A modified fractal transformation to improve the quality of fractal coded images

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 into range blocks. During this process it is usual to filter the domain...

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Bibliographic Details
Published inProceedings 1998 International Conference on Image Processing. ICIP98 (Cat. No.98CB36269) Vol. 1; pp. 756 - 759 vol.1
Main Authors De Oliveira, J.F.L., Mendonca, G.V., Dias, R.J.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1998
Subjects
Compression algorithms
Extraterrestrial measurements
Filtering
Filters
Fractals
Image coding
Image quality
Noise measurement
PSNR
Shape
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Summary: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 into range 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 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.
ISBN:0818688211
9780818688218
DOI:10.1109/ICIP.1998.723605