RO131764A0 - Plurisensorial electronic device for biological validation of samples in hand vein pattern biometrics - Google Patents

Abstract

The invention relates to a plurisensorial electronic device meant for biological validation of samples in a biometric system for person identification. According to the invention, the device comprises a mechanical support (1) attached to a biometric system (2), the support having in its central area an infrared stereoscopic video camera (3), a set of light emitting diodes (4) with emission in the red zone of the visible spectrum, a set of photoelectric transducers (5) with maximum sensibility to red light, a thermopile-type temperature transducer (6), an optical state indicator (7), a metal plate (8) intended to reduce optical influence of the environment and a microprocessor (9) which acquires and processes the intensity value of luminous radiation reflected by the user's hand.

Description

Date of filing

Multi-sensory electronic device for biological validation of samples in the biometrics of hand veins

The invention relates to a multi-sensory electronic device intended for biological validation of the hands presented as evidence in a biometric system based on the recognition of the venous routes of a user's hand.

In recent years, many constructive solutions for biometric systems have been presented using various parameters of the human body as identifiers of a person. Verifying the correctness and reality of a biometric parameter is necessary in order to avoid the introduction of false evidence in a biometric system. Biological validation is a difficult problem from a sensory point of view, due to the high amount of additional information that must be processed and the complexity of the system increased by the addition of additional external sensors. The difficulty arises especially in biometric devices where there is no mechanical contact between the sample and the system, as is the case with the biometrics of the venous routes of the hand. A biological validation system presented in EP2371283 / US8948464 is known, which involves measuring the diameter of the veins after altering blood pressure by changing the position of the hand, resulting in a considerable increase in scan times and introducing additional problems related to other physical and medical causes that may cause the diameter to change. blood vessels (altitude, physical exertion, temperature, etc.). A device described in US9384404 is also known where recognition is performed using optical coherence tomography which assumes a prohibitive price for use in distributed biometric systems and can only be used to determine vascularization of capillary vessels at the tip of the fingers. Also known is a method of determining living tissue using human skin reflection and absorption parameters specified in US8229178 with the disadvantage of using the same video camera without incident wavelength filtering and with a small number of materials tested as false samples. Also, changing the rotation angle and hand position will result in inconclusive results.

The technical problem solved by the invention is the creation of a device capable of allowing the correct biological validation of a user's hand, positioned with or without mechanical contact in a biometric system using venomous routes as a parameter and which prevents the fraud of the biometric system by introducing counterfeit samples.

The electronic device, according to the invention, offers the possibility of identifying whether a biometric sample is alive or not, being an active, multisensory device, which eliminates the disadvantages mentioned above, which can be used in any biometric system based on the analysis of veneteuio. , both by mechanical contact and the touch

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1 -11- 2016 ^Γ device. The device is placed in a biometric system and uses a set of 4 sensory elements to determine if the presented hand is "alive." Through the fusion of the data received from a stereoscopic video camera, from a set of sensitive photoelectric transducers to a narrow sub-spectrum of visible radiation, from a thermocouple non-contact thermoelectric transducer and corroborated with the analysis of the infrared image of the skin and the venous model. specific to a biometric system of this type, a precise mechanism of biological validation of the hand is obtained. The device can work in all biometric systems that use the blood vessel path including vein detection on the front of the hand, the back of the hand, wrist or fingers.

The following is an example of an embodiment of the invention, in relation to Figures 1 and 2, which represent:

FIG. 1 Section of the multi-sensory electronic device for biological validation

FIG. 2 Representation of the position of the plate for reducing environmental interference and the arrangement of the constructive modules

The electronic device subject to this invention consists - according to the figures - of a mechanical support (1) attached to the biometric system (2), which contains an infrared stereoscopic video camera (3), a set of electroluminescent diodes emitted in the red area of the visible spectrum. (4), a set of photoelectric transducers with maximum sensitivity to red light (5) a thermocouple temperature transducer (6) an RGB emission optical state signal (7), a metal plate for reducing the optical influences of the environment ( 8) and a microprocessor (9).

After detecting the presence of a hand under the scanning system with the help of the stereoscopic camera 3 fixed in the central part of the mechanical support 1, the proper illumination of the biometric system 2 is activated and the color of the state optical signal 7 is changed. At the same time, the electroluminescent diodes 4 are activated and acquired and processed by means of the microprocessor 9, the intensity of the light radiation reflected by the user's hand and detected by the photoelectric transducers 5, and the temperature value obtained with the aid of the transducer 6 also processed with the microprocessor 9 connected to the biometric system 2 is recorded.

The device can also be activated by the biometric system 2 or based on the direct reading of the reflection values in the electroluminescent diode assembly 4 / photoelectric transducers 5 mode through the microprocessor 9 which allows to reduce the power consumption and protect the video modules of the device 3.

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The metal plate 9 is partially movable on the circumference of the mechanical support 1 and can be placed on the side of the biometric system 2 to reduce the external influence of the light radiation and the temperature on the device.

The following advantages are obtained by applying the invention:

The possibility of checking whether a user's hand is "alive" or is a counterfeit sample to be scanned in a biometric system based on the analysis of the venous routes of the hand.

Determining the biological validity of the hand in any configuration: hand, back of hand, wrist or fingers

Reducing the energy consumption of the biometric device and protecting the video modules of the device

- Increasing the degree of intrusion protection of the device by using a multi-sensory detection system.

Possibility of using the device in systems with mechanical restraint of the hand or in systems where the hand can move freely

Easier user guidance in scanning procedures by using a visible external optical signal.

Claims (4)

claims 1. The multi-sensory electronic device for the biological validation of the samples in the biometry of the venous routes of the hand, characterized in that it is composed of a mechanical support attached to the biometric system, which contains an infrared stereoscopic video camera, a set of electroluminescent diodes emitted in the red area. of the visible spectrum, a set of photoelectric transducers with maximum sensitivity to red light, a thermocouple temperature transducer, an RGB emission optical state signal, a metal plate to reduce the optical influences of the environment and a microprocessor. 2. The multi-sensory electronic device for biological validation of the samples according to claim 1, characterized in that it biologically validates a user's hand in all biometric systems using venous routes. 3. The multi-sensory electronic device for biological validation of the samples according to claims 1 and 2, characterized in that it is an active device that can be used in systems with and without mechanical restraint of the hand. 4. The multi-sensory electronic device for biological validation of the samples according to claim 1, 2 and 3, characterized in that it allows the reduction of energy consumption in the biometric systems of the venous routes.