Patent ID: 11922719
Assignee: NEC CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 7:
8. An image processing method comprising:
discriminating, by a processor, a valid region and an invalid region in a fingerprint image which is input, and extracting first skeleton lines in the valid region and in the invalid region, by using a first skeleton extraction technique;
extracting, by the processor, second skeleton lines in the invalid region by using a second skeleton extraction technique;
integrating, by the processor, the first skeleton lines and the second skeleton lines based on a comparison in reliability between the first skeleton lines extracted in the invalid region by using the first skeleton extraction technique and the second skeleton lines extracted in the invalid region by using the second extraction technique; and
generating, by the processor, a skeleton image corresponding to the fingerprint image and including the integrated first skeleton lines.