Journal of IKEEE (전기전자학회논문지)

Institute of Korean Electrical and Electronics Engineers (한국전기전자학회)
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Fast Blind Image Denoising Algorithm Based on Estimating Noise Parameters

노이즈 매개변수 예측 기반 고속 노이즈 제거 방식

  • Nguyen, Tuan-Anh (School of Electronic Engineering, Soongsil University) ;
  • Kim, Beomsu (School of Electronic Engineering, Soongsil University) ;
  • Hong, Min-Cheol (School of Electronic Engineering, Soongsil University)
  • Received : 2014.09.24
  • Accepted : 2014.11.21
  • Published : 2014.12.31
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Abstract

In this paper, a fast single image blind denoising algorithm is presented, where noise parameters are estimated by local statistics of an observed degraded image without a prior information about the additive noise. The estimated noise parameters are used to define the constraints on the noise detection which is coupled with the 1st-order Markov Random Field. In addition, an adaptive modified weighted Gaussian filter is introduced, where variable window sizes and weighting coefficients defined by the constraints are used to control the degree of the smoothness of the reconstructed image. The experimental results demonstrate the capability of the proposed algorithm. Please put the abstract of paper here.

본 논문에서는 노이즈에 대한 사전 정보 없이 단일 왜곡 영상으로부터 노이즈 매개 변수를 예측하고, 예측된 매개변수를 이용한 고속 노이즈 검출 및 제거하는 기법에 대해 제안한다. 왜곡 영상의 국부 통계를 이용하여 예측된 노이즈 매개 변수는 노이즈 검출기를 위한 사전 제약 조건으로 활용되며, 상기 제약 조건은 1차 마르코프 랜덤 장과 결합하여 노이즈 검출기를 구성하게 된다. 더불어 노이즈 검출 과정에서 설정된 제약 조건 및 매개 변수를 기반으로 복원 영상의 완화도를 제어하기 위한 가변 필터 차수의 가중치 기반 적응 노이즈 제거 필터를 제안한다. 실험 결과를 통해 제안 방식의 우수성을 검증할 수 있었다.

Keywords

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