US 7,321,670 B2
System and method for detecting face
Sang-min Yoon, Kyungki-do (Korea, Republic of); and Seok-cheol Kee, Kyungki-do (Korea, Republic of)
Assigned to Samsung Electronics Co., Ltd., Suwon, Kyungki-do (Korea, Republic of)
Filed on Nov. 04, 2003, as Appl. No. 10/699,879.
Claims priority of application No. 10-2002-0067974 (KR), filed on Nov. 04, 2002.
Prior Publication US 2004/0091137 A1, May 13, 2004
Int. Cl. G06K 9/00 (2006.01)
U.S. Cl. 382—118 16 Claims
OG exemplary drawing
 
1. A system for detecting a face, comprising:
a memory unit for storing eigenvectors and weights extracted from a plurality of training images;
a facial image recognition unit for extracting eigenvectors and weights of respective face components from an input facial image; and
a facial image decision unit for deriving an algorithm for deciding whether input facial images are occluded using the eigenvectors and weights of the training images stored in the memory unit, and for deciding whether the input facial image is occluded by substituting the eigenvectors and weights of the input image extracted in the facial image recognition unit into the derived algorithm,
wherein the deciding algorithm is expressed as the following equation:

OG Complex Work Unit Drawing
where yi, λi and b are factors obtained from the training images, and K(x,xi) is eigenvectors and weights extracted from the input facial image, and
wherein the facial image decision unit is configured to decide the input facial image to be normal if a result value obtained by substituting the eigenvectors and weights into the decision algorithm is 1 and to decide the input facial image to be occluded if the result value is −1.