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

The Korea Institute of Information and Commucation Engineering (한국정보통신학회)
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Adaptive Weight Filter Algorithm for Restoration Images Corrupted by High Density Impulse Noise

고밀도 임펄스 잡음에 훼손된 영상 복원을 위한 적응형 가중치 필터 알고리즘

  • Cheon, Bong-Won (Department of Intelligent Robot Eng., Pukyong National University) ;
  • Kim, Nam-Ho (School of Electrical Engineering, Pukyong National University)
  • Received : 2022.08.10
  • Accepted : 2022.08.30
  • Published : 2022.10.31
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Abstract

Recently, due to the influence of the 4th industrial revolution and the development of communication media, various digital video equipment are being used in industrial fields. Image data is easily damaged by noise in the process of acquiring and transmitting and receiving from the camera and sensor, and since the damaged image has a great effect on the processing of the system, noise removal is essential. In this paper, a weight filter algorithm using a weight graph is proposed to restoration images damaged by high-density impulse noise. The proposed algorithm obtains a weight graph using pixel values inside the filtering mask of the image, and restores the image by applying the final weight to the filtering mask. Simulation was conducted to analyze the noise removal performance of the proposed algorithm, and the magnified image and PSNR were used to compare with the existing method. The resulting image of the proposed algorithm showed excellent performance by removing high-density impulse noise.

최근 4차 산업혁명의 영향과 통신매체의 발전으로 다양한 디지털 영상장비가 산업현장에서 사용되고 있다. 영상 데이터는 카메라와 센서로부터 취득되는 과정 및 송수신 과정에서 잡음에 훼손되기 쉬우며, 훼손된 영상은 시스템의 처리과정에 영향을 미치기 때문에 잡음제거가 필수적으로 선행되고 있다. 본 논문에서는 고밀도의 임펄스 잡음에 훼손된 영상을 복원하기 위해 가중치 그래프를 사용한 가중치 필터 알고리즘을 제안하였다. 제안한 알고리즘은 영상의 필터링 마스크 내부의 화소값을 사용하여 가중치 그래프를 구하였으며, 최종 가중치를 필터링 마스크에 적용하여 영상을 복원하였다. 제안하는 알고리즘의 잡음제거 성능을 분석하기 위해 시뮬레이션을 진행하였으며, 확대영상 및 PSNR을 사용하여 기존 방법과 비교하였다. 제안한 알고리즘의 결과 영상은 고밀도 임펄스 잡음을 제거하며 우수한 성능을 보였다.

Keywords

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