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2006 Fiscal Year Final Research Report Summary

Image Processing Method for Realizing Privacy Protection and Object Recognition for Fixed Monitoring Camera Systems

Research Project

Project/Area Number 17560329
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Communication/Network engineering
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

KITAZAWA Hitoshi  Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Professor, 大学院共生科学技術研究院, 教授 (60345329)

Co-Investigator(Kenkyū-buntansha) TANAKA Toshihisa  Tokyo University of Agriculture and Technology, Institute of Symbiotic Science and Technology, Associate professor, 大学院共生科学技術研究院, 助教授 (70360584)
Project Period (FY) 2005 – 2006
KeywordsImage processing / Privacy protection / Fixed monitoring camera / Watermarking / JPEG compression
Research Abstract

Public video surveillance by security camera is becoming more and more important for investigation and deterrent of crimes. Therefore we propose a new framework for security camera system which solves the privacy protection problem. The privacy protection is realized by masking or erasing moving objects in the monitored images. The original moving object images are encrypted and watermarked into the masked image. When it is necessary, the original image can be reconstructed using a special viewer with a password.
1. Scrambling and erasing:
First, generates a masked image in which moving objects are scrambled or erased. By the scrambling, all pixels in a moving object are permuted randomly, and by the erasing, all pixels in a moving object are replaced by the corresponding pixels in the background image. The masked images show "what is happening" but do not show "who is there."
2. Generating the masked images:
The extracted moving object is compressed by JPEG, and embedded into masked image. The masked image and the moving object are compressed by high compression level and low compression level, respectively. As a result, we decrease data size by approximately 25% compared to when low compression level is used for both images. Moreover, by utilizing common background image during N frames, data size was further reduced by approximately 50%.
3. Data encryption and reconstruction:
The extracted moving object is encrypted by the advanced encryption standard (AES). Moreover, we can selectively reconstruct one of the masked objects while keep the other objects masked.
4. Improvement of moving object extraction:
The proposed method is strongly influenced by the moving object extraction. We proposed a moving object extraction method which uses normalized vector distance (NVD) of RGB values. We state this method can realize shadow detection under direct sunlight, and decrease the extraction error of moving object.

  • Research Products

    (13 results)

All 2007 2006 2005

All Journal Article (12 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] プライバシ保護と物体の識別を両立するための動画像処理手法の検討2007

    • Author(s)
      藪田顕一, 北澤仁志, 田中聡久
    • Journal Title

      情報処理学会第69回全国大会予稿集 69

      Pages: 4-6

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] 色情報を用いた正規化距離による影の判別2007

    • Author(s)
      浅見雅彦, 北澤仁志
    • Journal Title

      情報処理学会第69回全国大会予稿集 69

      Pages: 3R-3

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] プライバシ保護のための動画像処理におけるフレーム間相関の利用2007

    • Author(s)
      藪田顕一, 北澤仁志, 田中聡久
    • Journal Title

      電子情報通信学会,技術研究報告,IE2007-1 Vol.107 No.23

      Pages: 1-6

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A Study on Method of Image Processing for A Security and Privacy Protection Camera System (in Japanese)2007

    • Author(s)
      Kenichi Yabuta, Hitoshi Kitazawa, Toshihisa Tanaka
    • Journal Title

      The 69th National Convention of IPSJ

      Pages: 4-6

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Shadow Detection by Normalized Vector Distance of Color Information (in Japanese)2007

    • Author(s)
      Masahiko Asami, Hitoshi Kitazawa
    • Journal Title

      The 69th National Convention of IPSJ

      Pages: 3R-3

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Data Compression Using Interframe Correlation for a Security Camera System With Privacy Protection (in Japanese)2007

    • Author(s)
      Kenichi Yabuta, Hitoshi Kitazawa, Toshihisa Tanaka
    • Journal Title

      IEICE Technical Report, SIP2007-1, IE2007-1 Vol.107, No.23

      Pages: 1-6

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A New Concept of Real-Time Security Camera Monitoring With Privacy Protection by Masking Moving Objects2006

    • Author(s)
      Kenichi Yabuta, Hitoshi Kitazawa, Toshihisa Tanaka
    • Journal Title

      Proceedings on IS&T/SPIE 18th Annual Symposium, Electronic Imaging. Proc. SPIE Vol. 6063

      Pages: No.6063-23

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A New Concept of Real-Time Security Camera Monitoring With Privacy Protection by Masking Moving Objects2006

    • Author(s)
      Kenichi Yabuta, Hitoshi Kitazawa, Toshihisa Tanaka
    • Journal Title

      Proceedings on IS&T/SPIE 18th Annual Symposium, Electronic Imaging, Proc.SPIE Vol.6063, No.6063-23

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] プライバシー保護と被写体の識別を両立させる固定モニタカメラ映像処理手法2005

    • Author(s)
      藪田顕一, 北澤仁志, 田中聡久
    • Journal Title

      電子情報通信学会,技術研究報告,SPI2005-3 Vol.105 No.29

      Pages: 13-18

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A New Concept of Security Camera Monitoring With Privacy Protection by Masking Moving Objects2005

    • Author(s)
      Kenichi Yabuta, Hitoshi Kitazawa, Toshihisa Tanaka
    • Journal Title

      Proceedings on 6th Pacific-Rim Conference on Multimedia, part 1. LNCS 3767

      Pages: 831-842

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] A fixed monitoring camera image processing method satisfying both privacy protection and object recognition (in Japanese)2005

    • Author(s)
      Kenichi Yabuta, Hitoshi Kitazawa, Toshihisa Tanaka
    • Journal Title

      IEICE Technical Report, SIP2005, IE2005-3 Vol.105, No.29

      Pages: 13-18

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] A New Concept of Security Camera Monitoring With Privacy Protection by Masking Moving Objects2005

    • Author(s)
      Kenichi Yabuta, Hitoshi Kitazawa, Toshihisa Tanaka
    • Journal Title

      Proceedings on 6th Pacific-Rim Conference on Multimedia, Part 1, LNCS 3767

      Pages: 831-842

    • Description
      「研究成果報告書概要(欧文)」より
  • [Patent(Industrial Property Rights)] 映像変更装置等2005

    • Inventor(s)
      北澤仁志
    • Industrial Property Rights Holder
      東京農工大学
    • Industrial Property Number
      特願2005-301072
    • Filing Date
      2005-10-15
    • Description
      「研究成果報告書概要(和文)」より

URL: 

Published: 2008-05-27  

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