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Paper Abstract and Keywords
Presentation 2010-11-12 11:35
Geometrical Inavariable for People Number Estimation using Video Camera
Hiroyuki Arai, Isao Miyagawa, Hideki Koike (NTT)
Abstract (in Japanese) (See Japanese page) 
(in English) We had proposed a technique for estimating the number of people in a video sequence using calibrated monocular camera. In this paper we focus on the geometrical invariable which plays an important role in the proposed method. In the proposed method, “standard surface area(SSA)” was defined as a scale transformation coefficient from pixel to surface area on human body in real world, for each pixel, according to the camera calibration parameters. The sum of SSA along the foreground pixels which corresponds to entire human body becomes invariable which does not depend on the location of the person in real world. However the sum of SSA has some errors in the case each pixel corresponds to rather large surface are on human body. So, in this paper, we evaluate the errors quantitatively. Moreover, the invariable is defined only for simple rectangle shape. Though the silhouette of standing human can be roughly approximated with rectangle shape, the approximation causes some errors. Therefore, we expand the invariable for the case of arbitrary shape. Experiment shows the validity of the expansion.
Keyword (in Japanese) (See Japanese page) 
(in English) People number estimation / Camera calibration / Camera calibration / Video Surveillance / / / /  
Reference Info. ITE Tech. Rep., vol. 34, no. 45, ME2010-163, pp. 41-45, Nov. 2010.
Paper # ME2010-163 
Date of Issue 2010-11-04 (BCT, ME, AIT) 
ISSN Print edition: ISSN 1342-6893
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Conference Information
Conference Date 2010-11-11 - 2010-11-12 
Place (in Japanese) (See Japanese page) 
Place (in English) Kagoshima Univ 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To ME 
Conference Code 2010-11-IE-AIT-BCT-ME 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Geometrical Inavariable for People Number Estimation using Video Camera 
Sub Title (in English)  
Keyword(1) People number estimation  
Keyword(2) Camera calibration  
Keyword(3) Camera calibration  
Keyword(4) Video Surveillance  
1st Author's Name Hiroyuki Arai  
1st Author's Affiliation NTT Cyber Space Laboratories (NTT)
2nd Author's Name Isao Miyagawa  
2nd Author's Affiliation NTT Cyber Space Laboratories (NTT)
3rd Author's Name Hideki Koike  
3rd Author's Affiliation NTT Cyber Space Laboratories (NTT)
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Speaker Author-1 
Date Time 2010-11-12 11:35:00 
Presentation Time 25 minutes 
Registration for ME 
Paper # BCT2010-80, ME2010-163, AIT2010-121 
Volume (vol) vol.34 
Number (no) no.45 
Page pp.41-45 
Date of Issue 2010-11-04 (BCT, ME, AIT) 

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