Title:
画像処理方法,画像処理装置,映像符号化/復号方法,映像符号化/復号装置およびそれらのプログラム
Document Type and Number:
Japanese Patent JP5291133
Kind Code:
B2
Abstract:
The computational complexity of a denoising filter is reduced while suppressing a reduction in coding efficiency. In an image processing apparatus, an edge direction detection unit calculates an edge direction using a denoising target image. A search shape setting unit sets a search shape in which the number of search points along the direction perpendicular to the edge direction is smaller than the number of search points along the edge direction, using the calculated edge direction as an index used for limiting the search shape. When noise of a target pixel is removed with a weight in accordance with the degree of template similarity between a template for the target pixel and a template for each of search points within a search shape and the weighted sum of pixel values at the search points, a filter execution unit executes a process of performing template matching on only search points within the set search shape and removing the noise of the target pixel.
Inventors:
Nobuaki Matsumura
Masayuki Takamura
Jun Shimizu
Yasuzawa
Masayuki Takamura
Jun Shimizu
Yasuzawa
Application Number:
JP2011051443A
Publication Date:
September 18, 2013
Filing Date:
March 09, 2011
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
International Classes:
H04N19/00; G06T5/00; H04N1/409; H04N5/21; H04N19/107; H04N19/117; H04N19/119; H04N19/134; H04N19/136; H04N19/14; H04N19/167; H04N19/176; H04N19/182; H04N19/196; H04N19/503; H04N19/593; H04N19/61; H04N19/625; H04N19/80; H04N19/82; H04N19/86
Domestic Patent References:
| JP2010057157A | ||||
| JP2008205737A |
Other References:
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Ming Li,An improved non-local filter for image denoising,International Conference on Information Engineering and Computer Science, 2009. ICIECS 2009.,IEEE,2009年12月19日,p.1-4
Rui Lai and Xuan-xuan Dou,Improved non-local means filtering algorithm for image denoising,2010 3rd International Congress on Image and Signal Processing (CISP2010),IEEE,2010年10月16日,Vol.2,p.720-722
Wen-Qiang Feng et al.,A non-local bilateral filter for image denoising,2010 International Conference on Apperceiving Computing and Intelligence Analysis (ICACIA2010),IEEE,2010年12月17日,p.253-257
Takeshi Chujoh et al.,Description of video coding technology proposal by TOSHIBA,Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11 1st Meeting: Dresden, DE, Document: JCTVC-A117,ITU-T,2010年 4月
Jin Wang et al.,Fast non-local algorithm for image denoising,2006 IEEE International Conference on Image Processing,IEEE,2006年10月 8日,p.1429-1432
Ming Li,An improved non-local filter for image denoising,International Conference on Information Engineering and Computer Science, 2009. ICIECS 2009.,IEEE,2009年12月19日,p.1-4
Rui Lai and Xuan-xuan Dou,Improved non-local means filtering algorithm for image denoising,2010 3rd International Congress on Image and Signal Processing (CISP2010),IEEE,2010年10月16日,Vol.2,p.720-722
Wen-Qiang Feng et al.,A non-local bilateral filter for image denoising,2010 International Conference on Apperceiving Computing and Intelligence Analysis (ICACIA2010),IEEE,2010年12月17日,p.253-257
Takeshi Chujoh et al.,Description of video coding technology proposal by TOSHIBA,Joint Collaborative Team on Video Coding (JCT-VC) of ITU-T SG16 WP3 and ISO/IEC JTC1/SC29/WG11 1st Meeting: Dresden, DE, Document: JCTVC-A117,ITU-T,2010年 4月
Attorney, Agent or Firm:
Yoshiyoshi Ogasawara
Kenichi Hiraoka
Kenichi Hiraoka