A color transform unit transforms RGB components constructing image data into C1 to C3 components. Discrete wavelet transform units perform wavelet transform on the C1 to C3 components and generates coefficients of different number of subbands for at least two components. Coding units stepwisely perform...http://www.google.se/patents/US20010003544?utm_source=gb-gplus-sharePatent US20010003544 - Image processing apparatus and method and storage medium
