计算机科学 ›› 2014, Vol. 41 ›› Issue (10): 134-138.doi: 10.11896/j.issn.1002-137X.2014.10.031
李幸,赵耀,林春雨,姚超
LI Xing,ZHAO Yao,LIN Chun-yu and YAO Chao
摘要: 随着3D视频技术的再度兴起,基于深度图像的3D视频数据表示格式得到了广泛的应用,因此针对深度图像的编码算法已成为当前研究的热点课题。利用小波变换后子带系数的分布统计特征,提出了一种不同于以往的基于小波变换的深度图像编码方案。该方案对小波量化系数进行统计分析,利用子带间小波系数的相关性,对小波变换后各个子带的小波系数进行预测。在同一层小波子带间,利用对角子带系数分别对水平和垂直方向的子带系数进行预测;在相邻层间,被预测的系数利用上一层相应的4个低频子带系数进行预测。最终,将原子带系数与预测系数的残差进行算术编码。实验结果表明,本方案在保证图像质量的同时能够有效地减少深度图像编码所需的比特数,最大可节省18.4%的码率。
[1] Smolic A,Mueller K,Merkle P,et al.Multi-View Video plus depth (MVD) format for advanced 3D video system[C]∥23rd Meeting ISO/IEC JTCI/SC29/WG11and ITU-T SG16 Q.6,JVT-w100.USA:San Jose,2007 [2] Maire M,Do M N.Joint Encoding of the Depth Image BasedRepresentations Using Shape-Adaptive Wavelets[C]∥IEEE Proceedings of the International Conference on Image Proces-sing.2008:1768-1771 [3] Wang M,Liu C,Zhang T,et al.Region of interest oriented fast mode decision for depth map coding in DIBR[C]∥IEEE 7th International Colloquium on Signal Processing and its Applications.2011:177-180 [4] Christopoulus C,Askelof J,larsson M.Efficient regions of Inte-rest coding Techniques in upcoming JPEG2000 still image coding standard[C]∥Processings of International Conference on Image Processing(ICIP).2000,2:41-44 [5] Oh K-J,Yea S,Vectro A,et al.Depth Reconstruction Filter and Down/Up Sampling for Depth Coding in 3-D Video[J].IEEE Signal Processing Letters,2009,16(9):747-750 [6] Daribo I,Saito H,Furukawa R,et al.Effects of Wavelet-Based Video Compression[C]∥3D-TV System with Depth-Image-Based Depth Rendering.2013:277-298 [7] Hyeokho Choi Justin K.Romberg and Richard G.Baramiuk:Multiscale edge grammarsfor complex wavelet transform[C]∥IEEE International Conference on Image Processing.2001:614-617 [8] Daubechies I.Ten Lectures on Wavelets [M].Philadelphia:Society for Indstrialand Applied Mathematics,1992 [9] Pourazad M T,Nasiopoulos P,Ward R K.Generating the Depth Map from the Motion Information of H.264-Encoded 2D Video Sequence[C]∥EURASIP Journal on Image and Video Proces-sing.2010 [10] 顾寅红,杨长生,宋广华.一种基于预测分类的小波图像编码[J].浙江大学学报:理学版,2002,29(6):663-668 [11] Tanimoto M,Fujii T,Suzuki K,et al.Reference Softwares forDepth Estimation and View Synthesis[J].ISO/IECJTC1/SC29/WG11MPEG,Archamps,France,2008,20081:M15377 [12] Shannon C E.A mathematical theory of communication[J].The Bell System TechnicalJournal,1948,27(3):379-423 |
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