Patent ID: 8363282
Filing Date: 2013-01-29
Classification: G06T

Abstract:
1. A method of processing a contone image, the method comprising: determining a bi-level bitmap of bits from a graylevel value, wherein each of the bits has a respective one of either a first value or a second value; partitioning the contone image into an array of contone image blocks; generating a sequence of graphical code word symbols encoding information; and producing blocks of an output halftone image from ones of the contone image blocks and ones of the graphical code word symbols in accordance with the values of respective ones of the bits of the bi-level bitmap, wherein ones of the output halftone image blocks associated with respective ones of the bits having the first value are derived from respective ones of the contone image blocks and ones of the output halftone image blocks associated with respective ones of the bits having the second value are derived from respective ones of the graphical code word symbols.