J. F. L. de Oliveira, G. V. Mendonca, R. J. Dias. A modified fractal transformation to improve the quality of fractal coded images. In Proc. ICIP-98 IEEE International Conference on Image Processing, Chicago, 1998.
The Discrete Fractal Transformation has recently emerged as a powerful technique for coding images. The scheme works by dividing an image into blocks and making use of a contraction mapping by which the domain blocks are mapped intorange blocks. During this process it is usual to filter the domain blocks. In this work, we show how a change in the filtering procedure can improve the image quality of fractal coding methods based on the mentioned transformation. After a presentation of the discrete fractal transformation, we explain the change and we apply it to the quadtree-based fractal scheme obtaining improvements in PSNR that can reach 1 dB when compared with the results obtained by traditional filtering.
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@InProceedings{OlMeDi98,
Author = {Oliveira, J. F. L. de and Mendonca, G. V. and Dias, R. J.},
Title = {A modified fractal transformation to improve the quality of fractal coded images},
BookTitle = {Proc. ICIP-98 IEEE International Conference on Image Processing},
Address = {Chicago},
Month = {},
Year = {1998}
}