Generalised method for pruning an FFT type of transform
Swarnalatha Rangarajan, Swaminathan Srinivasan · IEE Proceedings - Vision Image and Signal Processing · 1997
A new pruning method for an FFT type of transform structure is proposed. Its novelty lies in the fact that, besides being able to prune the transform, it is able to complete a previously pruned transform or to progress from one level of pruning to another. The method can be directly applied to fast progressive image coding.