具有视觉特性的V9/7小波基在图像压缩中的应用

Application of Wavelet Base V9/7 with Human Visual Characteristics in Image Compression

摘要: 采用一种基于人眼视觉特性构造的紧支双正交小波基(V9/-7)实现小波变换,并给出该小波基提升格式的构造过程.结合JPEG2000的参考代码,采用基于该小波基的压缩编码实验表明:在相同的压缩比下采用该小波基进行压缩编码时,重建图像的峰值信噪比可以比采用JPEG2000标准中推荐的Daubechies9/-7小波基提高0.1～0.3-dB;比可逆变换的5/3小波基提高0.8-dB以上.

Abstract: The lifting scheme of wavelet transform is described in detail and applied to JPEG2000. Experiments show PSNR of the compressed image can be improved by0.1～0.3dB and over0.8dB respectively in comparison with Daubechies9／7and reversible wavelet base5／3under the same compression rate in the JPEG2000basic system.