Real-time facial expression detection based on frequency domain transform

Kazuyuki Ebihara, Jun Ohya, Fumio Kishino

Research output: Chapter in Book/Report/Conference proceedingConference contribution

7 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
Pages916-926
Number of pages11
Edition2/-
Publication statusPublished - 1996 Dec 1
Externally publishedYes
EventVisual Communications and Image Processing'96. Part 2 (of 3) - Orlando, FL, USA
Duration: 1996 Mar 171996 Mar 20

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Number2/-
Volume2727
ISSN (Print)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

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Ebihara, K., Ohya, J., & Kishino, F. (1996). Real-time facial expression detection based on frequency domain transform. In Proceedings of SPIE - The International Society for Optical Engineering (2/- ed., pp. 916-926). (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 2727 , No. 2/-).