Real-time facial expression detection based on frequency domain transform

Kazuyuki Ebihara*, Jun Ohya, Fumio Kishino

*この研究の対応する著者

研究成果

7 被引用数 (Scopus)

抄録

A new method for the real-time detection of facial expressions from time-sequential images is proposed. The proposed method does not need the tape marks that are pasted to the face for detecting expressions in real-time in the current implementation for virtual space teleconferencing. In the proposed method, four windows are applied to four areas in the face image: a left and right eye, mouth, and forehead. Each window is divided into blocks that consist of 8 by 8 pixels. Discrete cosine transform (DCT) is applied to each block, and the feature vector of each window is obtained by taking the summations of the DCT energies in the horizontal, vertical, and diagonal directions. To convert the DCT features to virtual tape mark movements, we represent the displacement of a virtual tape mark by a polynomial of the DCT features for the three directions. We apply a genetic algorithm to train facial expression image sequences to find the optimal set of coefficients that minimizes the difference between the real and converted displacements of the virtual tape marks. Experimental results show the effectiveness of the proposed method.

本文言語English
ホスト出版物のタイトルProceedings of SPIE - The International Society for Optical Engineering
ページ916-926
ページ数11
2/-
出版ステータスPublished - 1996 12 1
外部発表はい
イベントVisual Communications and Image Processing'96. Part 2 (of 3) - Orlando, FL, USA
継続期間: 1996 3 171996 3 20

出版物シリーズ

名前Proceedings of SPIE - The International Society for Optical Engineering
番号2/-
2727
ISSN(印刷版)0277-786X

Other

OtherVisual Communications and Image Processing'96. Part 2 (of 3)
CityOrlando, FL, USA
Period96/3/1796/3/20

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • コンピュータ サイエンスの応用
  • 応用数学
  • 電子工学および電気工学

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