Orientation Adapted Subband Image Compression

In this paper, a subband coding system which dynamically adapts to the local orientation of image features is investigated. In particular, the re-orientation scheme proposed in [1] is used in conjunction with a separable octave-band subband decomposition. This is then followed by e cient coding techniques such embedded zerotrees, trellis coded quantization, and stackrun coding. The coded images demonstrate the superior subjective performance of the proposed methods.