Motion estimation using low-band-shift method for wavelet-based moving-picture coding

  • Authors:
  • Hyun-Wook Park;Hyung-Sun Kim

  • Affiliations:
  • Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Taejon;-

  • Venue:
  • IEEE Transactions on Image Processing
  • Year:
  • 2000

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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