Fingerprint identification apparatus and fingerprint identification method

A fingerprint identification method comprising the steps of:

• collating positions in prerecorded fingerprint templates with positions in collation fingerprint information, wherein the collation fingerprint information is input for comparison with the templates,
• calculating the degree of matching between data in the templates and data in the collation fingerprint information;
• extracting collation positions based on the calculated degree of matching at each position within the collation fingerprint information, the collation positions indicating the position of the prerecorded fingerprint templates relative to the collation fingerprint information;
• calculating address differences between the prerecorded fingerprint templates and a reference template;
• generating corrected coordinates by adding the address differences to the collation positions;
• and
• determining whether or not identity is established between one or more of the prerecorded fingerprint templates and the collation fingerprint information by calculating the number of prerecorded fingerprint templates for which the corrected coordinates differ by less than an allowable positional shift.

A computer-readable recording medium containing a program for controlling a computer to execute the steps of:

• collating positions in prerecorded fingerprint templates with positions in collation fingerprint information, wherein the collation fingerprint information is input for comparison with the templates;
• calculating the degree of matching between data in the templates and data in the collation fingerprint information;
• extracting collation positions based on the calculated degree of matching at each position with the collation fingerprint information, the collation positions indicating the position of the prerecorded fingerprint templates relative to the collation fingerprint information;
• calculating address differences between the prerecorded fingerprint templates and a reference template;
• generating corrected coordinates by adding the address differences to the collation positions;
• and
• determining whether or not identity is established between one or more of the prerecorded fingerprint templates and the collation fingerprint information by calculating the number of prerecorded fingerprint templates for which the corrected coordinates differ by less than an allowable positional shift.

A computer readable program product, adapted to be executed by said computer for executing the steps of:

• collating positions in prerecorded fingerprint templates with positions in collation fingerprint information, wherein the collation fingerprint information is input for comparison with the templates;
• calculating the degree of matching between data in the templates and data in the collation fingerprint information;
• extracting collation positions based on the calculated degree of matching at each position within the collation fingerprint information, the collation positions indicating the position of the prerecorded fingerprint templates relative to the collation fingerprint information;
• address distance calculating means for calculating address differences between the prerecorded fingerprint templates and a reference template;
• generation means for generating corrected coordinates by adding the address differences to the collation positions;
• and
• determining whether or not identity is established between one or more of the prerecorded fingerprint templates and the collation fingerprint information by calculating the number of prerecorded fingerprint templates for which the corrected coordinates differ by less than an allowable positional shift.