Patent ID: 8605962

Claim:
A pattern matching system comprising: a template storage unit configured to store a template pattern; a feature extraction unit configured to extract features of an input pattern; and a matching unit configured to perform a first matching in which a first feature not changing with time among said features of said input pattern is matched with said template pattern and a second matching other than said first matching, in which a second feature changing with time among said features of said input pattern is matched with said template pattern, wherein said template pattern storage unit includes: a time-unchanged template storage unit configured to store a feature which does not change with time among features of said template pattern; and a time-change template storage unit configure to store a feature which changes with time among said features of said template pattern, and said matching unit matches said first feature with said feature stored in said time-unchanged template storage unit in said first matching and matches said second feature with said feature stored in said time-change template storage unit in said second matching, and wherein the pattern matching system further comprises a matching result judgment unit configured to judge whether or not said input pattern and said template pattern have identity based on a first matching result of said first matching and a second matching result of said second matching, wherein said matching result judgment unit judges said first matching result with use of a first parameter for determining a range of identity and judges said second matching result with use of a second parameter for determining a range of identity, and said second parameter is a different parameter from said first parameter, and wherein when judging said second matching result, said matching result judgment unit changes said second parameter based on a time interval from storage of said template pattern to an input of said input pattern.