Method for reducing false reject rate of fingerprint comparison

A technology of rejection rate and fingerprints, applied in the fields of instruments, character and pattern recognition, computer parts, etc., can solve the problems of high rejection rate of fingerprint comparison and small fingerprint area, and achieve improved adaptability and low rejection rate. , the effect of strong environmental adaptability

Active Publication Date: 2011-11-23
HANGZHOU SYNOCHIP DATA SECURITY TECH CO LTD
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Problems solved by technology

[0014] The purpose of the present invention is to solve the deficiencies of the above-mentioned technologies, that is, to solve the problem that the fingerprint sensor collects fingerprints with a small area, different fingerprints are collected each time, environmental changes, sensor aging and other factors cause a very high rejection rate when comparing fingerprints. , and provide a method to reduce the rejection rate of fingerprint comparison

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  • Method for reducing false reject rate of fingerprint comparison
  • Method for reducing false reject rate of fingerprint comparison
  • Method for reducing false reject rate of fingerprint comparison

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Embodiment Construction

[0042] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0043] Aiming at the shortcomings of the original technology, the present invention adds an auxiliary template, and dynamically updates (replaces) the auxiliary template during the application process, which greatly improves the adaptability of the sensor to the environment, improves the anti-aging ability, and increases the number of comparison objects In this way, the rejection rate is effectively reduced; at the same time, the fingerprint comparison auxiliary threshold interval, the fingerprint features in this interval need to be compared with the fingerprint template one by one, and it is found that the comparison scores of more than two features are in this interval If it is within, it is judged that the comparison is passed, which effectively reduces the rejection rate of the fingerprint comparison under the condition of ensuring that the fingerprint is...

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Abstract

The invention relates to a method for reducing the false reject rate of fingerprint comparison. The method comprises the following steps of: extracting fingerprint characteristics by a fingerprint sensor; quickly searching in a plurality of templates, and comparing the templates with the existing template to obtain the highest comparison score; and judging whether comparison passes according to acomparison passing rule, and replacing the templates or not according to an auxiliary template replacement rule. The method has the advantages that: an auxiliary template is added and dynamically updated in an application process, so the capacity for environmental adaptation of the sensor is greatly improved, anti-aging capacity is improved, the range of a comparison object is expanded, and the false reject rate is effectively reduced; the fingerprint characteristics in a fingerprint comparison auxiliary threshold interval are required to be compared with fingerprint templates one by one; andwhen more than two characteristic comparison scores are in the fingerprint comparison auxiliary threshold interval, comparison is determined to pass, so the false reject rate of the fingerprint comparison is effectively reduced under the condition that no false accepting is guaranteed.

Description

technical field [0001] The invention relates to the application field with a high rejection rate of a fingerprint sensor, in particular to a method for reducing the rejection rate of fingerprint comparison. Background technique [0002] With the development of society, information security is becoming more and more important, and human body feature recognition technology is also becoming more and more important. Applying fingerprint locks to notebooks, chassis and even mice can protect files and systems and carry out identity recognition. However, most fingerprint security products are faced with the problem of a very high rejection rate during fingerprint comparison due to factors such as the small fingerprint area collected by the fingerprint sensor, different parts of the fingerprint collected each time, environmental changes, and sensor aging. [0003] Concise steps for existing protocols (such as figure 1 shown): [0004] Step 1: Power on the system, the main controll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
Inventor 马震伟郭志杨繁
Owner HANGZHOU SYNOCHIP DATA SECURITY TECH CO LTD
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