| 摘要 |
[Problem] To extract a fingerprint core for alignment of a fingerprint image for fingerprint matching. [Solution] The present invention comprises: a core extraction unit (24) which has an endpoint processing function (5) of generating an endpoint image by extracting branch points in a core line image and subjecting the respective branch points to endpoint processing; and a core line image generation/extraction unit (23) which extracts core lines of a density-inverted image formed by inverting the density colors of the generated end point image from white to black and vice versa, and performs processing for generating the core line image, the core extraction unit (24) being provided with a core determination function (4) of specifying a core line pixel having the highest value of a loop score indicating the degree of a bend in a core line shape in the density-inverted image, and defining this core line pixel as the finger print core. |
