| 摘要 |
There is provided a dot pattern in which an x-direction shift and a y-direction shift are alternately generated for each adjacent information dot on a virtual grating line, so that the x-direction shift and the y-direction shift are alternately generated for each dot. Accordingly, every other information dots are arranged on the same grating line. For this, when reading by an optical read device, the search algorithm for the virtual grating line on the image memory is simplified, which in turn simplifies the search of the grating point on the image memory. As a result, it is possible to increase the dot pattern read speed without using a complicated program. |
