G - Physics – 06 – K
Patent
G - Physics
06
K
G06K 9/36 (2006.01) G06K 9/00 (2006.01) G06K 9/80 (2006.01)
Patent
CA 2340813
The invention describes a method for fingerprint verification using a portable device with low data memory requirements and low power consumption. The enrollment part of the method includes sorting information contained in a fingerprint image into alignment information and verification information. The latter may comprise a set of "tiles" extracted from different parts of the image in the pre-determined locations, the size of said "tiles" and of the alignment information being considerably smaller than of the entire image. An optimization procedure including, in particular, generating a composite filter, may be applied to create an enrollment template. The verification part of the method includes extracting alignment information from a candidate image, utilizing said alignment information to align the candidate image with the enrolled one to obtain the adjusted "tile" locations for the candidate image. The next step includes extracting the "tiles" of the same size and orientation as on the enrollment from the candidate image and matching each "tile" with the corresponding "tile" on the enrollment. A set of matching parameters is obtained for each "tile". The final match/non-match decision is based on multivariable decision boundaries approach. Since the alignment information and each "tile" is processed in a consecutive way, the memory and, accordingly, the power consumption requirements for the hardware are significantly reduced. This allows the invention to be used with a portable device.
Soutar Colin
Stoianov Alexei
Fetherstonhaugh & Co.
Mytec Technologies Inc.
Soutar Colin
Stoianov Alexei
LandOfFree
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