AN EFFICIENT BLOCK WAVELET TRANSFORM FOR IMAGE CODING

An efficient block wavelet transform method for image coding is proposed. The image is partitioned into blocks and each block is processed independently. The data of the neighboring blocks are used as overlapped part to avoid edge artifact. In each block, the spatial combinative lifting method is used for performing the wavelet transform. Compared to the global wavelet transform the memory requirement of this method is reduced to the size of the overlapped block. Furthermore, the computational operations are reduced because of the utilization of the spatial combinative lifting method. Experimental results confirm the advantages of the proposed method.