The method generates a compressed digital image from a original image. The
compressed digital image allows random access to portions of the
compressed image at a number of resolutions. The original image is first
transformed (103) by a multi-level DWT to form a non redundant multiple
resolution frequency domain representation of the image. The
representation comprises a DC subband and a plurality of high frequency
subbands arranged as levels, where each level represents a frequency
contribution between adjacent resolutions and where each subband
comprises a plurality of tiles. The DC subband is then entropy encoded
(104) into the bitstream. The high frequency subbands are next entropy
encoded (108,109, and 110) into the bitstream in level order
(105,113,114) and tile order (107,111).