to the light source and the image sensing unit and generates multiple liveness detection signals from the multiple image signals of the captured images. The laser unit includes a substrate having a side surface and a first inclined surface; a conductive layer formed on the side surface and the first inclined surface; and a laser light source. The laser light source is electrically connected to the conductive layer formed on the side surface. The light emitted by the light-emitting unit of the first optical module is the reflected light of the conductive layer formed on the first inclined surface.

[0008] In some embodiments, the included angle between the side surface and the first inclined surface is between 25 degrees and 75 degrees.

[0009] This disclosure provides design flexibility for the configuration of the emitted light of the light-emitting unit through the first optical module of the image capturing system, using the included angle. For example, this disclosure allows for different optical structures to be constructed by changing the size of the included angle (e.g., adjusting the tilt angle by adjusting the size of the hypotenuse and the vertical side), enabling the light-emitting unit within the image capturing system to achieve the same target emission area.

[0010] In some embodiments, the conductive layer is made of at least one of gold (Au), silver (Ag), copper (Cu), nickel (Ni), titanium (Ti), and tungsten (W), or any combination thereof, thereby providing design flexibility in the conductivity and reflectivity of the conductive layer.

[0011] The conductive layer is formed on the side surface and the first inclined surface to reduce the absorption of the emitted light from the light-emitting unit when it is reflected. Furthermore, the laser light source electrically connected to the conductive layer and the circuitry of the image capturing system coupled to the laser light source can dissipate heat through the thermal conductivity of the conductive layer.

[0012] In some embodiments, the data processing module is used to generate the plurality of liveness detection signals from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

[0013] The liveness detection data is generated from each liveness detection signal in at least one sequential image signal, wherein each sequential image signal includes a different image signal. This disclosure generates the multiple image signals of the multiple captured images by adjusting the on / off state and timing of the laser light source, and further processes each liveness detection signal to include a preset number, thereby improving the signal-to-noise ratio of the image capturing system and reducing the amount of ambient light received.

[0014] In some embodiments, the data processing module is used to generate the feature identification data from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

[0015] The feature identification data is generated from at least one sequential image signal, wherein each sequential image signal includes a different image signal; this disclosure generates the multiple image signals of the multiple captured images by adjusting the on / off state and timing of the laser light source, and further processes each image signal including a default number, which can reduce the amount of ambient light received and improve the signal-to-noise ratio of the image capturing system.

[0016] In some embodiments, the laser unit is an edge-emitting laser unit with a coherence length of less than 30 centimeters.

[0017] This disclosure utilizes an edge-emitting laser unit to provide high output power and a longer coherence length. High output power enhances the contrast between the live subject and the surrounding environment, thereby improving liveness detection and feature recognition performance. The edge-emitting laser unit is electrically connected to the conductive layer formed on the side surface, and by selecting an appropriate inner angle, the thickness of the light-emitting unit in the image acquisition system can be reduced.

[0018] In some embodiments, the image sensing module includes at least one of a complementary metal oxide semiconductor (CMOS) array, a charge coupled device (CDD) array, and a photodiode (PD) array.

[0019] In one embodiment, this disclosure provides an image capturing apparatus, including an image capturing system and a display. The image capturing system of the image capturing apparatus includes a motherboard, a light-emitting unit, an image sensing unit, and a data processing module. The light-emitting unit is electrically connected to the motherboard and has a laser unit and a first optical module. The laser unit is used to emit emitted light with an output power exceeding twenty milliwatts. The first optical module is used to transmit the emitted light from the light-emitting unit. The image sensing unit is electrically connected to the motherboard adjacent to the light-emitting unit and has a second optical module and an image sensing module. The second optical module is used to capture passing images. The image sensing module is used to generate multiple image signals from the multiple captured images. The data processing module is electrically connected to the motherboard adjacent to the light source and the image sensing unit, and is used to generate multiple liveness detection signals and feature recognition data from the multiple image signals of the multiple captured images. The laser unit includes a substrate having a side surface and a first inclined surface; a conductive layer formed on the side surface and the first inclined surface; and a laser light source. The laser light source is electrically connected to the conductive layer formed on the side surface. The light emitted by the light-emitting unit of the first optical module is reflected light from the conductive layer formed on the first inclined surface. The display device is coupled to the image capturing system to display the multiple captured images from the image sensing unit.

[0020] In some embodiments, the included angle between the side surface and the first inclined surface of the image capturing system of the image capturing device is between 25 degrees and 75 degrees.

[0021] In some embodiments, the conductive layer of the image capturing system of the image capturing device is made of at least one of gold, silver, copper, nickel, titanium and tungsten or any combination of the above elements.

[0022] In some embodiments, the data processing module of the image capturing system of the image capturing device is used to generate multiple liveness detection signals from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

[0023] In some embodiments, the data processing module of the image capturing system of the image capturing device is used to generate feature identification data from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

[0024] In some embodiments, the laser unit is an edge-emitting laser unit with a coherence length of less than 30 centimeters.

[0025] In some embodiments, the image sensing module of the image capturing system of the image capturing device includes at least one of a complementary metal-oxide-semiconductor array, a charge-coupled device array, or a photodiode array.

[0026] In one embodiment, this disclosure provides a method for capturing images using an image capturing device. The method includes capturing and generating multiple image signals, generating multiple liveness detection signals from the multiple image signals, generating liveness detection data and a liveness score, and determining whether the liveness score exceeds a liveness threshold to verify the user or lock the image capturing device. The method includes emitting light with an output power exceeding 20 milliwatts to a target via a first optical path through a light-emitting unit; capturing multiple images via an image sensing unit and transmitting the multiple images to an image sensing module via a second optical path; instructing the image sensing unit to generate the multiple captured images via the image capturing device; generating multiple image signals of the multiple captured images via the image sensing module of the image sensing unit; processing the multiple image signals of the multiple captured images via a data processing module to generate multiple liveness detection signals; processing the multiple liveness detection signals via the data processing module to generate liveness detection data; comparing the liveness detection data with data in a database via the data processing module to generate a liveness score; and determining whether the liveness score exceeds a liveness threshold via the data processing module; if yes, authenticating the user's use of the image capturing device or further processing the multiple image signals; if no, locking the image capturing device.

[0027] In some embodiments of the method for capturing images, the laser unit of the light-emitting unit of the image capturing apparatus emits emitted light having an output power exceeding twenty milliwatts and transmits the emitted light to the target via a first optical path. In the method for capturing images, the laser unit of the image capturing apparatus includes a substrate having a side surface and a first inclined surface; a conductive layer formed on the side surface and the first inclined surface; and a laser light source. The laser light source is electrically connected to the conductive layer formed on the side surface. The emitted light emitted to the target via the first optical path is reflected light from the conductive layer formed on the first inclined surface. In some embodiments of the method for capturing images, the included angle between the side surface and the first inclined surface is between 25 degrees and 75 degrees.

[0028] In some embodiments of the method for capturing images, the conductive layer of the image capturing system of the image capturing device is made of at least one of gold, silver, copper, nickel, titanium and tungsten or any combination of the above elements.

[0029] In some embodiments of the method for capturing images, the step of generating the plurality of liveness detection signals includes generating the plurality of liveness detection signals from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

[0030] In some embodiments of the method for capturing images, when it is determined that the liveness score exceeds the liveness threshold, the step of further processing the plurality of image signals further includes: generating feature identification data through the data processing module; comparing the feature identification data with data in the database through the data processing module to generate a matching score; comparing the matching score with the unlocking threshold of the image capturing device through the data processing module; and determining through the data processing module whether the matching score exceeds the unlocking threshold; if yes, then authenticating the user to use the image capturing device or further processing the plurality of image signals; if no, then locking the image capturing device.

[0031] In a particular embodiment of the method for capturing images, the step of generating the feature identification data includes generating the feature identification data from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

[0032] In some embodiments of the method for capturing images, the laser unit is an edge-emitting laser unit with a coherence length of less than 30 centimeters.

[0033] In some embodiments of the method for capturing images, the image sensing module includes at least one of a complementary metal-oxide-semiconductor array, a charge-coupled device array, or a photodiode array. Attached Figure Description

[0034] The following detailed description of embodiments, in conjunction with the accompanying drawings, is provided. However, the specific embodiments described are merely illustrative and not intended to limit the scope of this disclosure. The description of the structural operations is not intended to restrict the order of their execution, and all devices with equivalent functionality are within the scope of this disclosure. For ease of understanding, similar elements in the following figures will be designated with the same symbols.

[0035] Figure 1A This is a schematic diagram of an imaging module according to an embodiment of the present disclosure.

[0036] Figure 1B According to the embodiments disclosed herein Figure 1A The imaging module is shown in the cross-sectional view of line segment AA.

[0037] Figure 2 This is a partial cross-sectional view of an imaging module according to an alternative embodiment of this disclosure.

[0038] Figure 3 This is a partial schematic diagram of an image capturing apparatus according to an embodiment of the present disclosure.

[0039] Figure 4 This is a partial schematic diagram of an image capturing apparatus according to an alternative embodiment of the present disclosure.

[0040] Figure 5 This is a partial cross-sectional view of the packaging structure of the laser light-emitting unit according to an embodiment of the present disclosure.

[0041] Figure 6 This is a partial cross-sectional view of the packaging structure of the laser light-emitting unit according to an alternative embodiment of the present disclosure.

[0042] Figure 7 This is a partial cross-sectional view of the packaging structure of a laser light-emitting unit according to another alternative embodiment of this disclosure.

[0043] Figure 8 This is a partial cross-sectional view of the packaging structure of a laser light-emitting unit according to another alternative embodiment of the present disclosure.

[0044] Figure 9 This is a schematic diagram of a laser light-emitting unit emitting co-modulated light according to an embodiment of the present disclosure.

[0045] Figure 10 This is a schematic diagram of a laser light-emitting unit emitting co-modulated light according to an embodiment of the present disclosure.

[0046] Figure 11 This is a schematic diagram of a laser light-emitting unit emitting co-modulated light according to an embodiment of the present disclosure.

[0047] Figure 12A A photograph of a user's hand features according to an embodiment of this disclosure.

[0048] Figure 12B According to the embodiments disclosed herein Figure 12A The photo shows a magnified view of the user's index finger and thumb.

[0049] Figure 13 This is a timing diagram of an optical pulse according to an embodiment of the present disclosure.

[0050] Figure 14 This is a timing diagram of the received amounts of light pulses and ambient light according to an alternative embodiment of this disclosure.

[0051] Figure 15 This is a timing diagram of the received amounts of light pulses and ambient light according to another alternative embodiment of this disclosure.

[0052] Figure 16 This is a timing diagram of the received amounts of light pulses and ambient light according to another alternative embodiment of this disclosure.

[0053] Figure 17This is a timing diagram of the received amounts of light pulses and ambient light according to yet another alternative embodiment of the present disclosure.

[0054] Figure 18 This is a schematic diagram of a laser light-emitting unit emitting coherent light via a diffuser and a lens according to an embodiment of this disclosure.

[0055] Figure 19 This is a partial cross-sectional view of the packaging structure of a laser light-emitting unit according to another alternative embodiment of this disclosure.

[0056] Figure 20 This is a schematic diagram of an image capturing apparatus according to an embodiment of the present disclosure.

[0057] Figure 21 This is a schematic diagram of an image capturing apparatus according to an alternative embodiment of the present disclosure.

[0058] Figure 22 This is a schematic diagram illustrating the capture of an image of subepidermal features of a user's face according to an embodiment of this disclosure.

[0059] Figure 23 This is a flowchart of the liveness detection and verification process according to an embodiment of this disclosure.

[0060] Figure 24 This is a component flowchart of a liveness detection and verification process according to an embodiment of the present disclosure.

[0061] Figure 25A This is a schematic diagram of the features of an infrared light-shielding material wrapped around the middle finger of a user's hand according to an embodiment of this disclosure.

[0062] Figure 25B According to the embodiments disclosed herein Figure 25A An illustration of the feature of infrared light-blocking material wrapped around the middle finger of a user's hand.

[0063] Figure 25C According to the embodiments disclosed herein Figure 25A A diagram illustrating the live signal of infrared light-blocking material wrapped around the middle finger of the user's hand.

[0064] Figure 26A This is a schematic diagram of a photograph showing the features of a user's face according to an embodiment of this disclosure.

[0065] Figure 26B According to the embodiments disclosed herein Figure 26A A diagram illustrating the liveness signal of a user's face.

[0066] Figure 26C According to the embodiments disclosed herein Figure 26A An illustration of the subcutaneous features of a user's face. Detailed Implementation

[0067] The following will illustrate the implementation principles related to biological liveness detection and fraud detection through specific embodiments of liveness detection and feature recognition, and explain the implementation concepts of the liveness detection system, apparatus, and method provided in this disclosure, including the imaging module, image acquisition system, and image acquisition device, through examples. Specifically, the implementation principles of this disclosure include an image sensing unit, a light-emitting unit, and a data processing module, a liveness detection and feature recognition method, and any combination thereof from the prior art. Nevertheless, those skilled in the art can make modifications or variations based on one or more implementation principles of this disclosure to implement the image sensing unit, light-emitting unit, and data processing module, as well as the liveness detection and feature recognition method of this disclosure, thereby achieving corresponding results, features, and / or performance.

[0068] Therefore, even if the features differ from the specific examples discussed herein, any image sensing unit, light-emitting unit, data processing module, and method for liveness detection and feature recognition that conforms to one or more of the principles of this disclosure falls within the scope of this disclosure. Accordingly, those skilled in the art, after understanding the implementation methods of the image sensing unit, light-emitting unit, data processing module, and method for liveness detection and feature recognition disclosed herein, can modify and alter the techniques taught in this disclosure without departing from the spirit and scope of this disclosure.

[0069] Various units, circuits, or other components can be "used" to perform one or more tasks. In this document, "used" refers broadly to the operational function of performing one or more tasks through a circuit system comprising multiple circuits. For example, the aforementioned units, circuits, or other components can be used to perform tasks even if some components in the circuit system are not activated. Generally, a circuit structure composed of hardware circuits and / or memory can be used to execute multiple instructions defined within an instruction set architecture to perform one or more operational functions. The aforementioned memory can be volatile memory, such as static random access memory (DRAM) or dynamic random access memory (DRAM), and / or non-volatile memory, such as optical disc or magnetic disk storage, flash memory, programmable read-only memory, etc.

[0070] As can be conceived of in the exemplary embodiments disclosed herein, a business entity or individual may selectively restrict the use or access to business entity data or personal data, respectively. That is, hardware and / or software components may be used to prevent or avoid the reading of business entity data or personal data, respectively.

[0071] This disclosure provides an image capturing system 130, which includes a motherboard 190, a light-emitting unit 160, an image sensing unit 140, and a data processing module 180. Figure 1A This is a schematic diagram of a module including an integrated circuit according to an embodiment of the present disclosure. Figure 1B In accordance with the embodiments disclosed herein Figure 1A The module is shown in the cross-sectional view of line segment AA. Figure 2 This is a schematic diagram of a partial cross-section of a module including an integrated circuit according to an alternative embodiment of this disclosure. Figure 3 This is a partial schematic diagram of an image capturing device 100 having an imaging module including an integrated circuit 180 according to an embodiment of the present disclosure. Figure 4 This is a partial schematic diagram of an image capturing apparatus 100 having an imaging module including an integrated circuit 180 and multiple elements according to an alternative embodiment of this disclosure. Please refer to... Figures 1A to 4 The light-emitting unit 160 is electrically connected to the motherboard 190 (e.g., Figure 1A As shown), and has a laser unit 168 and a first optical module 165 (as shown). Figure 1B (As shown). The laser unit 168 is used to emit emitted light with an output power exceeding twenty milliwatts, and the first optical module 165 is used to transmit the emitted light from the light-emitting unit 160. In some embodiments, the laser unit 168 may be a near-infrared (NIR) light source, but this disclosure is not limited thereto. Common laser light sources in the art are applicable to the embodiments disclosed herein, such as distributed feedback (DFB) laser light, distributed bragg reflector (DBR) laser light, Fabry-Perot laser light, or any combination of light-emitting diodes, etc. The laser unit 168 may be implemented by a combination of one or more non-infrared light sources. Those skilled in the art can implement the laser unit according to actual application requirements, but this disclosure is not limited thereto. For example, the laser unit 168 may emit emitted light with a wavelength range between 700 nanometers and 1000 nanometers in a total emission time between 0.1 milliseconds and 500 milliseconds, having a continuous wave (CW), pulsed wave, or a combination of the above waveforms, but this disclosure is not limited thereto. The image sensing unit 140 is electrically connected to the motherboard 190 near the light-emitting unit 160 (e.g., Figure 1A As shown), and has a second optical module 145 and an image sensing module 142 (as shown). Figure 1B(As shown). The second optical module 145 is used to capture the passing images. The image sensing module 142 is used to generate multiple image signals of multiple captured images. The multiple captured images may include, for example, still images, recorded images, and / or frame-by-frame images. The data processing module 180 is electrically connected to the motherboard 190 and the image sensing units 160 and 140 near the light source, and is used to generate multiple liveness detection signals of multiple image signals of multiple captured images. For example, in a particular embodiment, the data processing module 180 includes circuitry for executing multiple instructions defined within an instruction set architecture, such as an application-specific integrated circuit (ASIC). It will be readily understood that the data processing module 180 may include other chips, circuits, or combinations thereof for performing the relevant data processing tasks required by the data processing module 180; however, this disclosure is not limited thereto. Figure 2 As shown, the laser unit 168 includes a substrate 161, a conductive layer 150, and a laser light source 162. The substrate 161 has a side surface 167 and a first inclined surface 164a, the first inclined surface 164a extending from the side surface 167. The conductive layer 150 is formed on the side surface 167 and the first inclined surface 164a. The laser light source 162 is electrically connected to the conductive layer 150 formed on the side surface 167. The emitted light from the light-emitting unit 160 is reflected by the conductive layer 150 formed on the first inclined surface 164a via a first optical module 165. In some embodiments, the laser unit 168 further includes a housing 163 surrounding the substrate 161, the conductive layer 150, and the laser light source 162.

[0072] In some embodiments, the image sensing module 142 includes at least one of a complementary metal oxide semiconductor (CMOS) array, a charge-coupled device (CDD) array, and a photodiode (PD) array. The image sensing module 142 may include a sensing array of 2x2 to 999x999 sensing elements, and can sense black-and-white or color images. The focal ratio (f-number, f / #) of the second optical module 145 is, for example, a value greater than three.

[0073] In some embodiments, the image sensing module 142 has multiple sensing module lines 149 for electrically connecting the image sensing module 142 to the motherboard 190. In some embodiments, the laser unit 168 has multiple laser unit lines 169 for electrically connecting the laser light source 162 to the motherboard 190.

[0074] In a particular embodiment, the motherboard 190 has a plurality of connectors 194 for connecting electronic circuitry to other circuitry, parts, or components. For example, but not limited to, the motherboard 190 may be a flexible printed circuit board (FPCB) with multiple board-to-board connectors. It is readily understood that the motherboard 190 can connect its own electronic circuitry to other circuitry, parts, or components in any known manner, such as quad flat no-lead (QFN) package pins, PCB gold fingers, etc., however, this disclosure is not limited thereto. In a particular embodiment, the motherboard 190 may not be a flexible printed circuit board, and the motherboard 190 may have a plurality of solder bumps 196 for connecting its own electronic circuitry to other circuitry, parts, or components.

[0075] In some embodiments, the substrate 161 of the laser unit 168 includes a second inclined surface 164b, wherein the second inclined surface 164b extends from the side surface 167 and is relative to the first inclined surface 164a, the first inclined surface 164a and the second inclined surface 164b are adjacent to an edge surface 166, the edge surface 166 being relative to the side surface 167. In a particular embodiment, the edge surface 166 completely supports the first optical module 165. In a particular embodiment, the edge surface 166 may partially support or not support the first optical module 165. However, this disclosure does not limit the support structure of the edge surface 166, as long as the emitted light via the light-emitting unit 160 of the first optical module 165 is reflected light from the conductive layer 150 formed on the first inclined surface 164a, it falls within the scope of this disclosure.

[0076] Figure 5 This is a partial cross-sectional view of the packaging structure of the laser light-emitting unit according to an embodiment of the present disclosure. Figure 6 This is a partial cross-sectional view of the packaging structure of the laser light-emitting unit according to an alternative embodiment of the present disclosure. Figure 7 This is a partial cross-sectional view of the packaging structure of a laser light-emitting unit according to another alternative embodiment of this disclosure. Figure 8 This is a partial cross-sectional view of the packaging structure of a laser light-emitting unit according to another alternative embodiment of this disclosure. Please refer to... Figures 5 to 8 and reference Figures 1A to 4 In some embodiments, a partial cross-sectional view of the packaging structure includes substrates 261, 361, 561, and 661, laser light sources 262, 362, 562, and 662, and conductive layers 250, 350, 550, and 650. The laser units also include side surfaces 267, 367, 567, and 667 and first inclined surfaces 264a, 364a, 564a, and 664a, wherein multiple first inclined surfaces 264a, 364a, 564a, and 664a extend from side surfaces 267, 367, 567, and 667, respectively. In alternative embodiments, such as... Figure 6As shown, the substrate 361 of the light-emitting unit further includes a second inclined surface 364b, wherein the second inclined surface 364b extends from the side surface 367 and is opposite to the first inclined surface 364a. The first inclined surfaces 264a, 364a, 564a, 664a and the second inclined surface 364b respectively include edge surfaces 266, 366, 566, 666 opposite to the side surfaces 267, 367, 567, 667.

[0077] In some embodiments, the included angles between the side surfaces 267, 367, 567, 667 and the first inclined surfaces 264a, 364a, 564a, 664a are respectively between 25 degrees and 75 degrees. Figure 5 This embodiment and Figure 6 In an alternative embodiment, the included angles between the side surfaces 267, 367 and the first inclined surfaces 264a, 364a are each 45 degrees. Figure 7 In another alternative embodiment, the included angle between the side surface 567 and the first inclined surface 564a is less than 45 degrees. Figure 8 In another alternative embodiment, the included angle between the side surface 667 and the first inclined surface 664a is greater than 45 degrees. In a particular embodiment, the length of the hypotenuse corresponding to the included angle θ can be different, meaning that those skilled in the art can adjust the lengths of the first inclined surfaces 264a, 364a, 564a, and 664a according to application requirements; however, this disclosure is not limited thereto. In a particular embodiment, the lengths of the first inclined surfaces 264a, 364a, 564a, and 664a corresponding to the included angle θ are all the same. However, this disclosure does not limit the lengths of the first inclined surfaces 264a, 364a, 564a, and 664a, as long as the emitted light from the light-emitting unit 160 of the first optical module 165 is reflected light from the conductive layer 150 formed on the first inclined surface 164a, it falls within the scope of this disclosure.

[0078] This disclosure provides design flexibility for configuring the emitted light of the light-emitting unit through the first optical module of the image capturing system. For example, this disclosure allows for different optical structures to be constructed by changing the size of the inner angle (e.g., adjusting the tilt angle by adjusting the size of the hypotenuse and the vertical side), enabling the light-emitting units within the image capturing system to achieve the same target emission area.

[0079] In some embodiments, the conductive layer 150 is made of at least one of gold (Au), silver (Ag), copper (Cu), nickel (Ni), titanium (Ti), and tungsten (W), or any combination thereof, thereby providing design flexibility in the conductivity and reflectivity of the conductive layer 150.

[0080] A conductive layer is formed on the side surface and the first inclined surface to reduce the absorption of light emitted by the light-emitting unit when it is reflected. Furthermore, the laser light source electrically connected to the conductive layer and the circuitry of the image capturing system coupled to the laser light source can dissipate heat through the thermal conductivity of the conductive layer.

[0081] In some embodiments, the laser light source 162 is an edge-emitting laser unit with a coherence length of less than 30 centimeters.

[0082] This disclosure utilizes edge-emitting laser light, providing a single light source with high output power and design flexibility with a long coherence length. Figure 9 This is a schematic diagram of a laser light-emitting unit (e.g., laser diode chip 191) emitting co-modulated light 172 according to an embodiment of this disclosure. Figure 10 This is a schematic diagram of a laser light-emitting unit (e.g., laser diode chip 193) emitting co-modulated light 174 according to an embodiment of this disclosure. Figure 11 This is a schematic diagram illustrating the emission of co-modulated light 176 by a laser light-emitting unit (e.g., laser diode chip 195) according to an embodiment of this disclosure. Please refer to... Figures 9 to 11 and reference Figures 1A to 8 Multiple laser light-emitting units 191, 193, and 195 can emit coherent light 172, 174, and 176 to the target 179, respectively, enabling multiple detectors 194 and 196 to detect the reflected light 177 and 175 from the target 179. Coherence is a unique characteristic of laser light radiation during the emission process. Temporal coherence and spatial coherence can be used to describe the coherence characteristics of light. Coherence length (Lcoh) can be used to describe temporal coherence; specifically, coherence length Lcoh describes the distance over which the laser beam maintains coherence beyond the propagation distance. Spatial coherence or lateral coherence of the laser beam describes the correlation between multiple phases of the light field in one direction. The magnitude of coherence length Lcoh is related to the divergence (φ) of the beam at the point of irradiation. In a configuration of multiple light sources, the size of the emission region can be larger than one wavelength. Experiments have shown that a speckle is a dotted pattern that appears when laser light is incident on a non-specular reflective surface. Figure 12A A photograph of a user's hand features according to an embodiment of this disclosure. Figure 12B According to the embodiments disclosed herein Figure 12A The photo shows a magnified view of the user's index finger and thumb. Please refer to it. Figure 12A and Figure 12B and reference Figures 1A to 11 When a large number of elementary waves interfere with each other, light spot patterns will appear.

[0083] This disclosure utilizes high-output-power edge-emitting laser light to enhance the contrast between the living subject and the surrounding environment, thereby improving the performance of liveness detection and feature recognition. The edge-emitting laser is photoelectrically connected to the conductive layer 150 formed on the side surface 167, and by selecting an appropriate inner angle, the thickness of the light-emitting unit 160 of the image capturing system 130 can be reduced.

[0084] In some embodiments, the data processing module 180 is configured to generate each liveness detection signal from at least one sequential image signal, wherein each sequential image signal includes a different image signal. In some embodiments, the data processing module 180 is configured to generate feature identification data from at least one sequential image signal, wherein each sequential image signal includes a different image signal. In a particular embodiment, the different image signals may be image signals of different depths (ΔL) to achieve an optical interference phenomenon.

[0085] Figure 13 This is a timing diagram of an optical pulse according to an embodiment of the present disclosure. Figure 14 This is a timing diagram of the received amounts of light pulses and ambient light according to an alternative embodiment of this disclosure. Figure 15 This is a timing diagram of the received amounts of light pulses and ambient light according to another alternative embodiment of this disclosure. Figure 16 This is a timing diagram of the received amounts of light pulses and ambient light according to another alternative embodiment of this disclosure. Figure 17 This is a timing diagram showing the received amounts of light pulses and ambient light according to yet another alternative embodiment of this disclosure. Please refer to... Figures 13 to 17This disclosure generates each liveness detection signal from at least one sequential image signal to produce liveness detection data, wherein each sequential image signal includes a different image signal. In this way, by adjusting the on / off state and timing of the laser light source 162, this disclosure generates multiple image signals from multiple captured images, and further processes each liveness detection signal including a preset number, thereby improving the signal-to-noise ratio of the image capturing system 130 and reducing the amount of ambient light received. Furthermore, feature recognition data is generated from at least one sequential image signal, wherein each sequential image signal includes a different image signal. In this way, by adjusting the on / off state and timing of the laser light source 162, this disclosure generates multiple image signals from multiple captured images, and further processes each image signal including a default number, thereby improving the signal-to-noise ratio of the image capturing system 130 and reducing the amount of ambient light received. In a particular embodiment, each image signal of the multiple captured images is generated within 0.05 seconds, and at least one sequential image signal comprising different image signals is generated within 0.5 seconds; however, this disclosure is not limited thereto. Those skilled in the art can adjust the generation time of the multiple captured images and the at least one sequential image signal according to actual application requirements, so that the generation time is shorter than or longer than 0.05 seconds and 0.5 seconds, respectively.

[0086] In some embodiments, the first optical module 165 includes one or more diffusers and / or lenses for transmitting the emitted light from the light-emitting unit 160; however, this disclosure is not limited thereto. It is readily understood that the first optical module 165 may include additional elements to achieve different functions, and those skilled in the art can modify or change the features of this disclosure accordingly. Any light emitted by the light-emitting unit 160 via the first optical module 165 that is reflected light from the conductive layer 150 formed on the first inclined surface 164a falls within the scope of this disclosure. Figure 18 This is a schematic diagram of a laser light-emitting unit emitting coherent light via a diffuser and a lens according to an embodiment of this disclosure. Figure 19 This is a partial cross-sectional view of the packaging structure of a laser light-emitting unit according to another alternative embodiment of this disclosure. Please refer to... Figures 18 to 19 and reference Figures 1A to 17 In some embodiments, the first optical module 165 includes one or more diffusers and / or lenses to enable far-field optical control, thereby reducing the amount of ambient light received and improving the signal-to-noise ratio.

[0087] In one embodiment, this disclosure provides an image capturing device, including an image capturing system and a display. In some embodiments, the image capturing device may be integrated into a small or handheld computer device. In a particular embodiment, the image capturing device may wirelessly communicate via a wireless local area network (WLAN) and / or radio frequency communication technologies, such as Wi-Fi, cellular wireless communication, and / or Bluetooth wireless communication. In a particular embodiment, a user may implement the image capturing device using devices such as applications, memory, and a display. In a particular embodiment, the image capturing device may be coupled to a device or system (e.g., a computer terminal) to perform a verification process. The display may be, for example, a liquid crystal display screen, a touch screen, or an indicator billboard. In some embodiments, the display may include a user input interface, such as a display that can interact with a user to obtain input data. Figure 20 This is a schematic diagram of an image capturing device 700 having an imaging module 730 including an integrated circuit according to an embodiment of the present disclosure. Figure 21 This is a schematic diagram of an image capturing device 800 having an imaging module 830 including an integrated circuit, according to an alternative embodiment of this disclosure. Please refer to... Figures 20 to 21 and reference Figures 1A to 19 The image capturing systems of multiple image capturing devices 700 and 800 respectively include a motherboard, a light-emitting unit, an image sensing unit, and a data processing module. Each light-emitting unit is electrically connected to the motherboard and has a laser unit and a first optical module. Each laser unit is used to emit emitted light with an output power exceeding 20 milliwatts, and each first optical module is used to transmit the emitted light from the light-emitting unit. Each image sensing unit is electrically connected to the motherboard near the light-emitting unit and has a second optical module and an image sensing module. The second optical module is used to capture passing images. The image sensing module is used to generate multiple image signals from multiple captured images. Each data processing module is electrically connected to the motherboard near the light source and the image sensing unit, and is used to generate liveness detection signals and feature recognition data from the multiple image signals of the multiple captured images. Each light-emitting unit also includes a substrate having a side surface and a first inclined surface; a conductive layer formed on the side surface and the first inclined surface; and a laser light source. Each laser light source is electrically connected to the conductive layer formed on the side surface and the first inclined surface. The light emitted by each light-emitting unit of the first optical module is reflected light from the conductive layer formed on the side surface and the first inclined surface.

[0088] For other features and principles of the image capturing device, please refer to the relevant descriptions in the above embodiments. For the sake of brevity, they will not be repeated here.

[0089] In one embodiment, this disclosure provides a method for capturing images using an image capturing device. The method includes capturing and generating multiple image signals, generating multiple liveness detection signals from the multiple image signals, generating liveness detection data and a liveness score, and determining whether the liveness score exceeds a liveness threshold to verify the user or lock the image capturing device. Figure 22 This is a schematic diagram of capturing an image of subepidermal features 181 of a user's face (i.e., target 189) according to an embodiment of this disclosure. Figure 23 This is a flowchart of the liveness detection and verification process according to an embodiment of this disclosure. Figure 24 This is a component flowchart of a liveness detection verification process according to an embodiment of this disclosure. Please refer to... Figures 22 to 24 and refer to Figures 1A to 21 The method for capturing images includes emitting light with an output power exceeding 20 milliwatts through a light-emitting unit 160 and transmitting the emitted light through a first optical path; capturing the captured images through an image sensing unit 140 and transmitting the multiple captured images to an image sensing module 142 through a second optical path. In one embodiment, the present disclosure indicates that the image sensing unit 140 has generated multiple captured images through an image capturing device, for example, by using a light-emitting diode display and / or displaying text on the display to indicate that the image sensing unit 140 has generated multiple captured images; however, the present disclosure is not limited to this. The present disclosure generates multiple image signals of the multiple captured images through the image sensing module 142 of the image sensing unit 140. The present disclosure processes the multiple image signals of the multiple captured images through a data processing module 180 to generate multiple liveness detection signals. The present disclosure processes the multiple liveness detection signals through the data processing module 180 to generate liveness detection data. The present disclosure compares the liveness detection data with data in a database through the data processing module 180 to generate a liveness score. This disclosure uses a data processing module 180 to determine whether the liveness score exceeds the liveness threshold; if so, it verifies the user authorization of the image capturing device or further processes multiple image signals; if not, it locks the image capturing device.

[0090] It is readily understood that the method for capturing images using an image capturing device disclosed herein may further include other steps or tasks; however, this disclosure is not limited to the embodiments described above. For example, this disclosure involves emitting light with an output power exceeding twenty milliwatts via a light-emitting unit 160 and transmitting the emitted light through a first optical path before emitting emitted light. This disclosure triggers the verification process via an application, issuing instructions on a display or signboard to indicate one or more default liveness detection areas for the image sensing unit 140 to capture multiple images; however, this disclosure is not limited to this. In another example, multiple identical or different elements and their coordination methods and / or existing methods can be incorporated into the embodiments of this disclosure. For example, some verification sensing methods include dot-projectors, time-of-flight (ToF) sensing, two-dimensional surface imaging, and three-dimensional depth sensing, all of which can be incorporated into the embodiments of this disclosure.

[0091] In a method for capturing images using an image capturing device, this disclosure involves emitting light with an output power exceeding twenty milliwatts via a laser unit 168 of a light-emitting unit 160 and transmitting the emitted light through a first optical path. In the method for capturing images using an image capturing device, the laser unit 168 includes a substrate 161, a conductive layer 150, and a laser light source 162. The substrate 161 has a side surface 167 and a first inclined surface 164a. The conductive layer 150 is formed on the side surface 167 and the first inclined surface 164a, and the emitted light from the light-emitting unit 160 via the first optical path is reflected light from the conductive layer 150 formed on the first inclined surface 164a.

[0092] In some embodiments of the image acquisition method, the image sensing module 142 includes at least one of a complementary metal-oxide-semiconductor array, a charge-coupled device array, and a photodiode array.

[0093] In some embodiments of the image acquisition method, the included angle θ between the side surface 167 and the first inclined surface 164a is between 25 degrees and 75 degrees.

[0094] In certain embodiments, the length of the hypotenuse corresponding to the included angle θ may be different; however, this disclosure is not limited thereto. In certain embodiments, the length of the hypotenuse corresponding to the included angle may be the same, as long as the emitted light from the light-emitting unit 160 of the first optical module 165 is reflected light from the conductive layer 150 formed on the first inclined surface 164a, it falls within the scope of this disclosure.

[0095] This disclosure provides design flexibility for configuring the emitted light of the light-emitting unit through the first optical module of the image capturing system. For example, this disclosure allows for different optical structures to be constructed by changing the size of the inner angle (e.g., adjusting the tilt angle by adjusting the size of the hypotenuse and the vertical side), enabling the light-emitting units within the image capturing system to achieve the same target emission area.

[0096] In some embodiments of the image capturing method, the conductive layer 150 of the image capturing system 130 of the image capturing device is made of at least one of gold, silver, copper, nickel, titanium and tungsten or any combination of the above elements.

[0097] A conductive layer is formed on the side surface and the first inclined surface to reduce the absorption of light emitted by the light-emitting unit when it is reflected. Furthermore, the laser light source electrically connected to the conductive layer and the circuitry of the image capturing system coupled to the laser light source can dissipate heat through the thermal conductivity of the conductive layer.

[0098] In some embodiments of the image acquisition method, the step of generating a liveness detection signal includes generating each liveness detection signal from at least a sequence of image signals, wherein each sequence of image signals includes a different image signal. For example, each liveness detection signal may be a combination of captured vascular features and blood flow signals; however, this disclosure is not limited thereto. Each liveness detection signal may be a combination of captured retinal features, palm print features, and fingerprint features, etc.

[0099] In some embodiments of the image acquisition method, the method further includes generating feature identification data and a matching score; determining whether the matching score exceeds an unlock threshold to verify the user or lock the image acquisition device; and further processing the image signal when the liveness score exceeds the liveness threshold. This disclosure generates a matching score by comparing feature identification data and data in a database using a data processing module 180. This disclosure determines whether the matching score exceeds an unlock threshold using the data processing module 180. If yes, this disclosure authenticates the user's use of the image acquisition device; if no, this disclosure locks the image acquisition device.

[0100] In a particular embodiment of the image acquisition method, the step of generating feature identification data includes generating feature identification data from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

[0101] In some embodiments of the image acquisition method, the laser light source 162 is an edge-emitting laser unit with a coherence length of less than 30 centimeters.

[0102] This disclosure uses edge-emitting laser light, providing design flexibility for a single light source that requires high output power and a long coherence length. The laser light 191 of the light-emitting unit can emit coherent light 172 to the target 179, enabling the detector 194 to detect the reflected light 177 from the target 179.

[0103] This disclosure utilizes a high-output-power edge-emitting laser unit to enhance the contrast between living objects and the surrounding environment, thereby improving the performance of liveness detection and feature recognition. Figure 25A This is a schematic diagram of the features of an infrared light-shielding material wrapped around the middle finger of a user's hand according to an embodiment of this disclosure. Figure 25B According to the embodiments disclosed herein Figure 25A An illustration of the feature of infrared light-blocking material wrapped around the middle finger of a user's hand. Figure 25C According to the embodiments disclosed herein Figure 25A A diagram illustrating the live signal of infrared light-blocking material wrapped around the middle finger of the user's hand. Figure 26A This is a schematic diagram of a photograph showing the features of a user's face according to an embodiment of this disclosure. Figure 26B According to the embodiments disclosed herein Figure 26A A diagram illustrating the liveness signal of the user's face. Figure 26C According to the embodiments disclosed herein Figure 26A This is an illustration of the subcutaneous features of the user's face. Please refer to the photograph. Figures 25A to 26C and refer to Figures 1A to 24 This disclosure generates liveness detection data from each liveness detection signal of at least one sequential image signal, wherein each sequential image signal includes a different image signal. In this way, by adjusting the on / off state and timing of the laser light source 162, this disclosure generates multiple image signals from multiple captured images, and further processes each liveness detection signal including a preset number, thereby reducing the amount of ambient light received and improving the signal-to-noise ratio of the image capturing system 130. Furthermore, this disclosure generates feature recognition data from at least one sequential image signal, wherein each sequential image signal includes a different image signal. In this way, by adjusting the on / off state and timing of the laser light source 162, this disclosure generates multiple image signals from multiple captured images, and further processes each image signal including a default number, thereby reducing the amount of ambient light received and improving the signal-to-noise ratio of the image capturing system 130.

[0104] An edge-emitting laser photoelectric connection is formed on the conductive layer 150 on the side surface 167. By selecting an appropriate inner angle, the thickness of the light-emitting unit 160 of the image capturing system 130 can be reduced. For other features and principles of the image capturing device, please refer to the relevant descriptions of the above embodiments, which will not be repeated here for the sake of brevity.

[0105] Biometric technology uses the unique biometric characteristics of each individual to verify personal identification. The advantages of biometric authentication systems include high security and the indispensability of biometric data. However, biometric authentication is vulnerable to "image attacks" involving fraud, which attempt to compromise biometric authentication or identification procedures.

[0106] Liveness detection is a technology used to detect biometric fraud, determining whether a biological sample originates from a living human or is a fake. Liveness detection involves analyzing and processing collected biological sample data to determine whether the sample comes from a living person or a counterfeit.

[0107] For passive liveness detection, algorithms can detect metrics or features in non-real-time images without requiring user interaction. Experiments have shown that capturing high-quality biological data during the verification process helps improve the performance of feature matching and liveness detection algorithms. Nevertheless, fraudulent "image attacks" remain a challenge for biometric verification.

[0108] This disclosure provides a liveness detection device and a related verification method. The liveness detection device includes a light-emitting unit, an image sensing unit, and a data processing module. The substrate of the light-emitting unit has a first inclined surface, and the emitted light is reflected light from the first inclined surface. This disclosure triggers a verification process via an application to verify a user. The light-emitting unit emits light with a specific pattern within a specific period to generate multiple image signals. This disclosure generates multiple liveness detection signals for determining liveness, wherein the multiple liveness detection signals are generated from at least one sequential image signal by calculating multiple optical interference patterns. When the liveness score of the multiple liveness detection signals reaches a liveness threshold, this disclosure further generates feature identification data for matching, wherein the feature identification data is generated from at least one sequential image signal by calculating multiple optical interference patterns. Then, this disclosure compares the feature identification data with previously registered data to lock or unlock the liveness detection device and / or the system coupled thereto.

[0109] In some embodiments, the included angle disclosed herein provides design flexibility for the configuration of the emitted light of the light-emitting unit through the first optical module of the image capturing system. For example, this disclosure allows for different optical structures to be constructed by changing the size of the included angle (e.g., adjusting the tilt angle by adjusting the size of the hypotenuse and vertical side), enabling the light-emitting units within the image capturing system to achieve the same target emission area. This disclosure uses edge-emitting laser light, providing design flexibility with a single light source of high output power and a long coherence length. The use of high-output-power edge-emitting laser light in this disclosure can improve the contrast between the living subject and the ambient scene, thereby improving the performance of liveness detection and feature recognition. The edge-emitting laser is photoelectrically connected to a conductive layer formed on the side surface, and by selecting an appropriate included angle, the thickness of the light-emitting unit in the image capturing system can be reduced. Liveness detection data is generated from at least one sequential image signal, where each sequential image signal includes a different image signal. In this way, by adjusting the on / off state and timing of the laser light source, this disclosure generates multiple image signals from multiple captured images, and further processes each liveness detection signal, including a preset number, thereby improving the signal-to-noise ratio of the image capturing system and reducing the amount of ambient light received. Furthermore, feature recognition data is generated from at least one sequential image signal, where each sequential image signal includes a different image signal. In this way, by adjusting the on / off state and timing of the laser light source, this disclosure generates multiple image signals from multiple captured images, and further processes each image signal, including a default number, thereby reducing the amount of ambient light received and improving the signal-to-noise ratio of the image capturing system.

[0110] In some embodiments, a conductive layer is formed on the side surface and the first beveled surface to reduce the absorption of light emitted by the light-emitting unit when reflected. Furthermore, the circuitry of the laser light source electrically connected to the conductive layer and the image capturing system coupled to the laser light source can dissipate heat through the thermal conductivity of the conductive layer. The conductive layer is made of materials including gold, silver, copper, nickel, titanium, and tungsten, thereby providing design flexibility in the conductivity and reflectivity of the conductive layer.

[0111] Although this disclosure has been described above with reference to embodiments, it is not intended to limit the scope of this disclosure. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure shall be determined by the appended claims. Regarding directional terms used herein, such as "up," "down," "high," "low," "horizontal," "vertical," "left," and "right," these are merely for reference to the accompanying drawings and are not intended to define absolute structural relationships, positions, and / or directions. Regarding the terms "first," "second," etc., used herein, they do not specifically refer to any order or sequence, nor are they intended to limit the invention; they are merely used to distinguish elements or operations described using the same technical terms. Regarding the terms "comprising," "having," etc., used herein, these are open-ended terms, meaning "including but not limited to." Unless the context clearly indicates otherwise, these terms do not specifically refer to or imply any order or sequence, nor are they intended to limit this disclosure. The term "a" as used herein describes a single element, but it is not intended to limit it to "unique" or "only one." Unless the context clearly indicates otherwise, the term refers to "one or more." Furthermore, the term "and / or" as used herein includes any one or more of the related enumerated items and all combinations thereof. Scope terms used herein, such as "at least," "greater than," "less than," "not greater than," etc., include the upper or lower limits of the entire scope and / or part of the scope. Although this invention has been disclosed above by way of embodiments, it is not intended to limit this disclosure. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of this disclosure. Therefore, the scope of protection of this disclosure shall be determined by the appended claims.

[0112] In view of the many possible embodiments to which the disclosed principles may be applied, this disclosure reserves the right to claim any and all combinations of the features and operations described herein, including the right to claim all rights falling within the scope and spirit of the foregoing, any claim made at any time in the claims and throughout the duration of this application or in any application claiming interest or priority of this application, as well as combinations of descriptions and literal and equivalent statements described in the appended claims and any claims.

[0113] [Symbol Explanation]

[0114] 130: Image Capture System

[0115] 140: Image sensing unit

[0116] 142: Image Sensing Module

[0117] 145: Second optical module

[0118] 149: Sensing module circuit

[0119] 150, 250, 350, 550, 650: Conductive layer

[0120] 160: Light-emitting unit

[0121] 161,261,361,561,661:Substrate

[0122] 162,262,362,562,662: Laser light source

[0123] 163: Shell

[0124] 164a, 264a, 364a, 564a, 664a: First inclined surface

[0125] 164b, 364b: Second inclined surface

[0126] 165: First Optical Module

[0127] 166,266,366,566,666: Edge surfaces

[0128] 167,267,367,567,667: Side surface

[0129] 168: Laser Unit

[0130] 169: Laser unit circuit

[0131] 172, 174, 176: Emit coherent light

[0132] 179,189: Target

[0133] 180: Data Processing Module

[0134] 181: Subepidermal features

[0135] 190: Motherboard

[0136] 191, 193, 195: Laser light-emitting units

[0137] 194: Connector

[0138] 196: Welding bump

[0139] 700, 800: Image capturing device

[0140] 730, 830: Imaging module

[0141] θ: Interior angle

[0142] AA: Line segment.

Claims

1. An image capturing system, characterized in that, include: Motherboard; The light-emitting unit, electrically connected to the motherboard, has a laser unit and a first optical module. The laser unit is used to emit light with an output power of more than 20 milliwatts, and the first optical module is used to transmit the emitted light of the light-emitting unit. An image sensing unit, electrically connected to the motherboard near the light-emitting unit, includes a second optical module and an image sensing module. The second optical module is used to capture multiple captured images, and the image sensing module is used to generate multiple image signals from the captured images. The data processing module is electrically connected to the motherboard close to the light-emitting unit and the image sensing unit, and is used to generate multiple liveness detection signals of the multiple image signals of the multiple captured images. The laser unit is an edge-emitting laser unit, and the laser unit includes: The substrate has a side surface and a first inclined surface; A conductive layer is formed on the side surface and the first inclined surface; and A laser light source, electrically connected to the conductive layer formed on the side surface, wherein the emitted light from the light-emitting unit of the first optical module is reflected light from the conductive layer formed on the first inclined surface; The data processing module is used to calculate multiple optical interference patterns generated by the coherent light emitted by the edge-emitting laser unit from at least one sequential image signal, so as to generate multiple liveness detection signals to determine the liveness of the subject.

2. The image capturing system of claim 1, wherein the included angle between the side surface and the first oblique surface is between 25 degrees and 75 degrees.

3. The image capturing system of claim 1, wherein the data processing module is used to generate the plurality of liveness detection signals from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

4. The image capturing system as claimed in claim 1, wherein the data processing module is further configured to generate feature identification data of the plurality of image signals of the plurality of captured images.

5. The image capturing system of claim 4, wherein the data processing module is further configured to generate the feature identification data from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

6. The image capturing system of claim 1, wherein the laser unit is an edge-emitting laser unit and the coherence length of the edge-emitting laser unit is less than 30 cm.

7. The image capturing system of claim 1, wherein the image sensing module comprises at least one of a complementary metal-oxide-semiconductor array, a charge-coupled device array, or a photodiode array.

8. An image capturing device, characterized in that, include: Image capturing system, including: Motherboard; The light-emitting unit, electrically connected to the motherboard, has a laser unit and a first optical module. The laser unit is used to emit light with an output power of more than 20 milliwatts, and the first optical module is used to transmit the emitted light of the light-emitting unit. An image sensing unit, electrically connected to the motherboard near the light-emitting unit, includes a second optical module and an image sensing module. The second optical module is used to capture multiple captured images, and the image sensing module is used to generate multiple image signals from the captured images. The data processing module is electrically connected to the motherboard close to the light-emitting unit and the image sensing unit, and is used to generate multiple liveness detection signals of the multiple image signals of the multiple captured images. The laser unit is an edge-emitting laser unit, and the laser unit includes: The substrate has a side surface and a first inclined surface; A conductive layer is formed on the side surface and the first inclined surface; and A laser light source electrically connected to the conductive layer formed on the side surface, and the emitted light from the light-emitting unit of the first optical module is reflected light from the conductive layer formed on the first inclined surface; and A display device is coupled to the image capturing system for displaying the multiple captured images of the image sensing unit; The data processing module is used to calculate multiple optical interference patterns generated by the coherent light emitted by the edge-emitting laser unit from at least one sequential image signal, so as to generate multiple liveness detection signals to determine the liveness of the subject.

9. The image capturing apparatus of claim 8, wherein the included angle between the side surface and the first inclined surface is between 25 degrees and 75 degrees.

10. The image capturing apparatus of claim 8, wherein the data processing module is configured to generate the plurality of liveness detection signals from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

11. The image capturing apparatus of claim 8, wherein the data processing module is further configured to generate feature identification data of the plurality of image signals of the plurality of captured images.

12. The image capturing apparatus of claim 11, wherein the data processing module is further configured to generate the feature identification data from at least one sequential image signal, wherein each sequential image signal includes a different image signal.

13. The image capturing apparatus of claim 8, wherein the laser unit is an edge-emitting laser unit and the coherence length of the edge-emitting laser unit is less than 30 cm.

14. The image capturing apparatus of claim 8, wherein the image sensing module comprises at least one of a complementary metal-oxide-semiconductor array, a charge-coupled device array, or a photodiode array.

15. A method for capturing images, used in an image capturing device, characterized in that, include: The light-emitting unit emits light with an output power of over 20 milliwatts to the target via the first optical path; Multiple captured images are obtained by the image sensing unit and transmitted to the image sensing module via the second optical path; The image capturing device instructs the image sensing unit to generate the multiple captured images; the image sensing module of the image sensing unit generates multiple image signals of the multiple captured images; The data processing module processes the multiple image signals of the multiple captured images to generate multiple liveness detection signals. The data processing module processes the multiple liveness detection signals to generate liveness detection data. The data processing module compares the liveness detection data with the data in the database to generate a liveness score. as well as The data processing module determines whether the liveness score exceeds the liveness threshold; if so, it authenticates the user to use the image capturing device or further process the multiple image signals; if not, it locks the image capturing device. The laser unit of the light-emitting unit is used to emit light with an output power of more than 20 milliwatts, and the emitted light of the light-emitting unit is transmitted to the target via the first optical path. The image sensing module of the image sensing unit is used to generate multiple image signals of the multiple captured images. The laser unit is an edge-emitting laser unit, and the laser unit includes: The substrate has a side surface and a first inclined surface; A conductive layer is formed on the side surface and the first inclined surface; and The laser light emitted to the target via the first optical path is the reflected light from the conductive layer formed on the first inclined surface; The data processing module is used to calculate multiple optical interference patterns generated by the coherent light emitted by the edge-emitting laser unit from at least one sequential image signal, so as to generate multiple liveness detection signals to determine the liveness of the subject.

16. The method for capturing images as claimed in claim 15, wherein the included angle between the side surface and the first oblique surface is between 25 degrees and 75 degrees.

17. The method for capturing images as described in claim 15, wherein, Multiple liveness detection signals are generated, including: The plurality of liveness detection signals are generated by at least one sequential image signal, wherein each sequential image signal includes a different image signal.

18. The method for capturing images as described in claim 15, wherein, When it is determined that the liveness score exceeds the liveness threshold, the further processing steps for the multiple image signals also include: This data processing module generates feature identification data: The data processing module compares the feature identification data with the data in the database to generate a matching score. The data processing module compares the matching score with the unlock threshold of the image capturing device; and The data processing module determines whether the matching score exceeds the unlock threshold; if so, it authenticates the user's use of the image capturing device or further processing of the multiple image signals; if not, it locks the image capturing device. The feature identification data is generated from at least one sequential image signal, each sequential image signal including different image signals.

19. The method for capturing images as described in claim 15, wherein the laser unit is an edge-emitting laser unit and the coherence length of the edge-emitting laser unit is less than 30 centimeters.

20. The method for capturing images as claimed in claim 15, wherein the image sensing module comprises at least one of a complementary metal-oxide-semiconductor array, a charge-coupled device array, or a photodiode array.

Images