로봇학회논문지 (The Journal of Korea Robotics Society)

  • 제6권1호
  • /
  • Pages.18-26
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  • 2011
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  • 1975-6291(pISSN)
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  • 2287-3961(eISSN)
한국로봇학회 (Korea Robotics Society)
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비전 센서의 앨리어싱 방지 필터링 모방 기법

Emulation of Anti-alias Filtering in Vision Based Motion Mmeasurement

  • 김정현 (경성대학교 메카트로닉스공학과)
  • 투고 : 2010.08.15
  • 심사 : 2010.12.30
  • 발행 : 2011.02.28
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초록

This paper presents a method, Exposure Controlled Temporal Filtering (ECF), applied to visual motion tracking, that can cancel the temporal aliasing of periodic vibrations of cameras and fluctuations in illumination through the control of exposure time. We first present a theoretical analysis of the exposure induced image time integration process and how it samples sensor impingent light that is periodically fluctuating. Based on this analysis we develop a simple method to cancel high frequency vibrations that are temporally aliased onto sampled image sequences and thus to subsequent motion tracking measurements. Simulations and experiments using the 'Center of Gravity' and Normalized Cross-Correlation motion tracking methods were performed on a microscopic motion tracking system to validate the analytical predictions.

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참고문헌

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