Patent ID: 7350710
Filing Date: 2008-04-01
Classification: G06K

Abstract:
1. A two-dimensional code extraction method comprising: inputting image data; scanning said input image data in a square block unit of MXN pixels (M and N are positive integers); detecting blocks that satisfy specific conditions from scanned blocks; detecting a plurality of regions of blocks corresponding to a respective plurality of two-dimensional codes, each region of blocks comprising a number of neighboring and contiguous blocks from among said detected blocks that satisfy specific conditions from said scanned blocks; detecting one or more areas enclosing respective two-dimensional codes, each a two-dimensional code area enclosing by a margin a corresponding detected region of blocks comprising the predetermined number of the neighboring and contiguous blocks as the two-dimensional code; and extracting one or more two dimensional codes from among the detected one or more two-dimensional code areas that have more than a predetermined number of the neighboring and contiguous blocks.