Patent ID: 7123768
Filing Date: 2006-10-17
Classification: G06K

Abstract:
1. A pattern-detection apparatus that detects a specific pattern contained in an image, said pattern-detection apparatus comprising: a binarizing unit that binarizes an input image data to obtain binary image data, a partial-image recognition unit that recognizes a partial image being contained in said binary image data and being part of said specific pattern, and a specific pattern determination unit that determines said specific pattern contained in said image, based on the recognition results obtained by said partial-image recognition unit, wherein said partial-image recognition unit recognizes a partial image contained in said binary image data, for a pixel-block area having a predetermined size and containing a target pixel in said binary image data, based on at least two of: conditions concerning the pixels at opposite vertices, conditions concerning pixels on outermost lines of said pixel-block area, and conditions concerning pixels on opposite sides on the outermost lines of said pixel-block area.