제어로봇시스템학회:학술대회논문집
- 1997.10a
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- Pages.1387-1390
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- 1997
Image restoration based on wavelet filter bank
웨이블렛 필터 뱅크를 이용한 영상복원
Abstract
In this paper we propose a novel way to restore degraded image using wavelet transform & filterbank. First, we devide a degraded image into 4-suband images using UDWT(Undecimated Wavelet Transform), and then use a proper CLS (Constrained Least Square) filter in each subband. Using a proper CLS filter ineach subband, we can save high grequency components of original image. We reconstruct a restored image from the downsampled subband images using wavelet tansform. Even though there is a trade-off between ISNR and calculation loads, we reduce the calculation loads by using wavelet transform in reconstruction with a negligible degradatiion in ISNR.