基于Keren配准和插值的快速超分辨率图像重建  

Fast Super-Resolution Image Reconstruction Based on Keren Registration and Interpolation

作　　者：李展[1] 韩国强[1] 陈湘骥[2] 廖秀秀[1] 

机构地区：[1]华南理工大学计算机科学与工程学院,广东广州510006 [2]华南农业大学信息学院,广东广州510642

出　　处：《华南理工大学学报（自然科学版）》2011年第5期84-90,共7页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(10778617;10973007;61070090);广东省科技计划重大专项(2010A080402005);广东省科技计划项目(2008B080701052;2010B080701062);广东省自然科学基金资助项目(10151063201000002)

摘　　要：为提高图像超分辨率重建技术实时应用的可能性,增强其对配准误差的容忍度,提出了一种基于Keren配准和插值的快速鲁棒超分辨率图像重建算法.该算法将配准后的低分辨率图像根据变换参数映射到高分辨率网格上,再利用模板卷积迭代地填充缺失像素值,从而重建一幅高分辨率图像.将文中算法与非均匀插值法、凸集映射法、鲁棒的迭代后向映射法和结构适应的归一化卷积法4种超分辨率图像重建算法进行了比较.实验结果表明,文中算法对一定精度范围内的配准误差不敏感,在速度和重建效果上具有一定的优势,是一种有效、鲁棒和快速的多帧超分辨率图像重建算法.In order to make it possible to apply the super-resolution reconstruction（SRR） technology of images in real time and to improve the tolerance of registration errors,a fast and robust SRR algorithm based on Keren registration and interpolation is proposed.In this algorithm,registered low-resolution（LR） images are mapped onto a high-resolution（HR） grid according to their transform parameters,and the space pixels are filled iteratively via the template convolution to reconstruct a HR image.The proposed algorithm is finally compared with four existing SRR algorithms including the nonuniform interpolation,the projection onto convex sets,the robust iterative back projection and the structure-adaptive normalized convolution.The results show that the proposed algorithm is an effective,robust and fast SRR method for multi-frame images because it is insensitive to registration errors in a certain accuracy range with high reconstruction speed and quality.

关 键 词：图像重建 超分辨率 Keren配准 插值 卷积 

分 类 号：TP37[自动化与计算机技术—计算机系统结构]