대한전자공학회논문지SP (Journal of the Institute of Electronics Engineers of Korea SP)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

웨이블릿 영역에서 색차를 이용한 디모자이킹 방법

Demosaicking Method Using Color Difference in Wavelet Domain

  • 정보규 (부산대학교 전자전기공학부) ;
  • 성영민 (부산대학교 전자전기공학부) ;
  • 김병철 (부산대학교 바이오메다컬공학과) ;
  • 엄일규 (부산대학교 전자전기공학부)
  • Jeong, Bo-Gyu (School of Electrical Engineering, Pusan National University) ;
  • Seong, Young-Min (School of Electrical Engineering, Pusan National University) ;
  • Kim, Byung-Chul (Department of Biomedical Engineering, Pusan National University) ;
  • Eom, Il-Kyu (School of Electrical Engineering, Pusan National University)
  • 투고 : 2010.01.05
  • 심사 : 2010.04.23
  • 발행 : 2010.07.25
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초록

본 논문에서는 웨이블릿 영역에서 색차를 이용한 효과적인 디모자이킹 방법을 제안한다. 저주파 영역의 웨이블릿 계수는 관찰된 고주파 계수를 이용한 에지 방향적인 보간에 의해 구해진다. 손실된 고주파 계수는 추정된 저주파 계수에 의해 얻어진다. 고주파수 영역에서 결함을 줄이고 시각적인 질을 향상시키기 위해서 웨이블릿 영역에서 색차 방법을 이용하여 고주파수 계수를 업데이트 한다. 웨이블릿 영역에서 제안한 디모자이킹 방법을 시뮬레이션하고, 기존의 디모자이킹 방법들과 비교를 하였다. 실험 결과를 통해 제안 방법이 향상된 디모자이킹 결과를 발생시킨다는 것을 보여주었다.

In this paper, we present an efficient demosaicking method using the difference between color channels in the wavelet domain. In our method, the low frequency wavelet coefficients are obtained by an edge-directive interpolation using the observed high frequency coefficients. The missing high frequency coefficients are obtained by the estimated low frequency coefficients. In order to reduce artifacts in high frequency domain and to improve visual quality, we update the high frequency coefficient using the color difference rule in the wavelet domain. We simulate our demosaicking method in the wavelet domain and compare our algorithm to the existing demosaicking schemes. Experimental results illustrate that the proposed method can generate enhanced demosaicking results.

키워드

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