A 2-D orientation adaptive prediction filter in lifting structures for image coding
IEEE TRANSACTIONS ON IMAGE PROCESSING, cilt.15, sa.1, ss.106-111, 2006 (SCI-Expanded, Scopus)
- 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
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- 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.