Collation apparatus, collation method, and computer readable recording medium
AssigneeNEC Corporation
InventorKazuhisa ISHIZAKA
Life of this patent
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Abstract
A collation apparatus 1 includes: a vector-type arithmetic unit 2 that calculates first similarity degrees using first feature points extracted from a target biological image and second feature points in a plurality of registered biological images, and narrows down the registered biological images based on the calculated first similarity degrees; and an arithmetic unit 3, other than the vector-type arithmetic unit 2, that calculates second similarity degrees using third feature points extracted from the target biological image and fourth feature points in the registered biological images obtained by the narrowing-down, and specifies a registered biological image based on the calculated second similarity degrees.
Claims12
A collation apparatus comprising:
- a vector-type arithmetic unit configured to calculate first similarity degrees using first feature points extracted from a target biological image and second feature points in a plurality of registered biological images, and narrow down the registered biological images based on the calculated first similarity degrees;
- and
- an arithmetic unit, other than the vector-type arithmetic unit, configured to calculate second similarity degrees using third feature points extracted from the target biological image and fourth feature points in the registered biological images obtained by the narrowing-down, and specify a registered biological image based on the calculated second similarity degrees.
A collation method comprising:
- using a vector-type arithmetic unit to calculate first similarity degrees using first feature points extracted from a target biological image and second feature points in a plurality of registered biological images, and narrow down the registered biological images based on the calculated first similarity degrees;
- and
- using an arithmetic unit, other than the vector-type arithmetic unit, to calculate second similarity degrees using third feature points extracted from the target biological image and fourth feature points in the registered biological images obtained by the narrowing-down, and specify a registered biological image based on the calculated second similarity degrees.
A non-transitory computer readable recording medium that includes recorded thereon:
- a first program including instructions that cause a vector-type arithmetic unit to carry out a step of calculating first similarity degrees using first feature points extracted from a target biological image and second feature points in a plurality of registered biological images, and narrowing down the registered biological images based on the calculated first similarity degrees;
- and
- a second program including instructions that cause an arithmetic unit, other than the vector-type arithmetic unit, to carry out a step of calculating second similarity degrees using third feature points extracted from the target biological image and fourth feature points in the registered biological images obtained by the narrowing-down, and specifying a registered biological image based on the calculated second similarity degrees.
Dependencies are inferred from the claim text.