Journal of the Korean Institute of Telematics and Electronics B (전자공학회논문지B)

The Institute of Electronics and Information Engineers (대한전자공학회)
권호 표지

Visual-Weighted DCT Coding for Monochrome Still Images

흑백 정지 영상의 시기 하중 DCT 부호화

  • 황재정 (군산대학교 통신학과) ;
  • 양근호 (전북대학교 병원 의공과) ;
  • 이문호 (전북대학교 정보통신공학과)
  • Published : 1992.11.01
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Abstract

HVS based transform coding techniques for still images take the lowest spatial frequency and luminance contrast sensitivity as the most crucial factors in determining the image quality perceived by human eye. Only the frequency weighting has been main issue. The proposed Weighted Discrete Cosine Transform (WDCT) has the lowest frequency of about 4 [cyc/deg] in 8$\times$8 subblock with the contrast-weighted DC coefficient. The error criteria have been rederived to adapt the contrast weighting for performance evaluation. The proposed scheme has produced higher quality images compared to the unweighted and other schemes.

Keywords