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, cilt.15, sa.1, ss.106-111, 2006 (SCI-Expanded) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 15 Sayı: 1
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1109/tip.2005.859369
  • Dergi Adı: IEEE TRANSACTIONS ON IMAGE PROCESSING
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.106-111
  • Anahtar Kelimeler: adaptive wavelet transform, image coding, orientation adaptive lifting, WAVELET TRANSFORMS, SCHEME
  • Anadolu Üniversitesi Adresli: Hayır

Özet

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.