TY - GEN
T1 - Projection-based spatially adaptive reconstruction of block transform compressed images
AU - Yang, Yongyi
AU - Galatsanos, Nikolas P.
AU - Katsaggelos, Aggelos K.
PY - 1994
Y1 - 1994
N2 - In conventional block-transform coding, the compressed images are decoded using only the transmitted transform data. In this paper, we formulate image decoding as an image recovery problem. According to this approach, the decoded image is reconstructed using not only the transmitted data, but in addition, the prior knowledge that images before compression do not display blocking artifacts. A spatially-adaptive image recovery algorithm is proposed based on the theory of projections onto convex sets. Numerical experiments demonstrate that the proposed algorithm yields images superior to those from both the JPEG deblocking recommendation and a projection-based image decoding approach.
AB - In conventional block-transform coding, the compressed images are decoded using only the transmitted transform data. In this paper, we formulate image decoding as an image recovery problem. According to this approach, the decoded image is reconstructed using not only the transmitted data, but in addition, the prior knowledge that images before compression do not display blocking artifacts. A spatially-adaptive image recovery algorithm is proposed based on the theory of projections onto convex sets. Numerical experiments demonstrate that the proposed algorithm yields images superior to those from both the JPEG deblocking recommendation and a projection-based image decoding approach.
UR - http://www.scopus.com/inward/record.url?scp=0028754185&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0028754185&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0028754185
SN - 081941638X
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 1477
EP - 1488
BT - Proceedings of SPIE - The International Society for Optical Engineering
PB - Society of Photo-Optical Instrumentation Engineers
T2 - Visual Communications and Image Processing '94
Y2 - 25 September 1994 through 29 September 1994
ER -