Patent ID: 7486822
Filing Date: 2009-02-03
Classification: G06F,G06K

Abstract:
1. A computer-readable storage medium storing instructions, that when executed on one or more processors, perform a method, the method comprising: storing, in a computer-readable storage medium, a first graphical pattern comprising at least one row of dark pixels followed by at least one row of light pixels, wherein the first graphical pattern represents a first bit of a data stream; storing a second graphical pattern comprising at least one column of dark pixels followed by at least one column of light pixels, wherein the second graphical pattern represents a second bit of the data stream; and encoding, by a processor, the data stream to create an overall graphical pattern with the bits of the data stream being represented by the first and second graphical patterns such that a type of shape does not occur in the overall graphical pattern at the intersection of individual graphical patterns when the first graphical pattern and second graphical pattern are juxtaposed together to form the overall graphical pattern, wherein an absence of the type of shape provides orientation information to the overall graphical pattern.