Department of Electronics and Electrical Engineering, Keio University, Yokohama 223-8522, Japan.
IEEE Trans Image Process. 2012 Jul;21(7):3220-8. doi: 10.1109/TIP.2012.2190611. Epub 2012 Mar 12.
Generalized block-lifting factorization of M-channel (M > 2) biorthogonal filter banks (BOFBs) for lossy-to-lossless image coding is presented in this paper. Since the proposed block-lifting structure is more general than the conventional lifting factorizations and does NOT require many restrictions such as paraunitary, number of channels, and McMillan degree in each building block unlike the conventional lifting factorizations, its coding gain is higher than that of the previous methods. Several proposed BOFBs are designed and applied to image coding. Comparing the results with conventional lossy-to-lossless image coding structures, including the 5/3- and 9/7-tap discrete wavelet transforms in JPEG 2000 and a 4 × 8 hierarchical lapped biorthogonal transform in JPEG XR, the proposed BOFBs achieve better result in both objective measure and perceptual visual quality for the images with a lot of high-frequency components.
本文提出了一种用于有损到无损图像编码的 M 通道（M>2）双正交滤波器组（BOFB）的广义块提升分解。由于所提出的块提升结构比传统的提升分解更通用，并且不像传统的提升分解那样需要许多限制，例如准单位、通道数量和每个构建块的 McMillan 度，因此其编码增益高于以前的方法。设计了几个所提出的 BOFB 并应用于图像编码。将结果与包括 JPEG 2000 中的 5/3-和 9/7 抽头离散小波变换以及 JPEG XR 中的 4×8 分层拉普拉斯双正交变换在内的传统有损到无损图像编码结构进行比较，对于具有大量高频分量的图像，所提出的 BOFB 在客观度量和感知视觉质量方面都取得了更好的结果。
