Statistical background modeling for non-stationary camera

  • Authors:
  • Ying Ren;Chin-Seng Chua;Yeong-Khing Ho

  • Affiliations:
  • School of Electrical and Electronic Engineering, Nanyang Technological University, Block S1, Nanyang Avenue, 639798 Singapore, Singapore;School of Electrical and Electronic Engineering, Nanyang Technological University, Block S1, Nanyang Avenue, 639798 Singapore, Singapore;School of Electrical and Electronic Engineering, Nanyang Technological University, Block S1, Nanyang Avenue, 639798 Singapore, Singapore

  • Venue:
  • Pattern Recognition Letters
  • Year:
  • 2003

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Abstract

A new background subtraction method is proposed in this paper for the foreground detection from a non-stationary background. Usually, motion compensation is required when applying background subtraction to a non-stationary background. In practice, it is difficult to realize this to sufficient pixel accuracy. The problem is further complicated when the moving objects to be detected/tracked are small, since the pixel error in motion compensating the background will hide the small targets. A spatial distribution of Gaussians model is proposed to deal with moving object detection where the motion compensation is not exact but approximated. The distribution of each background pixel is temporally and spatially modeled. Based on this statistical model, a pixel in the current frame is classified as belonging to the foreground or background. In addition, a new background restoration and adaptation algorithm is developed for the non-stationary background over an extended period of time. Test cases involving a surveillance system to detect small moving objects (human and car) within a highly textured background and a pan-tilt human tracking system are demonstrated successfully.