HVQ compression combined with orthogonal rotation

摘要

Using hierarchical vector quantization (HVQ) to accomplish rotation in addition to compression and decompression. During the compression step the image is divided into segments and each segment is reduced to a codeword (Cw1-Cw8). These codewords are transposed (step 3) so that the segments will be in rotated order when printed. Then the codewords are decompressed to form segments in which the pixels are in rotated order.