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

The Institute of Electronics and Information Engineers (대한전자공학회)
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Color halftoning based on color correction using vector error diffusion

벡터 오차 확산법을 이용한 색보정 기반의 칼라 중간조 처리법

  • Choi, Woen-Hee (School of Electronic and Electrical Engineering, kyungpook National University) ;
  • Lee, Cheol-Hee (Computer Eng, Kyungwoon University) ;
  • Kim, Jeong-Yeop (School of Electronic and Electrical Engineering, kyungpook National University) ;
  • Kim, Hee-Soo (School of Electronic and Electrical Engineering, kyungpook National University) ;
  • Ha, Yeong-Ho (School of Electronic and Electrical Engineering, kyungpook National University)
  • 최원희 (경북대학교 전자전기공학부) ;
  • 이철희 (경운대학교 컴퓨터공학과) ;
  • 김정엽 (경북대학교 전자전기공학부) ;
  • 김희수 (경북대학교 전자전기공학부) ;
  • 하영호 (경북대학교 전자전기공학부)
  • Published : 2000.09.25
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Abstract

This paper proposes a new color halftorning method using color correction by vector error diffusion to reduce color difference, necessarily appears on cross-media color reproduction In order to predict output colors on each device, a neural system IS applied and mean prediction errors in device characterization for monitor and printer are defined to calculate the thresholds for color correction Thus, color difference between monitor and printer is compared per each pixel If color difference is larger than the predetermined mean prediction errors, the halftoned dots to the current pixel are rearranged by vector error diffusion The proposed method can reduce the smear artifact by selective vector error diffusion and decrease color difference on cross- media color reproduction by color correction.

본 논문에서는 벡터오차 확산법을 이용한 색수정 방법으로 장치간 색재현시 필연적으로 발생하는 색차를 줄이는 칼라 하프토닝(halftoning)법을 제안하였다 각 장치의 출력색을 추정하기 위하여 신경망을 이용하였으며 장치 특성화 과정의 평균 추정 오차를 정의하여 이를 색수정의 임계치로 정의하였다 즉 화소 단위로 색차를 비교하여 최대 허용 색차(임계치)보다 클 경우 그 화소의 프린팅을 위한 이진 도트 집합은 벡터 오차 확산법을 이용해 재배열된다 제안된 방법은 선택적으로 벡터 오차 확산법을 적용함으로써 기존의 벡더 오차 확산법이 갖는 스미어 현상(smear effect)을 줄일 수 있으며 색수정을 통하여 필연적으로 발생하는 장치간 색차를 줄일 수 있었다.

Keywords

References

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