Artifact reduction in low bit rate DCT-based image compression

نویسندگان

  • Jiebo Luo
  • Chang Wen Chen
  • Kevin J. Parker
  • Thomas S. Huang
چکیده

This correspondence presents a scheme for artifact reduction of low bit rate discrete-cosine-transform-compressed (DCT-compressed) images. First, the DC coefficients are calibrated using gradient continuity constraints. Then, an improved Huber-Markov-random-field-based (HMRF-based) smoothing is applied. The constrained optimization is implemented by the iterative conditional mode (ICM). Final reconstructions of typical images with improvements in both visual quality and peak signal-to-noise ratio (PSNR) are also shown.

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عنوان ژورنال:
  • IEEE transactions on image processing : a publication of the IEEE Signal Processing Society

دوره 5 9  شماره 

صفحات  -

تاریخ انتشار 1996