计算机工程2013，Vol.39Issue(4)：272-275,279,5.DOI:10.3969/j.issn.1000-3428.2013.04.062
基于小波域降采样的低比特率图像压缩算法
Low Bit-rate Image Compression Algorithm Based on Down-sampling in Wavelet Domain
摘要
Abstract
To overcome the image blurring and ringing effect problem encountered in low bit-rate coding of images for wireless transmission,an efficient image compression algorithm via adaptive down-sampling and interpolation in wavelet domain is presented.At the encoding end,the image is transformed to wavelet domain,and the high frequency subbands are down-sampled adaptively according to their characteristics.The down-sampled image is coded by the wavelet tree-based Wavelet Difference Reduction(WDR) algorithm.At the decoding end,the decoded high frequency subbands are enlarged by using an edge direction based interpolation method,and the reconstructed image is post processed by a strong edge based adaptive filter to eliminate the ringing effect.Experimental results show that compared with the spatial down-sampling based compression algorithm,the proposed algorithm possesses higher decoding quality of images at low bit-rate,thus effectively alleviates the image blurring and ringing effect.关键词
降采样/图像压缩/图像插值/低比特率编码/小波变换/振铃效应Key words
down-sampling/ image compression/ image interpolation/ low bit-rate coding/ wavelet transform/ ringing effect分类
信息技术与安全科学引用本文复制引用
李庆忠,谷娜娜,刘晓丽..基于小波域降采样的低比特率图像压缩算法[J].计算机工程,2013,39(4):272-275,279,5.基金项目
国家"863"计划基金资助项目(2006AA09Z237) （2006AA09Z237）
