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

Omer N Gerek; A Enis Cetin

doi:10.1109/tip.2005.859369

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

IEEE Trans Image Process. 2006 Jan;15(1):106-11. doi: 10.1109/tip.2005.859369.

Authors

Omer N Gerek¹, A Enis Cetin

Affiliation

¹ Department of Electrical and Electronics Engineering, Anadolu University, Eskişehir TR-26470, Turkey. ongerek@anadolu.edu.tr

PMID: 16435541
DOI: 10.1109/tip.2005.859369

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 5/3 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.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Algorithms*
Computer Graphics
Data Compression / methods*
Image Enhancement / methods*
Image Interpretation, Computer-Assisted / methods*
Numerical Analysis, Computer-Assisted
Signal Processing, Computer-Assisted*