Signal-adapted directional lifting scheme for image compression
- Resource Type
- Conference
- Authors
- Weisheng Dong; Guangming Shi; Jizheng Xu
- Source
- 2008 IEEE International Symposium on Circuits and Systems (ISCAS) Circuits and Systems (ISCAS), 2008 IEEE International Symposium on. :1392-1395 May, 2008
- Subject
- Components, Circuits, Devices and Systems
Communication, Networking and Broadcast Technologies
Engineered Materials, Dielectrics and Plasmas
Image coding
Wavelet transforms
Discrete wavelet transforms
Adaptive filters
Error correction
Signal design
Geometry
Information filtering
Information filters
Image reconstruction
- Language
- ISSN
- 0271-4302
2158-1525
In this paper, we propose a new adaptive lifting scheme that not only locally adapts the filtering directions to the orientations of image features, but also adapts the lifting filters to the statistic properties of image signal. The proposed approach refines previous adaptive directional lifting-based wavelet transform (ADL) by combining directional lifting and adaptive lifting filters to form a unified framework. The image signal is first segmented into regions of textures and edges with close directional features. The lifting filters are then effectively designed. The prediction step is designed to minimize the prediction error of the image signal, and the update step is designed to minimize the reconstruction error. Significant improvements on objective and subjective quality over conventional 2-D wavelet transform and previous ADL transform are achieved.