IMAGE DATA ENCODER, PROGRAM, COMPUTER-READABLE RECORDING MEDIUM, AND IMAGE DATA ENCODING METHOD

摘要

PROBLEM TO BE SOLVED: To achieve an image data encoder encoding image data including a plurality of objects having different image types at a high compression rate.

SOLUTION: The image data encoder 1 imitates the QM-Coder of JBIG. In this case, the image data encoder 1 comprises: a region determination section 22 that detects the image type of a region including a pixel to be encoded extracted by a context generator 21 and determines whether the detected result differs from a previous one; and a table change section 23 for resetting a learning table 32 stored in a recorder 31 when the region determination section 22 determines that the detected result differs from the previous one.

COPYRIGHT: (C)2008,JPO&INPIT