The speed of fingerprinting technology is rapidly changing in development. This kind of light brush can be used to complete the means of identification, and has become more and more common for companies and individuals.
Recalling the development of fingerprint recognition technology In fingerprint products, fingerprint sensors and fingerprint algorithms are the key. Fingerprint processing is the process of collecting fingerprint images and image preprocessing. Therefore, whether a clear fingerprint image can be used is the key to fingerprint processing. A fingerprint sensor is a fingerprint image acquisition component. Therefore, the performance of the fingerprint sensor directly affects the performance of the fingerprint product.
Fingerprint sensors are classified into press type and slide type fingerprint sensors according to their physical form. The main types of fingerprint sensors are semiconductor fingerprint sensors and optical fingerprint sensors. With the change of fingerprint application requirements, fingerprint sensors have also undergone three generations of technological innovations.
The first generation of optical fingerprint sensors: mainly the principle of photogrammetry and reflection collection of fingerprint images, the advantages of strong antistatic ability, low product cost, long service life, but has the inability to carry out live fingerprint identification, poor applicability to wet and dry fingers Other shortcomings, such as "fingerprints" and other simulation fingers are easy to get through, that is, non-living fingerprint recognition.
The second-generation capacitive fingerprint sensor: It can also be called a semiconductor fingerprint sensor. It mainly uses the principle of capacitance, electric field, temperature, and pressure to achieve fingerprint image acquisition.
The third generation of improved capacitive fingerprint sensor: its advantages are higher acquisition resolution, can detect the dermis of the finger, and has good applicability to wet and dry fingers, also known as live fingerprint recognition. It is understood that the main line of the Asian Touch product line is the third-generation live fingerprint recognition technology.
Everyday people see, such as fingerprint mouse, fingerprint U disk, fingerprint hard drive, fingerprint notebook, fingerprint car and other products are mostly used capacitive fingerprint sensor (especially in slide fingerprint sensor); fingerprint access control, office fingerprint attendance, etc. Applications are mostly optical push-type fingerprint sensors.
Live fingerprint recognition The so-called live fingerprint recognition is an emerging technology that uses the electrical characteristics of the human dermis to acquire the effective fingerprint eigenvalue data of the human finger. Live fingerprint recognition can penetrate into the dermal layer of human skin tissue for fingerprint identification, and simultaneously sense the temperature, humidity and other indicators of the finger when intercepting the fingerprint image, further improving the effectiveness and safety of fingerprint recognition.
We know that fingerprint recognition is based on fingerprints, and true fingerprints are formed in the dermis. The fingerprint information of the dermis is clearer and more accurate than the epidermis, and does not change with age, but is acquired under the first generation of optical fingerprinting technology. Only the texture information of the fingerprint skin, such skin fingerprints will become blurred with age. In addition, the optical mechanism determines that the fingerprint can be easily copied. As long as the texture map of the fingerprint is obtained, a fingerprint can be copied. In contrast, the living identification technology determines that the recognition object must be a living finger, even if it is the same. The texture map or the fingers that are separated from the human body cannot be identified because they do not have the electrical characteristics of the leather fingerprint.
Therefore, the biometric fingerprint recognition product can better protect the fingerprint privacy of the user and can automatically adapt to the fingerprints of wet, dry, and scratched fingers, and is safer to use. For wanting to pass illegal means such as "fingerprint sleeves", artificial fingers, rubber fingers, fingerprints Fingerprint interception, such as residual print interception, attempts to evade the identity authentication of the device can be rejected, completely lost its effect.
Finally, marketers disclosed a relatively simple method for identifying fingerprint products: When a finger is pressed down by an optical non-living fingerprint product, colored light appears around the chip. (Note: Optical fingerprint products are also slippery, but rarely seen. It can be distinguished with the naked eye, and it is easy to have fingerprint residue. Semiconductor-based capacitive biometric fingerprinting products can be identified in various environments such as fingerprint drying, cut wounds, and wet water, and rubber and other artificial fingers cannot pass through.
Recalling the development of fingerprint recognition technology In fingerprint products, fingerprint sensors and fingerprint algorithms are the key. Fingerprint processing is the process of collecting fingerprint images and image preprocessing. Therefore, whether a clear fingerprint image can be used is the key to fingerprint processing. A fingerprint sensor is a fingerprint image acquisition component. Therefore, the performance of the fingerprint sensor directly affects the performance of the fingerprint product.
Fingerprint sensors are classified into press type and slide type fingerprint sensors according to their physical form. The main types of fingerprint sensors are semiconductor fingerprint sensors and optical fingerprint sensors. With the change of fingerprint application requirements, fingerprint sensors have also undergone three generations of technological innovations.
The first generation of optical fingerprint sensors: mainly the principle of photogrammetry and reflection collection of fingerprint images, the advantages of strong antistatic ability, low product cost, long service life, but has the inability to carry out live fingerprint identification, poor applicability to wet and dry fingers Other shortcomings, such as "fingerprints" and other simulation fingers are easy to get through, that is, non-living fingerprint recognition.
The second-generation capacitive fingerprint sensor: It can also be called a semiconductor fingerprint sensor. It mainly uses the principle of capacitance, electric field, temperature, and pressure to achieve fingerprint image acquisition.
The third generation of improved capacitive fingerprint sensor: its advantages are higher acquisition resolution, can detect the dermis of the finger, and has good applicability to wet and dry fingers, also known as live fingerprint recognition. It is understood that the main line of the Asian Touch product line is the third-generation live fingerprint recognition technology.
Everyday people see, such as fingerprint mouse, fingerprint U disk, fingerprint hard drive, fingerprint notebook, fingerprint car and other products are mostly used capacitive fingerprint sensor (especially in slide fingerprint sensor); fingerprint access control, office fingerprint attendance, etc. Applications are mostly optical push-type fingerprint sensors.
Live fingerprint recognition The so-called live fingerprint recognition is an emerging technology that uses the electrical characteristics of the human dermis to acquire the effective fingerprint eigenvalue data of the human finger. Live fingerprint recognition can penetrate into the dermal layer of human skin tissue for fingerprint identification, and simultaneously sense the temperature, humidity and other indicators of the finger when intercepting the fingerprint image, further improving the effectiveness and safety of fingerprint recognition.
We know that fingerprint recognition is based on fingerprints, and true fingerprints are formed in the dermis. The fingerprint information of the dermis is clearer and more accurate than the epidermis, and does not change with age, but is acquired under the first generation of optical fingerprinting technology. Only the texture information of the fingerprint skin, such skin fingerprints will become blurred with age. In addition, the optical mechanism determines that the fingerprint can be easily copied. As long as the texture map of the fingerprint is obtained, a fingerprint can be copied. In contrast, the living identification technology determines that the recognition object must be a living finger, even if it is the same. The texture map or the fingers that are separated from the human body cannot be identified because they do not have the electrical characteristics of the leather fingerprint.
Therefore, the biometric fingerprint recognition product can better protect the fingerprint privacy of the user and can automatically adapt to the fingerprints of wet, dry, and scratched fingers, and is safer to use. For wanting to pass illegal means such as "fingerprint sleeves", artificial fingers, rubber fingers, fingerprints Fingerprint interception, such as residual print interception, attempts to evade the identity authentication of the device can be rejected, completely lost its effect.
Finally, marketers disclosed a relatively simple method for identifying fingerprint products: When a finger is pressed down by an optical non-living fingerprint product, colored light appears around the chip. (Note: Optical fingerprint products are also slippery, but rarely seen. It can be distinguished with the naked eye, and it is easy to have fingerprint residue. Semiconductor-based capacitive biometric fingerprinting products can be identified in various environments such as fingerprint drying, cut wounds, and wet water, and rubber and other artificial fingers cannot pass through.