What is the false rejection rate and false recognition rate of smart lock fingerprint recognition?
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With the popularity of smart locks, we often encounter various problems when purchasing smart locks. We can’t understand some professional terms about fingerprint locks, such as the false rejection rate and false recognition rate of smart lock fingerprint recognition. ? Let's introduce what is the false rejection rate and false recognition rate of the fingerprint lock.

Simply put, the false rejection rate of smart lock fingerprint recognition is the same fingerprint, which is recognized as different by the algorithm; the false recognition rate of smart lock fingerprint recognition is different fingerprints, which are recognized as the same by the algorithm.

          The rejection rate and false recognition rate of smart lock fingerprint recognition can also be called rejection rate and false recognition rate. The false rejection rate is FRR, that is, the real fingerprint image is regarded as fake. The false recognition rate is FAR, that is, the false fingerprint image is recognized as real. Affecting the rejection rate and false recognition rate of the fingerprint lock fingerprint head is related to the resolution of the fingerprint head collection window and the way of acquiring fingerprints in fingerprint identification technology.

The rejection rate and false recognition rate of the fingerprint recognition of the smart lock are important indicators for evaluating the quality of the fingerprint head of the fingerprint lock. The rejection rate and the false recognition rate of the fingerprint recognition of the smart lock directly affect the response time of the fingerprint lock and fingerprint recognition The accuracy of the fingerprint lock will affect the user’s experience and the security performance of the fingerprint lock.

At present, the resolution ratio of fingerprint heads on the market is above 500DPI, that is, there are 500 pixels per inch. In theory, there are 500 information points per inch of fingerprint image for comparison and identification.

Previously, the standards for the rejection rate and the false admission rate issued by the Ministry of Public Security were: the rejection rate should be =<3%, and the false admission rate=<0.001%. According to relevant standards, the security level of smart locks for household entrance doors should be level 3, that is, rejection rate <0.1% and false recognition rate = <0.001%. The resolution of the fingerprint head used in many smart lock brand promotion is roughly within this range. The specific indicators may differ, but as long as it is a brand manufacturer’s product, the user experience will not be very different.

There is a trade-off between "rejection rate and false recognition rate". At the same level, if the rejection rate is high, the false recognition rate is low, and vice versa. This is an inverse relationship. But if the process and technical level are improved, these two indicators can be lowered, and the technical level must be improved in essence. However, in order to speed up the certification, some manufacturers use the practice of lowering the security level to create false images with fast speed and strong recognition ability at the expense of security. This situation is more common in some model locks or demonstration locks. For some model locks, please don't buy them cheaply.