한국정보통신학회논문지 (Journal of the Korea Institute of Information and Communication Engineering)

  • 제6권4호
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  • Pages.639-644
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  • 2002
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  • 2234-4772(pISSN)
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  • 2288-4165(eISSN)
한국정보통신학회 (The Korea Institute of Information and Commucation Engineering)
권호 표지

국부 통계를 기반으로 한 가중차수 통계의 데이터 의존 선형조합 필터링(DD-LWOS)

Data Department Linear Combination of Weighted Order Statistics(DD-LWOS) Filtering Based on Local Statistics

  • 발행 : 2002.06.01
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⟨ 이전 논문 다음 논문 ⟩

초록

순위 차수 정보와 공간정보를 이용하는 비선형 필터들은 부가 잡음에 의해 발생되는 불안정 신호를 복원하기 위해서 많이 제안되고 있으면 본 논문에서는 국부통계를 기반으로 계수 변화를 하는 데이터 의존 LWOS필터를 제안하고자 한다. LWOS필터［1］는 가우시안 형태의 잡음뿐만 아니라 미세한 신호를 보호하면서 비임펄스 잡음을 제거할 수 있었으며, 임펄스 잡음에 의해서 방해를 받을 때는 DD-LWOS 필터보다 DD-LWOS2 필터가 더 좋은 결과를 가진다는 것을 확인할 수 있었다.

Nonlinear filters which are utilized rank-order information and temporal-order information, have many proposed, in order to restore nonstationary signals which are corrupted by additive noise. In this paper, we propose a data-dependent LWOS filter whose coefficients change based on local statistics. LWOS(Linear Combination of Weighted Order Statistics) filters［1］which also utilized two informations, and have properties of efficient impulsive and nonimpulsive noise attenuation and sufficiently details and edges preservation. DD-LWOS filters can remove non-impulsive oises while preserving signal details. DD-LWOS2 filter gets more better performance than DD-LWOS filter when input image corrupted by additive noise which includes Impulsive noise components.

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참고문헌

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