Blockwise zero mapping image coding
A coding algorithm of low addressing and implementation complexity is proposed. It is based on partitioning uniformly quantized wavelet coefficients into multiscale blocks with each block classified as either an all-zero block or a non-zero block. The non-zero blocks are coded by a new method called zero-mapping whose outputs are further compressed by a first-order arithmetic coder. The performance of the proposed coding algorithm compares favorably with that of some well-known coding algorithms, particularly for images with considerable high frequency components.