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Paper Abstract and Keywords
Presentation 2020-03-13 11:20
Accelerating Normalized Cut Based on Segment Decomposition
Tomoki Kizawa, Yuki Endo, Yoshihiro Kanamori, Jun Mitani (Tsukuba Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Many image segmentation methods formulate the problem of foreground extraction as an eigenproblem of a Laplacian matrix defined by the input image, as done in the classical approach, Normalized Cut. The problem here is that the computational cost of such eigenproblem increases rapidly as the resolution of the input image becomes large. In this work, we accelerate Laplacian-based image segmentation by separately solving small eigenproblems defined by one-by-N image strips that are extracted in horizontal, vertical, and diagonal directions in the input image. Their eigenproblems can be solved fast because the resultant Laplacian matrices are tridiagonal. We further subdivide the image strips according to the consequent eigenvectors into segments and assign fore-/background labels to the segments in order to obtain a binary mask. We demonstrate that the proposed method performs fast, even for high-resolution images.
Keyword (in Japanese) (See Japanese page) 
(in English) Foreground Extraction / Normalized Cut / Laplacian Matrix / / / / /  
Reference Info. ITE Tech. Rep., vol. 44, pp. 141-144, March 2020.
Paper #  
Date of Issue 2020-03-06 (AIT) 
ISSN Print edition: ISSN 1342-6893    Online edition: ISSN 2424-1970
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Conference Information
Conference Date 2020-03-13 - 2020-03-13 
Place (in Japanese) (See Japanese page) 
Place (in English) Tokyo University of Technology 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Expressive Japan 2020 
Paper Information
Registration To AS 
Conference Code 2020-03-AIT-IIEEJ-AS-ARTS 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Accelerating Normalized Cut Based on Segment Decomposition 
Sub Title (in English)  
Keyword(1) Foreground Extraction  
Keyword(2) Normalized Cut  
Keyword(3) Laplacian Matrix  
1st Author's Name Tomoki Kizawa  
1st Author's Affiliation University of Tsukuba (Tsukuba Univ.)
2nd Author's Name Yuki Endo  
2nd Author's Affiliation University of Tsukuba (Tsukuba Univ.)
3rd Author's Name Yoshihiro Kanamori  
3rd Author's Affiliation University of Tsukuba (Tsukuba Univ.)
4th Author's Name Jun Mitani  
4th Author's Affiliation University of Tsukuba (Tsukuba Univ.)
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Speaker Author-1 
Date Time 2020-03-13 11:20:00 
Presentation Time 15 minutes 
Registration for AS 
Paper # AIT2020-91 
Volume (vol) vol.44 
Number (no) no.10 
Page pp.141-144 
Date of Issue 2020-03-06 (AIT) 

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