39 results about "Fingers skin" patented technology

An embodiment of the invention relates to the technical field of electrons and discloses a flashlight adjusting method. The method includes: acquiring an image captured by a camera; acquiring a figure skin color from the image; according to the finger skin color, adjusting optical parameters of a flashlight so as to modify the figure skin color in the image. By implementation of the method, the figure skin color in the image can be modified by adjusting the optical parameters of the flashlight so as to beautify the shot image.

The invention relates to a finger and palm print instrument used for collection of soaked finger and palm prints. The finger and palm print instrument comprises a light source, a prism and a reception system. The reception system includes a lens and an image receiver. And the prism consists of a light incidence plane, an image output plane and a collection plane. Light emitted by the light sourceenters the prism through the light incidence plane and irradiates on the collection plane where a palm print and the prism are contacted so as to carry out scattering; parts of scattered light is emitted by the image output plane and then is imaged on the image receiver through the lens; besides, an included angle A between a trajectory L1 of a light and a collection plane normal L2 is greater than a critical angle B1 that is formed by emission of the light from a glass medium into water as well as is less than a critical angle B2 that is formed by emission of the light from a glass medium toa finger skin and grease mixing medium, wherein the light enters the lens and is superposed with an optical axis of the lens as well as is transmitted in the prism and is intersected with the collection plane. According to the invention, on the premise that there is no image detail loss, a problem of imaging blurring of a finger and a palm on the moist and soaking conditions can be effectively solved.

A fingerprint sensing device that measures the capacitance between an array of electrode plates and finger skin using pulse processing, in which pulse width rather than voltage level, is used for capacitance measurement and digital signal conversion. A pulse, the width of which is compared and adjusted with that of a reference pulse, is generated when voltage at sensing electrodes in discharging is compared with a reference voltage. The comparison results are then digitalized in a grade image sensor or output directly in a binary image sensor. The sensor can communicate with a CPU using serial communication, parallel communication, or memory map scheme. Since no A / D is used, there is no extra time and hardware cost for the conversion from analog signals to digital signals. Due to the pulse processing nature, the circuits can be configured insensitive to the change or fluctuation in voltage supply. This feature enables the sensing device work with a variety of voltages, and thus it can be better used in portable, battery powered or passive devices.

The present invention discloses a multi-functional bionic finger capable of detecting a three-dimensional force. The multi-functional bionic finger comprises a phalanx; the front section of the phalanx is wrapped by finger skin, and a cavity is formed inside the front section of the phalanx; the rear section of the phalanx is wrapped by a protective shell; a channel is installed inside the phalanx; the channel and the cavity are filled with a filling medium; the channel is connected with one end of a pressure sensor; the other end of the pressure sensor is connected with a signal processing circuit; the upper end of the signal processing circuit is connected with an external communication circuit; the lower end of the signal processing circuit is connected with a sensitive component signal transmission circuit; the front section of the sensitive component signal transmission circuit is provided with an electrode and a temperature sensitive component; and the outer portion of the finger skin is provided with bionic lines. The bionic finger of the invention can simultaneously sense environmental information such as temperature, micro vibration and a three-dimensional force and can acquire the physical characteristics such as shape and stressed state, of a target object. The multi-functional bionic finger is of great significance to the realization of stable and controllable grasp of objects for a robot and the improvement of the operating dexterity of the robot.

A method using optical coherence tomography to capture the microvascular network of the superficial layer of the finger skin for the purpose of fingerprint authentication and liveness detection. At the dermal papilla region, the vascular pattern follows the same pattern of the fingerprint and this vascular pattern forms a live vascular fingerprint. This live vascular fingerprint provides for ultrahigh security and a unique way for fingerprint-based personal verification. Because the system is based on blood flow, which only exists in a living person, the technique is robust against spoof attaching. After performing non-contact in-vivo imaging of a human fingertip, a three dimensional vasculature image is reconstructed from a plurality of vasculature tomography images and at least one vasculature fingerprint image which corresponds to the fingertip is extracted from the three dimensional vasculature image. This extracted image may then be compared to known fingerprint database for authentication or for liveness detection.

The invention belongs to the technical field of medical apparatuses, and discloses a skin disinfection effect monitoring quick sampling device. The skin disinfection effect monitoring quick sampling device is of a cuboid structure, a portable handle and a control switch are arranged on an upper cover of a cuboid, an automatic door is arranged in the front of the cuboid, and a sampler baseboard isarranged on the bottom face of the cuboid; the sampler baseboard is provided with a receiving pond, a finger groove, a membrane groove, a control box, a chargeable battery and supporting plates; two supporting plates are arranged, a cross rod is in lap joint with the two supporting plates and is provided with a sampling head, and the two supporting plates are provided with ultraviolet lamps respectively. With 'a set time, set pressure and set area' of sampling being a basic principle in combination with a related automated technology, a semi-automated finger skin quick sampler which is convenient, accurate and quick to sample, is designed, and a basis is provided for changing a skin disinfection effect quick detecting method.

The invention discloses a fingerprint identification display device, a manufacturing method and a driving method thereof. A plurality of photosensitive units are arranged inside the display device, and each photosensitive unit includes: a photosensitive unit for sensing changes in light intensity when a fingerprint is pressed. Diodes, and control switch transistors used to control the photodiode to convert light intensity changes into different potential outputs; the display device also has a component that emits light that can be sensed by the photodiode. When the user's finger is close to the surface of the display device, due to the uneven ridges and valleys on the skin surface of the finger, the photodiode emitted by the display device can sense the light intensity of the light irradiated on the ridges and valleys of the finger and reflected to the photodiode of the photosensitive unit Differently, the light intensity difference is converted into the current signal difference to realize the fingerprint detection. The photosensitive unit detects the fingerprint based on the photosensitive effect, which is not easy to interfere with the internal components of the display device, and it is easy to realize high-quality fingerprint detection.

A method for parameter estimation of a human skin-electrode bioelectrical impedance model based on an electrical tactile device is provided. The method is characterized in that: the recursive algorithm with forgetting factor is used, and the data is weighted with the default forgetting factor, so that the new data occupies a greater weight in the parameter estimation; the new input and output dataprovided by the electrical tactile device are used to improve the estimation accuracy, and when the parameters are changed, the estimation is modified to realize online real-time estimation of the parameters; and at the same time, the augmented model is adopted, and the error between the electrical stimulus amount output by the complete and reasonable hypothesis model and the real finger electrical stimulus amount is colored noise, but not the ideal white noise, so that the result is more in line with the actual situation and can adapt to parameter estimation in different noise conditions. The method provided by the present invention avoids the decrease of the parameter correction ability and the interference of the single noise model to the parameter estimation after the recursive step is prolonged, and improves the instantaneity and the accuracy of the finger skin impedance parameter estimation; and the method provided by the present invention is thoughtful, simple and reasonable indesign, easy to implement, and strongly adaptable.

The invention discloses a fingerprint authenticity identification device. The device comprises a touch panel in contact with a finger, a detecting device, a memory and a processor, wherein the detecting device, the memory and the processor are arranged under the touch panel. The detecting device comprises an ultrasonic probe array used for detecting the thickness of the finger skin and blood flow,and an infrared sensor which is arranged in the middle of the ultrasonic probe array to detect the temperature of the finger. The ultrasonic probe array, the infrared sensor and the memory are connected with the processor respectively. According to the invention, the temperature of the finger skin is detected by the infrared sensor, so as to discriminate whether the finger is of a living body; the thickness of the finger skin is detected by the ultrasonic probe array, so as to discriminate the authenticity of the fingerprint; theft of the finger of another person is prevented; the blood flowis detected, which can also identify whether the finger is not of a living body; through multi-point detection and various detection methods, the detection accuracy is improved; the device is furtherprovided with a data transmission device; and when a counterfeit fingerprint is detected, a signal is transmitted to a host computer to notify a monitoring person.

The invention relates to a finger ring structure which comprises a finger ring. The finger ring at least comprises an outer layer and an inner layer which comes into contact with a finger, wherein the inner layer is of a bulged arc shape, a cavity is formed between the outer layer and the inner layer, and the inner layer is provided with a hollowed pattern. The ring belt of the inner layer comprises a first ring belt and a second ring belt in types, wherein hollowly embedded characters or patterns are arranged on the first ring belt, and a hollowed pattern is arranged on the second ring belt.The diameter of the inner layer is of the structure with two large sides and a small middle, and air flows are formed on both sides of the finger ring by utilizing the characteristics of two small sides and large middle of the arc shape; and the air flows flow into the cavity of the finger ring through the hollowed pattern on one side of the inner layer of the finger ring and then flow out of thehollowed pattern on the other side of the inner layer of the finger ring. When the finger ring is worn, the contact area between the inner layer of the finger ring and finger skin is greatly decreased so that the integral air permeability of the finger ring is revolutionarily improved; after the finger ring is worn for a long term, no white circular ring and ring mark appear on the finger; and the wearing comfortableness of the finger ring is qualitatively improved.

The invention relates to a five-finger work glove with guaranteed space, which is characterized by comprising: cutting a thumb hole under the palm skin, forming a finger end at the upper end, and extending to the finger end so that the front index finger and the back index finger form a whole, and the side surface of the back index finger forms a whole. The palm skin that forms the suture end; the back middle finger, the back ring finger, and the back little finger form a whole, the back middle finger side forms a suture end, and the back of the palm skin is stitched with the suture end of the back index finger side; the front middle finger, front ring finger, and front little finger form a whole, The finger skin sutured to the finger end of the palm skin above; the thumb skin sutured to the thumb hole of the palm skin. This kind of five-finger work gloves, the number of fingers of the whole plate finger skin has been increased from 2 to 3, cut and sewn into various shapes, and made by moving the stitching points between the fingers on the back to ensure the extra space between the fingers and the movement of the fingers The flexibility of the machine eliminates the connection on the back, which solves the phenomenon of squatting and helps to improve work efficiency.

A system for synchronous collection of multimodal features of a finger, comprising a finger skin fingerprint collection module (1000), a finger OCT information collection module (1100), a support module (1200), a finger OAG information processing module (1300) and a computer (1400); The support module (1200) is used to expand the data interface so that the data transmission and power output between the computer and each module; the finger skin fingerprint collection module (1000) is used to realize the collection of finger skin fingerprint information; the finger OCT information collection module (1100) is used for Yu is responsible for the collection of finger OCT information; the finger OAG information processing module (1300) is used to convert OCT information into OAG information; the computer (1400) is used to further process the collected information. The invention can obtain finger skin fingerprints, finger dermis fingerprints and sweat glands, and finger subcutaneous blood flow velocity information.