Multi-layered Image Compression

The main contribution of this work is a new paradigm for image compression. We describe a new multi-layered representation technique for images. An image is encoded as the superposition of one main approximation, and a sequence of residuals. The strength of the multi-layered method comes from the fact that we use different bases to encode the main approximation and the residuals. For instance, we can use: – a wavelet basis to encode a coarse main approximation of the image, – wavelet packet bases to encode textured patterns, – brushlet bases to encode localized oriented textured features, etc.