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基于三维小波变换的视频图像编码算法
引用本文:李春华,王彦骏,张雨生. 基于三维小波变换的视频图像编码算法[J]. 华北电力大学学报(自然科学版), 2001, 28(1): 58-62
作者姓名:李春华  王彦骏  张雨生
作者单位:1. 华北电力大学计算机科学与工程系,
2. 河北电力调度通信局,
摘    要:针对现有图像压缩标准(DCT变换+运动补偿)在高压缩比时,方块效应严重影响主观质量这一问题,提出了一种基于三维小波变换的图像序列压缩算法。该算法在量化编码时,突破原有算法对系数逐帧处理的框架,将着眼点由“面”转向“体”;采用平面与纵向相结合的形式组织系数,并对运动程度不同的区域加以区分。以QCIF格式的标准序列图像Miss American作为测试图像进行实验,实验结果表明,该算法可将测试图像序列数据流控制在 32kb/s(10帧/s)以内,主观质量较好,无方块效应。

关 键 词:小波变换  图像压缩  矢量量化  低码率
文章编号:1007-2691(2001)01-0058-05
修稿时间:2000-03-16

An Image Sequence Compression Coding Scheme Based on 3-D Wavelet Transform
LI Chun-hua,WANG Yan-jun,ZHANG Yu-sheng. An Image Sequence Compression Coding Scheme Based on 3-D Wavelet Transform[J]. Journal of North China Electric Power University, 2001, 28(1): 58-62
Authors:LI Chun-hua  WANG Yan-jun  ZHANG Yu-sheng
Abstract:A new scheme based on 3-D wavelet transform for image sequence compression coding is proposed. The coefficients in the same sub-image are first organized as a unit, and so the correlation, including spatial-temporal correlation and father-children correlation from hierarchical blocks can be explored more efficiently. Ac- cording to the motion character, the coefficients in the same sub-image are treated separately. Computer simulation for the standard test image "Miss America" shows that the reconstructed image with the proposed coding scheme can hold acceptable subject quality with a rate below 32kb/s (10 frame/s).
Keywords:wavelet transform  image compress  vector quantization  low bit rate
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