Systems and methods for improved biometric feature definition
AssigneeLumidigm, Inc.
InventorRobert K. Rowe
Life of this patent
Estimating the term…
Abstract
Methods and systems are provided for performing a biometric function. A purported skin site of an individual is illuminated under distinct optical conditions during a single illumination session for a fixed position of the purported skin site. Light from the purported skin site is received for each of the optical conditions. Images of the purported skin site are generated from the received light. The images are analyzed to identify a biometric feature as a characteristic in a portion of at least one of the images. The biometric function is implemented in accordance with an identification of the biometric feature.
Claims30
A method of performing a biometric function, the method comprising:
- illuminating a purported skin site of an individual under a plurality of distinct optical conditions for a substantially fixed position of the purported skin site;
- focusing an imager at a first focal plane of the purported skin site;
- receiving light at the imager from the first focal plane of the purported skin site;
- focusing the imager at a second focal plane of the purported skin site;
- receiving light at the imager from the second focal plane of the purported skin site;
- generating a plurality of multispectral images of the purported skin site from the light received from the first focal plane and the second focal plane;
- and
- identifying a biometric feature using the plurality of multispectral images.
A biometric system comprising:
- a platen adapted for placement of a purported skin site by an individual;
- an illumination source disposed to illuminate the purported skin site under a plurality of distinct optical conditions when placed on the platen;
- an imaging system configured to focus at a first focal plane of the purported skin site during a first focusing event, and configured to focus at a second focal plane of the purported skin site during a second focusing event;
- and
- a controller interfaced with the illumination source and the imaging system, the controller including:
- instructions to illuminate the purported skin site with the illumination source during an illumination session for a substantially fixed position of the purported skin site;
- instructions to focus the imaging system at a first focal plane of the purported skin site;
- instructions to capture light at the imaging system from the first focal plane of the purported skin site separately for each of the plurality of distinct optical conditions;
- instructions to focus the imaging system at a second focal plane of the purported skin site;
- instructions to capture light at the imaging system from the second focal plane of the purported skin site separately for each of the plurality of distinct optical conditions from the second focal plane of the purported skin site;
- instructions to generate a plurality of multispectral images of the purported skin site from the light received by the imaging system from at least the first focal plane and the second focal plane of the purported skin site;
- and
- instructions to identify a biometric feature using the plurality of multispectral images.
Dependencies are inferred from the claim text.