Title:
静止画像、ビデオ、および映画のコンテンツベースのガウスノイズ低減
Document Type and Number:
Japanese Patent JP4677488
Kind Code:
B2
Abstract:
A noise filtering technique for reducing noise in an image comprised of an array of pixels achieves strong filtering over smooth areas and less filtering over rich edge areas. The technique commences by defining MxN neighborhood of pixels for a selected pixel, where M and N are integers. The technique also includes the step of establishing a local filter strength for the selected pixel in accordance with its local variance, and filtering the selected pixel to reduce noise in accordance with its established local filter strength.
Inventors:
Phosphorus
Application Number:
JP2008515669A
Publication Date:
April 27, 2011
Filing Date:
June 07, 2005
Export Citation:
Assignee:
Thomson Licensing
International Classes:
G06T5/00; H04N1/409
Other References:
G. Deng and L. W. Cahill,An Adaptive Gaussian Filter For Noise Reduction and Edge Detection,Nuclear Science Symposium and Medical Imaging Conference, 1993., 1993 IEEE Conference Record. ,1993年10月31日,vol.3 ,1615 - 1619
K. Rank, M. Lendl and R. Unbehauen,Estimation of image noise variance,Vision, Image and Signal Processing, IEE Proceedings,1999年 8月,Vol. 146, Issue:2 ,80 - 84
K. Rank, M. Lendl and R. Unbehauen,Estimation of image noise variance,Vision, Image and Signal Processing, IEE Proceedings,1999年 8月,Vol. 146, Issue:2 ,80 - 84
Attorney, Agent or Firm:
Tadahiko Ito