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Luminance Correction Algorithm Based on Measuring Angle for the Portable Luminance Measurement System

휴대용 휘도측정시스템의 측정각도기반 휘도보정알고리즘

  • Sun, Eun-Hey (Dept. of Electrical, Electronic and Control Engineering, Hankoyng National University) ;
  • Kim, Dongyeon (Dept. of Electrical, Electronic and Control Engineering, Hankoyng National University) ;
  • Kim, Yong-Tae (Dept. of Electrical, Electronic and Control Engineering, Hankoyng National University)
  • 선은혜 (한경대학교 전기전자제어공학과) ;
  • 김동연 (한경대학교 전기전자제어공학과) ;
  • 김용태 (한경대학교 전기전자제어공학과)
  • Received : 2016.07.28
  • Accepted : 2016.08.11
  • Published : 2016.08.25

Abstract

In this paper, we propose a luminance correction algorithm based on measuring position for potable luminance measurement system. Measurement position and angle have an affect on the luminance value. We improve the position-based luminance measurement system using luminance correction algorithm based on the measuring angle. We analyze change of luminance value according to the measurement distance and angle from camera and light source. The certified point-luminance meter is used to evaluate a scene luminance measuring method using the image information of camera. Also, we derive an expression equation for evaluating luminance value from determined position. The performances of the proposed system are verified by using comparative experiments with the point-luminance meter using experimental signboard.

본 논문에서는 휴대용 휘도측정시스템의 측정위치기반 휘도보정알고리즘을 제안한다. 측정거리와 측정각도에 따라 휘도 값은 변화하며, 측정거리와 측정각도를 고려한 알고리즘을 적용하여 기존에 개발된 영상기반 휘도측정시스템의 오차를 개선한다. 카메라 영상기반의 휘도 정보를 정확하게 획득하는 면측정방법을 제안하기 위해서 점휘도계로 측정대상물과의 측정각도에 따른 휘도 값의 변화를 측정한다. 측정거리, 측정각도와 휘도 값 간의 연관성을 수식으로 나타내었고, 측정위치를 고려한 알고리즘을 제안한다. 실험용 간판을 대상으로 점휘도계와 제안한 휘도측정시스템을 비교 평가 실험하고 제안한 휘도측정시스템의 성능을 검증하였다.

Keywords

References

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