What is Biometric Face Recognition?

Biometrics (BIOMETRICS) technology refers to a technology that uses a computer's inherent physiological characteristics (fingerprints, iris, facial features, DNA, etc.) or behavioral characteristics (gait, keystroke habits, etc.) to identify individuals through computers.

The history of human beings using biometrics can be traced back to the ancient Egyptians to identify by measuring the size of various parts of the human body.

When biometric identification system uses personal characteristics to identify or verify the identity of a user, if a biometric is detected or detected as "noisy" (such as when a fingerprint has a scar or a voice is changed due to a cold), the biometric The performance of the recognition system may be impaired, and the calculation of the matching score at this time is not reliable. This problem can be solved by installing multiple sensors to capture different biometrics, which is also called biometric fusion or multi-modal biometric recognition system.

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Among all the technologies, the more noticeable and rapid development at this stage is

Currently,

After more than 40 hours after the terrorist attack in Kunming, all the criminals were arrested. The announcement of the Ministry of Public Security mentioned two major scientific and technological methods used in the detection and hunting process: DNA identification and fingerprint comparison. These two technologies are currently one of the most widely used and mature crime detection technologies in the world. During the arrest process, the government obtained criminal fingerprints by investigating the crime scene, and then continuously collected the fingerprints of suspects and checked them during the hunt to determine the whereabouts of the criminals and ensure the accuracy of the hunting direction. ^[8]

Another important application in the hunting process is the use of voiceprint recognition + communication tracking to arrest criminals. Terrorists often keep in touch with organizations and associates during their flight. At this time, through communication tracking + voiceprint recognition, the latest criminal location and identity information can be provided for investigation and pursuit. By monitoring the communications of the captured criminals, determining the identity of the people they contact, and then locating, you can quickly capture members who have missed the net. Like a fingerprint, a voiceprint is a stable and unique biological feature. Although everyone's speech acoustic characteristics can vary due to physiological, pathological, psychological and simulation, camouflage and other reasons, their voiceprint atlas is still quite stable. Modern voiceprint technology can already analyze and restore the recorded and processed sounds to determine the true identity of the speaker. ^[8]

The CIA has been using voice recognition systems to identify bin Laden's recordings. Every time bin Laden s audiovisual information is released, the US intelligence department will use voice recognition technology to identify its authenticity. In 2010, it was bin Laden s messenger Ahmed who was locked by the intelligence department during a telephone communication, which exposed Bin Laden s whereabouts . The current voice forensics technology is quite mature. In fact, as early as the 1970s, US intelligence agencies began to use this technology to monitor former Soviet leaders. ^[8]

Voiceprint recognition can be used not only to identify speakers, but also to make semantic judgments to grasp the specific actions of terrorist organizations. Of course, this application places higher demands on technology. Generally, in addition to understanding the topic of discourse at the surface level, the deep information of the dialogue needs to be identified, including the language style of specific objects. The language style is actually a series of language application characteristics formed by individuals for a long time. In November 2002, a recording of Osama bin Laden was broadcast on Al Qatar Television. On the 18th, White House spokesman Scott McClellan said, "Our intelligence experts have confirmed that the tape is real." McClellan disclosed that the CIA and NSA intelligence experts and linguists compared this recording with bin Laden's previous recordings. Soon, the Associated Press reported in detail the identification of bin Laden's language style: "The speaker used a language similar to that used in bin Laden's audio recordings in this recording, including the rhetorical style and soft voice of chapter-finding sentences. Intonation. " ^[8]