1. A method of transcoding image data in a compressed format comprising the steps of: decoding differential pulse code modulation DC frequency components of plural image blocks; partitioning the image into a plurality of image cells, each image cell including a plurality of image blocks; recoding DC frequency components of plural image blocks in differential pulse code modulated format, said differential pulse code modulated of said image blocks contained solely within a corresponding image cell; extracting the Huffman tables from the image data; storing said extracted Huffman tables together with an indication of an associated image cell in a header for said image cell; identifying image blocks by a block count; and recoding said identified image blocks into corresponding image cells.