Patent ID: 6678412
Filing Date: 2004-01-13
Classification: G06K

Abstract:
A method for estimating an existing area of an information code, comprising the steps of:inputting a two-dimensional image of an information code; storing image data of a predetermined image region on an image data memory, said image data including the two-dimensional image of said information code; and estimating an existing area of said information code in said image region of said image data memory based on said stored image data, said method further comprising the steps of: dissecting said image region into a plurality of search sections; counting brightness change points in each of said search sections based on image data of each search section; detecting a candidate region having a likelihood of involving said information code based on the count value of the brightness change points; identifying said candidate region as said existing area of said information code; obtaining an average of brightness-related values of said image data involved in said search section, and using said average of brightness-related values as one of judging conditions for detecting and identifying said candidate region.