Method and apparatus for extracting facial features from image containing face
First Claim
1. A method of extracting facial features from an image containing a face, the method comprising:
- (a) filtering the image using a filter set for face recognition at each of predetermined locations in the image, the filtering including filtering one or more pairs of first values filtered at horizontally symmetrical locations from among the predetermined locations;
(b) merging each pair of the first values filtered at the horizontally symmetrical locations from among the predetermined locations, wherein the horizontally symmetrical locations are horizontally symmetrical to each other with respect to a longitudinal axis disposed along a center of the face, into second values representing the each pair of the first values at the horizontally symmetrical locations; and
(c) synthesizing third values filtered at locations, which are not horizontally symmetrical locations, from among the predetermined locations, with the second values, when the predetermined locations include locations other than the horizontally symmetrical locations.
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Abstract
Provided are a method and apparatus for extracting facial features from an image containing a face. The method and apparatus filter an input image using a filter set for face recognition at each of predetermined locations in the input image, merge values obtained by filtering the input image at locations, which are horizontally symmetrical to each other with respect to the center of the face, and synthesize values obtained by filtering the input image at locations which are not symmetrical to each other with respect to the center of the face with the merged values. Therefore, the time, feature values, and storage space required to extract or compare facial features can be significantly reduced. In addition, a face recognition system that runs well on low specification hardware can be implemented.
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Citations
15 Claims
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1. A method of extracting facial features from an image containing a face, the method comprising:
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(a) filtering the image using a filter set for face recognition at each of predetermined locations in the image, the filtering including filtering one or more pairs of first values filtered at horizontally symmetrical locations from among the predetermined locations; (b) merging each pair of the first values filtered at the horizontally symmetrical locations from among the predetermined locations, wherein the horizontally symmetrical locations are horizontally symmetrical to each other with respect to a longitudinal axis disposed along a center of the face, into second values representing the each pair of the first values at the horizontally symmetrical locations; and (c) synthesizing third values filtered at locations, which are not horizontally symmetrical locations, from among the predetermined locations, with the second values, when the predetermined locations include locations other than the horizontally symmetrical locations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for extracting facial features from an image containing a face, the apparatus comprising:
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a filtering unit filtering the image using a filter set for face recognition at each of predetermined locations in the image, wherein the filtering unit filters one or more pairs of first values filtered at horizontally symmetrical locations from among the predetermined locations; a merging unit merging, using at least one processor, each pair of the first values filtered at the horizontally symmetrical locations from among the predetermined locations, wherein the horizontally symmetrical locations are horizontally symmetrical to each other with respect to a longitudinal axis disposed along a center of the face, into second values representing the each pair of the first values at the horizontally symmetrical locations; and a synthesis unit synthesizing third values filtered at locations, which are not horizontally symmetrical locations, from among the predetermined locations, with the second values, when the predetermined locations include locations other than the horizontally symmetrical locations. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification