Patent ID: 8411913

Claim:
A method for partial fingerprint recognition performed using a computer or a processor, the method comprising the steps of: extracting features including ridge orientations, valley images, minutiae, and pores from at least two fingerprint fragments; aligning the fingerprint fragments; matching the pores and minutiae on the fingerprint fragments after applying estimated alignment transformation; calculating a final matching score based on a pore matching score and a minutiae matching score; and identifying a person based on a result of the final matching score, wherein the extraction of the pores further comprising: dividing the fingerprint fragments into blocks; identifying two spatial filters for each of the blocks based on ridge frequencies in the block; using the spatial filters to generate block-wise image response; thresholding the block-wise image response and estimate a difference, which generates initial pore extraction results; and post-processing the initial pore extraction results to eliminate spurious pores.