| 摘要 |
A pattern recognition system, pattern recognition method, and pattern recognition program capable of increasing the accuracy in computing the false acceptance probability and capable of ensuring a stable security strength are provided. Pattern recognition systems 10 and 10 a comprise a first probability computation unit 32 , and a second probability computation unit 33 coupled to the first probability computation unit 32 . The first probability computation unit 32 computes a first probability P<SUB>FCR </SUB>based on the number n of corresponding characteristic points cs 1 to csn and cf 1 to cfn indicating points corresponding between characteristic points s 1 to sn<SUB>s </SUB>in a first pattern and characteristic points f 1 to fn<SUB>f </SUB>in a second pattern. The first probability P<SUB>FCR </SUB>indicates the probability of existence of a third pattern that has a greater number of corresponding characteristic points to the first pattern than the number n of the corresponding characteristic points. The second probability computation unit 33 refers to the first probability P<SUB>FCR </SUB>to compute a false acceptance probability P<SUB>FAR </SUB>indicating the probability of falsely determining that the first pattern and the second pattern correspond to each other.
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