Biological pattern information processing device, biological pattern information processing method, and program
A biological pattern information processing device includes: a biological pattern information acquisition unit that acquires biological pattern information indicating a biological pattern; and a singular region detection unit that detects a singular region including damage, from the biological pattern indicated by the acquired biological pattern information.
1. A biological pattern information processing device comprising:
at least one memory configured to store instructions; and
at least one processor configured to execute the instructions to:
acquire biological pattern information including information indicating a fingerprint image;
acquire a plurality of pieces of ridge line direction information and a plurality of pieces of ridge line pitch information respectively corresponding to a plurality of regions included in the fingerprint image;
calculate an evaluation value based on the plurality of pieces of ridge line direction information and the plurality of pieces of ridge line pitch information, the evaluation value taking a greater value as a difference in ridge line directions and a difference in ridge line pitches become greater between adjacent regions in the fingerprint image; and
detect the adjacent regions as being a singular region in a case where the evaluation value is greater than a predetermined threshold value, the singular region including a damage generated by a cutting-off process.
2. A biological pattern information processing method comprising:
acquiring biological pattern information including information indicating a fingerprint image;
acquiring a plurality of pieces of ridge line direction information and a plurality of pieces of ridge line pitch information respectively corresponding to a plurality of regions included in the fingerprint image;
calculating an evaluation value based on the plurality of pieces of ridge line direction information and the plurality of pieces of ridge line pitch information, the evaluation value taking a greater value as a difference in ridge line directions and a difference in ridge line pitches become greater between adjacent regions in the fingerprint image; and
detecting the adjacent regions as being a singular region in a case where the evaluation value is greater than a predetermined threshold value, the singular region including a damage generated by a cutting-off process.
3. A non-transitory computer-readable recording medium storing a program that causes a computer to execute:
acquiring biological pattern information including information indicating a fingerprint image;
acquiring a plurality of pieces of ridge line direction information and a plurality of pieces of ridge line pitch information respectively corresponding to a plurality of regions included in the fingerprint image;
calculating an evaluation value based on the plurality of pieces of ridge line direction information and the plurality of pieces of ridge line pitch information, the evaluation value taking a greater value as a difference in ridge line directions and a difference in ridge line pitches become greater between adjacent regions in the fingerprint image; and
detecting the adjacent regions as being a singular region in a case where the evaluation value is greater than a predetermined threshold value, the singular region including a damage generated by a cutting-off process.