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3차 스플라인 보간법을 이용한 Salt and Pepper 잡음 제거

Salt and Pepper Noise Removal using Cubic Spline Interpolation

  • Kwon, Se-Ik (Dept. of Control and Instrumentation Eng., Pukyong National University) ;
  • Kim, Nam-Ho (Dept. of Control and Instrumentation Eng., Pukyong National University)
  • 투고 : 2016.06.29
  • 심사 : 2016.08.11
  • 발행 : 2016.10.31

초록

현재, 디지털 시대의 급속 발전과 함께 멀티미디어 관련 영상 장치들이 대중화 되고 있다. 그러나 영상 데이터는 전송하는 과정에서 여러 원인으로 열화가 발생하며 주로 salt and pepper 잡음이 대표적이다. salt and pepper 잡음을 제거하기 위한 대표적인 방법에는 SWMF, RSIF, MNRF가 있으며 기존의 방법들은 고밀도 salt and pepper 잡음 환경에서 잡음 제거 특성이 다소 미흡하다. 따라서 본 논문에서는 salt and pepper 잡음을 제거하기 위해 잡음 판단 후, 중심화소가 비잡음인 경우 원 화소 그대로 보존하고, 잡음인 경우, 국부 마스크 네 방향으로 세분화하여 비잡음 화소가 가장 많은 방향에 대해 3차 스플라인 보간법을 적용하여 처리하는 알고리즘을 제안하였다. 그리고 객관적 판단을 위해 기존의 방법들과 비교하였으며, 판단의 기준으로 PSNR(peak signal to noise ratio)을 사용하였다.

Currently, with the rapid development in digital era, the image equipment related to multi-media is becoming commercialized. However, in the process of transmitting image data, deterioration occurs due to various causes, and the most representative deterioration is salt and pepper noise. There are many methods of eliminating salt and pepper noise such as SWMF, RSIF, MNRF, which are rather insufficient in eliminating noise in high-density slat and pepper noise environment. Therefore, in order to eliminate salt and pepper noise, this thesis proposes an algorithm by first judging the noise, and when the center pixel value is non-noise, the original pixel is preserved, and when it is noise, the partial mask is subdivided into 4 directions to apply cubic spline interpolation to the direction with most non-noise pixels. Also, for the objective judgement, it was compared to existing methods, and the PSNR(peak signal to nise ratio) was set as the judgement standard.

키워드

참고문헌

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피인용 문헌

  1. 복합잡음 제거를 위한 다중 필터에 관한 연구 vol.21, pp.11, 2016, https://doi.org/10.6109/jkiice.2017.21.11.2029