Discrete wavelet transform apparatus and method which can adaptively encoding a still image based on the block-by-block energy

摘要

A discrete wavelet transform coding apparatus capable of adaptively on the basis of the block-by-block energy of a still image is started. Discrete wavelet transform unit, for calculating the energy in a block unit composed of an image input to the predetermined pixel energy calculator, image decomposition, depending on the size of the energy values ​​calculated in units of blocks to variable-level de-composition process the blocks adaptively part, and of the corresponding block in the adaptive variable-level de-composition region on the basis of the energy value of the affected part has a coefficient of reconstructing an image by replacing a region in which the high frequency component distribution to zero. ; Still images, the wavelet, JPEG 2000, energy calculation, Composition D, coefficient substitution