METHOD AND APPARATUS FOR EXTRACTING FACE FEATURE
First Claim
1. A method of extracting a face feature, the method comprising:
- calculating an average image of each of a plurality of candidates having one or more face images to which different weights are given according to an order in which the face images are acquired and calculating a total average image of all face images of the plurality of candidates;
calculating a between-class scatter matrix based on a difference between each candidate'"'"'s average image and the total average image and a within-class scatter matrix based on a difference between each candidate'"'"'s average image and each candidate'"'"'s predetermined face image of the one or more face images; and
generating a base vector that maximizes a criterion defined by a ratio between the between-class scatter matrix and the within-class scatter matrix.
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Abstract
A method and apparatus for extracting a face feature to construct a face search system having a high recognition rate are provided. The method includes calculating an average image of each of a plurality of candidates having one or more face images to which different weights are given according to an order in which the face images are acquired and calculating a total average image of all face images of the plurality of candidates, calculating a between-class scatter matrix based on a difference between each candidate'"'"'s average image and the total average image and a within-class scatter matrix based on a difference between each candidate'"'"'s average image and each candidate'"'"'s predetermined face image of the one or more face images, and generating a base vector that maximizes a criterion defined by a ratio between the between-class scatter matrix and the within-class scatter matrix.
34 Citations
14 Claims
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1. A method of extracting a face feature, the method comprising:
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calculating an average image of each of a plurality of candidates having one or more face images to which different weights are given according to an order in which the face images are acquired and calculating a total average image of all face images of the plurality of candidates; calculating a between-class scatter matrix based on a difference between each candidate'"'"'s average image and the total average image and a within-class scatter matrix based on a difference between each candidate'"'"'s average image and each candidate'"'"'s predetermined face image of the one or more face images; and generating a base vector that maximizes a criterion defined by a ratio between the between-class scatter matrix and the within-class scatter matrix. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for extracting a face feature, the apparatus comprising:
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an average image calculator calculating an average image of each of a plurality of candidates having one or more face images to which different weights are given according to an order in which the face images are acquired and calculating a total average image of all face images of the plurality of candidates; a scatter calculator calculating a between-class scatter matrix based on a difference between each candidate'"'"'s average image and the total average image and a within-class scatter matrix based on a difference between each candidate'"'"'s average image and each candidate'"'"'s predetermined face image of the one or more face images; and a base vector generator generating a base vector that maximizes a criterion defined by a ratio between the between-class scatter matrix and the within-class scatter matrix. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification