An image data processing apparatus includes a zero-value prediction compressor for compressing data by predicting a zero-value region of a high-layer from a low layer of a wavelet space and eliminating data in a space other than a meaningful space, a zero-value prediction expander for restoring data...http://www.google.fr/patents/US6148110?utm_source=gb-gplus-shareBrevet US6148110 - Image data processing apparatus and method
