Fingerprint / face / iris / heart rate / voice recognition advantages comparison
With the emergence of biometrics in the commercial field, more and more biometric technology devices or functions have been applied. In addition to the common fingerprint locks in the field of smart locks, face recognition locks, pupil recognition smart locks, Vein recognition smart locks, etc. But what are the characteristics of various biometric technologies?
Medical evidence shows that each person's fingerprint pattern is distinct in pattern, breakpoint and intersection, unique and permanent. Fingerprint recognition technology collects fingerprint feature images through optical, semiconductor electronic signals, ultrasonic waves, temperature differences, etc. After digitization and analysis, it is finally extracted as acceptable fingerprint digital feature information, which is used as a reference template or directly for comparison. After years of development and market validation, fingerprint identification technology is a relatively mature and widely used biometric technology with certain advantages.
Advantages of fingerprint recognition technology:
1. Practicality: The fingerprint is easy to collect and use, the fingerprint head is small, and the collection cost is low, which can be applied to a variety of devices;
2. Good stability: fingerprint recognition technology is more mature. After long-term market inspection, and fingerprint itself is unique and permanent, fingerprint recognition is stable and reliable;
3. Good convenience: the speed of scanning fingerprints is very fast, and it is very convenient to use; 4. The fingerprint identification product has better cost performance: the fingerprint collection head is more compact and cheaper.
Face recognition technology Face recognition technology, also known as face recognition technology. People's faces are different, and differences can be found either by anthropological methods measured by a pair of twins. The face recognition technology analyzes the orientation of various organs and feature parts of the face through "local feature analysis" and "graphics and neural recognition algorithm", extracts the digitized information and compares, judges and confirms with the template information in the database.
Advantages of face recognition technology: Face recognition is proactive, people can be identified without touching the device, and even face recognition can actively identify people without people's knowledge.
Disadvantages of face recognition technology:
1. Low accuracy: The current face recognition method mainly focuses on two-dimensional images. Due to the influence of illumination, posture and expression changes, the accuracy of recognition is greatly limited.
2. Higher cost: The improvement of face recognition technology relies on the improvement of extraction features and comparison techniques, and the equipment for acquiring images is more expensive.
Iris recognition technologyThe iris is located behind the cornea. Before the crystal, the structure of the iris is stable. The color is different depending on the amount and distribution of the pigment. The iris recognition system uses the monochrome video and the video method combined with the camera technology to acquire the digital information of the iris. The information scanned during verification is compared with the pre-stored template information for identification.
Advantages of iris recognition technology: Biometric collection is more convenient.
Disadvantages of iris recognition technology:
1. The application popularity program is low: the iris recognition system has been tested a lot, but there is no larger-scale application;
2. Higher cost: the image acquisition device is large; the camera is expensive.
Heart rate recognitionHeartbeat recognition is a similar principle, because a person's heartbeat rhythm is generally stable, and each person's heartbeat shape is different and does not change. Even if people's heart beats faster, the overall shape of the heartbeat will not change, but once it identifies the person's identity. Heart rate recognition technology is a photoelectric sensing measurement method that utilizes light reflection, such as pulse measurement based on photoelectric technology; and the other is electrode sensing measurement using potential.
The advantages of heart rate recognition technology: strong practicality, small heart rate recognizer, can be applied to a variety of devices, and even carry it with you.
Disadvantages of heart rate recognition technology: the accuracy of heart rate recognition needs to be improved, and the body is photoelectric mode detection.
Voice recognition technology The speech parameters of human physiological, psychological and behavioral characteristics are reflected in the human speech waveform, and the human voice spectrum includes the time variation of the curve and the characteristics of the driving sound source. It is possible to extract features that vary greatly in human speech and have little change in speech in the same person for analysis, comparison, and identification.
At present, the mainstream voice recognition system application is: inputting human voice through a microphone, digital image processor digitization and software compression, extracting sound image information and storing it in a database, and the sound sound and the characteristics in the database will be collected immediately when applied. Information is matched and identified.
Advantages of voice recognition technology:
1. Voice recognition is a non-contact recognition technology that users can accept naturally;
2. Sound recognition technology has better convenience, economy and accuracy.
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