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학술대회 Image Resolution Enhancement using Inter-Subband Correlation in Wavelet Domain
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저자
Yinji Piao, 신일홍, 박현욱
발행일
200709
출처
International Conference on Image Processing (ICIP) 2007, pp.445-448
DOI
https://dx.doi.org/10.1109/ICIP.2007.4378987
협약과제
07MR2900, 통방융합 환경에서의 유비쿼터스 콘텐츠 서비스 기술 개발, 유정주
초록
Wavelet-based resolution enhancement methods improve the image resolution by estimating the high-frequency band information. In this paper, we propose a new resolution enhancement method using inter-subband correlation in which the sampling phase in DWT is considered. Interpolation filters are designed by analyzing correlations between subbands having different sampling phases in the lower level, and applied to the correlated subbands in the higher level. The filters are estimated under the assumption that correlations between two subbands in the higher level are similar to that in the lower level in DWT. The experimental results show that our proposed method outperforms the conventional interpolation methods including the other wavelet-based methods with respect to peak signal-to-noise-ratio (PSNR) as well as the subjective quality. © 2007 IEEE.
키워드
Image enhancement, Image resolution, Wavelet transforms
KSP 제안 키워드
Enhancement method, High Frequency(HF), Image enhancement, Image resolution enhancement, Interpolation method, Peak-Signal-to-Noise-Ratio(PSNR), Signal noise ratio(SNR), Subjective quality, Wavelet transform(WT), frequency band, interpolation filter