Method of extracting feature of input image based on example pyramid, and facial recognition apparatus
First Claim
Patent Images
1. A method of extracting a feature of an input image, the method comprising:
- constructing an example pyramid including at least two hierarchical levels based on stored example images which include face images of different users;
generating a codebook in each of the at least two hierarchical levels;
calculating a similarity between each codebook and the input image; and
extracting a feature of the input image based on the similarity,wherein the example pyramid is constructed using example image groups generated for each of the at least two hierarchical levels by clustering a feature vector of the stored example images based on a distance in a feature space.
1 Assignment
0 Petitions
Accused Products
Abstract
At least one example embodiment discloses a method of extracting a feature of an input image. The method includes constructing an example pyramid including at least one hierarchical level based on stored example images, generating a codebook in each of the at least one hierarchical level, calculating a similarity between the codebook and the input image, and extracting a feature of the input image based on the similarity.
-
Citations
23 Claims
-
1. A method of extracting a feature of an input image, the method comprising:
-
constructing an example pyramid including at least two hierarchical levels based on stored example images which include face images of different users; generating a codebook in each of the at least two hierarchical levels; calculating a similarity between each codebook and the input image; and extracting a feature of the input image based on the similarity, wherein the example pyramid is constructed using example image groups generated for each of the at least two hierarchical levels by clustering a feature vector of the stored example images based on a distance in a feature space. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 20, 21)
-
-
12. A facial recognition apparatus comprising:
-
at least one processor configured to execute computer readable instructions to, extract a facial area from an input image; perform normalization on the facial area; extract a feature of the input image based on the normalized facial area and a stored codebook; recognize a face based on the extracted feature, the stored codebook is based on example image groups, the example image groups are in each level of an example pyramid using stored example images which include face images of different users; and construct the example pyramid using the example image groups by clustering a feature vector of the stored example images based on a distance in a feature space; and generate the stored codebook for the example image groups in each of at least two hierarchical levels of the example pyramid. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 22, 23)
-
Specification