计算机应用 ›› 2012, Vol. 32 ›› Issue (07): 1856-1859.DOI: 10.3724/SP.J.1087.2012.01856

• 图形图像技术 • 上一篇    下一篇

基于视差矢量特点的视差估计快速算法

宋晓炜,杨蕾,刘忠,廖亮   

  1. 中原工学院 电子信息学院,郑州450007
  • 收稿日期:2011-12-12 修回日期:2012-02-07 发布日期:2012-07-05 出版日期:2012-07-01
  • 通讯作者: 宋晓炜
  • 作者简介:宋晓炜(1978-),男,山西大同人,副教授,博士,CCF会员,主要研究方向:信号与信息处理、视频编码、立体图像/视频处理;杨蕾(1979-),女(回族),河南洛阳人,副教授,博士,CCF会员,主要研究方向:立体图像/视频处理、网络视频通信;刘忠(1986-),男,河北保定人,硕士研究生,CCF会员,主要研究方向:立体图像/视频处理;廖亮(1975-),男,河南郑州人,讲师,博士,CCF会员,主要研究方向:图像处理、模式识别。
  • 基金资助:

    国家科技重大专项(2009ZX03004-006);国家自然科学基金青年基金资助项目(60902063);中国博士后科学基金资助项目(20090460696);河南省高等学校青年骨干教师资助项目(2010GGJS-098);河南省科技创新人才计划科技创新杰出青年项目(124100510015)

Fast disparity estimation algorithm based on features of disparity vector

SONG Xiao-wei,YANG Lei,LIU Zhong,LIAO Liang   

  1. School of Electronic and Information Engineering, Zhongyuan University of Technology, Zhengzhou Henan 450007, China
  • Received:2011-12-12 Revised:2012-02-07 Online:2012-07-05 Published:2012-07-01
  • Contact: SONG Xiao-wei

摘要: 视差估计是立体视频压缩中的一项关键技术。针对极线校正算法存在的不足,提出了一种基于视差矢量特点的快速视差估计算法。算法分析了平行摄像机与会聚摄像机系统中视差矢量特点,并根据它们的特点通过三步搜索来确定最佳匹配块。分别在分辨率640×480与1280×720两种素材中进行了实验,实验结果表明,与JMVC中的TZ搜索算法相比,所提算法能够在保证图像质量与压缩效率基本不变的前提下,有效缩短编码时间,提高编码效率。由于所提算法不再进行极线校正,所以不会产生极线校正算法存在的问题。

关键词: 视差矢量, 视差估计, 三步搜索, 最佳匹配块, 编码效率

Abstract: Disparity estimation is a key technology for stereo video compression. Considering the disadvantage of the epipolar correction algorithm, a fast disparity estimation algorithm based on the features of disparity vector was proposed. The algorithm analyzed the features of disparity vector in parallel camera and convergent camera systems respectively, and explained how to find the best matching block by a three-step search according to their features. The algorithm was tested in both 640×480 and 1280×720 resolution sequences. The experimental results show that compared to the original TZSearch algorithm in JMVC, the proposed algorithm can effectively shorten the encoding time and improve coding efficiency without decreasing the image quality and compression efficiency. Because there is not epipolar correction in the proposed algorithm, the disadvantage caused by epipolar correction will not appear.

Key words: disparity vector, disparity estimation, three-step search, best matching block, coding efficiency

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