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Please use this identifier to cite or link to this item: http://hdl.handle.net/11133/1142

Title: サブバンド分割と組み合わせたフラクタル画像符号化
Other Titles: サブバンド ブンカツ ト クミアワセタ フラクタル ガゾウ フゴウカ
Fractal Image Coding combined with Sub-band Decomposition
Authors: 永井, 進也
中村, 栄治
沢田, 克敏
NAGAI, Shinya
SAWADA, Katsutoshi
Issue Date: 31-Mar-2001
Publisher: 愛知工業大学
Abstract: In order to improve the performance of fractal image coding, this paper proposes a new coding scheme which is combined with resolution decomposition by sub-band. In the proposed scheme, an input image is first decomposed to low and high resolution sub-band images. The fractal block conding with adaptive range block size is performed only for the lowest resolution sub-band image. On the other hand direct quantization and entropy coding are carried out for the other high resolution sub-band image. The residual difference between reconstructed and original lowest resolution sub-band image is also quantized and entropy coded in order to enhance the coding performance. Computer simulation experiment were carried out employing 4 sub-bands and 7 sub-bands decompositions. The results show that the proposed coding scheme gives higher SNR (Signal-to-Noise Ratio) values and better reconstructed image qualities compared to the conventional fractal block coding scheme
URI: http://hdl.handle.net/11133/1142
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