CAJ | 학술논문

提出了一种基于Contourlet变换方向的多描述格型矢量量化图像编码算法。利用Contourlet变换所具有的多尺度、多方向的特点解决小波变换在多描述格型矢量量化过程中对输入的图像方向信息不充分的局限性。对Contourlet变换后的系数按照子带中方向特征划分区域设计相应的扫描方式对系数进行重新排序；然后采用基于几何相似的六边格矢量量化方案的多描述编码方案对图像进行编码。实验结果表明，文中策略对单路信道解码图像的峰值信噪比较传统方案具有一定程度的提高，同时重构图像较好地保留了原图像的纹理、边缘等几何信息。
제출료일충기우Contourlet변환방향적다묘술격형시량양화도상편마산법。이용Contourlet변환소구유적다척도、다방향적특점해결소파변환재다묘술격형시량양화과정중대수입적도상방향신식불충분적국한성。대Contourlet변환후적계수안조자대중방향특정화분구역설계상응적소묘방식대계수진행중신배서；연후채용기우궤하상사적륙변격시량양화방안적다묘술편마방안대도상진행편마。실험결과표명，문중책략대단로신도해마도상적봉치신조비교전통방안구유일정정도적제고，동시중구도상교호지보류료원도상적문리、변연등궤하신식。
M ultiple description lattice vector quantization image coding algorithm based on Contourlet transform direction is proposed .The characteristics of multi‐scale ,multi direction of Contourlet is used to solve the limitations of insufficiency of wavelet transform in the process of multiple descrip‐tion lattice vector quantization in directional information of input image .According to the direction characteristics of Contourlet coefficients in the sub‐bands dividing domain ,w hich design correspond‐ing scanning way to reorder coefficients ;As the multiple description coding of vector quantization scheme based on the geometric similarity six sides lattice for image coding .The experimental results show that the strategy of single channel decoding image peak signal‐to‐noise ratio has a certain degree of increase than traditional scheme ,at the same time ,reconstructed image retain the original image geometry information of texture and edge .