Patent ID: 6912320
Filing Date: 2005-06-28
Classification: H04N

Abstract:
1. A method for decompressing compressed data obtained by coding binary data, which comprises a plurality of data bit lines acquired from an image, for each data bit line, based on both a position of a color-changed pixel on said data bit line and a position of a color-changed pixel on a reference line adjacent to said data bit line, said method comprising the steps of: preparing a table which lists a plurality of bit patterns represented by a predetermined number of reference data bits, and lists a consecutive number of bits adjacent to a predetermined data bit of the reference data bits, that have the same color as the predetermined data bit; serially taking said predetermined number of reference data bits at a time from a bit sequence forming said reference line; searching said table with both said reference data bits and a position of the predetermined data bit in said reference data bits, and thereby detecting the consecutive number of bits adjacent to the predetermined data bit, that have the same color as the predetermined data bit; finding a pixel, adjacent to the predetermined data bit by a distance equal to the addition of 1 and the detected number of bits, as a color-changed pixel on said reference line; and decoding said compressed data, based on a position of said found color-changed pixel on said reference line.