期刊文献+

2维加窗全相位图像滤波模板的设计 被引量:5

Design of 2D All-phase Image Filtering Template with Window
下载PDF
导出
摘要 为克服常用滤波模板的缺陷,消除传统图像滤波中存在的振铃现象和方块效应,提出了任意正交变换下的2维加窗全相位滤波算法。在严格证明任意正交变换下的2维全相位模板的计算通式基础上,进一步推导出傅里叶变换下的加窗全相位模板的简化公式。通过对亚奈图像的恢复实验证明:相比于反傅氏变换法生成的模板,用全相位DFT(d iscrete Fourier transform)模板恢复出的图像PSNR(峰值信噪比)值要高出7dB以上,且消除了振铃现象。通过实验还证明,用全相位DCT(d iscrete cosine transform)模板滤波可完全消除传统分块滤波中的方块效应。 To overcome commonly-used filtering template' s drawback and remove the ringing artifact& block effect in conventional image filtering, this paper presents 2D all-phase window filtering under arbitrary orthogonal transform. Based on the general calculating formula of 2D all-phase template under arbitrary orthogonal transform, the concise formula of all- phase template with window under DFT is deduced. The restoration experiment on the sub-sampled image proves that: compared with the template constructed by IDFT, the PSNR of the image restored by all kinds of all-phase template is above 7dB higher and ringing artifact can be eliminated. Another experiment shows that block effect in conventional block filtering can be completely removed by employing 2D all-phase DCT template.
出处 《中国图象图形学报》 CSCD 北大核心 2006年第6期811-817,共7页 Journal of Image and Graphics
关键词 模板 2维加窗全相位滤波 振铃现象 方块效应 任意正交变换 template, 2D all-phase filtering with window, ringing artifact, block artifact, arbitrary orthogonal transform
  • 引文网络
  • 相关文献

参考文献8

  • 1Lee J D.Digital image enhancement and noise filter by use of local statistics[J].IEEE Transacttions on Pattern Analysis and Machine Intelligence,1997,19(9):863 ~ 872.
  • 2Rosenfeld A,Kak.Digital A C Picture Processing [M].Newyork:Acdemic,1976:130 ~ 170.
  • 3Hu J,Sinaceur N,Li F.Removal of blocking and ringing artifacts in transform coded images [J].Proceedings of IEEE International Conference on Acoustics,Speech and Signal Processing,1997,4(4):2565 ~2568.
  • 4王兆华,候正信,苏飞.全相位数字滤波[J].信号处理,2003,19(z1):1-4. 被引量:30
  • 5Lee J B,Lee B G.Transform domain filtering based on pipelining structure [J].IEEE Transactions on Signal Processing,1992,40(8):2061 ~ 2064.
  • 6Satoshi Kondo.A method for removing blocking effects in Mpeg-2 video by appling a block classification technique using stream information [ J].IEEE Transactions on Consumer Electronics,2000,46 (3):872 ~ 878.
  • 7苏飞,王兆华.二维Fourier带窗内插模板的设计[J].中国图象图形学报(A辑),2004,9(4):439-444. 被引量:4
  • 8侯正信.三种二维重叠数字滤波器的构造[J].天津大学学报,1985,(1):29-41.

二级参考文献8

  • 1王兆华.邻域交换内插法[J].信号处理,1993,9(1):2-8. 被引量:9
  • 2Gopinath R A, Burrus C S. Wavelet based lowpass/bandpass interpolation[A]. In: Proceedings of 1992 IEEE International Conference on Acoustics, Speech, and Signal Processing [C].San Francisco, California, USA, 1992,4: 385-388.
  • 3Nguyen N, Milanfar P. An efficient wavelet-based algorithm for image superresolution [ A ]. In: Proceedings of Seventh International Conference on Image Processing[C], Vancouver,British Columbia,Canada, 2000,4: 351-354.
  • 4Mallet S. A theory for multiresolution signal decomposition:The wavelet representation [J]. IEEE Transactions on PAMI, 1989,11(7) :674-693.
  • 5WangZhaohua.Amplifying pattern of video wall[J].世界广播电视,1991,5(11):59-60.
  • 6王兆华.用二维重叠数字滤波器在生亚Nyquist取样PAL信号[J].天津大学学报,1983,1:47-64.
  • 7王兆华.计算机图象处理方法[M].北京:宇航出版社,1993.139-149.
  • 8王兆华,韩萍,曹继华.FOURIER重叠数字滤波器[J].信号处理,2001,17(2):189-191. 被引量:18

共引文献34

同被引文献34

引证文献5

二级引证文献6

;
使用帮助 返回顶部