상세정보
학술지
Discrete-cosine-transform-domain Downsizing with Windowing Operation
- 발행일
- 200712
- 출처
- Journal of Electronic Imaging, v.16 no.4, pp.1-3
- ISSN
- 1017-9909
- 출판사
- SPIE,IS&T
- 협약과제
- 07MR2900, 통방융합 환경에서의 유비쿼터스 콘텐츠 서비스 기술 개발, 유정주
- 초록
- A simple and effective method is presented for discrete-cosine-transform (DCT)-domain downsizing. Various methods employed in DCT-domain downsizing simply reuse the frequency component of DCT, which shows a severe aliasing effect. The proposed approach extends the downsizing method for alleviating or reducing the aliasing effect with a windowing operation, which adjusts the magnitude of the DCT coefficient. Visual inspection showed satisfactory results, with no complexity overhead and performance degradation regarding the peak-signal-to noise ratio (PSNR) after upsampling. © 2007 SPIE and IS&T.
- KSP 제안 키워드
- Aliasing effect, DCT coefficients, Frequency components, performance degradation, visual inspection