| 摘要 |
A method of imaging a coding pattern disposed on a surface of a substrate. The method comprises the steps of: (a) operatively positioning an optical reader relative to the surface and capturing an image of a portion of the coding pattern, said coding pattern comprising: (b) sampling and decoding x-coordinate data and y-coordinate data within the imaged portion; and (c) determining a position of the reader. All the x-coordinate data is represented in a column of an imaged tag and all the y-coordinate data is represented in a row of the imaged tag. The column and the row each have a width v. The imaged portion has a diameter of at least (l+v)√2 and less than (2l)√2.
|
