Detection of Facial Feature Regionsby Manipulation of DCT's Coefficients

DCT 계수를 이용한 얼굴 특징 영역의 검출

  • Lee, Boo-Hyung (Dep. Computer Engineering, Kongju National University) ;
  • Ryu, Jang-Ryeol (Dep. Electrical & Electronic Engineering, Kongju National University)
  • Published : 2007.04.30

Abstract

This paper proposes a new approach fur the detection of facial feature regions using the characteristic of DCT(discrete cosine transformation) thatconcentrates the energy of an image into lower frequency coefficients. Since the facial features are pertained to relatively high frequency in a face image, the inverse DCT after removing the DCT's coefficients corresponding to the lower frequencies generates the image where the facial feature regions are emphasized. Thus the facial regions can be easily segmented from the inversed image using any differential operator. In the segmented region, facial features can be found using face template. The proposed algorithm has been tested with the image MIT's CBCL DB and the Yale facedatabase B. The experimental results have shown superior performance under the variations of image size and lighting condition.

Keywords

Facial Feature;Face Region;DCT;IDCT;IDCTed image