M. Harada, T. Fujii, T. Kimoto, M. Tanimoto. Fractal Image Coding Based on Replaced Domain Pools. In The International Society For Optical Engineering, Volume 3309, Pages 1042-1049, 1998.
Fractal image coding based on Iterated Function System (IFS) has been attracting much interest because of the possibilities of drastic data compression. It performs compression by using the self-similarity included in (range block) is mapped from that larger block (domain block) which is considered as the most suitable block to approximate the range block. However, even if the exakt self-similarity of an image is found at the encoder, it hardly holds at the decoder because a domain pool of the encoder is different from that of the decoder. In this paper, we propose a fractal image coding scheme by using domain pools replaced with decoded or transformed values to reduce the difference between the domain pools of the encoder and that of the decoder. The proposed scheme performs two-stage encoding. The domain pool is replaced with decoded non-contractive blocks first and then with transformed values for contractive blocks. It is expected that the proposed scheme reduces errors of contractive blocks in the reconstructed image while those of non-contractive blocks are kept unchanged. The experimental results show the effectiveness of the proposed scheme.
@InProceedings{HFKT98,
Author = {Harada, M. and Fujii, T. and Kimoto, T. and Tanimoto, M.},
Title = {Fractal Image Coding Based on Replaced Domain Pools},
BookTitle = {The International Society For Optical Engineering},
Volume = {3309},
Number = {2},
Pages = {1042--1049},
Series = {Proc. SPIE},
Year = {1998}
}