Patent ID: 6408106
Filing Date: 2002-06-18
Classification: G06K

Abstract:
An information reading system adapted to optically read a code optically readably recorded on an information recording medium and including data patterns recorded according to a given piece of information and markers of a predetermined size arranged with predetermined positional relationships relative to the data patterns and provided for use in determining the position for reading each of the data patterns,said markers being optically identifiably recorded in a mode different from the mode of recording said data pattern, said information reading system comprising: an imaging section for imaging said code from said information recording medium; an image memory section for storing at least a partial region of said image picked up by said imaging section; an attribute determining section for determining the attributes of a unit of a predetermined number of adjacently located pixels, the number of pixels being determined on the basis of the size of said markers, in order to discriminate said markers from said data patterns in the image stored in said image memory section; a marker detecting section for detecting said markers on the basis of the attributes determined by said attribute determining section; and a data reading section for determining the positions for reading said data patterns on the basis of the positions of the markers detected by said marker detecting section and reading the data.