多小波圖像變換的自適應(yīng)預(yù)濾波
ADAPTIVE PREFILTER FOR MULTIWAVELET IMAGE TRANSFORM
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摘要: 該文基于多小波分解高通能量的極小化,提出了一種計(jì)算量小、實(shí)現(xiàn)簡(jiǎn)單的自適應(yīng)預(yù)濾波方法,并將其推廣到二維圖像,對(duì)行與列分別處理,實(shí)現(xiàn)了圖像的自適應(yīng)預(yù)濾波,使恢復(fù)圖像質(zhì)量的整體效果變好。實(shí)驗(yàn)結(jié)果表明,利用本文提出的自適應(yīng)預(yù)濾波方法進(jìn)行圖像壓縮明顯優(yōu)于現(xiàn)有的其它預(yù)濾波器。
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關(guān)鍵詞:
- 多小波; 自適應(yīng)預(yù)濾波; 圖像壓縮
Abstract: A simple and efficient method to design adaptive prefilters based on minimizing the high pass energy of the signal multiwavelet decomposition is presented in this paper. This method can be generalized to 2-dimensional images by processing rows and columns respectively. In this way adaptive prefiltering can be performed for images so that the reconstructed image quality is greatly improved. The experimental result shows that the adaptive prefilter given in this paper is superior to the other prefilters available. -
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