| 基于帧间单映变换的视频序列超分辨率重建 |
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| 引用本文： | 韩玉兵,束锋,吴乐南.基于帧间单映变换的视频序列超分辨率重建[J].应用科学学报,2007,25(3):257-262. |
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| 作者姓名： | 韩玉兵 束锋 吴乐南 |
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| 作者单位： | 1.南京理工大学 电子工程与光电技术学院，江苏 南京 210094;2.东南大学 无线电工程系，江苏 南京 210096 |
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| 基金项目： | 江苏省图像处理与图像通信重点实验室开放研究课题 |
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| 摘 要： | 针对帧间单映变换的视频序列提出了一种超分辨率重建算法。首先在最小二乘的基础上给出超分辨率重建的数学模型；其次采用基于模型的等级估计法估计相邻帧的单映变换矩阵；然后采用基于RANSAC的特征点匹配方法对非相邻帧进行带指导的改进估计，使其能够达到要求的亚像素级精度；最后运用共扼梯度算法进行迭代重建，并详细讨论了主要的矩阵向量乘法计算。实验结果表明该算法的重建相当有效。
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| 关 键 词： | 视频处理 超分辨率重建 单映变换 随机抽样一致性算法 共轭梯度算法 |
| 文章编号： | 0255-8297（2007）03-0257-06 |
| 收稿时间： | 2006-09-11 |
| 修稿时间： | 2006-09-112007-01-15 |
Super Resolution Reconstruction of Video Sequence Based on Inter-frame Homography Transform |
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| HAN Yu-bing,SHU Feng,WU Le-nan.Super Resolution Reconstruction of Video Sequence Based on Inter-frame Homography Transform[J].Journal of Applied Sciences,2007,25(3):257-262. |
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| Authors: | HAN Yu-bing SHU Feng WU Le-nan |
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| Institution: | 1. School of Electronic Engineering & Optoelectronic Techniques, Nanjing University of Science & Technology, Nanjing, 210094, China;2. Department of Radio Engineering, Southeast University, Nanjing, 210096, China |
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| Abstract: | A super resolution(SR) reconstruction algorithm of video sequence based on inter-frame homography transform is presented in this paper.The mathematical model of SR is introduced using the least square principle.Hierarchical model-based motion estimation is adopted to compute the adjacent homography matrix.For non-adjacent frames,the homography matrix is estimated with guided feature registration based on RANSAC algorithm,which gives sub-pixel accuracy.Finally,a conjugate gradient algorithm is used to reconstruct the SR frames,and computation of matrix-vector multiplication is studied in detail.Experimental results demonstrate effectiveness of the proposed method. |
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| Keywords: | video processing super resolution reconstruction homography transform RANSAC algorithm CG algorithm |
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