全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

基于双正则化的图像超分辨率盲重建

DOI: 10.11834/jig.20071204

Keywords: 图像超分辨率重建,盲解卷,分辨率增强,点扩散函数估计

Full-Text   Cite this paper   Add to My Lib

Abstract:

图像超分辨率重建是利用数字信号处理技术由一系列低分辨率观测图像得到高分辨率图像。大多数重建算法假设成像系统的模糊特性也即点扩散函数(PSF)已知,然而实际的应用环境下PSF事先不知道或部分知道。为此,将未知PSF模型化,提出基于双正则化的图像超分辨率盲重建算法,并且正则化作用的强度随重建图像局部光滑程度的变化而自适应地改变,以便能保护图像细节同时抑制平滑区域的噪声。求解过程中采用交替最小化方法估计PSF参数和高分辨率图像,并随着迭代次数的增加逐步提高每次寻优的精度以节省计算开销。实验结果表明,该算法能够比较准确地估计出PSF参数并取得较好的图像重建效果。

References

[1]  Tsai R Y,Huang T S.Multiple frame image restoration and registration[A].In:Advances in Computer Vision and Image Processing[M],Greenwich,CT,England:JAI Press,1984:317~339.
[2]  He H,Kondi L P.A regularization framework for joint blur estimation and super-resolution of video sequences[A].In:IEEE International Conference on Image Processing[C],Genoa,Italy,2005,3 (9):329 ~ 332.
[3]  Hardie R C,Barnard K J,Armstrong E E.Joint MAP registration and high-resolution image estimation using a sequence of undersampled images[J].IEEE Transactions on Image Processing,1997,6(12):1621 ~ 1633.
[4]  Chardon S,Vozel B,Chehdi K.A comparative study between parameteric blur estimation methods[A].In:Proceedings of International Conference Acoustic,Speech,Signal Processing[C],Phoenix,USA,1999:3233 ~3236.
[5]  Park S C,Park M K,Kang M G.Super-resolution image reconstruction:a technique overview[J].IEEE Signal Processing Magazine,2003,20(3):21 ~26.
[6]  Nguyen N,Milanfar P,Golub G H.Efficient generalized crossvalidation with applications to parametric image restoration and resolution enhancement[J].IEEE Transactions on Image Processing,2001,10(9):1299 ~ 1308.
[7]  Kundur D,Hatzinakos D.Blind image deconvolution[J].IEEE Signal Processing Magazine,1996,13 (5):43 ~ 64.
[8]  Zhang Hang,Luo Da-yong.Status and development of study on blind image restoration algorithm[J].Journal of Image and Graphics,2004,9(10):1145~1152.[张航,罗大庸.图像盲复原算法研究现状及其展望[J].中国图象图形学报,2004,9(10):1145~1152.]
[9]  Katsaggelos A K,Biemond J,Schafer R W,et al.A regularized iterative image restoration algorithm[J].IEEE Transactions on Signal Processing,1991,39(4):914 ~929.
[10]  Chan T F,Wong C K.Convergence of the alternating minimization algorithm for blind deconvolution[J].Linear Algebra Application,2000,316(9):259 ~285.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133