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Motion estimation using low-band-shift method for wavelet-based moving-picture coding
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DOI：10.1109/83.841935.png)
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Abstract
En 中文
The discrete wavelet transform (DWT) has several advantages of multiresolution analysis and subband decomposition, which has been successfully used in image processing. However, the shift-variant property is intrinsic due to the decimation process of the wavelet transform, and it makes the wavelet-domain motion estimation and compensation inefficient. To overcome the shift-variant property, a low-band-shift method is proposed and a motion estimation and compensation method in the wavelet domain is presented. The proposed method has a superior performance to the conventional motion estimation methods in terms of the mean absolute difference (MAD) as well as the subjective quality, The proposed method can be a model method for the motion estimation in wavelet domain just like the full-search block matching in spatial domain.
Keywords:
block matching
discrete wavelet transform (DWT)
low-band-shift
motion estimation and compensation
wavelet block
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