Iterative projection algorithms for removing the blocking artifacts of block-DCT compressed images

  • Authors:

  • Yongyi Yang;N. P. Galatsanos;A. K. Katsaggelos

  • Affiliations:

  • Department of Electrical and Computer Engineering, Illinois Institute of Technology, Chicago, Illinois;Department of Electrical and Computer Engineering, Illinois Institute of Technology, Chicago, Illinois;Department of Electrical Engineering and Computer Science, Northwestern University, Evanston, IL

  • Venue:
  • ICASSP'93 Proceedings of the 1993 IEEE international conference on Acoustics, speech, and signal processing: image and multidimensional signal processing - Volume V
  • Year:
  • 1993

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Abstract

In this paper, iterative projection algorithms are presented to reconstruct visually pleasing images from Block Discrete Cosine Transform (BDCT) compressed image data. Two algorithms are proposed. The first is based on the theory of Projections Onto Convex Sets(POCS). The second is motivated by the theory of POCS. Experimental results are presented which demonstrate that the proposed algorithms yield superior images to those obtained by direct reconstruction from the compressed data only.