Patent ID: 6671422
Filing Date: 2003-12-30
Classification: G06K,G06T

Abstract:
An apparatus for detecting the rough position of a two-dimensional code included in image data, comprising:means for determining a proportion of said two-dimensional code in each of small areas obtained by dividing said image data; wherein said means for determining said proportion includes: means for determining a difference in gray scale level between two neighboring pixels which are adjacent to each other or are spaced at a predetermined interval on predetermined scanning lines set in small areas; wherein said means for determining a difference in gray scale level includes means for detecting gray scale levels of pixels in said image data; and means for controlling the means for detecting gray scale levels to detect gray scale levels of pixels on said scanning lines; and subtracting means for determining a difference between gray scale levels of two neighboring pixels which are adjacent to each other or are spaced at a predetermined interval on said scanning lines in said small areas; and means for counting the number of the differences in gray scale level which are equal to or greater than a predetermined value and means for ranking said small areas based upon the proportions obtained.