CAJ | 학술논문

随着数字化时代的到来，图像数据变得越来越大，人们对于图像的质量要求也越来越高，因此好的图像压缩技术也变得越来越重要。一个高压缩比低失真度的压缩算法是图像压缩研究领域的重点。针对基于小波变换的图像压缩，其压缩比提高的同时，图像也出现较为明显的块状失真的问题，本文提出对经过小波分解后所得到的低频子带图像再进行DPMC四阶线性预测，从而改善由于块状失真问题，实验结果表明该方法在不改变压缩比的条件下对于失真问题有所改善。
수착수자화시대적도래，도상수거변득월래월대，인문대우도상적질량요구야월래월고，인차호적도상압축기술야변득월래월중요。일개고압축비저실진도적압축산법시도상압축연구영역적중점。침대기우소파변환적도상압축，기압축비제고적동시，도상야출현교위명현적괴상실진적문제，본문제출대경과소파분해후소득도적저빈자대도상재진행DPMC사계선성예측，종이개선유우괴상실진문제，실험결과표명해방법재불개변압축비적조건하대우실진문제유소개선。
With the advent of the digital age, the data of image becomes more and more big, people have higher requirement for the quality of image, so a good image compression technology is also becoming more and more important.An algorithm of high compression ratio and low distortion is the focus of the field of image compression.And for the image compression based on wave-let transform, the distortion of image would become more obvious with the improvement of compression ratio.The low-frequency of sub-band images which comes from wavelet decomposition is applied into the fourth order of DPMC linear prediction to improve the distortion problem.Experimental results show that the problem of the distortion is improved under the conditions of the same compression ratio.