Method and apparatus for generating face descriptor using extended local binary patterns, and method and apparatus for face recognition using extended local binary patterns

A face recognition method comprising:

• (a) extracting extended local binary pattern (LBP) features from a training face image;
• (b) performing a supervised learning process on the extended LBP features of the training face image so as to select efficient extended LBP features for face image classification and constructing a LBP feature set based on the selected extended LBP features;
• (c) applying the constructed LBP feature set to an input face image and a target face image so as to extract LBP features from each of the face images;
• (d) generating a face descriptor of the input face image and the target face image by using the LBP features extracted in (c) and the LBP feature set;
• and
• (e) determining whether or not the generated face descriptors of the input face image and the target face image have a predetermined similarity.

A face descriptor generating apparatus comprising:

• a first LBP feature extracting unit which extracts extended local binary pattern (LBP) features from a training face image;
• a selecting unit which selects the extended LBP features by performing a supervised learning process for face-image-classification on the extracted LBP features and constructs a LBP feature set based on the selected extended LBP;
• a second LBP feature extracting unit which applies the constructed LBP feature set to an input face image so as to extract LBP features from the input face image;
• and
• a face descriptor generating unit which generates a face descriptor by using the LBP features extracted by the second LBP feature extracting unit.

A face recognition apparatus comprising:

• a LBP feature extracting unit which extracts extended local binary pattern (LBP) features from a training face image;
• a selecting unit which selects the extended LBP features by performing a supervised learning process on the extended LBP features of the training face image and constructs a LBP feature set including the selected LBP features;
• an input-image LBP feature extracting unit which applies the constructed LBP feature set to an input face image so as to extract LBP features;
• a target-image LBP feature extracting unit which applies the constructed LBP feature set to a target face image so as to extract LBP features;
• a face descriptor generating unit which generates face descriptors of the input face image and the target face images by using the LBP features extracted from the input face image, the target face image, and the LBP feature set;
• and
• a similarity determining unit which determines whether or not the face descriptors of the input face image and the target face image have a predetermined similarity.