Image based multi-biometric system and method
First Claim
Patent Images
1. A face recognition method, the method performed by a computer and comprising:
- selecting a single image of a face;
locating facial features in the single image;
determining whether a plurality of the located facial features lie within a plane;
responsive at least in part to determining whether the plurality of the located facial features lie within a plane, determining whether the single image represents a recorded image of an individual;
responsive at least in part to determining that the single image does not represent a recorded image of an individual;
comparing facial features located in the single image with facial features of a reference image;
comparing iris features in the single image with iris features in the reference image;
comparing skin characteristics in the single image with skin characteristics in the reference image, the comparison of skin characteristics comprising;
locating skin areas in the face suitable for skin texture analysis;
responsive to locating the facial features, detecting deformation of the located skin areas;
responsive to detecting the deformation, warping, aligning, and normalizing the located skin areas to account for the deformation, resulting in modified skin areas; and
extracting skin characteristics from the modified skin areas;
calculating a similarity score between the single image and the reference image based on the facial feature comparison, the iris feature comparison, and the skin characteristics comparison; and
recognizing the face based at least in part on the calculated similarity score.
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Abstract
This disclosure describes methods to integrate face, skin and iris recognition to provide a biometric system for identifying individuals. These methods only require a digital image depicting a human face as source data.
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Citations
17 Claims
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1. A face recognition method, the method performed by a computer and comprising:
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selecting a single image of a face; locating facial features in the single image; determining whether a plurality of the located facial features lie within a plane; responsive at least in part to determining whether the plurality of the located facial features lie within a plane, determining whether the single image represents a recorded image of an individual; responsive at least in part to determining that the single image does not represent a recorded image of an individual; comparing facial features located in the single image with facial features of a reference image; comparing iris features in the single image with iris features in the reference image; comparing skin characteristics in the single image with skin characteristics in the reference image, the comparison of skin characteristics comprising; locating skin areas in the face suitable for skin texture analysis; responsive to locating the facial features, detecting deformation of the located skin areas; responsive to detecting the deformation, warping, aligning, and normalizing the located skin areas to account for the deformation, resulting in modified skin areas; and extracting skin characteristics from the modified skin areas; calculating a similarity score between the single image and the reference image based on the facial feature comparison, the iris feature comparison, and the skin characteristics comparison; and recognizing the face based at least in part on the calculated similarity score. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A face recognition apparatus, comprising:
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means for selecting a first image of a face; means for locating a first set of facial features in the first image; means for selecting a second image of the face; means for locating a second set of facial features in the second image, the second set of facial features corresponding to the facial features of the first set of facial features; means for measuring a degree of change between the diameter of a pupil of an eye of the first image and the diameter of a pupil of an eye of the second image; means for determining that the first image represents a real-time image of a living individual, responsive at least in part to the measured degree of change; means for comparing the first set of facial features with facial features of a reference image, responsive at least in part to determining that the single image represents a real-time image of a living individual; means for comparing iris features in the first image with iris features in the reference image, responsive at least in part to determining that the single image represents a real-time image of a living individual; means for comparing skin characteristics of the first image with skin characteristics of the reference image, the comparison of skin characteristics comprising; locating skin areas in the first image suitable for skin texture analysis; responsive to locating the first set of facial features, detecting deformation of the located skin areas; responsive to detecting the deformation, warping, aligning, and normalizing the located skin areas to account for the deformation, resulting in modified skin areas; and extracting skin characteristics from the modified skin areas; means for calculating a similarity score between the single image and the reference image based on the facial feature comparison, the iris feature comparison, and the skin characteristics comparison, responsive at least in part to determining that the single image represents a real-time image of a living individual; and means for recognizing the face based at least in part on the calculated similarity score. - View Dependent Claims (8, 9, 10, 11)
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12. A computer readable storage medium storing a computer program executable by a processor for performing face recognition, the actions of the computer program comprising:
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selecting a single image of a face; locating facial features in the single image; determining whether a plurality of the located facial features lie within a plane; responsive at least in part to determining whether the plurality of the located facial features lie within a plane, determining whether the single image represents a recorded image of an individual; responsive at least in part to determining that the single image does not represent a recorded image of an individual; comparing facial features located in the single image with facial features of a reference image; comparing iris features in the single image with iris features in the reference image; comparing skin characteristics in the single image with skin characteristics in the reference image, the comparison of skin characteristics comprising; locating skin areas in the face suitable for skin texture analysis; responsive to locating the facial features, detecting deformation of the located skin areas; responsive to detecting the deformation, warping, aligning, and normalizing the located skin areas to account for the deformation, resulting in modified skin areas; and extracting skin characteristics from the modified skin areas; calculating a similarity score between the single image and the reference image based on the facial feature comparison, the iris feature comparison, and the skin characteristics comparison; and recognizing the face based at least in part on the calculated similarity score. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification