대한전기학회논문지:시스템및제어부문D (The Transactions of the Korean Institute of Electrical Engineers D)

대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지

DCT 기반의 시각 적응적 양자화 방법에 관한 연구

A DCT-Based Bisually Adaptive Quantization

  • 발행 : 2001.07.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

A visually adaptive quantization method of DCT-based images based on Human Visual System(HVS) is proposed. This approach uses the spatial masking in HVS characteristics to obtain higher compression ratio with relatively small degradation in the image quality. HVS is nonsensitive to an edge area, so a high complexity area is quantized coarsely in contrast to fine quantization of the low complexity area. The complexity of an area is estimated by the variance of DCT coefficients of the image. Experimental results demonstrate the performance of the proposed method and the resulting images show little difference from the original image in the subjective perception.

키워드

참고문헌

  1. ISO/IEC 13818-2, 'Generic coding of Moving Pictures and associated Audio Information-video', Nov. 1994
  2. ITU-T Recommendation H.263. 'Video Coding for Low Bitrate Communication', Mar. 1996
  3. B. Ramamurthi and A. Gersho, 'Nonlinear space-variant postprocessing of block coded images', IEEE Trans. Acoiustics, Speech, Signal Processing, Vol. ASSP-34, no. 5, pp. 1258-1268, Oct. 1986
  4. D. R. Fuhrmann, J. A. Baaro and J. R. Cox, 'Experimental evaluation of psychophysical distortion metrics for JPEG-Encoded images', Proc. of SPIE, pp. 179-190, San Jose, CA, USA, 1993 https://doi.org/10.1117/12.152692
  5. S. A. Karunasekera and N. G. Kingsbury, 'A Distortion measure for image artifacts based on Human Visual sensitivity', ICASSP-94, Vol. V, pp. 405-408, Mineapolis, Apr. 1993
  6. 허봉식, 김민환, '블록 DCT 기반의 시각 적응적 이미지 압축에 관한 연구', 정보과학회 논문지(A), 제 22권 제 10호, 1995
  7. D. J. LE Gall, 'MPEG : A video compression standard for multimedia applications', Communications of the ACM, Vol.34, pp.47-58, Apr. 1991
  8. D. J. LE Gall, 'The MPEG video compression algorithm', Signal Proceeding : Image Communication, Vol. 4, pp. 129-140, Apr. 1992 https://doi.org/10.1016/0923-5965(92)90019-C
  9. A. Nagata et al., 'Moving picture coding system for digital storage media using hybrid coding', Signal Proceeding : Image Communication, Vol. 2, pp.109-116, Aug. 1990 https://doi.org/10.1016/0923-5965(90)90014-9
  10. Rao, J. J. Hwang, 'Techniques & Standards for Image, Video and Audio Coding', Prentice Hall, 1996
  11. 정화자, 'DCT를 이용한 윤곽선 추출', 정보과학회 논문지(C), 제 3권 제 1호, 1997
  12. Borko Furht, Joshua Greenberg, Raymond Westwater, 'Motion Estimation Algorithms For Video Compression', Kluwer Academic Publishers, 1997