title: Motion estimation using low-band-shift method for wavelet-based moving-picture coding.
abstract: 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 the spatial domain.
authors.affiliation: Dept. of Electr. Eng., Korea Adv. Inst. of Sci. and Technol., Taejon. hwpark@athena.kaist.ac.kr
authors.forename: H W
authors.initials: HW
authors.lastname: Park
authors.forename: H S
authors.initials: HS
authors.lastname: Kim