실루엣 에지를 찾거나 디스플레이하는 것은 컴퓨터 비전에서부터 비사실적인 렌더링(nonphotorealistic rendering)에 이르기까지 여러 응용분야에서 중요한 의미를 가진다. NPR(nonphotorealistic rendering)에서 가장 초점을 두는 것은 컴퓨터로 렌더링된 결과가 사람이 그린듯한 효과를 줄 수 있느냐에 있다. 본 논문에서는 점진적 메쉬와 실루엣 에지 렌더링을 통해 사람이 임의의 객체를 점진적으로 스케치하는 효과를 보여 줄 수 있는 방법을 제시한다. 다단계 메쉬 생성은 대용량의 메쉬를 효율적으로 다루기 위한 것으로 점진적인 렌더링이나 전송, 상세도, 제어 등에 이용되는 기술이다. 메쉬 간략화에서는 볼륨과 정계를 보존 할 수 있는 간략화 기법을 이용하였다. 간략화 수행시 원본 메쉬에 대한 히스토리를 저장할 수 있는 점진적 메쉬(Progressive Mesh)구조를 구성한 뒤 기본메쉬를 점진적으로 상세하게 해 나감으로써 실루엣 렌더링을 수행하게 된다. 실루엣 에지에 대해 파라미터화된 브러쉬 함수(Parameterized Brush Functions)를 적용하여 다양한 스타일로 점진적인 스케칭 효과를 낼 수 있는 기법을 제시한다.
KSP Keywords
Non-photorealistic rendering, Progressive mesh
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