What are the characteristics of fingerprint, face, iris, heart rate, and voice recognition
Time:2023-08-31
Views:716
With the continuous emergence of biometric technology in the commercial field, more and more biometric technology devices or functions are being applied by people. In the field of smart locks, in addition to common fingerprint locks, there have also been facial recognition locks, pupil recognition smart locks, vein recognition smart locks, and so on. However, what are the characteristics of various biometric technologies?
Fingerprint recognition technology
Medical evidence shows that each person‘s fingerprint pattern is unique and permanent in terms of patterns, breakpoints, and intersections. Fingerprint recognition technology collects fingerprint features and images through optical, semiconductor electronic signals, ultrasound, temperature differences, and other methods. After digital processing and analysis, it is ultimately extracted into acceptable fingerprint digital feature information, which is used as a reference template or directly for comparison. Fingerprint recognition technology has undergone years of development and market validation, and is currently the most mature and widely used biometric technology with certain advantages.
The advantages of fingerprint recognition technology:
1. Strong practicality: The collection and use of fingerprints are relatively convenient, with small fingerprint head volume and low collection cost, which can be applied to various devices;
2. Good stability: Fingerprint recognition technology is relatively mature, has undergone long-term market testing, and the fingerprint itself has uniqueness and permanence, so fingerprint recognition is relatively stable and reliable;
3. Good convenience: The speed of scanning fingerprints is fast and very convenient to use; 4. Fingerprint recognition products have good cost-effectiveness: the fingerprint capture head is more miniaturized and affordable.
Face recognition technology
Face recognition technology, also known as facial recognition technology. People have different facial features, and differences can be detected by anthropological measurements of a pair of twins. Face recognition technology analyzes the orientation of various organs and feature parts of the face through "local feature analysis" and "graphic and neural recognition algorithms", extracts digital information, and compares, judges, and confirms it with template information in the database.
The advantages of facial recognition technology: facial recognition has initiative, allowing people to be recognized without touching devices, and even facial recognition can actively recognize people without their knowledge.
Disadvantages of facial recognition technology:
1. Low accuracy: Currently, face recognition methods mainly focus on two-dimensional images. Due to the influence of lighting, posture, and facial expression changes, the accuracy of recognition is greatly limited;
2. High cost: The improvement of facial recognition technology relies on the improvement of feature extraction and comparison technology, and the equipment for collecting images is relatively expensive.
Iris recognition technology
The iris is located behind the cornea and before the lens, and its structure is stable. Its color varies depending on the amount and distribution of pigments it contains. The iris recognition system uses a video method combining monochromatic television and camera technology with software to obtain digital information of the iris. The scanned information during verification is compared with the pre stored template information to make identity identification.
The advantages of iris recognition technology:
The collection of biological features is relatively convenient.
Disadvantages of iris recognition technology:
1. The application popularization program is relatively low: The iris recognition system has undergone many tests, but has not yet been applied on a larger scale;
2. High cost: Image acquisition equipment is highly recommended; Cameras are expensive.
Heart rate recognition technology
Heartbeat recognition is also based on a similar principle, as a person‘s heartbeat rhythm is generally stable, and the shape of each person‘s heartbeat is different and does not change. Even if people‘s heartbeat accelerates, the overall shape of their heartbeat remains unchanged, and they can identify a person‘s identity at once. Heart rate recognition technology is a photoelectric sensing measurement method that utilizes light reflection, such as pulse measurement based on photoelectric technology; Another method is electrode sensing measurement using electric potential.
The advantages of heart rate recognition technology: strong practicality, small size of heart rate recognition device, can be applied to various devices, and even portable.
Disadvantages of heart rate recognition technology:
The accuracy of heart rate recognition needs to be improved, specifically through photoelectric detection.
Voice recognition technology
The physiological, psychological, and behavioral characteristics of human speech are reflected in the waveform of human speech, and the frequency spectrum of human speech, including the temporal changes of curves and the characteristics of driving sound sources, vary. It is possible to extract features with significant speech changes from different individuals and minimal changes from the same person for analysis, comparison, and recognition.
At present, the mainstream application of voice recognition systems is to input human voice through microphones, digitize and compress it through digital signal processors and software, extract sound and image information, and save it in a database. When applying, the real-time collected sound is matched with the feature information in the database for identity authentication.
The advantages of voice recognition technology:
1. Voice recognition is a non-contact recognition technology that users can naturally accept;
2. Sound recognition technology has good convenience, economy, and accuracy.
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