위신호 제거

안티앨리어싱 적용 전(왼쪽)과 후(오른쪽)
안티앨리어싱의 적용 예

위신호 제거(僞信號制擧, 영어: Anti-Aliasing 안티에일리어싱[*], 줄여서 AA)는 높은 해상도의 신호를 낮은 해상도에서 나타낼 때 생기는 계단 현상(깨진 패턴)을 최소화하는 방법이다. 그래픽 프로그램에서는 포토샵에서 어도비 일러스트레이터로 작업한 EPS 그림 파일을 불러올 때 이 기능을 제공한다.

샘플링된 오디오 신호의 위신호를 제거하는 작업 역시 위신호 제거라고 불린다.

종류

  • 위신호 제거필터 (Anti-aliasing filter), 오디오 프로그램 따위에서 신호의 대역폭을 제한하기 위해 신호 샘플러 앞에 사용되는 필터
  • 공간축선 안티에일리어싱 (Spatial anti-aliasing), 고해상도의 이미지를 낮은 해상도로 표현할 때 생기는 위신호를 최소화 하기 위한 기술
  • 시간축선 안티에일리어싱 (Temporal anti-aliasing), 이미지의 이동에서 생기는 일시적 위신호를 줄이기 위한 기술

역사

위신호 제거의 역사의 중대한 초기 업적은 다음을 포함한다:

같이 보기

외부 링크

이 글은 컴퓨터 과학에 관한 토막글입니다. 여러분의 지식으로 알차게 문서를 완성해 갑시다.

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