Overcomplete image coding using iterative projection-based noise shaping

Overcomplete transforms, like the Dual-Tree Complex Wavelet Transform, offer more flexible signal representations than criticallysampled transforms. Large numbers of transform coefficients can be discarded without much reconstruction quality loss by forcing compensatory changes in the remaining coefficients. We develop and demonstrate a new and unique system for achieving these transform coding aims of coefficient elimination and compensation. The system is based on iterative projection of signals between the image domain and transform domain.

• Type: Conference
• Year: 2002
• Where: ICIP
• Authors: Nick G. Kingsbury, Tanya Reeves
• Keywords: Complex Wavelet Transform, ICIP 2002, Image Processing, Transform Coding Aims, Transform Coefficients