The KIPS Transactions:PartB (정보처리학회논문지B)

Korea Information Processing Society (한국정보처리학회)
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Flame Detection Using Haar Wavelet and Moving Average in Infrared Video

적외선 비디오에서 Haar 웨이블릿과 이동평균을 이용한 화염검출

  • Published : 2009.10.31
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Abstract

In this paper, we propose a flame detection method using Haar wavelet and moving averages in outdoor infrared video sequences. Our proposed method is composed of three steps which are Haar wavelet decomposition, flame candidates detection, and their tracking and flame classification. In Haar wavelet decomposition, each frame is decomposed into 4 sub- images(LL, LH, HL, HH), and also computed high frequency energy components using LH, HL, and HH. In flame candidates detection, we compute a binary image by thresholding in LL sub-image and apply morphology operations to the binary image to remove noises. After finding initial boundaries, final candidate regions are extracted using expanding initial boundary regions to their neighborhoods. In tracking and flame classification, features of region size and high frequency energy are calculated from candidate regions and tracked using queues, and we classify whether the tracked regions are flames by temporal changes of moving averages.

본 논문은 적외선 영상에서 Haar 웨이블릿과 이동평균을 이용한 화염검출 방법을 제안한다. 제안된 방법은 Haar 웨이블릿 변환 단계, 화염 후보영역 검출단계, 화염후보영역 추적 및 화염 판단의 3단계로 구성된다. Haar 웨이블릿 변환 단계는 Haar 웨이블릿을 적용하여 입력영상 프레임을 4개의 부영상으로 분할하고, 고주파 영상을 합성하여 에너지를 계산한다. 화염 후보영역 검출단계에서는 저주파영역에서 임계값을 적용하여 높은 밝기 값을 갖는 이진영상을 구한 다음, 연결 알고리즘을 이용하여 초기 화염후보영역의 경계선을 구하고, 영역확장 방법을 이용하여 최종 화염 후보영역을 계산한다. 화염후보영역의 추적 및 화염 판단 단계에서는 화염후보영역의 크기와 고주파 성분 에너지 평균을 계산하고, 큐를 사용하여 추적하면서, 계산된 특징의 이동평균이 변동되는 영역을 화염영역으로 판단한다.

Keywords

References

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