计算机应用 ›› 2016, Vol. 36 ›› Issue (7): 1944-1948.DOI: 10.11772/j.issn.1001-9081.2016.07.1944

• 虚拟现实与数字媒体 • 上一篇    下一篇

基于结构张量的视频超分辨率算法

严宏海, 卜方玲, 徐新   

  1. 武汉大学 电子信息学院, 武汉 430079
  • 收稿日期:2015-12-24 修回日期:2016-03-14 出版日期:2016-07-10 发布日期:2016-07-14
  • 通讯作者: 卜方玲
  • 作者简介:严宏海(1991-),男,河南驻马店人,硕士研究生,主要研究方向:视频建模、超分辨率;卜方玲(1967-),女,湖北武汉人,副教授,博士,主要研究方向:系统与网络、信息处理;徐新(1967-),男,湖北武汉人,教授,博士生导师,博士,主要研究方向:遥感影像处理、语音信号处理、通信信号处理。
  • 基金资助:
    国家863计划项目(2013AA122301)。

Video super resolution method based on structure tensor

YAN Honghai, PU Fangling, XU Xin   

  1. School of Electronic Information, Wuhan University, Wuhan Hubei 430079, China
  • Received:2015-12-24 Revised:2016-03-14 Online:2016-07-10 Published:2016-07-14
  • Supported by:
    This work is partially supported by the National High Technology Research and Development Program (863 Program) of China (2013AA122301).

摘要: 针对传统正则化超分辨率(SR)重建模型中,正则化参数选择过大会使重建结果模糊,导致边缘和纹理等细节丢失,选择过小模型去噪能力又不足的问题,提出一种基于结构张量的双正则化参数的视频超分辨率重建算法。首先,利用局部结构张量对图像进行平滑区域和边缘的检测;然后,利用差异曲率对全变分(TV)进行先验信息加权;最后,对平滑区域和边缘采用不同的正则化参数进行超分辨率重建。实验数据显示提出的算法将峰值信噪比(PSNR)提高了0.033~0.11 dB,具有较好的重建效果。实验结果表明:该算法能够有效地提升低分辨率(LR)视频帧重建效果,可应用于低分辨率视频增强、车牌识别和视频监控中感兴趣目标增强等方面。

关键词: 超分辨率, 帧序列, 结构张量, 双正则化参数, 全变分加权

Abstract: The parameter of traditional regularized Super Resolution (SR) reconstruction model is difficult to choose:the higher parameter value results in blurred reconstruction and the fading of edge and detail, while the lower parameter value weakens the denosing ability. A double regularization parameters super resolution reconstruction method based on structure tensor was proposed. Firstly, smooth region and edge was detected by using local structure tensor. Secondly, the Total Variation (TV) was weighted with the priori information of difference curvature. Finally, two different parameters toward smooth region and edge were used to reconstruct super resolution image. The experimental data show that the proposed algorithm can improve the Peak Signal-to-Noise Ratio (PSNR) of 0.033-0.11 dB, and get better reconstruction results. The proposed algorithm can effectively improve the reconstruction effect of Low Resolution (LR) video frames, and can be applied to LR video enhancement, license plate recognition and the interest target enhancement in video surveillance, etc.

Key words: Super Resolution (SR), frame sequence, structure tensor, double regularization parameter, Total Variation (TV) weighting

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