A 2-D orientation adaptive prediction filter in lifting structures for image coding

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Gerek O., Cetin A.

IEEE TRANSACTIONS ON IMAGE PROCESSING, vol.15, no.1, pp.106-111, 2006 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 15 Issue: 1
  • Publication Date: 2006
  • Doi Number: 10.1109/tip.2005.859369
  • Journal Name: IEEE TRANSACTIONS ON IMAGE PROCESSING
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.106-111
  • Keywords: adaptive wavelet transform, image coding, orientation adaptive lifting, WAVELET TRANSFORMS, SCHEME
  • Anadolu University Affiliated: No

Abstract

Lifting-style implementations of wavelets are widely used in image coders. A two-dimensional (2-D) edge adaptive lifting structure, which is similar to Daubechies 513 wavelet, is presented. The 2-D prediction filter predicts the value of the next polyphase component according to an edge orientation estimator of the image. Consequently, the prediction domain is allowed to rotate +/- 45 degrees in regions with diagonal gradient. The gradient estimator is computationally inexpensive with additional costs of only six subtractions per lifting instruction, and no multiplications are required.